WO2020000515A1

WO2020000515A1 - Operating lamp

Info

Publication number: WO2020000515A1
Application number: PCT/CN2018/095311
Authority: WO
Inventors: 曾骄阳; 曾灵芝; 陈俊达; 陈道蓉; 曾胜
Original assignee: 朗昭创新控股（深圳）有限公司
Priority date: 2018-06-27
Filing date: 2018-07-11
Publication date: 2020-01-02

Abstract

An operating lamp (100), comprising a lamp housing (1) and a light source assembly (2). The light source assembly comprises a plurality of light source structures (20). Each light source structure (20) comprises a near-natural light LED light source (22). Each near-natural light LED light source emits near-natural light. In the near-natural light, the relative spectral power of red light is greater than 0.60, the relative spectral power of cyan light is greater than 0.30, the relative spectral power of blue light is less than 0.75, the color rendering index of the near-natural light is greater than 95, and the color temperature is greater than 4000 K. According to the operating lamp, the near-natural light is provided by using the near-natural light LED light source to provide a luminous environment which is pure in light color and comfortable for operation implementation, the near-natural light has a complete illumination spectrum and is closer to natural light of the same color temperature, and low blue light illumination can reduce eye fatigue and dryness, thereby reducing damage to the human eyes. High color rendering index illumination is conducive to the identification of human tissues by medical workers.

Description

Surgical lamp

Technical field

The present invention relates to the field of lighting technology, and more particularly, to a surgical lamp.

Background technique

Surgical light is an indispensable and important device for surgical lighting in medicine. It is required to best reflect the differences and lesion characteristics of multiple human tissues in the incision and body cavity. In addition to the basic requirements for forming a shadowless illuminated area, the light source of the surgical lamp also requires good light intensity, good light concentration, high color temperature, and high color rendering index. Existing LED surgical lights on the market, where the color temperature of the light source is above 4000K, all have the problems of incomplete illumination spectrum, low color rendering, and high ratio of blue light to the relative spectrum, as shown in Figure 12, especially the color temperature of 5000K The above is more prominent. High blue light illumination easily leads to visual fatigue, dry eyes, and low color rendering is not conducive to the observation of human tissues, and affects the surgical process of medical personnel.

technical problem

An object of the embodiment of the present invention is to provide a surgical lamp, which aims to solve the technical problems of incomplete lighting spectrum, low color rendering, and high ratio of blue light to the relative spectrum of the surgical lamp in the prior art.

Technical solutions

In order to solve the above technical problem, the technical solution adopted in the embodiment of the present invention is to provide a surgical lamp, which includes a lamp housing and a light source component; a front cover of the lamp housing is provided with a plurality of through holes, and the light source component includes a plurality of A light source structure corresponding to a plurality of the through holes; each of the light source structures includes at least one near-natural LED light source, the near-natural LED light source emits near-natural light; and the relative spectral power of the red light in the near-natural light is greater than 0.60 The relative spectral power of cyan light in the near-natural light is greater than 0.30; the relative spectral power of blue light in the near-natural light is less than 0.75; the color rendering index of the near-natural light is greater than 95; and the color temperature of the near-natural light is greater than 4000K.

Beneficial effect

The beneficial effects of a surgical lamp provided by embodiments of the present invention are:

Due to the use of near-natural LED light sources to form the light source structure and light source components to provide near-natural light, the relative spectral power of red light in this near-natural light is greater than 0.60, the relative spectral power of cyan light is greater than 0.30, and the relative spectral power of blue light is less than 0.75. The color rendering index of natural light is greater than 95, and the color temperature is greater than 4000K. The natural light has a complete illumination spectrum, outputs a visible spectrum of 400-700nm, and is closer to natural light of the same color temperature. It provides a pure and concentrated lighting environment for the operation. , Low blue light illumination can reduce eye fatigue, dryness, reduce damage to human eyes, and high color rendering index illumination, which is conducive to the identification of human tissues by medical staff and improve the efficiency and success rate of surgery.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions in the embodiments of the present invention more clearly, the drawings used in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only the present invention. In some embodiments, for those of ordinary skill in the art, other drawings may be obtained based on these drawings without paying creative labor.

FIG. 1 is an overall assembly diagram of a surgical lamp provided by the present invention; FIG.

FIG. 2 is a schematic view of the overall assembly of the surgical lamp provided by the present invention from another angle; FIG.

3 is an exploded perspective view of a surgical lamp provided by the present invention;

4 is an enlarged view of the carrier plate in FIG. 3;

FIG. 5 is a schematic diagram of a three-dimensional structure of a near-natural LED light source according to an embodiment of the present invention; FIG.

6 is a top view of a near-natural LED light source according to an embodiment of the present invention;

7 is a cross-sectional view taken along A-A of a near-natural LED light source according to an embodiment of the present invention;

8 is a bottom view of a near-natural LED light source according to an embodiment of the present invention;

FIG. 9 is a schematic diagram of near-natural light spectrum provided by an embodiment of the present invention; FIG.

FIG. 10 is a spectrum test report diagram of near-natural light shown in FIG. 9; FIG.

