JP6280406B2 - Endoscope system - Google Patents

Description

  The present invention relates to an endoscope system that illuminates a subject.

  As an endoscope system for observing the inside of a lumen such as a human esophagus or intestine, an electronic scope that illuminates and images a subject, an endoscope processor that processes an imaging signal transmitted from the electronic scope, and an endoscope An endoscope system is known that includes a monitor that displays an observation image based on an imaging signal processed by a processor. A high-intensity lamp such as a xenon lamp or a halogen lamp is used as a light source of illumination light for illuminating a subject. However, in recent years, solid-state light sources have begun to be used as light sources for endoscope systems as solid-state light sources such as light-emitting diodes (LEDs) and laser diodes (LDs) increase in brightness and life.

  For example, Patent Document 1 describes a specific configuration of an endoscope system using a solid light source. The endoscope system described in Patent Literature 1 includes an electronic scope that includes two LEDs at a distal end portion. The two LEDs are connected in parallel to the power source for the light source so that the polarities (the direction of the anode and the direction of the cathode) of the two LEDs are opposite to each other. In this configuration, the polarity of the drive current supplied to the LEDs is reversed, so that the two LEDs are alternatively driven (lighted). The LED to be driven is selected by the operator operating a switch provided in the endoscope processor.

JP2013-123585A

  In the endoscope system described in Patent Document 1, an operator must perform an LED selection operation while operating an electronic scope during an examination in a body cavity of a patient. Since the operation burden on the surgeon is large, it is pointed out that the surgeon cannot concentrate on the examination in the body cavity.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an endoscope system in which drive control of a plurality of light source units is easy in order to reduce an operation burden on an operator. It is.

  In order to achieve the above object, an endoscope system according to an embodiment of the present invention is an electronic scope having at least one image pickup device that picks up an image of a subject and generates an image pickup signal. And a light source driving unit configured to drive and control each of the plurality of light source units. The electronic scope transmits predetermined information regarding the electronic scope to the light source driving means, and the light source driving means switches the light source unit to be driven based on the predetermined information transmitted from the electronic scope.

  According to such a configuration, the driven light source unit is automatically switched based on the predetermined information received from the electronic scope. Since the surgeon does not need to perform the switching operation of the light source unit, the operation burden is reduced. The surgeon can concentrate more on the examination in the body cavity of the patient by reducing the burden of operation of the light source unit.

  Further, the predetermined information regarding the electronic scope may include information indicating an actual usage state of the electronic scope.

  The electronic scope may further include a sensor for detecting the actual usage state of the electronic scope, and a state detection unit for detecting the state of the electronic scope based on a detection result by the sensor. In this case, the electronic scope transmits information indicating the detected state of the electronic scope to the light source driving means.

  The sensor may include a direction detection sensor that detects the direction of the tip of the electronic scope.

  The electronic scope may further include a treatment instrument channel for projecting from the distal end portion through a predetermined treatment instrument. In this case, the sensor includes a treatment instrument detection sensor that detects whether or not a predetermined treatment instrument is passed through the treatment instrument channel.

  Further, the predetermined information related to the electronic scope may include unique information of the electronic scope.

  Further, the unique information of the electronic scope may include unique information of at least one image sensor.

  The endoscope system may further include image signal processing means for generating an image signal for displaying a captured image on the display device based on the imaging signal. In this case, the image signal processing unit adjusts the luminance distribution of the image signal based on the light distribution of illumination light emitted from the light source unit driven by the light source driving unit.

  The endoscope system may further include a notification unit that notifies the user of the light source unit driven by the light source driving unit among the plurality of light source units.

  According to the endoscope system of the present invention, the operation burden on the light source unit by the operator is reduced. Therefore, the surgeon can concentrate more on the examination in the body cavity of the patient.

