# Patent

## Title
Endoscope circuit board assembly

## Abstract

There is provided herein a circuit board assembly for a tip section of a multi-camera endoscope comprising a camera circuit board configured to carry at least one front-pointing camera and at least one side-pointing camera, a flexible illuminator circuit board comprising at least one foldable panel and configured to carry at least one front illuminator for essentially illuminating the field of view (FOV) of the front-pointing camera and at least one side illuminator for essentially illuminating the FOV of the side-pointing camera.

## Background
REFERENCE TO CO-PENDING APPLICATIONS
Priority is claimed to U.S. Provisional Patent application Ser. No. 61/449,741, filed on Mar. 7, 2011.


FIELD OF THE INVENTION
Embodiments of the invention relate to an endoscope circuit board assembly.
BACKGROUND
Endoscopes have attained great acceptance within the medical community, since they provide a means for performing procedures with minimal patient trauma, while enabling the physician to view the internal anatomy of the patient. Over the years, numerous endoscopes have been developed and categorized according to specific applications, such as cystoscopy, colonoscopy, laparoscopy, upper GI endoscopy and others. Endoscopes may be inserted into the body's natural orifices or through an incision in the skin.
An endoscope is usually an elongated tubular shaft, rigid or flexible, having a video camera or a fiber optic lens assembly at its distal end. The shaft is connected to a handle, which sometimes includes an ocular for direct viewing. Viewing is also usually possible via an external screen. Various surgical tools may be inserted through a working channel in the endoscope for performing different surgical procedures.
Endoscopes, such as colonoscopes, that are currently being used, typically have a front camera for viewing the internal organ, such as the colon, an illuminator, a fluid injector for cleaning the camera lens and sometimes also the illuminator and a working channel for insertion of surgical tools, for example, for removing polyps found in the colon. Often, endoscopes also have fluid injectors (“jet”) for cleaning a body cavity, such as the colon, into which they are inserted. The illuminators commonly used are fiber optics which transmits light, generated remotely, to the endoscope tip section. The use of light-emitting diodes (LEDs) for illumination is also known.
One of the biggest challenges facing endoscope manufacturers is the need to miniaturize and pack a number of elements into the endoscope's tip in order to support large number of endoscope functions including operation of medical tools, imaging capabilities, field of view illumination, fluid injection, and other functions.
There is thus a need in the art for endoscopes, such as colonoscopies, that allow efficient packing of endoscope's internal parts, while maintaining endoscopes functions.
SUMMARY OF THE INVENTION
The following embodiments and aspects thereof are described and illustrated in conjunction with systems, tools and methods, which are meant to be exemplary and illustrative, not limiting in scope.
There is provided herein, according to some embodiments of the invention a circuit board assembly for a tip section of a multi-camera endoscope, the assembly comprising: a camera circuit board configured to carry at least one front-pointing camera and at least one side-pointing camera; a flexible illuminator circuit board comprising at least one foldable panel and configured to carry at least one front illuminator for essentially illuminating the field of view (FOV) of the front-pointing camera and at least one side illuminator for essentially illuminating the FOV of the side-pointing camera.
In some embodiments, the assembly further comprises one or more circuit board holders configured to support the flexible illuminator circuit board, the camera circuit board or both.
In some embodiments, the circuit board holder comprises at least one niche configured to accommodate at least one of the illuminators, and/or at least one of the cameras.
In some embodiments, the camera circuit board is a foldable camera circuit board. In some embodiments, the camera circuit board is configured to carry a front-pointing camera and two side-pointing cameras. In some embodiments, each of the side-pointing cameras is directed to opposing sides.
In some embodiments, each of the side-pointing cameras is essentially perpendicular to the front pointing camera surface.
There is further provided herein, according to some embodiments of the invention a tip section for a multi-camera endoscope, the tip section comprising: at least one front-pointing camera and at least one front illuminator associated therewith; at least one side-pointing camera and at least one side illuminator associated therewith; and a circuit board assembly comprising: a camera circuit board configured to carry at least one front-pointing camera and at least one side-pointing camera; and a flexible illuminator circuit board comprising at least one foldable panel and configured to carry at least one front illuminator and at least one side illuminator.
In some embodiments, the tip section further comprises fluid channeling component.
In some embodiments, the fluid channeling component comprises: at least one front fluid injector configured for cleaning at least one front-pointing camera and/or at least one of front illuminator; at least one fluid injector configured for cleaning at least one side-pointing camera and/or at least one of side illuminator; and a front working channel configured for insertion of a medical tool.
In some embodiments, the tip section comprises two side-pointing cameras. In some embodiments, each of two side-pointing cameras is directed to opposing sides.
In some embodiments, each of side-pointing cameras is essentially perpendicular to the front pointing camera surface. In some embodiments, at least one front and side illuminators comprises a discrete illuminator. In some embodiments, the discrete illuminator comprises a light-emitting diode (LED).
In some embodiments, at least one of the front and side illuminators is configured to emit white light. In some embodiments, at least one of the front and side illuminators is configured to emit ultraviolet light. In some embodiments, at least one of the front and side illuminators is configured to emit infrared light. In some embodiments, at least one of the front and side illuminators is configured to emit near-infrared light. In some embodiments, the front and side illuminators are configured to emit light in different wavelengths.
In some embodiments, the front-pointing camera and the side-pointing camera independently comprise a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor.
In some embodiments, the front and side fluid injectors are connected to a same fluid supply channel. In some embodiments, the endoscope is a colonoscope. In some embodiments, fields of view of the front-pointing camera and side-pointing camera are at least partially overlapping.
In some embodiments, at least one of the front and side pointing cameras comprises a lens assembly providing a field of view of 90 degrees or more.
In some embodiments, at least one of the front and side pointing cameras comprises a lens assembly providing a field of view of 120 degrees or more.
In some embodiments, at least one of the front and side pointing cameras comprises a lens assembly providing a focal length of approximately 3-100 millimeters.
In addition to the exemplary aspects and embodiments described above, further aspects and embodiments will become apparent by reference to the figures and by study of the following detailed description.



