LED shadowless lamp

Abstract

The utility model relates to the technical field of medical instruments, and provides an LED shadowless lamp which comprises a shadowless lamp base and a plurality of light-emitting units arranged on the shadowless lamp base. The light-emitting unit comprises an LED light-emitting body, a lens layer and a fluorescent layer, the lens layer covers the light-emitting surface of the LED light-emitting body, the fluorescent layer covers the lens layer, and the outer surface of the lens layer is a curved surface with an arc line. According to the LED shadowless lamp provided by the invention, the LED luminous bodies are coated with the lens layers with the arc curved surfaces, so that the light field of each LED luminous body is large and uniform, the overall lighting effect of the shadowless lamp is better, the brightness degree is uniform, and observation is more facilitated. The technical problems that in the prior art, the light field of an LED light-emitting body is not large enough and not uniform enough, so that the overall brightness uniformity is low, and certain interference is generated on the vision of a surgeon due to the phenomenon are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, more particularly to an LED shadowless lamp. BACKGROUND

[0002] The shadowless lamp is a commonly used medical device in the operating table, which can avoid the shadow caused by the blocking of the light by the doctor during use, thereby greatly improving the safety of the operation.

[0003] The shadowless lamp has high requirements for the uniformity of light in the irradiation area. The traditional LED shadowless lamp is arranged in a matrix form by LED light sources, but the light field of each light source is not large enough and is not uniform enough, resulting in low overall light uniformity. For a medical shadowless lamp, this phenomenon will interfere with the vision of the operating doctor. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the present application is to provide an LED shadowless lamp to solve the problem in the prior art that the traditional LED shadowless lamp is arranged in a matrix form by LED light sources, but the light field of each light source is not large enough and is not uniform enough, resulting in low overall light uniformity, which will interfere with the vision of the operating doctor.

[0005] Based on this, the present application provides an LED shadowless lamp, which comprises a shadowless lamp base and a plurality of light emitting units, the plurality of light emitting units being arranged on the shadowless lamp base; the light emitting unit comprises an LED chip, a lens layer and a fluorescent layer, the lens layer being wrapped around the light emitting surface of the LED chip, and the fluorescent layer being covered on the lens layer, wherein the outer surface of the lens layer is a curved surface with an arc line.

[0006] The LED shadowless lamp provided in the above-mentioned scheme comprises a first light emitting body and a second light emitting body, the first light emitting body and the second light emitting body are arranged side by side, and the colors of the light excited by the first light emitting body and the second light emitting body are different.

[0007] The LED shadowless lamp provided in the above-mentioned scheme comprises a first light emitting body and a second light emitting body, the first light emitting body and the second light emitting body are arranged side by side, and the colors of the light excited by the first light emitting body and the second light emitting body are different.

[0008] The first LED chip of the LED shadowless lamp provided in the above-mentioned scheme is a blue light chip.

[0009] The second light emitting body of the LED shadowless lamp provided in the above-mentioned scheme comprises a second LED chip, an arc surface lens layer wrapped around the four sides of the second LED chip, a diffusion layer covered on the arc surface lens layer, and a reflection layer covered on the diffusion layer.

[0010] The LED shadowless lamp provided in the scheme has the second LED chip being a green light chip.

[0011] The LED shadowless lamp provided in the scheme has the fluorescent layer coated with red fluorescent powder.

[0012] The LED shadowless lamp provided in the scheme has the curved surface including a first curved surface and a second curved surface, the first curved surface being connected with the second curved surface, and a concave valley structure being formed at the connection.

[0013] The LED shadowless lamp provided in the scheme has the curved surface further including a first vertical surface and a second vertical surface, the first vertical surface being connected with the first curved surface, and the second vertical surface being connected with the second curved surface.

[0014] The LED shadowless lamp provided in the scheme has the lens layer covering the LED light emitter without gap.

[0015] The LED shadowless lamp provided in the scheme has the lens layer covering the LED light emitter without gap. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0017] Figure 1 The structure schematic diagram of the shadowless lamp provided in an embodiment of the present application is shown in the figure.

[0018] Figure 2 The cross-sectional structure schematic diagram of the light emitting unit provided in an embodiment of the present application is shown in the figure.

[0019] Figure 3 The structure schematic diagram of the first light emitter provided in an embodiment of the present application is shown in the figure.

[0020] Figure 4 The structure schematic diagram of the second light emitter provided in an embodiment of the present application is shown in the figure.

[0021] Figure 5 The outer shape structure schematic diagram of the lens layer provided in an embodiment of the present application is shown in the figure.