1 is a block diagram of an endoscope system according to an embodiment of the present invention. It is a figure explaining the electronic scope concerning embodiment of this invention. It is a figure explaining the operation | movement flow of the endoscope system concerning embodiment of this invention. It is a figure explaining the example of a display of the monitor concerning the embodiment of the present invention. It is a figure explaining direction in the lumen of the electronic scope concerning the embodiment of the present invention. It is a figure explaining the drive state of the light source part displayed on the monitor concerning embodiment of this invention. It is a figure explaining the drive state of the light source part displayed on the monitor concerning embodiment of this invention. It is a figure explaining the electronic scope concerning the modification of embodiment of this invention. It is a figure explaining the drive state of the light source part displayed on the monitor concerning the modification of embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a block diagram of an endoscope system 1 according to an embodiment of the present invention. As shown in FIG. 1, the endoscope system 1 according to the present embodiment includes an electronic scope (electronic endoscope) 100, an endoscope processor 200, and a monitor 300.

  The electronic scope 100 includes a sub CPU 101, a sub memory 102, a plurality of light source units 103, an objective optical system 105, an image sensor 106, an image sensor driver 107, an orientation sensor 108, a sensor driver 109, a treatment instrument sensor 110, a sensor driver 111, and an electric Connectors 112A to 112C are provided. Each light source unit 103 includes a light emitting diode (LED) 103a and an illumination optical system 103b. Each light source 103, objective optical system 105, image sensor 106, and orientation sensor 108 are provided at the distal end portion 100 a of the flexible tube of the electronic scope 100. Although the electronic scope 100 includes eight light source units 103, a part of the electronic scope 100 is omitted in FIG. 1 in order to simplify the drawing.

  The endoscope processor 200 includes a main CPU 201, a main memory 202, a light source driver 203, an image processing circuit 204, an image memory 205, a video signal generation circuit 206, a front panel 207, and an electrical connector 208.

  The main CPU 201 controls each element constituting the endoscope system 1. Each LED 103a is driven and controlled by the light source driver 203 via the electrical connector 112A, and emits white illumination light. The light source driver 203 drives and controls each LED 103a independently. A solid light source such as a laser diode (LD) or an organic light emitting diode (OLED) may be used instead of each LED 103a.

  The illumination light emitted from each LED 103a is emitted from the distal end portion 100a of the electronic scope 100 via the corresponding illumination optical system 103b to illuminate the subject. Illumination light (reflected light) reflected by the subject forms an optical image at each pixel on the light receiving surface of the image sensor 106 via the objective optical system 105.

  The image sensor 106 accumulates an optical image formed by each pixel on the light receiving surface as a charge corresponding to the amount of light, and captures an image signal corresponding to each color of red (R), green (G), and blue (B). R imaging signal, G imaging signal, B imaging signal). Each converted image signal is subjected to processing such as AD conversion and signal amplification by the image sensor driver 107, and is transmitted to the image processing circuit 204 via the electrical connector 112B.

  The sub CPU 101 accesses the sub memory 102 and reads the unique information of the electronic scope 100. The unique information of the electronic scope 100 stored in the sub memory 102 includes unique information of the image sensor 106 and unique information of each LED 103a. The unique information of the image sensor 106 includes the number of pixels and sensitivity of the image sensor 106, the frame rate or model number that can be supported, and the like. The unique information of the LED 103a includes the number, arrangement, driving current (or driving voltage) or model number of the LED 103a. The sub CPU 101 transmits the unique information of the electronic scope 100 read from the sub memory 102 to the main CPU 201 via the electrical connector 112C.

  The main CPU 201 accesses the main memory 202 and executes various programs stored in the main memory 202, thereby performing various arithmetic processes, generation of control signals for each element constituting the endoscope system 1, and the like. The main CPU 201 controls the operation and operation timing of each circuit in the endoscope processor 200 using the generated control signal. The main CPU 201 is connected to the front panel 207. The front panel 207 is a user interface for the operator to change various settings and various parameters of the endoscope system 1. The main CPU 201 changes parameters used for processing of each circuit, control signals to be generated, and the like based on an input operation to the front panel 207 by the surgeon.