BRIEF DESCRIPTION OF THE FIGURES
Exemplary embodiments are illustrated in referenced figures. Dimensions of components and features shown in the figures are generally chosen for convenience and clarity of presentation and are not necessarily shown to scale. It is intended that the embodiments and figures disclosed herein are to be considered illustrative rather than restrictive. The figures are listed below.
FIG. 1A shows an exploded view of a tip section of an endoscope assembly according to some embodiments;
FIG. 1B shows an exploded view of a tip section of an endoscope assembly according to some embodiments;
FIG. 2A shows a perspective view of a fluid channeling component of an endoscope assembly according to some embodiments;
FIG. 2B shows a perspective view of a fluid channeling component of an endoscope assembly according to some embodiments;
FIG. 2C shows a perspective view of a fluid channeling component of an endoscope assembly according to some embodiments.
FIG. 3A shows an exploded view of a tip section of a foldable electronic circuit board according to some embodiments;
FIG. 3B shows an exploded view of a tip section of a foldable electronic circuit board according to some embodiments;
FIG. 3C shows an exploded view of a tip section of a foldable electronic circuit board according to some embodiments;
FIG. 3D shows an perspective view of a tip section of a foldable electronic circuit board according to some embodiments;
FIG. 4A shows a perspective view of a camera circuit board according to some embodiments;
FIG. 4B shows a perspective view of a camera circuit board according to some embodiments;
FIG. 4C shows a perspective view of a camera circuit board according to some embodiments;
FIG. 5 shows a perspective view of a flexible illumination circuit board according to some embodiments;
FIG. 6A shows a perspective view of a foldable electronic circuit board according to some embodiments;
FIG. 6B shows a perspective view of a foldable electronic circuit board according to some embodiments;
FIG. 6C shows a perspective view of a foldable electronic circuit board according to some embodiments;
FIG. 6D shows a perspective view of a foldable electronic circuit board according to some embodiments; and
FIG. 7 shows a perspective view of an endoscope tip section according to some embodiments.



