JPH11216114A - Illuminator for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen radial noises and make the whole of the size of an illuminator device small by applying plural illuminating elements of semiconductors that make illuminating light emitted, a direct current power source which controls and turn on each of the illuminating elements of semiconductors, a device for gathering radial lights from each of the illuminating elements of semiconductors around the starting point of the illumination. SOLUTION: Inside the main body 2 of the illuminator for endoscope, a illuminating unit 3 that is composed of plural white LEDs 4 which are circularly arranged on flat board-shaped substrate 5 for attaching LEDs. A white-colored single tip is used for each white LED 4, for example, a composition of a blue LED of InGaN and a fluorescent material. In the main body 2, connector 10 for light guide 9 to which the light guide 9 for endoscope is connected as it can be attached to or detached from. Inside the main body 2, lens 11 for gathering lights are arranged between the connector 10 for the light guide and the illuminating unit 3. A stable amount of light can be supplied to the light guide 9 by controlling and turning on white LED 4 by direct current power source 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an endoscope,
The present invention relates to an endoscope light source device that supplies illumination light for endoscope observation to an endoscope.

[0002]

2. Description of the Related Art Conventionally, a so-called discharge tube such as a xenon lamp or a metal halide lamp is often used as a light source of a light source device for an endoscope. Further, a halogen lamp or the like may be used.

[0003]

However, in the above-described conventional light source device, noise due to discharge of the light source lamp is easily radiated, and this noise may interfere with other devices or affect the human body. At the same time, since a circuit block (power supply, ballast, ignition circuit, etc.) for controlling lighting of the discharge tube is required, there is a problem that the entire light source device becomes large.

[0004] At present, miniaturization or energy saving of various devices is called for, but the same applies to medical equipment. In particular, for devices that handle large power, such as light source devices,
It is even more so. Therefore, in reality, there is a demand for miniaturization of the entire light source device.

[0005] Further, for example, a small light bulb (miniature light bulb) used for a flashlight or the like can be driven with low power consumption, and a battery can be used. Therefore, a large-capacity switching power supply, a ballast, an igniter, and the like, such as a discharge tube, and a heat radiation space are required, so that the entire device does not become large.

However, in the case of the above-mentioned light bulb, the size per light bulb is relatively large, and furthermore, due to problems such as luminous efficiency, sufficient brightness cannot be obtained and loss is large (heat is generated). There is a big problem. Therefore, in order to obtain sufficient brightness, it is necessary to use a large number of light bulbs, and at the same time, it is necessary to cool the light bulbs, which poses a problem in downsizing the entire light source device.

Further, in medical equipment, the electromagnetic compatibility (E
MC) has become very strict. That is, if current is interrupted internally during operation of the electric device, electromagnetic noise (noise) is generated outside. In particular, noise is large in a microcomputer-mounted device or a dimmer. For this reason, the operation of other electric devices, particularly communication devices and automatic control devices, may be interrupted, causing a malfunction, and the electromagnetic environment may be deteriorated. In particular, the spread of personal computers, the reduction in operating voltage, and the spread of microcomputer-equipped devices have tended to increase the damage in recent years. Is expected to be severe.

The present invention has been made in view of the above circumstances, and has as its object to provide an endoscope light source device capable of reducing the size of the entire device and reducing radiation noise. It is in.

[0009]

SUMMARY OF THE INVENTION The present invention provides a plurality of semiconductor light emitting elements for generating illumination light, DC power supply means for controlling the lighting of each of the semiconductor light emitting elements, and a device for emitting radiation from each of the semiconductor light emitting elements. A light source device for an endoscope, comprising: a light condensing means for converging light on an emission part of illumination light. Then, when generating the illumination light, the plurality of semiconductor light emitting elements are controlled to be turned on by the DC power supply means, and the radiated light from each semiconductor light emitting element is condensed by the condensing means to the emission part of the illumination light. It is.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a schematic configuration of a main part of an endoscope light source device 1 according to the present embodiment. An illumination light generating unit 3 for generating illumination light is provided in a main body 2 of the endoscope light source device 1.