  The image processing circuit 204 performs image processing such as white balance adjustment processing, gamma correction processing, or luminance adjustment processing on the R, G, and B imaging signals received from the image sensor driver 107 and transmits the processed signals to the image memory 205. . The image memory 205 stores the imaging signal received from the image processing circuit 204 and transmits it to the video signal generation circuit 206 at a predetermined timing. The video signal generation circuit 206 converts the imaging signal received from the image memory 205 into a video signal in a predetermined format (for example, NTSC format), and transmits the video signal to the monitor 300 via the electrical connector 208. The monitor 300 displays an observation image (captured image) of the subject based on the received video signal.

  Next, the configuration of the electronic scope 100 according to the present embodiment will be described. FIG. 2 is an explanatory diagram of the electronic scope 100 according to the present embodiment. 2A shows a perspective view of the vicinity of the distal end portion 100a of the electronic scope 100, and FIG. 2B shows a front view of the distal end surface 100b of the electronic scope 100. FIG.

  As shown in FIG. 2A, the distal end portion 100a of the electronic scope 100 is connected to the bending portion 100c. The bending portion 100c is bent in a direction orthogonal to the longitudinal direction when an operator (not shown) is operated by an operator. As shown in FIG. 2B, eight light source sections 103 (illumination optical system 103b), objective optical system 105, and forceps ports 120A and 120B are arranged on the distal end surface 100b. For convenience of explanation, symbols “A” to “H” are attached to each of the eight light source units 103 arranged on the distal end surface 100b.

  A pair of forceps insertion openings into which a treatment instrument such as a forceps or a high-frequency knife is inserted is formed near the operation portion of the electronic scope 100. The treatment tool is inserted into a forceps channel formed in the electronic scope 100 through each of the pair of forceps insertion openings. The treatment tool inserted into one of the forceps channels protrudes from the distal end surface 100b to the outside of the electronic scope 100 via the forceps port 120A. The processing tool inserted into the other forceps channel is projected from the distal end surface 100b to the outside of the electronic scope 100 via the forceps port 120B.

  Each forceps channel is provided with a treatment instrument sensor 110. The treatment instrument sensor 110 is a push switch, for example, and outputs an ON signal (treatment instrument detection signal) when the treatment instrument is inserted into the forceps channel. The treatment instrument detection signal is transmitted to the sub CPU 101 via the sensor driver 111. The sub CPU 101 detects that the treatment tool has been inserted into the forceps channel by receiving the treatment tool detection signal. The sub CPU 101 notifies the main CPU 201 that the treatment instrument has been inserted into the forceps channel via the electrical connector 112C.

  The direction sensor 108 is a sensor for detecting the direction of the distal end portion 100a, and is, for example, a three-axis gyro sensor that detects and outputs angular velocities in three directions. The output from the gyro sensor is transmitted to the sub CPU 101 via the sensor driver. The sub CPU 101 calculates the direction (posture) of the distal end portion 100a by performing time integration processing on the angular velocity received from the gyro sensor. The calculated orientation (orientation information) of the distal end portion 100a is transmitted to the main CPU 201.

  In this manner, the sub CPU 101 to the main CPU 201 actually use the electronic scope 100 such as the unique information of the electronic scope 100 such as the unique information of the image sensor 106 and the LED 103a, and the treatment instrument detection signal and the orientation information of the distal end portion 100a. Is transmitted. The main CPU 201 drives and controls each light source unit 103 based on information received from the sub CPU 101.

  Next, an operation flow of drive control of the light source unit 103 in the endoscope system 1 will be described with reference to FIG.

  When the surgeon connects the electronic scope 100 to the endoscope processor 200 and then powers on the endoscope processor 200, the sub CPU 101 accesses the sub memory 102 and reads out the unique information of the electronic scope 100. The main CPU 201 receives the unique information of the electronic scope 100 from the sub CPU 101 (S101).

