KR101897863B1 - Light source module with multi lens - Google Patents

Light source module with multi lens Download PDF

Info

Publication number
KR101897863B1
KR101897863B1 KR1020160024167A KR20160024167A KR101897863B1 KR 101897863 B1 KR101897863 B1 KR 101897863B1 KR 1020160024167 A KR1020160024167 A KR 1020160024167A KR 20160024167 A KR20160024167 A KR 20160024167A KR 101897863 B1 KR101897863 B1 KR 101897863B1
Authority
KR
South Korea
Prior art keywords
light
optical system
light source
led chips
source module
Prior art date
Application number
KR1020160024167A
Other languages
Korean (ko)
Other versions
KR20170101530A (en
Inventor
주재영
김상유
조보현
Original Assignee
한국광기술원
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한국광기술원 filed Critical 한국광기술원
Priority to KR1020160024167A priority Critical patent/KR101897863B1/en
Publication of KR20170101530A publication Critical patent/KR20170101530A/en
Application granted granted Critical
Publication of KR101897863B1 publication Critical patent/KR101897863B1/en

Links

Images

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
    • G02B6/0073—Light emitting diode [LED]
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/02—Simple or compound lenses with non-spherical faces
    • G02B3/08—Simple or compound lenses with non-spherical faces with discontinuous faces, e.g. Fresnel lens
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
    • G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
    • G02B6/0013—Means for improving the coupling-in of light from the light source into the light guide
    • G02B6/0015—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it
    • G02B6/002—Means for improving the coupling-in of light from the light source into the light guide provided on the surface of the light guide or in the bulk of it by shaping at least a portion of the light guide, e.g. with collimating, focussing or diverging surfaces
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/02—Optical fibres with cladding with or without a coating
    • G02B6/02042—Multicore optical fibres
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • G02B6/27—Optical coupling means with polarisation selective and adjusting means
    • G02B6/2706—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters
    • G02B6/2713—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations
    • G02B6/272—Optical coupling means with polarisation selective and adjusting means as bulk elements, i.e. free space arrangements external to a light guide, e.g. polarising beam splitters cascade of polarisation selective or adjusting operations comprising polarisation means for beam splitting and combining

Abstract

An object of the present invention is to provide a light source module having multiple optical systems for providing a light source of high color rendering property by using a plurality of optical systems. To this end, At least one LED chip mounted on the substrate; A phosphor disposed on the LED chip for wavelength-converting light emitted from the LED chip; A frame provided around the LED chip; A transparent portion coupled to the frame to seal the LED chip; And an optical system disposed on at least one of an upper surface and a lower surface of the transparent portion to reduce a divergence angle of light emitted from the LED chip. Therefore, the present invention is advantageous in that light emitted from a light source is improved to increase the amount of incident light into an optical fiber by using a plurality of optical systems, thereby providing a light source of high color rendering.

Description

[0001] LIGHT SOURCE MODULE WITH MULTI LENS [0002]

The present invention relates to a light source module having multiple optical systems, and more particularly, to a light source module having multiple optical systems for providing a light source of high color rendering using a plurality of optical systems.

Generally, in hospitals, endoscopes are often used for a patient's health examination or surgery, and an optical module for capturing an object is necessarily applied to such an endoscope.

The endoscope is used to photograph and observe a narrow space such as the inside of the human body or the inside of the machine. Especially, in the medical field, the endoscope is used for the inside of the human body (Stomach, bronchus, esophagus, large intestine, small intestine, etc.).

Current endoscopes are being extended to various industrial fields such as not only in the medical field but also in observing the inside of the pipe without disassembling the precision machine or observing the abnormality inside the pipe.

BACKGROUND ART [0002] A well-known conventional endoscopic system generally includes an illuminating means for illuminating light to see the internal organs of the body or the internal surface of the machine, and a light source for receiving light reflected from the surface of the internal organs of the human body A camera including a camera chip including an imaging device that converts an image signal into an electrical signal (image signal), and an encoder that converts the image signal into an electronic signal so that the image signal can be observed through a monitor is configured at the distal end of the endoscope.

On the other hand, the illuminating means uses a lamp or an LED as an electric light emitting means, and the lamp is installed directly on the end of the endoscope or light transmitted through the optical fiber is illuminated.