[0022] Figure 6 Another cross-sectional structure diagram of a light emitting unit provided by an embodiment of the present application is shown in the figure;

[0023] Figure 7 A structure diagram of a packaging structure provided by an embodiment of the present application is shown in the figure.

[0024] In the figure, each reference numeral represents:

[0025] 1, lamp base; 2, light emitting unit; 21, lens layer; 22, fluorescent layer; 23, first light emitting body; 24, second light emitting body; 25, packaging structure; 211, first arc surface; 212, second arc surface; 213, concave valley structure; 214, first vertical surface; 215, second vertical surface; 231, first LED chip; 232, arc surface lens layer; 233, diffusion layer; 234, reflection layer; 241, second LED chip; 251, light mixing layer; 252, side wall; 2511, light reflection area; 2512, light mixing area; 25111, light reflection surface. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects of the present application clearer, the present application 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 application and not intended to limit the present application.

[0027] It should be noted that when a component is referred to as "fixed to" or "disposed on" another component, it can be directly or indirectly on the other component. When a component is referred to as "connected to" another component, it can be directly or indirectly connected to the other component. The terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or position based on the orientation or position shown in the drawings, and are only for convenience of description, and cannot be understood as a limitation on the technical solutions. The terms "first", "second" are only for the purpose of convenience of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0028] A light emitting diode (LED) is a kind of semiconductor diode, which can convert electrical energy into light energy. The working voltage of LED is low, the working current is small, the anti-impact and anti-shock performance is good, the reliability is high, the service life is long, and the intensity of light emission can be conveniently modulated by modulating the current intensity. LED backlight technology is a kind of backlight technology using light emitting diodes (LEDs) as light sources, which is widely used in medical shadowless lamps.

[0029] The shadowless lamp has high requirements on the uniformity of light in the irradiation area. The traditional LED shadowless lamp is arranged in a matrix form by LED light sources, but the light field of each light source is not large enough and not uniform enough, resulting in low overall light uniformity. For a medical shadowless lamp, this phenomenon will interfere with the vision of the surgeon.

[0030] Therefore, the embodiments of the present application provide an LED shadowless lamp, as shown in the drawings, which comprises a shadowless lamp base 1 and a plurality of light emitting units 2 arranged on the shadowless lamp base 1. Figures 1-7 The light emitting unit 2 comprises an LED chip, a lens layer and a fluorescent layer 22. The lens layer is coated on the light emitting surface of the LED chip, and the fluorescent layer 22 is coated on the lens layer. The outer surface of the lens layer is a curved surface with an arc line.

[0031] Specifically, in the present embodiment, the lens layer with an arc line curved surface is coated on the LED chip. The lens layer with an arc line curved surface can make the light field of each LED light source larger. The lens layer can refract and diffuse the light excited by the light emitting unit 2, so that the light excited by the light emitting unit 2 is more uniform. The overall illumination effect of the shadowless lamp using a plurality of such light emitting units 2 is brighter and more uniform, which is more conducive to observation.

[0032] The plurality of light emitting units 2 can be arranged at intervals. The distance between the light emitting units 2 can be reasonably set according to the light emitting effect.

[0033] Compared with the prior art, the lens layer with an arc line curved surface is coated on the LED chip, so that the light field of each LED light source is large and uniform. The overall illumination effect of the shadowless lamp is brighter and more uniform, which is more conducive to observation. The technical problem that the light field of the LED light source is not large enough and not uniform enough in the prior art, resulting in low overall light uniformity, which interferes with the vision of the surgeon, is solved.

[0034] In an embodiment, the light emitting unit 2 comprises a first light emitting body 23 and a second light emitting body 24. The first light emitting body 23 and the second light emitting body 24 are arranged side by side, and the colors of the light excited by the first light emitting body 23 and the second light emitting body 24 are different.

[0035] Specifically, in the present embodiment, the light emitting unit 2 adopts a double light source excitation scheme. The first light emitting body 23 can excite blue light. The second light emitting body 24 can excite green light. The first light emitting body 23 and the second light emitting body 24 are arranged side by side. The blue light and the green light excited by the first light emitting body 23 and the second light emitting body 24 are mixed and refracted by the externally arranged lens layer, and then transmitted outward.

[0036] The lens layer is arranged on the outer surface of the first light emitter 23 and the second light emitter 24, so that the light emitted by the blue light chip and the green light chip is diffused once, and the light emitted by the blue light chip and the green light chip is diffused more uniformly.