As shown in FIG. 2, the illumination light generating unit 3 is provided with a plurality of white LEDs (semiconductor light emitting elements) 4 and a flat LED mounting board 5 for holding these white LEDs 4. Here, each white LED 4 realizes white with a single chip without using three RGB chips, for example, by combining an InGaN blue LED and a phosphor. Further, a plurality of white LEDs 4
Are arranged on the LED mounting board 5 in a state of being arranged in a substantially ring shape, for example. Note that the LED mounting board 5 is formed by a reflector that reflects light.

An LED control signal connector 6 is mounted on the LED mounting board 5. Further, a substrate holder 7 is fixed in the light source device main body 2 as shown in FIG. The LED mounting board 5 is mounted on the board holder 7 via a spacer 8.

The light source device main body 2 is provided with a light guide connecting portion (light emitting portion) 10 to which a light guide (light transmission fiber) 9 of an endoscope (not shown) is detachably connected. Then, the illumination light generating unit 3 is arranged to face the light guide connecting portion 10 so as to be spaced apart therefrom.

Further, a condensing lens (condensing means) 11 is provided between the light guide connecting portion 10 and the illumination light generating unit 3 in the light source device main body 2. The light emitted from the plurality of white LEDs 4 of the illumination light generation unit 3 is condensed on the light guide connecting portion 10 by the condensing lens 11.

A drive circuit 12 for the illumination light generating unit 3 is provided in the light source device main body 2. The drive circuit 12 of the present embodiment uses a commercial power supply. The drive circuit 12 has an inlet 13 connected to a commercial AC power supply, a noise filter 14, and a breaker 15.
, Power switch 16, AC-DC converter 17
Are serially connected in series.
Further, the AC-DC converter 17 has a constant current circuit 1
8 and control means 19 are connected. The constant current circuit 18 is connected to the LED control signal connector 6 on the LED mounting board 5.

The AC power (electric power) supplied from the inlet 13 through the noise filter 14, the breaker 15, and the power switch 16 is AC-DC
The converter 17 converts the power into DC power (electric power). Further, the output from the AC-DC converter 17 is supplied as a constant DC current to the white LED 4 on the LED mounting board 5 via the constant current circuit 18. At this time, by controlling the constant current circuit 18 by the control means 19, the white LE
Control is performed such as changing the brightness of D4 and maintaining a constant brightness. A DC power supply means 20 for controlling lighting of each white LED 4 by the AC-DC converter 17, the constant current circuit 18, and the control means 19 is formed. Note that an external DC-DC converter may be used instead of the AC-DC converter 17.

Next, the operation of the above configuration will be described.
When the endoscope light source device 1 of the present embodiment is used, a plurality of white light sources L on the LED mounting board 5 of the illumination light generating unit 3 are used.
ED4 are all turned on at the same time. And each white LED
The radiated light from 4 is condensed on the light guide connecting portion 10 by the condensing lens 11.

During use of the light source device 1, the control means 19
By controlling the constant current circuit 18 by the
Dimming control of illumination light such as changing the brightness of the ED 4 or maintaining a constant luminance is performed.

Therefore, the above configuration has the following effects. That is, in the present embodiment, since a plurality of white LEDs 4 are used as light source elements disposed in the light source device main body 2, for example, several tens of LEDs are used as in the case of using a discharge tube such as a conventional HID lamp light source. A power source having a high capacity of about several hundred W is not required, and power consumption can be reduced.

Further, the white LED 4 does not require a ballast circuit and an igniter, and at the same time, since each white LED 4 has low power consumption, the heat radiation space can be reduced as compared with the conventional case using a discharge tube. 1. The overall size can be reduced.

Also, as in the present embodiment, the white LED 4
In the illumination light generating unit 3 using the light emitting device, the emission noise level is low because the light is not emitted by discharge. Therefore, electromagnetic wave noise (noise) generated during the operation of the light source device 1 can be significantly reduced as compared with the case where a discharge tube is used as in the related art, so that the EMC level can be easily reduced. As a result, components such as a filter for reducing the EMC level can be significantly reduced, so that low cost and downsizing can be achieved.