FIG. 1 is a cross-sectional view showing a structure of a general endoscope light source module. The light source module 10 includes a base portion 11, an LED chip 12 installed on one side of the base portion 11, A heat dissipation fin 13 installed on the other side of the base unit 11 to absorb heat generated by the LED chip 12 to be cooled and an optical fiber 20 fixed on one side of the base unit 11, And an optical fiber fixing bracket 14 for allowing light generated from the optical fiber fixing bracket 14 to be incident.

However, since the light source module 10 according to the related art has a small cross-sectional area of the optical fiber 20 compared to the light amount of the output light, when light is emitted from the light source module 10, There is a problem that light emitted to the outside of the light source module 20 is further increased, thereby reducing the light efficiency and reducing the color rendering property of the light source module 10.

In addition, Korean Patent Registration No. 10-1038292 (entitled Laparoscopic Optical System Having Luminous Intensity Loss Prevention Function) has proposed an optical system for an endoscope having a light amount loss prevention function.

The endoscope optical system is configured to prevent light loss due to transmission of illumination light incident on a beam splitter by an optical fiber having a light-shielding portion formed at a central portion thereof and a beam splitter having a light transmission portion and a light reflection portion formed on a slope.

However, such an endoscope optical system is configured such that the light output from the light source module is directly input to the optical fiber, so that a large amount of light is lost in the process of being incident on the optical fiber having a small cross-sectional area,

Korean Patent Registration No. 10-1038292 entitled " Laparoscopic Optical System Having Luminous Intensity Loss Prevention Function "

In order to solve such problems, it is an object of the present invention to provide a light source module having multiple optical systems for providing a light source of high color rendering using a plurality of optical systems.

According to an aspect of the present invention, At least one LED chip mounted on the substrate; A phosphor disposed on the LED chip for wavelength-converting light emitted from the LED chip; A frame provided around the LED chip; A transparent portion coupled to the frame to seal the LED chip; And an optical system disposed on at least one of an upper surface and a lower surface of the transparent portion to reduce a divergence angle of light emitted from the LED chip.

Further, the phosphor according to the present invention is characterized by being a phosphor-containing glass (PIG) or a ceramic phosphor.

Further, the phosphor according to the present invention is characterized by including at least two or more photo-conversion fluorescent materials.

Further, the light transmitting portion according to the present invention is characterized by being made of any one of sapphire, glass, and quartz.

The optical system according to the present invention may further include: a first optical system provided on an upper surface of the transparent portion to condense and output the light refracted by the second optical system; And a second optical system provided on a bottom surface of the light transmitting unit to refract light so as to form a path in which a divergence angle is reduced when light emitted from the LED chip is incident.

In addition, the optical system according to the present invention is characterized by being formed of any one of a microlens array and a Fresnel lens.

The light source module according to the present invention further comprises a light distribution control optical system for refracting the light output from the optical system at a predetermined angle and converting the light to be incident on the optical fiber.

Further, the light distribution control optical system according to the present invention includes a tilted inclined surface in a direction in which light is emitted from the inside, and a third optical system for refracting the light output from the optical system at an angle to enter the optical fiber .

The present invention is advantageous in that light emitted from a light source is improved to increase the amount of incident light into an optical fiber by using a plurality of optical systems, thereby providing a light source of high color rendering.

Further, the present invention is advantageous in that the efficiency of heating can be improved by using a plurality of light sources.

1 is a sectional view showing a structure of a general endoscope light source module.
2 is a plan view showing a first embodiment of a light source module having multiple optical systems according to the present invention.
3 is a cross-sectional view showing a configuration of a light source module having multiple optical systems according to FIG.
4 is a plan view showing a second embodiment of a light source module having multiple optical systems according to the present invention.
FIG. 5 is a cross-sectional view showing a configuration of a light source module having multiple optical systems according to FIG. 4;
6 is a cross-sectional view illustrating a use state of a light source module having multiple optical systems according to the present invention.

Hereinafter, preferred embodiments of a light source module having multiple optical systems according to the present invention will be described in detail with reference to the accompanying drawings.

(Embodiment 1)

FIG. 2 is a plan view showing a first embodiment of a light source module having multiple optical systems according to the present invention, and FIG. 3 is a sectional view showing a configuration of a light source module having multiple optical systems according to FIG.

2 and 3, the light source module 100 according to the first embodiment includes a substrate 110, an LED chip 120, a phosphor 130, a frame 140, 150, and an optical system 160.

The substrate 110 has a circuit pattern formed on one side thereof, and is made of a metal PCB that facilitates heat conduction and heat generation.

The LED chip 120 is installed on the substrate 110 and outputs light having a certain wavelength range, and is preferably made of a single chip.