11 is a spectrum comparison diagram of a near-natural light source and natural light provided by an embodiment of the present invention;

FIG. 12 is a spectrum comparison chart of a conventional near-natural light source and natural light; FIG.

FIG. 13 is a spectrum diagram of a white light emitter provided by an embodiment of the present invention; FIG.

14 is a white light spectrum diagram using a 452.5-455nm blue light chip provided by an embodiment of the present invention;

FIG. 15 is a spectrum diagram of a near-natural light source in the prior art.

Embodiments of the invention

In order to make the technical problems, technical solutions and beneficial effects to be more clearly understood by the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

1 to 3 and FIG. 11, the present invention provides a surgical lamp 100 including a lamp housing 1, a light source assembly 2, and a driving assembly 3; the lamp housing 1 has a front cover 10 and a ring shape connected to a periphery of the front cover 10. The side plate 11 and the front cover 10 are provided with a plurality of openings 12, the light source module 2 includes a plurality of light source structures 20 provided one to one corresponding to the plurality of openings 12, and the driving module 3 is electrically connected to the light source module 2; The structure 20 includes one or more near-natural LED light sources 22, and each near-natural LED light source 22 emits near-natural light, and the relative spectral power of red light in the near-natural light is greater than 0.60, the relative spectral power of cyan light is greater than 0.30, and blue The relative spectral power of colored light is less than 0.75, the color rendering index of this near-natural light is greater than 95, and the color temperature is greater than 4000K.

In the surgical lamp 100 provided by the present invention, the light source assembly 2 includes a plurality of near-natural LED light sources 22, and each near-natural LED light source 22 emits near-natural light. The relative spectral power of the red light in the near-natural light is greater than 0.60, and the cyan light The relative spectral power is greater than 0.30, the relative spectral power of blue light is less than 0.75, the color rendering index of the near-natural light is greater than 95, and the color temperature is greater than 4000K, which provides a pure and concentrated lighting environment for the operation, low blue light illumination, It can reduce eye fatigue and dryness, reduce damage to human eyes, and high color rendering index lighting, which is conducive to the identification of human tissues by medical staff, and improves the efficiency and success rate of surgery.

Specifically, the material of the casing may be a metal material, such as aluminum, stainless steel, or a plastic material, such as PVC (polyvinyl chloride).

Referring to FIG. 3, a plurality of light source structures 20 are uniformly arranged in a ring shape on the front cover 10 of the lamp housing 1. In other embodiments, there may be more light source structures 20 arranged in two or more rings, and the light source structures 20 in each ring are evenly arranged to meet the light intensity requirements of the surgical lamps 100 of different sizes or specifications.

Each light source structure 20 includes a PCB (not shown) and one or more near-natural LED light sources 22 disposed on the PCB, and a reflector 23 disposed in front of the PCB and a heat sink 26 disposed behind the PCB. The radiator 26 has a bowl shape, and the light source board and the reflective cup 23 are accommodated therein. The PCB board and one or more near-natural LED light sources 22 provided on the PCB board become a light source board.

The reflector cup 23 is a hollow truncated cone. The diameter (including the outer diameter and the inner diameter) of one end facing the PCB is larger than the diameter (including the outer diameter and the diameter) of the other end. The light source board is provided with a plurality of near-natural LED light sources 22. One side is disposed toward the smaller diameter end of the reflector cup 23, and one or more near-natural LED light sources 22 are confined within the reflector cup 23. Therefore, the light rays of the plurality of near-natural LED light sources 22 have a certain light emitting angle after being reflected in the reflector cup 23. The material of the reflector cup 23 may be a metal material, such as aluminum, and its inner wall is smooth, which is beneficial to the reflection of light.

The other end of the reflector cup 23 is connected to a lens 24. The lens 24 may be a condensing lens 24. The light from the near-natural light LED illuminant is reflected in the reflector cup 23 and condensed by the lens 24 and then emitted, so that the surgical lamp 100 can reach a specified Location and area to meet the needs of different surgical positions and human tissue observation.

The heat sink 26, the light source plate, the reflector cup 23, and the lens 24 form a light source structure 20. The lens 24 and the front end of the heat sink 26 may be further fixed by, for example, a surface ring (not shown) to stabilize each light source structure 20. The material of the heat sink 26 is a metal, such as a metal having a high thermal conductivity and a small density, such as aluminum and copper.

A deflector 5 is also connected to the rear of the radiator 26 for driving each light source structure 20 to rotate. Specifically, the steering gear 5 has a spherical structure, such as a hemispherical surface. The radiator 26 is sized to be placed in the steering gear 5. The radiator 26 has a first through hole 220, and the steering gear 5 is provided with a second through hole. The hole 50, the second through hole 50 and the first through hole 220 are fixed together by a shaft pin 60. By rotating the shaft pin 60, the steering gear 5 can be rotated relative to the central axis of the shaft pin 60, which can drive heat dissipation. The device 26 is also rotated relative to the central axis of the shaft pin 60, and each light source structure 20 can be rotated relative to the central axis of the first through hole 220 on the radiator 26. Therefore, the first through hole 220 should be provided outside the central axis of the radiator 26 and the light source plate, and the second through hole 220 should be provided outside the central axis of the steering gear 5 so that the steering gear 5 and the heat sink 26 can be rotated during rotation. The light emitting direction of each light source structure 20 is changed relative to the central axis of the front cover 10 of the lamp housing 1, thereby changing the spot area illuminated by the surgical lamp 100.