DETAILED DESCRIPTION
Reference is now made to FIGS. 1A and 1B, which show exploded views of a tip section 200 of an endoscope assembly 100 according to an embodiment.
An aspect of some embodiments relates to an endoscope assembly 100 having a tip section 200 equipped with two or more front working channels.
It is noted that the term “endoscope” as mentioned to herein may refer particularly to a colonoscope, according to some embodiments, but is not limited only to colonoscopes. The term “endoscope” may refer to any instrument used to examine the interior of a hollow organ or cavity of the body.
Tip section 200 may be turnable by way of flexible shaft (not shown) which may also be referred to as a bending section, for example a vertebra mechanism.
According to some embodiments, tip section 200 of an endoscope may include a tip cover 300, a foldable electronic circuit board 400 and a fluid channeling component 600.
It is noted that the fluid channeling component (fluid channeling component 600) depicted in FIGS. 1A-2C is only a non limiting example of a possible fluid channeling component. Any fluid channeling components (such as fluid channeling component 900 depicted in FIG. 7) or any other fluid channel and/or tubing system(s) are also covered under the scope of this invention.
Tip cover 300 may be configured to fit over the inner parts of the tip section 200 including foldable electronic circuit board 400 and fluid channeling component 600 and to provide protection to the internal components in the inner parts.
Tip cover 300 may include a front panel 320 having a front optical assembly 256a of front-pointing camera 116a. Front optical assembly 256a may include a plurality of lenses, static or movable, which may provide a field of view of up to essentially 180 degrees. Front optical assembly 256a may provide a focal length of up to about 100 millimeters.
Optical axis of front-pointing camera 116a may be essentially directed along the long dimension of the endoscope. However, since front-pointing camera 116a is typically a wide angle camera, its field of view may include viewing directions at large angles to its optical axis. Additionally, front panel 320 may include optical windows 242a and 242b of illuminators 240a and 240b, respectively. It should be noted that number of illumination sources used for illumination of the field of view may vary.
In addition, front panel 320 may include a working channel opening 340a of a working channel 640a, and a second working channel opening 340b of a second working channel 640b which are further discussed below.
Jet channel opening 344 of jet channel 644 may also be located on front panel 320 of tip cover 300. Jet channel 644 may be configured for providing high-pressure jet of fluid such as water or saline for cleaning the walls of the body cavity.
Also located on front panel 320 of tip cover 300 is injector opening 346 of injector channel 646 having a nozzle 348 aimed at front optical assembly 256a. 
Injector channel 646 may be fed by a fluid or fluid blend such as water and/or gas and configured for injecting fluid blend (liquid and/or gas) to wash contaminants such as blood, feces and other debris from front optical assembly 256a of front-pointing camera 116a. In addition, the fluid blend may include gas, which may be used for inflating a body cavity.
Optionally, injector channel 646 may be configured for cleaning front optical assembly 256a and one, two or all of optical windows 242a and 242b. 
A sidewall 362a of tip cover 300 may include an optical assembly 256b for side-pointing camera 116b, which may be similar to front optical assembly 256a and optical windows 252a and 252b of illuminators 250a and 250b for side-pointing camera 116b. 
A sidewall 362b of tip cover 300, which may be similar to sidewall 362a and located on the opposite side of tip cover 300, may include an optical assembly 256c for side-pointing camera 116c, which may be similar to front optical assembly 256a and optical windows 262a and 262b of illuminators 260a and 260b for side-pointing camera 116b. 
Optical axis of side-pointing cameras 116b and 116c may be essentially directed perpendicular to the long dimension of the endoscope. However, since side-pointing cameras 116b and 116c are typically a wide angle camera, its field of view may include viewing directions at large angles to its optical axis.
According to some embodiments, side injector channels 666a and 666b may be configured to supply fluids for cleaning any of the tip elements (such as any optical assembly, windows, illuminators, and other elements). Side injectors opening 266a and 266b of side injector channels 666a and 666b may be located at distal end of sidewalls 362a and 362b respectively. Nozzle covers 267a and 267b may be configured to fit side injectors opening 266a and 266b. 
Additionally, nozzle covers 267a and 267b may include nozzles 268a and 268b which may be aimed at side optical assembly 256b and 256c and configured for injecting a fluid or fluid blend to wash contaminants such as blood, feces and other debris from side optical assembly 256b and 256c of side-pointing camera 116b and 116c. Optionally, nozzles 268a and 268b may be configured for cleaning side optical assembly 256b and 256c and optical windows 252a, 252b, 262b and/or 262b. 