The phosphor 130 is provided on the LED chip 120 and is configured to perform wavelength conversion of the light emitted from the LED chip 120. When the wavelength-converted light outputs white light, for example, At least two or more phosphors including a photo-conversion phosphor (580 nm to 600 nm) and a red photo-conversion phosphor (630 nm to 650 nm) may be included.

In addition, the phosphor 130 is made of a phosphor-containing glass (PIG) or a ceramic phosphor.

A through hole is formed in the frame 140 and the LED chip 120 is disposed on the substrate 110 so that the LED chip 120 is disposed inside the frame 140.

In addition, the frame 140 is fixed to the upper portion of the transparent portion 150 so that the LED chip 120 and the phosphor 130 can be protected.

In addition, the frame 140 is made of a metal material or plastic resin material having no conductivity as an insulator.

The transparent portion 150 is disposed on the upper portion of the frame 140 to transmit light emitted from the LED chip 120 and is made of sapphire, glass or quartz.

An auxiliary phosphor (not shown) is provided on at least one of the upper surface and the lower surface of the transparent portion 150 to wavelength-convert the wavelength of the light emitted from the LED chip 120 or the light converted through the phosphor 130 Can be installed.

The optical system 160 includes a first optical system 161 and a second optical system 160. The first optical system 161 and the second optical system 160 are disposed on the upper surface and the lower surface of the transparent portion 150 to reduce the divergence angle of light emitted from the LED chip 120, 162, and allows high color rendering to be realized through mixing of light with the optical path change by the first and second optical systems 161, 162.

The first optical system 161 is disposed on the upper surface of the light projecting unit 150. When the light refracted by the second optical system 162 is incident, the first optical system 161 converts and outputs the light path so that the light is refracted and condensed. An array of microlenses 163 having a predetermined pattern, or a Fresnel lens.

The second optical system 162 is disposed on a lower surface of the transparent portion 150 and converts the light path so that a light path is formed in a direction in which a divergence angle is reduced when light emitted from the LED chip 120 is incident, And an array of microlenses 163 having a predetermined pattern or a Fresnel lens for converting the optical path.

Although the optical system 160 is disposed separately from the transparent portion 150, the optical system 160 may be integrally formed with the transparent portion 150.

An air layer may be formed between the LED chip 120 and the frame 140 or may be formed in a vacuum state so that heat generated by the operation of the LED chip 120 may cause the medium 170 So that the light can be rapidly conducted to the transparent portion 150 to improve the heat generation.

(Second Embodiment)

FIG. 4 is a plan view showing a second embodiment of a light source module having multiple optical systems according to the present invention, and FIG. 5 is a sectional view showing the configuration of a light source module having multiple optical systems according to FIG.

4 and 5, the light source module 100 'according to the second embodiment includes a substrate 110, a plurality of LED chips 120, 120a, 120b, and 120c provided on the substrate 110, A plurality of phosphors 130, 130a, 130b, and 130c disposed on the LED chips 120, 120a, 120b, and 120c for wavelength-converting light emitted from the LED chips 120, 120a, 120b, 120a, 120b, and 120c formed on the substrate 110, and a plurality of LED chips 120, 120a, 120b, and 120c disposed in the through- And a divergence angle of light emitted from the LED chips 120, 120a, 120b and 120c on the upper and lower surfaces of the transparent portion 150, And a plurality of optical systems 160 and 160a for outputting the reduced light.

In the structure of the second embodiment, the same reference numerals are used for the same constituent elements as those of the first embodiment, repetitive description of the same constituent elements is omitted, Explain.

The light source module 100 'according to the second embodiment includes a plurality of LED chips 120, 120a, 120b and 120c, a plurality of phosphors 130, 130a, 130b and 130c, a plurality of optical systems 160 and 160a, The light source module according to the first embodiment differs from the light source module according to the first embodiment.

The plurality of LED chips 120, 120a, 120b, and 120c according to the second embodiment are configured to output light in a predetermined wavelength range, and output light having the same wavelength range, or white light, a peak wavelength , Red light having a peak wavelength between 760 nm and 800 nm, and green light having a peak wavelength between 515 nm and 530 nm.

The phosphors 130, 130a, 130b and 130c are provided on the LED chips 120, 120a, 120b and 120c, respectively, and the light emitted from the LED chips 120, 120a, For example, to output white light.

For example, when the wavelength-converted light outputs white light, the phosphors 130, 130a, 130b, and 130c may emit red light-converted phosphors (580nm to 600nm) 130b, and 130c may be formed of phosphor-containing glass (PIG) or a ceramic phosphor. The phosphor may be formed of at least two or more phosphors.