The turning of the diverter 5 is operated by a dimming module. The dimming assembly includes a rotating member (not shown) for driving each steering gear 5 or the shaft pin 60 to rotate, and an operating handle 40 for driving or driving the rotating member to rotate and for medical personnel to operate. A part of the operating handle 40 is The rear of the lamp cover is used to connect with the rotating member, and the other part protrudes from the front cover 10 of the lamp body for easy operation. A part of the operating handle 40 located on the front cover 10 of the lamp body is further provided with a disinfecting handle cover (not shown). As a result, the medical staff rotates the operation handle 40. The operation handle 40 drives the rotating member behind the lamp cover to rotate, and the rotation of the rotating member causes each pivot pin 60 to rotate about its own central axis. Finally, the steering gear 5 and the light source inside it The structure 20 rotates about the central axis of the shaft pin 60, and the light emitting direction of the light source structure 20 is changed relative to the central axis of the lamp cover to achieve dimming.

The driver is electrically connected to the power source component, that is, electrically connected to each light source structure 20, and is used to control the working state of each light source structure 20. The driver can be arranged behind the lamp cover.

As shown in FIG. 3, a bearing plate 25 may be further provided between the heat sink 26 and the reflector cup 23, which is suitable for the case where the size of the light source plate is small, and also for fixing and protecting the light source plate. The carrier plate 25 is flat and has a groove 251 on the side facing the heat sink 26 and the center of the groove 251 is an opening 252. The light source board is engaged in the groove 251 and one or more near-natural LEDs emit light. After the body is exposed from the opening 252, it is aligned with one end of the reflector cup 23. An annular recess (not shown) corresponding to the reflector cup 23 may also be provided on the side of the carrier plate 25 facing the lens 24, and the reflector cup 23 is engaged in the annular recess so that the position between the light source plate and the reflector 23 The relationship is relatively fixed.

Further, the carrier plate 25 can be installed in the heat sink 26 in a relatively stable state by means of screw (not shown) installation, etc., so that the positional relationship between the heat sink 26 and the light source plate and the reflector cup 23 is relatively fixed. If the bearing plate 25 is not provided, it is likely that when the radiator 5 drives the radiator 26 to rotate, the reflector cup 23 may not receive the steering force in time and damage the light source plate. The material of the carrier plate 25 is preferably a metal material, such as aluminum, copper, etc., and is also used as a heat dissipation structure to transfer the heat of the light source plate to the heat sink 26.

Next, the near-natural-light LED light source 22 of the present invention will be described in detail.

Explanation of technical terms:

1. Relative spectral power: The spectrum emitted by a light source is often not a single wavelength, but is composed of a mixture of many different wavelengths of radiation. The spectral radiation of a light source in terms of wavelength order and intensity distribution at each wavelength is called the spectral power distribution of the light source.

The parameters used to characterize the spectral power are divided into absolute spectral power and relative spectral power. Further absolute spectral power distribution curve: refers to the curve made by the absolute value of light energy of various wavelengths of spectral radiation;

Relative spectral power distribution curve: refers to the spectral power distribution curve that compares the energy of various wavelengths of the light source's radiation spectrum with each other and normalizes the radiated power to change only within a specified range. The maximum relative spectral power of the radiated power is 1, and the relative spectral powers of other wavelengths are all less than 1.

2. Color ratio: Any white light can be obtained by mixing the three primary colors of red, green, and blue in corresponding proportions. In order to indicate the relative proportions of the three primary colors of R, G, and B in the total white light, the chromaticity coordinates r, g, and b are introduced, where , R = R / (R + G + B), g = G / (R + G + B), b = B / (R + G + B), r + g + b = 1, r, g, b They are red light color ratio, green light color ratio, and blue light color ratio.

Please refer to FIG. 5 to FIG. 8, an embodiment of the present invention provides a near-natural light LED light source (hereinafter referred to as “the light source”), which can be used for various lighting devices. The near-natural light LED light source includes a base layer 210, at least one group of light emitting components disposed on the base layer 210, and a circuit board 230 electrically connected to the light emitting components; each group of light emitting components includes a white light emitting body 221, a white light emitting body 221, and red light emitting Body 222, white light emitter 221, white light emitter 221 includes a blue light chip and a fluorescent film covering the blue light chip, red light emitter 222 includes a red light chip; white light emitted by the white light emitter 221 is mixed with red light emitted by the red light emitter 222 Red light is used to compensate for the part of white light that is missing from the natural spectrum, forming near-natural light; the relative spectral power of red light in near-natural light is greater than 0.60; the relative spectral power of cyan light in near-natural light is greater than 0.30; blue light in near-natural light The relative spectral power is less than 0.75.