Optionally, injector channel 646 and side injector channels 666a and 666b may be fed from same channel.
It is noted that according to some embodiments, the endoscope tip may include more than one optical window and illuminators on the side and more than one optical window and illuminators on the front.
Sidewalls 362a and 362b may have a form of an essentially flat surface, which assists in directing the cleaning fluid injected from injector channel 666a and 666b towards side optical assembly 256b and 256c and optical windows 252a, 252b, 262a and/or 262b. Lack of such flat surface may result in dripping of the cleaning fluid along the curved surface of tip section 200 of the endoscope without performing the desired cleaning action.
Reference is now made to FIGS. 2A, 2B and 2C, which show perspective views of a fluid channeling component 600 of an endoscope assembly 100 according to an embodiment.
According to some embodiments, fluid channeling component 600 may be configured as a separate component from foldable electronic circuit board 400 (FIG. 1). This configuration may be adapted to separate the fluid channels and working channels 640a and 640b, which are located in fluid channeling component 600 from the sensitive electronic and optical parts which may be located in the area of foldable electronic circuit board 400 (FIG. 1).
According to some embodiments, fluid channeling component 600 may include a proximal fluid channeling section 602 which may have an essentially cylindrical shape, a primary distal channeling section 604a and a secondary distal channeling section 604b. Primary distal fluid channeling section 604a and secondary distal channeling section 604b may partially continue the cylindrical shape of proximal fluid channeling section 602 and may have a shape of a partial cylinder (optionally elongated partial cylinder). Primary distal fluid channeling section 604a and secondary distal channeling section 604b may form solely two parallel fractions of the cylinder (along the height axis of the cylinder), wherein the third fraction of the cylinder (along the height axis of the cylinder) is missing. Primary distal fluid channeling section 604a and secondary distal channeling section 604b may be integrally formed as a unitary block with proximal fluid channeling section 602. The height of primary distal fluid channeling section 604a and secondary distal channeling section 604b may by higher than that of proximal fluid channeling section 602. In the case of primary distal fluid channeling section 604a and secondary distal channeling section 604b may have the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) and provide a space to accommodate foldable electronic circuit board 400 (FIG. 1).
Proximal fluid channeling section 602 may include integrated screw nuts 606a and 606b, which may be configured for securing tip section 200 (FIG. 1) to the endoscope shaft (not shown).
Primary distal fluid channeling section 604a and secondary distal channeling section 604b may include working channels 640a and 640b having a working channel openings 340a, 340b which may be configured for insertion of a medical (such as a surgical) tool, for example, to remove, treat and/or extract a sample of the object of interest found in the colon or its entirety for biopsy.
When endoscope assembly 100 is used within a body cavity such as a colon, the endoscope operator advances the endoscope assembly 100 while viewing images and/or video streams transmitted by front-pointing camera 116a and two side-pointing cameras 116b, 116c. When a polyp or other pathology is discovered on a wall of colon, the endoscope operator may insert one or more medical tools (not shown) through working channel 640a and/or second working channel 640b to remove, treat and/or extract a sample of the polyp or its entirety for biopsy.
Therefore, it may be beneficial if the endoscope tip section includes a second working channel, which enables the endoscope's operator to use an additional medical tool, which may be threaded through the second working channel.
A second working channel, such as second working channel 640b allows the performance of medical procedures (for example more complex procedures) using two medical tools. Second working channel 640b provides the endoscope operator a better access to the object of interest and greater flexibility with operating the medical tools while at the same time viewing the procedure by the front pointing camera 116a (FIG. 1). This substantially increases the performance of the endoscope. Moreover, the two front working channels may be used simultaneously for medical procedures. An example of such procedure may include surgery that requires stitching which can more easily be performed using two tools from two channels.