The optical systems 160 and 160a are installed at positions corresponding to the LED chips 120, 120a, 120b and 120c on the upper and lower surfaces of the light transmitting unit 150, respectively, and the LED chips 120, 120a, 120b, A first optical system 161 and 161a and a second optical system 162 and 162a and configured to convert the optical path such that a divergence angle in a direction in which light emitted from the first optical system 161 and 161a, and the second optical system 162 and 162a, and the light can be mixed with light to realize a high color rendering property.

Although two optical systems 160 and 160a are described as examples for convenience of explanation, it is preferable to configure four optical systems corresponding to the four LED chips 120, 120a, 120b and 120c.

The first optical systems 161 and 161a and the second optical systems 162 and 162a are provided with an array of microlenses 163 so that the optical path can be changed.

Accordingly, the heat emission amount is reduced through the emission control using a plurality of LED chips to prevent deterioration, thereby providing high efficiency.

Next, a light source device using a light source module according to the present invention will be described with reference to FIG.

6 is a cross-sectional view illustrating a state of use of a light source module having multiple optical systems according to the present invention.

6, the light source apparatus includes a light source module 100, a light distribution control optical system 200, a bracket 300, and an optical fiber 400.

The light source module 100 includes a substrate 110, an LED chip 120, a phosphor 130, a frame 140, a transparent portion 150, and an optical system 160.

A light distribution control optical system 200 is provided at one side of the light source module 100 to refract light whose divergence angle is reduced by the optical system 160 at a predetermined angle to be incident on the optical fiber 400, 200 is provided with a bracket 300 on which an optical fiber 400 is installed.

The light distribution control optical system 200 includes a tapered inclined surface 210 tapered in a direction in which light is emitted from the inside and light incident on the optical fiber 400 by refracting the light output from the optical system 160 at a predetermined angle The third optical system 220 is configured to refract light output from the light source module 100 having a diameter larger than the diameter of the optical fiber 400 at a predetermined angle and to enter the optical fiber 400, Can be further increased.

Accordingly, the light emitted from the light source can be improved by increasing the incident amount of the light into the optical fiber by using a plurality of optical systems to provide a light source of high color rendering property, and the heat generation amount can be reduced by using a plurality of light sources to improve the efficiency

.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It can be understood that

In the course of the description of the embodiments of the present invention, the thicknesses of the lines and the sizes of the components shown in the drawings may be exaggerated for clarity and convenience of explanation, , Which may vary depending on the intention or custom of the user, the operator, and the interpretation of such terms should be based on the contents throughout this specification.

100, 100 ': light source module 110: substrate
120, 120a, 120b, 120c: LED chip 130, 130a, 130b, 130c:
140: frame 150:
160, 160a: optical system 161, 161a: first optical system
162, 162a: second optical system 163: microlens
170: medium 200: light distribution control optical system
210: slant surface 220: third optical system
300: Bracket 400: Optical fiber

Claims (8)

A substrate 110;
A plurality of LED chips 120, 120a, 120b and 120c provided on the substrate 110;
A plurality of phosphors 130 corresponding to the LED chips 120, 120a, 120b and 120c and adapted to wavelength-convert light emitted from the LED chips 120, 120a, 120b and 120c, ;
A frame 140 installed around the LED chips 120, 120a, 120b, and 120c;
A light projecting part 150 coupled with the frame 140 to seal the LED chips 120, 120a, 120b, and 120c;
The light emitting device according to the present invention may further include a light emitting unit 150 disposed on the upper surface of the light transmitting unit 150 so as to correspond to the LED chips 120, 120a, 120b, and 120c, 120a, 120b, 120c on the lower surface of the light-projecting unit 150, and the first optical system 161, 161a for converting and outputting the LED chips 120, 120a A plurality of optical systems 160 and 160a including a second optical system 162 and 162a for converting the optical path so as to be incident on the light projecting unit 150 by reducing the divergence angle of the light emitted from the light sources 120a and 120b, ; And
The heat generated by the operation of the LED chips 120, 120a, 120b, and 120c is transferred between the LED chips 120, 120a, 120b, and 120c and the frame 140 so as to be transmitted to the light- A light source module having multiple optical systems including an air layer or a medium (170) constituting a vacuum state.
The method according to claim 1,
Wherein the phosphors (130, 130a, 130b, 130c) are phosphor-containing glass (PIG) or ceramic phosphor.
3. The method of claim 2,
Wherein the phosphors (130, 130a, 130b, 130c) include at least two or more photo-conversion fluorescent materials.
The method according to claim 1,
Wherein the transparent portion (150) is made of one of sapphire, glass, and quartz.
delete The method according to claim 1,
Wherein the optical system (160, 160a) comprises any one of a microlens array and a Fresnel lens.
The method according to claim 1,
The light source module further includes a light distribution control optical system (200) for refracting the light output from the optical system (160, 160a) at a predetermined angle and converting the light to be incident on the optical fiber (400) .
8. The method of claim 7,
The light distribution control optical system 200 includes a tapered inclined surface 210 tapered in a direction in which the light is emitted from the inside and a light incident on the optical fiber 400 by refracting the light output from the optical systems 160 and 160a at a predetermined angle, And a third optical system (220) for allowing the light to pass through the first optical system.
KR1020160024167A 2016-02-29 2016-02-29 Light source module with multi lens KR101897863B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160024167A KR101897863B1 (en) 2016-02-29 2016-02-29 Light source module with multi lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160024167A KR101897863B1 (en) 2016-02-29 2016-02-29 Light source module with multi lens