In the field of LED lighting, research on lighting sources that are close to natural light is one of the development trends in this field. It is also the direction that many researchers and units have been working hard. There are also some lighting products dedicated to close to natural light in the existing technology. The light produced by this product is "near natural light". Near natural light means that the spectral shape (relative spectral power of the corresponding band) is close to natural light, at least some of the optical parameters are close to natural light, and the degree of closeness is not limited to a certain value. The near-natural LED light source in this embodiment is also designed to achieve a lighting effect closer to natural light, and to reduce the proportion of blue light. The main performance is that the relative spectral power is closer to natural light, and multiple optical parameters are closer to natural light.

Specifically, as mentioned above, the basic supporting structure of the light source is the base layer 210, and the light-emitting components are disposed on the base layer 210. The number of the light-emitting components is one, two, or more. The structure and function of each light-emitting component are both Are consistent. This embodiment is preferably a group. Each group of light-emitting components includes a white light-emitting body 221 and a red light-emitting body 222, that is, the near-natural light emitted by the light source is achieved by a mixture of white light and red light. Among them, the red light is used to compensate the part of the white light that is missing from the natural spectrum, thereby forming near-natural light close to natural light. The white light emitting body 221 includes a blue light chip and a fluorescent film covering the blue light chip. The red light emitting body 222 includes at least a red light chip. The monochromatic light emitted by the blue light chip is wavelength-converted through the fluorescent film to generate other colored light. Later, white light is formed, and the white light and red light are mixed to form near-natural light. The near-natural light has the following spectral parameters: the relative spectral power of red light is greater than 0.60; the relative spectral power of cyan light is greater than 0.30; and the relative spectral power of blue light is less than 0.75. Each group of light-emitting components can emit near-natural light, so when the light source includes multiple groups of light-emitting components, it can also emit near-natural light.

The wavelength range of various colored lights in visible light is as follows: red light (622 ~ 700nm), orange light (597 ~ 622nm), yellow light (577 ~ 597nm), green light (492 ~ 577nm), cyan light (475 ~ 492nm), Blue light (435 ~ 475nm), purple light (380 ~ 435nm).

As shown in Figs. 9 to 11, the near-natural light spectrum graphs and spectral test data of the present invention are respectively shown. It can be seen from the graph that the spectrum satisfies the above-mentioned spectral parameters of red light, cyan light, and blue light. In addition, the proportion of blue light Being reduced, it is close to natural light and also good for health. Referring to FIG. 12, the existing near-natural light spectrum and the natural light spectrum still have a large gap, the blue light component is high, and a significant deficiency occurs in the red light part and the blue light part.

In addition, in the field, according to a large number of traditional white light illumination rules, the higher the white light color temperature, the higher the proportion of its short-wavelength components, the higher the blue light, and even the higher the purple light. There is no doubt that high blue light is harmful to health. In fact, at the same time, high color temperature is conducive to improving recognition, enhancing the brightness of the environment, and improving the mental state of people. It is also a common sense that conventional light sources are usually white light with high color temperature and blue light. According to FIG. 10, the light source still satisfies the relative spectral power of blue light of less than 0.75 under a high color temperature of more than 4000K, and is a kind of high color temperature and low blue light illumination, which can simultaneously have the effects of using eye health and stimulating mental state.

The surgical lamp provided by the embodiment of the present invention has at least the following effects:

First, the near natural light LED light source of the surgical lamp is closer to natural light. Compared with traditional white light illumination, the blue light is lower and the visual experience is more comfortable. It is beneficial to reduce the long-term exposure of medical staff to the sub-cause Health issues.

Secondly, the relative spectral power of blue light can be controlled at a low level while maintaining a high color temperature, which can take into account the goals of eye protection and visual effects and improve the mental state of the user, thereby improving the efficiency of the surgical process and ensuring the safety of the operation.

Third, the relative spectral power of red light is increased, making the spectrum closer to natural light, and 640-700nm red light has health care functions, thereby improving the health level of near-natural light illumination.

In this embodiment, the wavelength range of the blue light chip is 450-480 nm; the wavelength range of the red light chip is 640-700 nm, and the center wavelength of the red light chip is preferably 690 ± 5 nm. Preferably, the wavelength range of the blue light chip is 457.5-480nm, and at least 457.5-460nm. The embodiment of the present invention breaks through the conventional practice (using a 450-455nm blue light chip), selects a 457.5nm-480nm blue light chip, and combines a fluorescent film with a two-pronged approach to significantly increase the relative spectral power of the blue light. At the same time, due to the improvement of glaucoma, it also means R12. As shown in FIG. 14, the relative spectral power of the blue light in the conventional near-natural light is lower than 0.3. As shown in FIG. 9 and FIG. 10, the relative spectral power of the blue light in this embodiment is above 0.4.

Further referring to FIG. 13 and FIG. 14, FIG. 13 shows the spectrum of the white light emitting body 221 in this embodiment. When a blue light chip of 457.5nm-460nm is used, the relative spectral power of the blue light has reached above 0.5, such as 457.5nm-480nm. For blue light chips, the relative spectral power of blue light can be further increased. When a 452.5-455nm blue light chip is used in FIG. 14, the relative spectrum of the blue light is only between 0.35 and 0.38.