Advantageously, the configuration of foldable electronic circuit board 400 enables having a slim and compact design improves the performance of the endoscope (particularly, the colonoscope) by allowing the incorporation of additional elements to endoscope tip section 300, for example having an endoscope tip section with additional working channel, which may be used for threading a second medical tool.
Reference is now made to FIGS. 3A, 3B, 3C and 3D, which show exploded views of a foldable electronic circuit board 400 of an endoscope assembly 100 according to an embodiment.
According to some embodiments, foldable electronic circuit board 400 may have several internal parts including a camera circuit board 440, a flexible illumination circuit board 420, a bottom circuit board holder 460 and a front circuit board holder 462.
The internal parts of foldable electronic circuit board 400 may be configured to be assembled, connected or attached together into a condensed structure having a slim and compact design.
Additionally, it should be noted that the internal parts of foldable electronic circuit board 400 may be electrically connected and may be configured to share resources as electrical power and electrical signals.
Camera circuit board 440 may be configured to carry a front-pointing camera 116a and two side-pointing cameras 116b, 116c which may be similar to front-pointing camera 116a and may include a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor.
According to some embodiments, side-pointing cameras 116b and 116c may be installed such that their field of views are substantially opposing. However, different configurations and number of side-pointing cameras are possible within the general scope of the current invention.
Flexible illumination circuit board 420, which may be formed as a flexible unitary piece of a PCB layer, may include two main sections 424a and 424b, a front foldable panel 422a and four side foldable panels 422b, 422c, 422d, 422e. 
When flexible illumination circuit board 420 is in a folded configuration, front foldable panel 422a and four side foldable panels 422b, 422c, 422d, 422e may be configured to fold downwards forming a right angle with two main sections 424a and 424b. 
Front foldable panel 422a, may be configured to carry front illuminators 240a, 240b, which may be associated with front-pointing camera 116a and positioned to essentially illuminate front-pointing camera's 116a fields of view.
When front foldable panel 422a is in a folded configuration, it may form a right angle with main sections 424a and 424b such that it faces forwards, essentially at the same direction of front-pointing camera's 116a and therefore enables front illuminators 240a, 240b, to face the same direction as front-pointing camera 116a and essentially illuminate front-pointing camera's 116a field of view.
Side foldable panels 422b, 422c may be configured to carry side illuminators 250a, 250b respectively, which may be associated with side-pointing camera 116b and positioned to essentially illuminate side-pointing camera's 116b fields of view.
When side foldable panels 422b, 422c are in a folded configuration, side foldable panels 422b, 422c may be configured to form a right angle with main section 424a such that it faces sideways, essentially at the same direction of side-pointing camera 116b and therefore enables side illuminators 250a, 250b, to face the same direction as side-pointing camera 116b and essentially illuminate side-pointing camera's 116b field of view.
Side foldable panels 422d, 422e may be configured to carry side illuminators 260a, 260b respectively, which may be associated with side-pointing camera 116c and positioned to essentially illuminate side-pointing camera's 116c fields of view.
When side foldable panels 422d, 422e are in a folded configuration, side foldable panels 422d, 422e may be configured to form a right angle with main section 424b such that it faces sideways, essentially at the same direction of side-pointing camera 116c and therefore enables side illuminators 260a, 260b, to face the same direction as side-pointing camera 116c and essentially illuminate side-pointing camera's 116c field of view.
Front illuminators 240a, 240b and side illuminators 250a, 250b, 260a and 260b may optionally be discrete illuminators and may include a light-emitting diode (LED), which may be a white light LED, an infrared light LED, a near infrared light LED, an ultraviolet light LED or any other LED.
The term “discrete”, concerning discrete illuminator, may refer to an illumination source, which generates light internally—in contrast to a non-discrete illuminator, which may be, for example, a fiber optic merely transmitting light generated remotely.
Bottom circuit board holder 460 may be configured to hold and support flexible illumination circuit board 420 in its desired folded configuration and secure camera circuit board 440 including side pointing cameras 116b and 116c and their corresponding illuminators in place.
Bottom circuit board holder 460 may include a bottom portion 462 and two side portions 464a and 464b formed as a unitary piece of rigid material, such as brass, stainless steel, aluminum or any other material.