Further, in this embodiment, since the LED mounting board 5 is formed by a reflecting plate that reflects light, of the radiated light from the plurality of white LEDs 4, the light is radiated in a direction other than the condensing lens 11. Part of the scattered light can be reflected by the LED mounting board 5 in the direction of the condenser lens 11. For this reason, it is possible to increase the light collection efficiency of the illumination light collected on the light guide connecting portion 10.

FIG. 4 shows a second embodiment of the present invention. In the present embodiment, the configuration of the endoscope light source device 1 of the first embodiment (see FIGS. 1 to 3) is changed as follows.

That is, in this embodiment, the illumination light generating unit 3 using the battery 21 in the light source device main body 2 is used.
Is provided. This drive circuit 22
Is provided with a battery voltage detection circuit 23 and a constant current circuit 24 connected to the battery 21.
Further, the alarm means 25 is provided in the battery voltage detection circuit 23.
Is connected. DC power supply means 25 for controlling lighting of each white LED 4 by the drive circuit 22.
Are formed. The other parts have the same configuration as the endoscope light source device 1 of the first embodiment,
The same parts as those of the endoscope light source device 1 according to the first embodiment are denoted by the same reference numerals, and the description thereof is omitted here.

Therefore, in the present embodiment, the light source device main body 2
Since the driving circuit 22 of the illumination light generation unit 3 using the battery 21 is provided, the size of the entire light source device 1 can be further reduced. Therefore, it is possible to provide a system of the light source device 1 which is excellent in portability and can be used as a portable light source.

FIG. 5 shows a third embodiment of the present invention. In the present embodiment, the configuration of the endoscope light source device 1 of the first embodiment (see FIGS. 1 to 3) is changed as follows.

That is, in this embodiment, the LED mounting board 5 of the illumination light generating unit 3 of the first embodiment is formed by a curved reflecting plate 31, and is used as a light source on the curved reflecting plate 31. The white LED 4 is attached. Here, the end surface of the light guide 9 connected to the light guide connecting portion 10 is disposed at substantially the center of the curved surface of the reflector 31. Then, the curved reflecting plate 31
The light condensing means for condensing the radiated light from the plurality of white LEDs 4 of the illumination light generating unit 3 on the light guide connecting portion 10 is formed. The other parts have the same configuration as the endoscope light source device 1 of the first embodiment, and a description thereof will be omitted.

In view of the above, in the above configuration, a condensing means for converging the radiated light from the plurality of white LEDs 4 of the illumination light generating unit 3 to the light guide connecting portion 10 by the curved reflecting plate 31 is formed. Therefore, the light collecting property can be improved without using the light collecting lens 11 of the first embodiment. Therefore, the condenser lens 11 of the first embodiment can be omitted from the inside of the main body 2 of the light source device 1, so that the number of components of the light source device 1 is further reduced and the entire light source device 1 is further downsized. be able to.

FIG. 6 shows a fourth embodiment of the present invention. In the present embodiment, the configuration of the endoscope light source device 1 of the first embodiment (see FIGS. 1 to 3) is changed as follows.

That is, in the present embodiment, three illumination light generating units 41, 42, and 43 having the same configuration as the illumination light generating unit 3 of the first embodiment are provided, and these are shown in FIG.
Are arranged in combination as shown in FIG. Here, the illumination light generating unit 41 at the center position is disposed at a position facing the end face of the light guide 9 of the light guide connecting portion 10 at a distance. Further, the remaining illumination light generation units 42 and 43 are arranged on both sides of the illumination light generation unit 41 at the center position, facing the end face of the light guide 9. Thereby, each of the three illumination light generation units 4
Light condensing means for condensing radiated light from the plurality of white LEDs 4 on the light guide connecting portion 10 is formed. The other parts have the same configuration as the endoscope light source device 1 of the first embodiment, and a description thereof will be omitted.