The fluorescent film includes a colloid and a fluorescent powder mixed inside the colloid. The fluorescent powder includes red powder, green powder, and yellow-green powder; the color coordinates of the red powder are X: 0.660 to 0.716, Y: 0.340 to 0.286; the color coordinates of the green powder are X: 0.064 ～ 0.081, Y: 0.488 ～ 0.507; color coordinates of yellow-green powder are X: 0.367-0.424, Y: 0.571-0.545; weight ratio of red powder, green powder and yellow-green powder are: red powder: green powder: yellow-green powder = (0.010 ～ 0.035): (0.018 ～ 0.068): (0.071 ～ 0.253); the concentration of the fluorescent film is 17% ～ 43%. The particle sizes of the red powder, green powder, and yellow-green powder are all less than 15 μm, and preferably 13 ± 2 μm.

By selecting the above blue light chip and fluorescent film, white light can be obtained, and its spectrum is shown in FIG. 13. It has the following optical parameters: when the color temperature is 4000K-4200K, the relative spectral power in the 480-500nm band is greater than 0.45; the relative spectral power in the 500-640nm band is greater than 0.65; when the color temperature is 5500K-6000K, the relative spectral power in the 480-500nm band Greater than 0.4; relative spectral power in the 500-640nm band is greater than 0.60. The combination of the white light emitting body 221 and the red light emitting body 222 can obtain a near-natural LED light source, and can emit near-natural light.

Further, referring to FIG. 11 and FIG. 12, the spectrum of the light source is also very similar to natural light in other wavelength bands, but the existing near-natural light source is difficult to achieve. As shown in Figures 9 and 10, the relative spectral power of orange light in near-natural light according to the present invention is greater than 0.55; the relative spectral power of yellow light is greater than 0.50; the relative spectral power of green light is greater than 0.35; the relative spectral power of purple light is less than 0.10, both Close to natural light.

In addition, the light source has more strict optical parameter requirements, such as color temperature, color tolerance, color rendering index Ra, color rendering index R9, color rendering index R12, blue color ratio, and so on, while optimizing the spectrum of each band. Specifically, the color temperature of near-natural light includes 4000K-6500K, the color tolerance is less than 5, and the blue light color ratio is less than 5.7%. The explicit index Ra is greater than 95, of which the explicit index of R9 is greater than 90 and the explicit index of R12 is greater than 80. According to FIG. 10, it can be determined that the light source can meet the above requirements, and the blue light color ratio of the light source can be reduced to less than 5.5%, the color rendering index Ra is increased to more than 97, the color rendering index R9 is more than 95, and the color rendering index R12 is 83. In other test reports, the color rendering index R12 can reach 87. The display of the patient's focus is more real and reliable, and it is especially suitable for fine tissue surgery.

Further, blue light at 440 nm of blue light has the greatest damage to vision. As a further optimization solution, in this embodiment, the relative spectral power of 440 nm blue light is used as the optical parameter to be detected. When the blue light color ratio is lower than 5.7%, the relative spectral power of the 440nm blue light is lower than 0.65. When the near-natural light color temperature of the present invention is 2700K-3000K, the relative spectral power of 440nm blue light is less than 0.50, and when the near-natural light color temperature is 4000K-4200K, the relative spectral power of 440nm blue light is less than 0.60, and the near-natural light color temperature is 5500K At -6000K, the relative spectral power of 440nm blue light is less than 0.65. This is difficult to achieve with existing near-natural light. In the existing near-natural light products, although the blue light color ratio is low, the suppression of the 440nm blue light that is most harmful to the human eye is not obvious, and the eye protection function is minimal.

In the present invention, micro white light emitters 221 and red light emitters 222 are preferably used. According to the luminous flux ratio and the size of the installation space, small size and high cost-effective blue light chips and red light chips are selected, and as few red light emitters 222 as possible are preferred. And the white light emitting body 221 to make a single light source, and one light source is provided with a group of light emitting components. Because the light source can emit near-natural light directly, and can be used in various lamps, any combination can ensure its better luminous effect and strong adaptability. Of course, multiple groups of light-emitting components can also be integrated into one light source. At this time, a better light output effect can still be guaranteed, and only the size is increased.

Preferably, the white light-emitting body 221 and the red light-emitting body 222 may use micro-light-emitting bodies that meet performance requirements. The light source is a micro-light bead as a whole, and multiple light beads may be arranged on the circuit board 230 of various lamps in any form. Due to its small size, it can be set at any position on the circuit board 230, it is flexible in application, the whole light of the lamp is uniform, and the lighting effect is good.

Specifically, the ratio of the light flux of the white light emitting body 221 to the light radiation amount of the red light emitting body 222 is 2-10: 1, preferably 2-3: 1. This ratio slightly fluctuates at different color temperatures. In one embodiment, the ratio of the number of the white light emitters 221 to the number of the red light emitters 222 is 1-8: 1, and more preferably 1-4: 1. The actual light radiation amount of the red light emitting body 222 is 80-160 mW, and the total light flux of the white light emitting body 221 is 200-350 lm.

In one embodiment, there are four white light emitters 221 and one red light emitter 222. The four white light emitters 221 are arranged around the red light emitters 222 and are evenly distributed.