Each of side portions 464a and 464b may be perpendicularly connected to bottom portion 462 at each opposite side and may have an aperture configured to fit side pointing cameras 116b and 116c. 
Front circuit board holder 462 may be configured work in conjunction with bottom circuit board holder 460 and hold and support flexible illumination circuit board 420 in its desired folded configuration and secure camera circuit board 440 including front pointing camera 116a and its corresponding illuminator in place.
Bottom circuit board holder 460 may be formed as a unitary piece of rigid material, such as brass, stainless steel, aluminum or any other material.
The use of metal for the construction of bottom circuit board holder 460 and front circuit board holder 462 may improve electric conductivity and allow efficient heat dissipation. According to some embodiments, bottom circuit board holder 460 and front circuit board holder 462 may be used as a heat sink for some or all of the electronic components located within foldable electronic circuit board 400, particularly illuminators (such as front illuminators 240a, 240b and side illuminators 250a, 250b, 260a and 260b) and reduce overall temperature of the endoscope tip section 200 (FIG. 1). This may solve or at least mitigate a major problem of raised temperatures of endoscope tip and/or any of its components, particularly when using LED illuminators.
Reference is now made to FIGS. 4A, 4B and 4C, which show a perspective view of a camera circuit board 770 of an endoscope assembly 800 according to an embodiment.
According to some embodiments, foldable electronic circuit board 700 may have several internal parts including: a camera circuit board 770, a flexible illumination circuit board 720 and a circuit board holder 780.
The internal parts of foldable electronic circuit board 700 may be configured to be assembled, connected or attached together into a condensed structure having a slim and compact design.
Camera circuit board 770 which may be similar to camera circuit board 440 (FIG. 3), may be configured to carry a front-pointing camera 716a and two side-pointing cameras 716b, 716c which may be similar to front-pointing camera 116a (FIG. 1) and may include a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor.
According to some embodiments, side-pointing cameras 716b and 716c may be installed such that their field of views are substantially opposing. However, different configurations and number of side-pointing cameras are possible within the general scope of the current invention.
A circuit board holder 780, which is further discussed below, may be configured to hold and support camera circuit board 770.
Reference is now made to FIG. 5, which shows a perspective view of a flexible illumination circuit board 720 of an endoscope assembly 800 according to an embodiment.
Flexible illumination circuit board 720, which may be formed as a folded unitary piece of a PCB layer, may include illumination circuit board connector 726, two main sections 724a and 724b, a front foldable panel 722a and four side foldable panels 722b, 722c, 722d, 722e. 
It is noted that number of front and side foldable panels and associated number of front and side illuminators may vary.
When flexible illumination circuit board 720 is in a folded configuration, front foldable panel 722a and four side foldable panels 722b, 722c, 722d, 722e may be configured to fold downwards forming a right angle with two main sections 724a and 724b. 
Front foldable panel 722a, may be configured to carry front illuminators 740a, 740b and 740c, which may be associated with front-pointing camera 716a (FIG. 4) and positioned to essentially illuminate front-pointing camera's 716a (FIG. 4) fields of view.
When front foldable panel 722a is in a folded configuration, it may form a right angle with main sections 724a and 724b such that it faces forwards, essentially at the same direction of front-pointing camera's 716a (FIG. 4) and therefore enables front illuminators 740a, 740b and 740c, to face the same direction as front-pointing camera 716a (FIG. 4) and essentially illuminate front-pointing camera's 716a (FIG. 4) field of view.
Side foldable panels 722b, 722c may be configured to carry side illuminators 750a, 750b respectively, which may be associated with side-pointing camera 716b (FIG. 4) and positioned to essentially illuminate side-pointing camera's 716b (FIG. 4) fields of view.
When side foldable panels 722b, 722c are in a folded configuration, side foldable panels 722b, 722c may be configured to form a right angle with main section 724a such that it faces sideways, essentially at the same direction of side-pointing camera 716b (FIG. 4) and therefore enables side illuminators 750a, 750b, to face the same direction as side-pointing camera 716b (FIG. 4) and essentially illuminate side-pointing camera's 716b (FIG. 4) field of view.
Side foldable panels 722d, 722e may be configured to carry side illuminators 760a, 760b respectively, which may be associated with side-pointing camera 716c (FIG. 4) and positioned to essentially illuminate side-pointing camera's 716c fields of view.