Therefore, in the present embodiment, the three illumination light generating units 41, 42 and 43 are combined as shown in FIG. 6, and the illumination light generating unit 41 at the center position is connected to the end face of the light guide 9 of the light guide connecting portion 10. By arranging the remaining illumination light generating units 42 and 43 on both sides of the centrally located illumination light generating unit 41 in a state facing the end face direction of the light guide 9,
The light condensing means for condensing the radiated light from the plurality of white LEDs 4 of each of the three illumination light generating units 41, 42, and 43 on the light guide connecting portion 10 is formed. for that reason,
A plurality of white LEDs 4 of each of the illumination light generation units 41, 42, 43 are provided by three illumination light generation units 41, 42, 43 arranged in a state facing the end face direction of the light guide 9.
Can be converged on the light guide connecting portion 10, so that the condensing lens 1 of the first embodiment can be used in the present embodiment as in the third embodiment (see FIG. 5).
The light collecting property can be improved without using 1. Therefore, the condenser lens 11 of the first embodiment can be omitted from the inside of the main body 2 of the light source device 1, so that the number of components of the light source device 1 is further reduced and the entire light source device 1 is further downsized. be able to.

FIG. 7 shows a fifth embodiment of the present invention. In the present embodiment, the configuration of the illumination light generating unit 3 of the endoscope light source device 1 of the first embodiment (see FIGS. 1 to 3) is changed as follows.

That is, in the present embodiment, the first region 51 in which the plurality of white LEDs 4 are arranged in a low density at the center of the illumination light generating unit 3 on the LED mounting board 5 is arranged. A second region 52 in which a plurality of white LEDs 4 are arranged at a higher density than the first region 51 is arranged outside the region 51. The other portions have the same configuration as the endoscope light source device of the first embodiment, and a description thereof will be omitted.

Therefore, in the present embodiment, the first portion of the central portion of the illumination light generating unit 3 on the LED
A plurality of white LEDs 4 are juxtaposed at a low density in the region 51 of the first region 51, and a plurality of white LEDs 4 are juxtaposed at a higher density in the second region 52 outside the first region 51 than in the first region 51. Therefore, the radiated light from each white LED 4 on the LED mounting board 5 can be converged on the entire surface of the light guide connecting portion 10 with good balance.

FIGS. 8 and 9 show a sixth embodiment of the present invention. In the present embodiment, the configuration of the endoscope light source device 1 of the first embodiment (see FIGS. 1 to 3) is changed as follows.

That is, in the present embodiment, a plurality of LED blocks 61, for example, a plurality of white LEDs 4 are collected and arranged on the LED mounting board 5 of the illumination light generating unit 3 of the first embodiment to form one block, for example. The number n is provided.

Further, a switching means 63 such as a multiplexer is connected to the DC power supply means 62 corresponding to the AC-DC converter 17 of the first embodiment.
The switching means 63 and each LED on the LED mounting board 5
Between the ED block 61 and the LED block 61, the same number of constant current circuits 64 and series circuits of current detection means 65 are interposed. Here, the switching means 63 and each current detection means 65 are connected to the control means 19 respectively.

In this embodiment, the DC power supply 6
The switching means 63 is controlled by the control means 19 so as to sequentially supply power to the 2 to n LED blocks 61 at predetermined intervals as shown in the operation sequence of FIG. I have. At this time, the power supply is controlled by sending an n-bit selection signal from the control means 19 to the multiplexer of the switching means 63, and the multiplexer is switched in accordance with the selection signal to supply the power.
The D block 61 is determined. The other parts are the light source device 1 for an endoscope according to the first embodiment.
, And the description is omitted here.

Therefore, in the above configuration, when the light source device 1 for an endoscope according to the present embodiment operates, each LED block 61 on the LED mounting board 5 has a predetermined size as shown in the operation sequence of FIG. The power is sequentially supplied in a pulsed manner at intervals of. Therefore, the energy supplied to each LED 4 is reduced as compared with the case where the energy is continuously supplied to the LED 4 during the operation of the light source device 1 for an endoscope. Can be achieved.