In another embodiment, there are two white light emitters 221, one red light emitter 222, and two white light emitters 221 are symmetrically disposed on both sides of the red light emitter 222.

The combination of white light emitter 221 and red light emitter 222 is used to obtain quasi-natural light, the structure is simple, and the variable controllability is good during the debugging process, so that the quasi-natural light debugging can be realized, and the combination of multiple illuminants cannot call quasi-natural light. The problem of quasi-natural light is obtained by supplementing the red light emitter 222, which solves the problem that the quasi-natural light cannot be obtained by combining the blue light chip and the fluorescent glue. With regard to the mounting method of the chip, it is preferable to flip the blue light chip and the red light chip on the surface of the base layer 210. The flip chip is effective for the effective connection with the circuit board 230 on the base layer 210, which is effective for heat dissipation. Uniform film formation ensures good consistency of the fluorescent films of different products, which can avoid the problem of poor consistency caused by the dispensing process of chip mounting. At the same time, different products are in the same BIN position when the color temperature is the same, and the color temperature consistency is good.

In addition, the flip chip also reduces the size of the white light emitting body 221, which is beneficial to the size control of the light source. In this embodiment, the width of the white light emitting body 221 is less than 0.8 mm and the height is less than 0.3 mm. The red light emitting body 222 can be controlled within the same range. The distance between the adjacent white light emitting body 221 and the red light emitting body 222 is 1 mm or less. The length of this light source is less than or equal to 6mm, and the width is less than 3mm.

Of course, the present invention is not limited to the use of flip-chips, and it is also feasible to use front-loaded chips.

In one embodiment, the base layer 210 is preferably a sheet structure made of a non-metallic material. The base layer 210 is provided with a reflective cup 211. The white light emitter 221 and the red light emitter 222 are disposed in the reflection cup 211. The circuit board 230 is formed on the surface of the base layer 210, and is wrapped on the front and back sides of the base layer 210, and leads are formed outside the reflection cup 211. A part of the circuit board 230 is exposed at the bottom of the reflection cup 211, and is used for connecting with the white light emitting body 221 and The red light emitter 222 is connected.

Furthermore, a reflective surface 2111 is provided on the inner wall of the reflection cup 211, and the inside of the reflection cup 211 is filled with a sealing gel (not shown). The reflection surface 2111 is used for reflecting white and red light, and the sealing gel is used to protect the reflection cup. The internal structure of 211 and the structure of the light source are more stable, and the refraction adjustment of the light is performed. White light and red light are fully mixed and output through the encapsulant. Specifically, the light emitting angle of the white light emitting body 221 and the red light emitting body 222 may be about 160 ° to 180 °, and the light emitting angle of the light source is about 120 °. The entire light source is a small, uniform, near-natural light bead.

In this embodiment, the circuit board 230 has several sets of positive and negative pins, and each luminous body may correspond to a set of positive and negative pins, or several luminous bodies may correspond to a set of positive and negative pins. In terms of driving methods, there are two embodiments. One is that the white light emitting body 221 and the red light emitting body 222 are respectively connected to different positive and negative pins, and are driven separately. At this time, the respective driving currents are different, which can be performed in cooperation with the control chip. control. Secondly, the white light emitting body 221 and the red light emitting body 222 are connected in series, that is, the same positive and negative poles are connected, and the same current is driven uniformly without the need of a control chip for control. This unified driving method obviously has obvious advantages. It does not need to configure different driving currents for different light emitters, does not need to increase the control circuit board 230, and only needs to supply power according to its corresponding current. Therefore, the structure is more simplified, the volume is further reduced, the application is more simple and flexible, and the cost is lower.

5 and 6, two white light emitters 221 and one red light emitter 222 are connected in series. The two white light emitters 221 are connected to a first pin 231 respectively, and the first pin 231 protrudes from the bottom of the reflection cup 211. Used to connect external power. The red light emitting body 222 is connected in series between the two white light emitting bodies 221.

Further, the light source may also be provided with a second pin 232. The second pin 232 is not used to connect to an external power source, but is used for heat dissipation, as well as improving the overall symmetry of the light source, improving the strength, and mounting on the circuit board 230. The stability.

Regarding the optical performance of this light source, it should also be mentioned that the relative spectral power of 640-700nm red light has been significantly improved when the spectrum and optical parameters of the light source meet the requirements, which is in the existing near-natural light sources. It is difficult to achieve, mainly manifested in the improvement of red light and the overall spectrum shape and other light parameters. In this embodiment, as shown in FIG. 9, the relative spectral power of red light with a wavelength of 680 to 700 nm is greater than 0.80; the relative spectral power of red light with a wavelength of 622 to 680 nm is greater than 0.60. As shown in Figures 12 and 15, the traditional near-natural light source will show a significant downward trend in the band after 640nm. 640-700nm red light has excellent health, physical therapy, and cosmetic effects, and is beneficial to the health of patients.

And, after testing with different color temperature light sources, the relative spectral power of 640-700nm red light is greater than 0.60 when the color temperature of near-natural light is 4000K-4200K; the relative spectral power of 640-700nm red light when the color temperature of near-natural light is 5500K-6000K Greater than 0.50.