When side foldable panels 722d, 722e are in a folded configuration, side foldable panels 722d, 722e may be configured to form a right angle with main section 724b such that it faces sideways, essentially at the same direction of side-pointing camera 716c (FIG. 4) and therefore enables side illuminators 760a, 760b, to face the same direction as side-pointing camera 716c (FIG. 4) and essentially illuminate side-pointing camera's 716c (FIG. 4) field of view.
Front illuminators 740a, 740b and side illuminators 750a, 750b, 760a and 760b may optionally be discrete illuminators and may include a light-emitting diode (LED), which may be a white light LED, an infrared light LED, a near infrared light LED, an ultraviolet light LED or any other LED.
Illumination circuit board connector 726 may be configured to connect flexible illumination circuit board 720 to a circuit board holder 780 (FIG. 6).
Reference is now made to FIGS. 6A, 6B, 6C and 6D, which show a perspective view of a foldable electronic circuit board 700 of an endoscope assembly 800 according to an embodiment.
Circuit board holder 780 may be configured to hold and support flexible illumination circuit board 720 in its desired folded configuration and secure camera circuit board 770 including side pointing cameras 716b and 716c and their corresponding illuminators in place.
Circuit board holder 780 may be formed as a unitary piece of rigid material, such as brass, stainless steel, aluminum or any other material.
The use of metal for the construction of circuit board holder 780 may improve electric conductivity and allow efficient heat dissipation. According to some embodiments, circuit board holder 780 may be used as a heat sink for some or all of the electronic components located within foldable electronic circuit board 700, particularly illuminators (such as front illuminators 740a, 740b and side illuminators 750a, 750b, 760a and 760b) and reduce overall temperature of the endoscope tip section. This may solve or at least mitigate a major problem of raised temperatures of endoscope tip and/or any of its components, particularly when using LED illuminators.
Reference is now made to FIG. 7, which shows a perspective view of a tip section 810 of an endoscope assembly 800 according to an embodiment.
According to some embodiments, fluid channeling component 900 may be configured as a separate component from foldable electronic circuit board 700 (FIG. 6). This configuration may be adapted to separate the fluid channels and working channels 940a, which is located in fluid channeling component 900 from the sensitive electronic and optical parts which may be located in the area of foldable electronic circuit board 700 (FIG. 1).
According to some embodiments, fluid channeling component 900 may include a proximal fluid channeling section 902, which may have an essentially cylindrical shape, a primary distal channeling section 904. Primary distal fluid channeling section 904 may partially continue the cylindrical shape of proximal fluid channeling section 902 and may have a shape of a partial cylinder (optionally elongated partial cylinder). Primary distal fluid channeling section 904 may form a fraction of the cylinder (along the height axis of the cylinder), wherein the other fraction of the cylinder (along the height axis of the cylinder) is missing. Primary distal fluid channeling section 904 may be integrally formed as a unitary block with proximal fluid channeling section 902. The height of primary distal fluid channeling section 904 may by higher than that of proximal fluid channeling section 902. In the case of primary distal fluid channeling section 904 may have the shape of the partial cylinder (for example, partial cylinder having only a fraction of a cylinder shape along one side of the height axis) and provide a space to accommodate foldable electronic circuit board 700 (FIG. 6).
Proximal fluid channeling section 902 may include integrated screw nuts 906b, which may be configured for securing tip section 810 to the endoscope shaft (not shown).
Primary distal fluid channeling section 904 may include working channels 940a which may be configured for insertion of a medical (such as a surgical) tool, for example, to remove, treat and/or extract a sample of the object of interest found in the colon or its entirety for biopsy.
While a number of exemplary aspects and embodiments have been discussed above, those of skill in the art will recognize certain modifications, permutations, additions and sub-combinations thereof. It is therefore intended that the following appended claims and claims hereafter introduced be interpreted to include all such modifications, permutations, additions and sub-combinations as are within their true spirit and scope.
In the description and claims of the application, each of the words “comprise” “include” and “have”, and forms thereof, are not necessarily limited to members in a list with which the words may be associated.