Further, since the amount of energy supplied to each LED 4 is reduced, the loss at the LED 4 can be reduced. As a result, the temperature rise at the endoscope end can be suppressed, so that safety can be improved. In addition, since the power provided to each LED 4 can be reduced, energy can be saved. Therefore, it is possible to provide the light source device 1 that can supply a stable light amount without deteriorating the performance and the life of the LED 4 even when used for a long time and without causing flickering or the like.

Further, since the LED 4 generates less heat than a halogen, xenon, metal halide lamp or the like, it is not necessary to provide a large fan or fins in the light source device 1. Therefore, the entire device can be downsized.

In the present embodiment, a plurality of, for example, n LED blocks 61 are arranged on the LED mounting board 5 to collectively arrange a plurality of white LEDs 4 to form one block. The configuration in which power is sequentially supplied to the block 61 at predetermined intervals as shown in the operation sequence of FIG.
As shown in the operation sequence of FIG. 9, power may be sequentially supplied to each of the white LEDs 4 from 2 at predetermined intervals. Furthermore, instead of the white LED 4, LEDs of each color of RGB are used, and LE of each color of RGB is used.
As shown in the operation sequence of FIG. 9 in D, power may be supplied in a pulsed manner at predetermined intervals.

FIG. 10 shows a seventh embodiment of the present invention. In this embodiment, the configuration of the endoscope light source device 1 of the sixth embodiment (see FIGS. 8 and 9) is changed as follows.

That is, in the sixth embodiment, the switching means 63 and each LED block 6 on the LED mounting board 5
1 and the same number of constant current circuits 64 as LED blocks 61
In the present embodiment, a constant current circuit 64 and a current detecting means 65 are provided between the DC power supply 62 and the switching means 63. 65 and a switching circuit 6
Each LED block 61 on the LED mounting board 5 is directly connected to the LED block 3. The other portions have the same configuration as the endoscope light source device 1 according to the sixth embodiment, and a description thereof will be omitted.

Therefore, even with the above configuration, when the light source device 1 for an endoscope of the present embodiment is in operation, each LED block 61 on the LED mounting board 5 is placed in the same manner as in the sixth embodiment. As shown in the operation sequence of No. 9, power is sequentially supplied in pulses at predetermined intervals. Therefore, the energy supplied to each LED 4 is reduced as compared with the case where the energy is continuously supplied to the LED 4 during the operation of the light source device 1 for an endoscope. Can be achieved.

Further, since the amount of energy supplied to each LED 4 is reduced, the loss at the LED 4 can be reduced. As a result, the temperature rise at the endoscope end can be suppressed, so that safety can be improved. In addition, since the power provided to each LED 4 can be reduced, energy can be saved. Therefore, it is possible to provide the light source device 1 that can supply a stable light amount without deteriorating the performance and the life of the LED 4 even when used for a long time and without causing flickering or the like.

Further, in this embodiment, in particular, one constant current circuit 6 is connected between the DC power supply 62 and the switching means 63.
4 and a current detecting means 65 are connected in series with each other, and the switching means 63 is connected to each LED block 61 on the LED mounting board 5.
Are directly connected, the number of series circuits of the constant current circuit 64 and the current detecting means 65 can be greatly reduced as compared with the sixth embodiment, and the configuration of the entire apparatus is simplified. be able to.

Further, the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention. Next, other characteristic technical matters of the present application will be additionally described as follows. (Additional Item 1) A plurality of LED elements for generating a luminous flux, DC power supply means for controlling lighting of the LED element, a reflector for reflecting a luminous flux emitted from the LED element, An endoscope comprising a condenser lens for converging a light beam emitted from an LED element and a light beam reflected from the reflector at one point, wherein the LED element is provided on the reflector. Light source device for mirror.