In the following, the optimization process of the near-natural light LED light source is briefly explained.

The optimization process for the same drive current includes the following steps:

Step S101, selecting a first light emitter, the first light emitter is used to emit white light;

Step S102, optimizing the spectral distribution of the first luminous body, and optimizing the white light into the first near-natural light;

Step S103: Determine a to-be-optimized wavelength band of the first near-natural light according to a spectral distribution of the first near-natural light and a spectral distribution of the natural light;

Step S104, selecting a second light emitter according to the waveband to be optimized;

Step S105: Determine an initial luminous flux ratio of the first luminous body and the second luminous body;

Step S106, by adjusting the spectral distribution of the first and second light emitters, optimizing the combined spectrum of the first and second light emitters to obtain near-natural light and driving current of the first and second light emitters The same or a difference between the two is within a predetermined range; wherein the adjustment of the spectral distribution of the first light emitter and the second light emitter includes at least the adjustment of the driving current.

In the first five steps of the two optimization processes, first, a white light emitter is selected as the first light emitter, and the white light emitter is used as the main light emitter. The main light emitter includes a large wavelength range, including at least the 400-640 nm band. . The white light is optimized to be the first near-natural light, so that the white light is as close to the natural light as possible. During the optimization process, the relative spectral power of the white light is increased as much as possible. The first near-natural light generated by the optimized white light emitter has the foregoing description. Characteristics. With reference to the first near-natural light spectrum, it can be determined that red light of 640-700 nm needs to be supplemented. Further, a second light-emitting body that emits red light is selected.

In the fifth step, after determining the first luminous body and the second luminous body, a reasonable luminous flux ratio can be selected according to the spectra of the two luminous bodies, that is, the light luminous flux between the first luminous body and the second luminous body. The ratio is called “initial luminous flux ratio” here. According to the wavelength range and spectral characteristics of the first near-natural light and red light, it can be determined that the initial luminous flux ratio is in the range of 2-10: 1. Further, through experiments, it can be further determined that the initial luminous flux ratio is in a range of 2-5: 1, and then a corresponding number of first luminous bodies and a corresponding number of second luminous bodies are lit according to a preset initial luminous flux ratio for optimization. The process of combining spectra.

The sixth step S106 includes the following sub-steps:

S11: Adjust the driving currents of the first and second light emitters, and monitor the combined spectrum in real time. When the relative spectral power of the combined spectrum reaches a predetermined range, proceed to step S12, otherwise repeat step S11;

S12: Detect the optical parameters of the combined spectrum. When the optical parameters reach a predetermined range, go to step S13, otherwise go back to step S11;

S13: adjusting the driving current of the first light emitter and / or the second light emitter so that the two driving currents tend to be the same;

S14: Adjust the luminous flux of the first luminous body and / or the luminous radiation of the second luminous body according to the change of the relative spectral power of the combined spectrum, and monitor the combined spectrum in real time. When the relative spectral power of the combined spectrum meets a predetermined range, perform Step S15, otherwise proceed to step S11;

S15: Detect the optical parameters of the combined spectrum. When the optical parameters reach a predetermined range, confirm that near natural light is obtained, proceed to step S16, otherwise proceed to step S11;

S16: Record the actual driving current of the first and second light emitters, the actual ratio of the light flux of the first and second light emitters, and the optical parameters of near-natural light.

The above steps reveal the specific implementation process of step S106. First, the corresponding number of first light emitters and second light emitters are lit according to the initial luminous flux ratio, and the light flux of the first light emitter and the After the amount of light radiation, combined spectrum and optical parameters meet the requirements, the driving current is usually inconsistent at this time. In order to achieve unified driving, subsequent adjustments are required. The adjustment process is long and complicated. First, step S13 is performed: adjusting the driving currents of the first luminous body and / or the second luminous body so that the two driving currents tend to be the same; when the currents are the same, the combined spectrum will inevitably change. Further, step S14 is performed: according to the change of the relative spectral power of the combined spectrum, further adjusting the light flux of the first luminous body and the light emitting amount of the second luminous body, and monitoring the combined spectrum in real time, the object adjusted in this step is the luminous flux or light The amount of radiation, when the relative spectral power of the combined spectrum meets a predetermined range, the optical parameter of the combined spectrum is detected, and when the optical parameter reaches a predetermined range, it is confirmed that near natural light is obtained. However, after adjusting the luminous flux, it is difficult for the relative spectral power to conform to the predetermined range, and the optical parameters are also prone to fluctuations. Therefore, steps S11 to S15 need to be repeated. In multiple adjustments, the current will gradually become consistent, and the adjustment range of the luminous flux and current will gradually decrease. Eventually, the requirements will be met with the same driving current. Near natural light.

Further, in the process of optimizing the combined spectrum, there may be the following situations: After adjusting the driving current multiple times, the spectrum or optical parameters still cannot meet the requirements. At this time, step S10 is performed:

Adjust the formula and / or concentration and / or thickness of the fluorescent film, and then proceed to step S11;

Alternatively, adjust the center wavelength of the second light emitter, and then proceed to step S11;

Alternatively, a third light-emitting body having a center wavelength different from that of the second light-emitting body is added, and then step S11 is performed.