## Claims

1. An electronic assembly for a tip section of a multi-camera endoscope, the assembly comprising:
a front-pointing camera facing a first direction;
a first side-pointing camera facing a second direction;
a second side-pointing camera facing a third direction, wherein the second direction is opposite the third direction and wherein the second and third directions are substantially perpendicular to the first direction;
a camera circuit board configured to communicate with the front-pointing camera, first side-pointing camera, and second side-pointing camera; and
a flexible illuminator circuit board comprising
a first section comprising a first plurality of flexible panels;
a second section comprising a second plurality of flexible panels;
a third section that is attached to the first and second sections, wherein, in a first configuration, the first section, second section and third section define a first plane;
a first illuminator mounted on the third section;
a second illuminator mounted on one of said first plurality of flexible panels;
a third illuminator mounted on one of said second plurality of flexible panels wherein, upon said flexible illuminator circuit board being folded into a second, operative configuration, the first illuminator is positioned adjacent to the front-pointing camera and defines a second plane orthogonal to the first plane, the second illuminator is positioned adjacent to the first side-pointing camera and defines a third plane orthogonal to the first plane, and the third illuminator is positioned adjacent to the second side-pointing camera and defines a fourth plane orthogonal to the first plane, and wherein said second, third and fourth planes are different.

2. The electronic assembly according to claim 1, further comprising one or more circuit board holders configured to support said flexible illuminator circuit board, said camera circuit board or both.

3. The electronic assembly according to claim 2, wherein said circuit board holder comprises at least one niche configured to accommodate at least one of said illuminators or at least one of said cameras.

4. The electronic assembly according to claim 1, wherein said camera circuit board is a foldable camera circuit board.

5. The electronic assembly according to claim 1, wherein said camera circuit board is configured to carry the front-pointing camera and the two side-pointing cameras.

6. A tip section for a multi-camera endoscope, the tip section comprising the electronic assembly of claim 1 and a fluid channeling component.

7. The tip section according to claim 6, wherein said fluid channeling component comprises:
at least one front fluid injector configured for cleaning said at least one front-pointing camera or said at least one of front illuminator;
at least one side fluid injector configured for cleaning said at least one side-pointing camera or said at least one of side illuminator; and
a front working channel configured for insertion of a medical tool.

8. The tip section according to claim 7, wherein said front and side fluid injectors are connected to a same fluid supply channel.

9. The tip section according to claim 6, wherein said at least one said first illuminator, said second illuminator, and said third illuminator comprises a discrete illuminator.

10. The tip section according to claim 9, wherein said discrete illuminator comprises a light-emitting diode (LED).

11. The tip section according to claim 6, wherein at least one of said first illuminator, said second illuminator, and said third illuminator is configured to emit white light.

12. The tip section according to claim 6, wherein at least one of said first illuminator, said second illuminator, and said third illuminator is configured to emit ultraviolet light.

13. The tip section according to claim 6, wherein at least one of said first illuminator, said second illuminator, and said third illuminator is configured to emit infrared light.

14. The tip section according to claim 6, wherein at least one of said first illuminator, said second illuminator, and said third illuminator is configured to emit near-infrared light.

15. The tip section according to claim 6, wherein said first illuminator, said second illuminator, and said third illuminator are configured to emit light in different wavelengths.

16. The tip section according to claim 6, wherein said front-pointing camera and said side-pointing camera independently comprise a Charge Coupled Device (CCD) or a Complementary Metal Oxide Semiconductor (CMOS) image sensor.

17. The tip section according to claim 6, wherein said endoscope is a colonoscope.

18. The tip section according to claim 6, wherein fields of view of said front-pointing camera and side-pointing camera are at least partially overlapping.

19. The tip section according to claim 6, wherein said at least one of said front and side pointing cameras comprises a lens assembly providing a field of view of at least 90 degrees.

20. The tip section according to claim 6, wherein said at least one of said front and side pointing cameras comprises a lens assembly providing a field of view of at least 120 degrees.

21. The tip section according to claim 6, wherein said at least one of said front and side pointing cameras comprises a lens assembly providing a focal length of approximately 3-100 millimeters.