(Effect of Additional Item 1) LE as a light source element
Because D is used, power consumption can be reduced. Ballasts and igniters are no longer required, and the low power consumption reduces the heat radiation space, thereby reducing the size of the device. Since the battery can be used, an observation system with excellent portability can be provided. The EMC level can be easily reduced, and components such as filters can be significantly reduced. Low cost, downsizing possible.

(Additional Item 2) A plurality of LED elements for generating a light beam, DC power supply means for controlling the lighting of the LED elements, and a means for converging the light beams emitted from each of the LED elements to one point. Each of the LEs
A light source device for an endoscope, comprising: an LED element holding means for holding a D element.

(Appendix 3) A plurality of LED elements for generating a light beam, DC power supply means for controlling lighting of the LED elements, and an LED element connected between the DC power supply means and the LED elements. And a control means for controlling the DC power supply means, and each LED element or / and an LED element array block comprising a plurality of LED elements. A light source device for an endoscope, wherein energy is supplied in a pulsed manner from the DC power supply means for each time.

(Effect of Additional Item 3) LED per LED
Energy can be saved because the power supplied to the element can be reduced. LED life can be extended (product life extended). When an LED element is incorporated into the endoscope end, LE
Since the loss of the D element can be reduced, the calorific value is also reduced, and observation can be performed safely.

(Additional Item 4) In the light source device for an endoscope, a plurality of LEDs for generating a light beam and the LE
A light source device for an endoscope, comprising: an LED drive circuit for lighting D.

(Prior Art of Appendix 4) At present, there is a demand for downsizing or energy saving of the apparatus, but the same applies to medical equipment. In particular, in a device that handles a large amount of power, such as a light source device, this is even more so. Furthermore, although the regulation on EMC has become very strict, it is expected that it will be stricter in the future as the frequency of electric devices becomes higher.

(Problem to be Solved by Additional Item 4) Conventionally, a so-called discharge tube such as xenon or a metal halide lamp has been generally used as a light source device for an endoscope. However, such a light source easily emits noise due to the discharge of the lamp, and this noise may interfere with other devices or affect the human body. Since a circuit block (power supply, ballast, ignition circuit, etc.) for controlling lighting is required, the size of the device has been increased.

(Purpose of Supplementary Item 4) Reduction in size of the light source device,
And a light source device capable of reducing both radiation noise. (Effect of Supplementary Item 4) According to the present invention, since a plurality of LEDs are used as the light source of the light source device, it is possible to obtain a necessary amount of light with low power consumption, and energy saving can be realized. At the same time, unlike a conventional discharge or the like, a large-capacity switching power supply, a ballast, an ignition circuit, and the like are eliminated, so that the device can be downsized. Furthermore, since the above-mentioned power consumption is large and the circuit block in which the method is a switching circuit can be eliminated, the heat generation of the device is reduced, the heat radiation space is not required, and the radiation noise level is reduced. It is possible to do. In addition, since only the LED is turned on, there is no need to supply power from a commercial power source, and the battery can be driven. Therefore, the battery is excellent in portability and can be used as a portable light source.

(Additional Item 5) In a light source device for condensing a light beam on an end face of a fiber cable, a plurality of light emitting diodes are used as a light source lamp, and the light emitted from the light emitting diode is condensed at one point. It is assumed that it has been established.

(Prior Art of Appendix 5) Conventionally, a light source device for an endoscope uses a halogen lamp, a xenon lamp, or a metal halide lamp which generates a large amount of heat as a light source lamp.

(Problem to be Solved by Supplementary Item 5) Since a large amount of heat is generated, it is necessary to provide a large fan or fin for cooling in the apparatus. As a result, the size of the entire apparatus has increased.

(Purpose of Supplementary Item 5) The object of the invention is to reduce the size of the light source device. (Effect of Supplementary Item 5) The light emitting diode generates less heat than halogen, xenon, and metahala, so that it is not necessary to provide a large fan or fin in the light source device, so that the entire device can be downsized.