Publications (2)

Publication Number Publication Date
KR20170101530A KR20170101530A (en) 2017-09-06
KR101897863B1 true KR101897863B1 (en) 2018-09-12

Family

ID=59925204

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160024167A KR101897863B1 (en) 2016-02-29 2016-02-29 Light source module with multi lens

Country Status (1)

Country Link
KR (1) KR101897863B1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101374567B1 (en) * 2012-12-11 2014-03-19 한국광기술원 Led package with variable distribution angle
JP2015090782A (en) * 2013-11-05 2015-05-11 パナソニックＩｐマネジメント株式会社 Lighting fixture
US20150364656A1 (en) * 2014-06-17 2015-12-17 Boe Technology Group Co., Ltd. Led packaging structure and method, display device and illuminating device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101038292B1 (en) 2010-04-05 2011-05-31 (주)프로옵틱스 A optical system for laparoscope has a light intensity loss prevention function
KR101516318B1 (en) * 2013-06-28 2015-05-04 (주)라이트큐브 Endoscopy lighting module improving light efficiency

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101374567B1 (en) * 2012-12-11 2014-03-19 한국광기술원 Led package with variable distribution angle
JP2015090782A (en) * 2013-11-05 2015-05-11 パナソニックＩｐマネジメント株式会社 Lighting fixture
US20150364656A1 (en) * 2014-06-17 2015-12-17 Boe Technology Group Co., Ltd. Led packaging structure and method, display device and illuminating device

Also Published As

Publication number Publication date
KR20170101530A (en) 2017-09-06

Similar Documents

Publication Publication Date Title
KR101811759B1 (en) Endoscope light source module
JP4925618B2 (en) Light source device and endoscope provided with the light source device
US8278841B2 (en) Light emitting diode light engine
JP4554865B2 (en) Borescope and endoscope light source
JP4817632B2 (en) LED fiber light source device and endoscope using the same
US20080262316A1 (en) Light Source Apparatus and Endoscope Provided with Light Source Apparatus
JP2023169279A (en) Embeddable module for high output led
US20150038787A1 (en) Endoscope
JPH11253398A (en) Electronic endoscope system
JPH11290269A (en) Solid photographing apparatus
JP7405080B2 (en) Medical system, medical light source device, and operating method of medical light source device
KR101584792B1 (en) Lighting source for endoscope
JP6009792B2 (en) Light source device
CN109310311B (en) Light source device for endoscope, and endoscope system
KR101897863B1 (en) Light source module with multi lens
KR101657887B1 (en) Endoscope light source module
JP5238123B2 (en) Fiber light source, fiber light source device, and endoscope using the same
KR101516318B1 (en) Endoscopy lighting module improving light efficiency
JP2008237916A (en) Solid-state imaging device and endoscope unit with it
JP2013507746A (en) LED module, operation method of LED module, and lighting device including LED module
WO2006105740A1 (en) Arrangment for converging visible color light and manufacturing method thereof
JP2006122251A (en) Led fiber light source device and endoscopic apparatus using the same
JP2019020442A (en) Coaxial epi-illumination device
JP2006034723A (en) Led light source equipment, and observation device and endoscope using the equipment
KR20130094267A (en) Lighting module of endoscope and cooling device thereof

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E701 Decision to grant or registration of patent right
GRNT Written decision to grant