[0037] In an embodiment, the first light emitter 23 and the second light emitter 24 can be arranged at intervals or adjacent to each other. The distance between the first light emitter 23 and the second light emitter 24 can be set according to the light mixing effect of the lens layer of different structures.

[0038] In an embodiment, the first light emitter 23 includes a first LED chip 231, an arc lens layer 232 covering the four sides of the first LED chip 231, a diffusion layer 233 covering the arc lens layer 232, and a reflection layer 234 covering the diffusion layer 233.

[0039] Specifically, in the embodiment, the first light emitter 23 includes the first LED chip 231, the arc lens layer 232, the diffusion layer 233, and the reflection layer 234. The first LED chip 231 can be the blue light chip described above, and the arc lens layer 232 can be packaged on the first LED chip 231 by the CSP packaging technology. The shape of the arc lens layer 232 can be set reasonably according to the light diffusion effect. The arc lens layer 232 can cover the four sides of the blue light chip without gaps.

[0040] The diffusion layer 233 is arranged on the surface of the arc lens layer 232, and the reflection layer 234 is arranged on the surface of the diffusion layer 233. Part of the light emitted from the front of the blue light chip is refracted and then transmitted through the arc lens layer 232, the diffusion layer 233, and the reflection layer 234 and emitted from the front of the blue light chip; and the other part of the light is refracted back to the arc lens layer 232 by the diffusion layer 233 and the reflection layer 234 and directly emitted from the side of the blue light chip. After multiple refraction and reflection, the light emitted by the blue light chip is uniformly diffused outward.

[0041] In an embodiment, the second light emitter 24 includes a second LED chip 241, an arc lens layer 232 covering the four sides of the second LED chip 241, a diffusion layer 233 covering the arc lens layer 232, and a reflection layer 234 covering the diffusion layer 233.

[0042] Specifically, in the embodiment, the second light emitter 24 comprises a second LED chip 241, a curved lens layer 232, a diffusion layer 233 and a reflective layer 234. The second LED chip 241 can be the green light chip as described above, and the curved lens layer 232 can be packaged on the second LED chip 241 by CSP packaging technology. The shape of the curved lens layer 232 can be reasonably set according to the light diffusion effect. The curved lens layer 232 can be gaplessly wrapped around the green light chip.

[0043] The diffusion layer 233 is arranged on the surface of the curved lens layer 232, and the reflective layer 234 is arranged on the surface of the diffusion layer 233. Part of the light emitted from the front surface of the green light chip is refracted and then sequentially transmitted through the curved lens layer 232, the diffusion layer 233 and the reflective layer 234 and emitted from the front surface of the green light chip; and the other part of the light is refracted back to the curved lens layer 232 by the diffusion layer 233 and the reflective layer 234 and directly emitted from the side surface of the green light chip. Through multiple refraction and reflection, the light emitted from the green light chip is uniformly diffused outward.

[0044] In an embodiment, the fluorescent layer 22 is coated with red fluorescent powder. The fluorescent layer 22 covers the lens layer, and the white light is formed after the blue light excited by the first light emitter 23 and the green light excited by the second light emitter 24 pass through the fluorescent layer 22 coated with red fluorescent powder. Since the light emitted by the first light emitter 23 and the second light emitter 24 is uniformly diffused, the white light has more uniform brightness and smaller color difference.

[0045] In an embodiment, the outer surface of the lens layer is a curved surface with an arc line, wherein the curved surface comprises a first arc surface 211 and a second arc surface 212, the first arc surface 211 is connected with the second arc surface 212, and a concave valley structure 213 is formed at the connection. The curved surface further comprises a first vertical surface 214 and a second vertical surface 215, the first vertical surface 214 is connected with the first arc surface 211, and the second vertical surface 215 is connected with the second arc surface 212.

[0046] Specifically, in the embodiment, the outer surface of the lens layer comprises a first arc surface 211 and a second arc surface 212, the first arc surface 211 and the second arc surface 212 can be integrally formed, and the surfaces of the first arc surface 211 and the second arc surface 212 can be set as circular arcs. Therefore, the first arc surface 211 and the second arc surface 212 are connected to form a concave valley structure 213, and the first light emitter 23 and the second light emitter 24 are arranged inside the lens layer and located at the middle position of the concave valley structure 213. The lens layer forms two convex lens structures on both sides of the first light emitter 23 and the second light emitter 24, so that the beam angle of the light emitted by the first light emitter 23 and the second light emitter 24 can be further opened by the first arc surface 211 and the second arc surface 212, and the backlight module has a larger light emitting angle.