In the actual optimization process, the adjustment of the fluorescent film, the adjustment of the red light-emitting body 222, and the adjustment of the driving current and the luminous flux repeatedly are required to obtain the final result.

Finally, the corresponding parameters need to be recorded after the commissioning, and this data is used to provide the necessary information for the production of the light source.

After the above optimization process, the white light emitting body 221 and the red light emitting body 222 are determined, and the actual ratio of the light flux of the white light emitting body 221 and the light radiation amount of the red light emitting body 222 is 2-3: 1, and the current is 20 Between -100 mA, preferably 60 mA. Preferably, 1-4 white light emitters 221 and 1-2 red light emitters 222 form a light source in series, and the power of a single light source is about 0.5W. When the color temperature is different, the actual data is slightly different. The corresponding data of several color temperatures can be determined according to the needs, and the corresponding products can be manufactured.

The above description is only the preferred embodiments of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention shall be included in the protection of the present invention. Within range.

Claims

A surgical lamp is characterized by comprising a lamp housing and a light source component; a plurality of through holes are provided on a front cover of the lamp housing, and the light source component includes a plurality of light source structures corresponding to the through holes in a one-to-one manner; Each of the light source structures includes at least one near-natural LED light source that emits near-natural light; the relative spectral power of red light in the near-natural light is greater than 0.60; and the relative spectral power of cyan light in the near-natural light is greater than 0.30; the relative spectral power of blue light in the near-natural light is less than 0.75; the color rendering index of the near-natural light is greater than 95, and the color temperature of the near-natural light is greater than 4000K.
The surgical lamp according to claim 1, wherein each said light source structure comprises a light source board, a reflector cup and a translucent cover provided in front of said light source board, each said light source board comprises a PCB board and a device One or more near-natural LED light sources on the PCB.
The surgical lamp according to claim 2, wherein each of said light source structures further comprises a heat sink provided behind said light source plate and having one end open, and said light source plate and said reflector are both provided on said heat sink Inside.
The surgical lamp according to claim 1, further comprising a dimming handle assembly connected to the light source assembly and protruding from a front cover of the lamp housing.
The surgical light according to claim 4, wherein the dimming handle assembly includes a rotating member connected to the light source assembly and protruding from the lamp cover of the front case, and a rotating member sleeved on the front end of the rotating member. The sterilizing handle, the rotating member drives each light source structure of the light source assembly to rotate about a non-central axis of the light source structure.
The surgical lamp according to claim 5, characterized in that each said light source structure is connected to a redirector, each said redirector is connected to said rotating member, and said rotating member drives each of said via a redirector The light source structure rotates about a non-center axis of the light source structure.
The surgical lamp according to claim 1, wherein each near-natural light LED light source comprises a base layer, at least one set of light emitting components disposed on the base layer, and a circuit electrically connected to the light emitting components; each The light emitting assembly includes a white light emitter and a red light emitter. The white light emitter includes a blue light chip and a fluorescent film covering the blue light chip. The red light emitter includes a red light chip. The white light emitter emits light. The white light is mixed with the red light emitted by the red light emitter, and the red light is used to compensate the red light portion of the white light that is missing from the natural spectrum to form near-natural light.
The surgical lamp according to claim 7, wherein the white light emitting body and the red light emitting body are uniformly driven by the same driving current.
The surgical lamp according to claim 7, wherein the wavelength range of the blue light chip is 457.5-480nm; and the wavelength range of the red light chip is 640-700nm.
The surgical lamp according to claim 7, wherein the blue light chip and the red light chip are flipped on the surface of the base layer, the length of the quasi-natural LED light source is less than or equal to 6 mm, and the quasi-natural LED The width of the light source is less than 3mm.
The surgical lamp according to claim 1, wherein, in the near-natural light, an explicit sign of R9 is greater than 90, and an explicit sign of R12 is greater than 80.
The surgical lamp of claim 1, wherein the relative spectral power of the 440 nm blue light in the near-natural light is less than 0.65.
The surgical lamp according to claim 12, wherein:

When the color temperature of the near-natural light is 4000K-4200K, the relative spectral power of the 440nm blue light is lower than 0.60;

When the color temperature of the near-natural light is 5500K-6000K, the relative spectral power of the 440nm blue light is lower than 0.65.
The surgical lamp according to claim 1, wherein a color temperature range of the near-natural light is 4000-6500K;

When the color temperature of the near-natural light is 4000K-4200K, the relative spectral power of 640-700nm red light is greater than 0.60;

When the color temperature of the near-natural light is 5500K-6000K, the relative spectral power of 640-700nm red light is greater than 0.50.
The surgical lamp according to claim 1, wherein the relative spectral power of the red light with a wavelength of 680-690 nm in the near-natural light is greater than 0.80;

The relative spectral power of the red light with a wavelength of 640-680 nm in the near-natural light is greater than 0.60;

The relative spectral power of the red light with a wavelength of 622-640 nm in the near-natural light is greater than 0.60.