(Additional Item 6) In the light source device for an endoscope using an LED as a light source, a plurality of L
An ED element, power supply means for supplying energy to the LED element, the power supply means, a constant current supply means connected between the LED elements to supply a constant current to the LED, and a power supply means. Control means for controlling each of the LED elements and / or LEDs
A light source device for an endoscope, wherein energy is sequentially supplied in a pulsed manner from a power supply unit for each array block of elements.

(Prior Art of Appendix 6)
LE as a light source for endoscopes to reduce noise
It is considered that a plurality of Ds are used. When an LED is used as a light source, a large-capacity power supply such as a discharge lamp, a ballast, an ignition circuit, and the like can be omitted, and the light source can be reduced in size.

(Problem to be Solved by Supplementary Item 6) However, it is necessary to use a plurality of LEDs in order to obtain a necessary amount of light. However, if energy is continuously supplied to one LED, Loss increases, the service life is shortened, the product cannot be used for a long time, and there is a problem in quality.

(Purpose of Supplementary Item 6) In view of the above circumstances,
An object of the present invention is to provide a light source device capable of supplying a stable light amount without deteriorating the performance and life of the LED even when used for a long time and without causing flickering or the like.

(Effect of Supplementary Item 6) As described above,
According to the present invention, since the energy supplied to each LED is reduced, it is possible to extend the life of the LED used as a light source. Furthermore, since the amount of energy supplied per LED is reduced, the loss at the LED can be reduced, and as a result, the temperature rise at the endoscope end can be suppressed, and the safety can be improved. Becomes possible.

[0066]

According to the present invention, a plurality of semiconductor light emitting devices are provided, DC power supply means for controlling lighting of each semiconductor light emitting device, and radiated light from each semiconductor light emitting device is condensed on an emission portion of illumination light. Since the light condensing means is provided, it is possible to reduce the size of the entire device and to reduce radiation noise.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a main part showing a light source device for an endoscope according to a first embodiment of the present invention.

FIG. 2 is a plan view showing an arrangement of light emitting elements on an LED holding plate in the light source device for an endoscope according to the first embodiment.

FIG. 3 is a side view showing a state where the LED holding plate is mounted on the mounting member in the endoscope light source device according to the first embodiment;

FIG. 4 is a schematic configuration diagram of a main part showing a light source device for an endoscope according to a second embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a main part showing a light source device for an endoscope according to a third embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a main part showing a light source device for an endoscope according to a fourth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a main part of a light source device for an endoscope according to a fifth embodiment of the present invention.

FIG. 8 is a schematic configuration diagram of a main part of a light source device for an endoscope according to a sixth embodiment of the present invention.

FIG. 9 is a characteristic diagram showing an operation sequence of the endoscope light source device according to the sixth embodiment.

FIG. 10 is a schematic configuration diagram of a main part of a light source device for an endoscope according to a seventh embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 4 white LED (semiconductor light emitting element) 10 light guide connecting part (light emitting part) 11 condensing lens (condensing means) 20 DC power supply means 31 curved reflecting plate (condensing means)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Kota Ishibiki 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Yu Yu Komura 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Kogyo Co., Ltd. (72) Katsuyoshi Sasakawa, Inventor 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Kogyo Co., Ltd. (72) Kenji Harano 2-43-2, Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Naoki Sekino 2-43-2 Hatagaya, Shibuya-ku, Tokyo In-house Olympus Optical Co., Ltd. (72) Hidetoshi Saito 2-43-2, Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (72) Inventor Kenji Yoshino 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olimpa The Optical Industry Co., Ltd. (72) inventor Daming Yoshinao Tokyo, Shibuya-ku, Hatagaya 2-chome No. 43 No. 2 Olympus Optical Industry Co., Ltd. in

Claims (1)

[Claims] A plurality of semiconductor light-emitting elements for generating illumination light; a DC power supply for controlling lighting of each of the semiconductor light-emitting elements; A light source device for an endoscope, comprising: a light condensing means for emitting light.