[0047] In an embodiment, the lens layer covers the LED light emitter without gaps. Specifically, in this embodiment, the lens layer covers the LED light emitter without gaps, and the first light emitter 23 and the second light emitter 24 are combined without gaps through the lens layer, so that the first light emitter 23 and the second light emitter 24 have sufficient light-emitting angles, and a half-angle of a direction can be more than 160 degrees, which is conducive to uniform diffusion of light.

[0048] The plurality of LED light emitters are the plurality of first light emitters 23 or the plurality of second light emitters 24, or a combination of the plurality of first light emitters 23 and the plurality of second light emitters 24.

[0049] In the case where the plurality of LED light emitters are a combination of the plurality of first light emitters 23 and the plurality of second light emitters 24, in order to sufficiently mix the blue and green light excited by the first light emitter 23 and the second light emitter 24, a packaging structure 25 can be arranged in the lens layer of the light-emitting unit 2, and the first light emitter 23 and the second light emitter 24 are packaged into the packaging structure 25.

[0050] The packaging structure 25 can include a light mixing layer 251 and a side wall 252, the side wall 252 is a light-tight plate, and the light excited by the first light emitter 23 and the second light emitter 24 is propagated outward from the light mixing layer 251; wherein the light mixing layer 251 includes a light reflection area 2511 and a light mixing area 2512, the light reflection area 2511 is located at the edge of the light mixing layer 251, and the light mixing area 2512 is located at the middle of the light mixing layer 251, a part of the light excited by the plurality of first light emitters 23 and the second light emitters 24 enters the light mixing area 2512, and another part of the light enters the light reflection area 2511, the light entering the light reflection area 2511 is reflected into the light mixing area 2512 to be mixed, and the mixed light is compensated by the fluorescent layer 22 to form white light.

[0051] Specifically, in this scheme, the light excited by the first light emitter 23 and the second light emitter 24 is of different colors, in one example, the first light emitter 23 can excite blue light, and the second light emitter 24 can excite green light; in another example, the first light emitter 23 can excite green light, and the second light emitter 24 can excite blue light. Similarly, other different colors of light excited by the first light emitter 23 and the second light emitter 24 can be selected according to the setting needs, which is not limited in the present application.

[0052] In an embodiment, the side wall 252 is a light-tight plate surrounding the first light emitter 23 and the second light emitter 24, and the light-tight side wall 252 is arranged to make the light of the first light emitter 23 and the second light emitter 24 enter the light mixing layer 251 and be propagated outward from the light mixing layer 251.

[0053] In one embodiment, the light mixing layer 251 includes two regions, i.e. a light reflecting region 2511 and a light mixing region 2512. The light reflecting region 2511 is located at the edge of the light mixing layer 251, and the light mixing region 2512 is located in the middle of the light mixing layer 251. The first light emitting body 23 and the second light emitting body 24 can excite different colors of light. Part of the light excited by the first light emitting body 23 and the second light emitting body 24 enters the light mixing region 2512, and the other part of the light enters the light reflecting region 2511. The light entering the light reflecting region 2511 is reflected to the light mixing region 2512 to mix. The mixed light is compensated by the fluorescent layer 22 to form white light.

[0054] Specifically, in the present embodiment, the light mixing region 2512 and the light reflecting region 2511 can be arranged on the same horizontal layer. The light reflecting region 2511 is arranged at the edge of the horizontal layer, and the light mixing region 2512 is arranged in the middle of the horizontal layer. The light reflecting region 2511 has a light reflecting surface 25111, i.e. the connecting surface of the light reflecting region 2511 and the light mixing region 2512. The light reflecting surface 25111 is arranged obliquely and faces the light mixing region 2512. The light projected from the light mixing region 2512 can be reflected by the light reflecting layer to the light mixing region 2512. The reflected light enters the light mixing region 2512 from the light reflecting surface 25111 and mixes with the light in the light mixing region 2512 again. The cross section of the light mixing region 2512 can be in the shape of a trapezoid. The lower base of the trapezoid can be the bottom surface of the light mixing layer 251 (or part of the bottom surface of the light mixing layer 251), and the upper base of the trapezoid can be part of the top surface of the light mixing layer 251. The reflecting region can be arranged along the waist line of the trapezoid, and the light mixing region 2512 and the light reflecting region 2511 form a light mixing layer 251 with a rectangular cross section.

[0055] Taking the first light emitting body 23 and the second light emitting body 24 adjacent to each other as an example, the first light emitting body 23 and the second light emitting body 24 emit light by the driving of the light emitting circuit. The light excited by the first light emitting body 23 and the second light emitting body 24 is partially mixed in the packaging structure 25. Since the side wall 252 of the packaging structure 25 is an opaque plate, the partially mixed light and the unmixed light directly or by reflection enter the light mixing layer 251. The partially mixed light is usually located in the middle part of the first light emitting body 23 and the second light emitting body 24, and the unmixed light is usually located at the edge of the first light emitting body 23 and the second light emitting body 24. The partially mixed light enters the light mixing layer 251 from the middle part of the light mixing layer 251, and the unmixed light enters the light mixing layer 251 from the edge of the light mixing layer 251. After the unmixed light enters the light mixing layer 251 from the edge, it is reflected by the light reflecting region 2511 arranged at the edge of the light mixing layer 251 to the light mixing region 2512. The partially mixed light in the light mixing region 2512 and the unmixed light are fully mixed. The mixed light is then transmitted outward through the top surface of the light mixing layer 251. In the present embodiment, the light emitted by the first light emitting body 23 and the second light emitting body 24 is fully mixed, which improves the color gamut and reduces the color difference.

[0056] In the embodiment, the first light emitter 23 and the second light emitter 24 are arranged at intervals and are encapsulated by the encapsulation structure 25. The encapsulation structure 25 includes a light mixing layer 251 and a side wall 252. The side wall 252 is a lightproof plate. The light mixing layer 251 is arranged above the first light emitter 23 and the second light emitter 24. The light excited by the first light emitter 23 and the second light emitter 24 is propagated outward from the light mixing layer 251. The encapsulation structure 25 can make the blue light and the green light fully mixed. The white light is formed by exciting the red light compensation through the fluorescent layer 22. The color gamut is improved and the color difference is reduced. The technical problem that the mutual mixing effect of the blue light chip and the green light chip is poor, the color difference is prone to occur, and the color purity of the display is not enough is solved.

[0057] In an embodiment, the light reflection area 2511 is arranged at an edge of the light mixing layer 251 and covers the light mixing area 2512.

[0058] Specifically, in the embodiment, the light reflection area 2511 is arranged at the light mixing layer 251, that is, the light reflection area 2511 and the light mixing area 2512 have an included angle, and the light reflection area 2511 covers the light mixing area 2512. The light reflection area 2511 arranged at an angle is beneficial to reflecting the light entering the edge of the light mixing layer 251. The light entering the edge of the light mixing layer 251 can be reflected into the light mixing area 2512, so that the light excited by the first light emitter 23 and the second light emitter 24 is fully mixed. The propagation path of the light in the mixing layer is very complex, including multiple reflections and refractions, etc. Covering the light reflection area 2511 on the light mixing area 2512 is beneficial to the full mixing of the light.

[0059] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A shadowless LED lamp, characterized in that, The utility model relates to a shadowless lamp base and a plurality of light emitting units arranged on the shadowless lamp base. The light emitting unit comprises an LED light emitter, a lens layer and a fluorescent layer, the lens layer is coated on the light emitting surface of the LED light emitter, and the fluorescent layer is covered on the lens layer, wherein the outer surface of the lens layer is a curved surface with an arc line. The light emitting unit comprises a first light emitter and a second light emitter, the first light emitter and the second light emitter are arranged side by side, and the colors of the light excited by the first light emitter and the second light emitter are different.

2. The LED shadow-free lamp of claim 1, wherein, The first light emitter comprises:

3. The LED shadow-free lamp of claim 2, wherein, a first LED chip; an arc surface lens layer coated around the first LED chip; a diffusion layer covered on the arc surface lens layer; a reflection layer covered on the diffusion layer. The first LED chip is a blue light chip.

4. The LED shadow-free lamp of claim 3, wherein, The second light emitter comprises:

5. The LED shadow-free lamp of claim 2, wherein, a second LED chip; an arc surface lens layer coated around the second LED chip; a diffusion layer covered on the arc surface lens layer; a reflection layer covered on the diffusion layer. The second LED chip is a green light chip.

6. The LED shadow-free lamp of claim 5, wherein, The fluorescent layer is coated with red fluorescent powder.

7. The LED shadow-free lamp of claim 1, wherein, The curved surface comprises a first arc surface and a second arc surface, the first arc surface is connected with the second arc surface, and a concave valley structure is formed at the connection.

8. The LED shadow-free lamp of claim 1, wherein, The curved surface further comprises a first vertical surface connected with the first arc surface and a second vertical surface connected with the second arc surface.

9. The LED shadow-free lamp of claim 8, wherein, The lens layer is gaplessly coated on the LED light emitter.

10. The LED shadow-free lamp of claim 1, wherein, ​

Images