  When the main CPU 201 receives the unique information of the electronic scope 100, the main CPU 201 determines which light source unit 103 (LED 103a) among the plurality of light source units 103 is to be driven (lighted). Specifically, the main CPU 201 determines whether the light source drive setting (unique drive setting) corresponding to the unique information of the electronic scope 100 received from the sub CPU 101 is stored in the main memory 202 (S102).

  The main memory 202 stores a plurality of light source drive settings. Each light source drive setting corresponds to a different type of electronic scope 100 and includes control information for driving and controlling the light source unit 103. When the unique drive setting corresponding to the electronic scope 100 connected to the endoscope processor 200 is stored in the main memory 202 (S102: YES), the main CPU 201 generates a unique control signal based on the unique drive setting. Transmit to the light source driver 203. The light source driver 203 drives and controls each light source unit 103 according to the received unique control signal (S103).

  Here, the configuration of the electronic scope 100 illustrated in FIG. 2 is an example, and the number and arrangement of the light source unit 103, the objective optical system 105, and the forceps ports 120 </ b> A and 120 </ b> B vary depending on the type of the electronic scope 100. Further, the LED 103a has different driving current (or driving voltage) and luminous efficiency depending on the type. The unique information of each electronic scope 100 differs depending on these configurations.

  For example, when the electronic scope 100 with a relatively small amount of light emitted from the LED 103a of each light source unit 103 (with relatively low light emission efficiency) is connected to the endoscope processor 200, or when the imaging device 106 is relatively small and has low sensitivity. Let us consider a case where an electronic scope 100 including the above is connected to the endoscope processor 200. In this case, for example, it is necessary to increase the amount of illumination light that illuminates the subject as compared with the case where the subject is observed using another electronic scope 100. Therefore, the main CPU 201 increases the amount of illumination light by increasing the number of LEDs 103a that are simultaneously turned on or increasing the drive current supplied to the LEDs 103a. Thereby, an observation image having a brightness that is easy for the operator to view is obtained.

  On the other hand, when the unique drive setting corresponding to the electronic scope 100 connected to the endoscope processor 200 is not stored in the main memory 202 (S102: NO), the main CPU 201 uses the common control signal based on the predetermined common setting. Is transmitted to the light source driver 203. The light source driver 203 drives and controls each light source unit 103 according to the received common control signal (S104). In this case, a predetermined drive current is supplied to a predetermined LED 103a among the plurality of LEDs 103a.

  The main CPU 201 transmits a control signal (unique control signal or common control signal) to the light source driver 203 and transmits a notification signal indicating the driving state of the light source unit 103 to the monitor 300 (S105). This notification signal includes information indicating which light source unit 103 is driven among the plurality of light source units 103. The monitor 300 displays the driving state of the light source unit 103 based on the received notification signal.

  FIG. 4 shows a display example of the driving state of the light source unit 103 by the monitor 300. The monitor 300 displays a driving state 302 of the light source unit 103 based on the notification signal received from the main CPU 201 together with the observation image 301 of the subject. The displayed driving state 302 corresponds to the front view of the distal end surface 100b shown in FIG. In the driving state 302, the light source unit 103 in which the LED 103a is turned on (driven light source unit 103) is outlined, and the light source unit 103 in which the LED 103a is turned off (undriven light source unit 103) is shown in black. Has been. The surgeon can confirm the driving state of each light source unit 103 by looking at the driving state 302.

  In processing step S106, it is determined whether or not the direction of the distal end portion 100b has changed by comparing the previous direction information received from the sub CPU 101 with the current direction information. When it determines with the direction of the front-end | tip part 100a not changing (S106: NO), operation | movement of the endoscope system 1 moves to process step S108. On the other hand, when it is determined that the orientation of the distal end portion 100a has changed (S106: YES), the main CPU 201 drives and controls the light source unit 103 according to the orientation of the distal end portion 100a after the change (S107). Note that, when processing step S106 is executed for the first time, the determination is uniformly NO.

  Here, the drive control of the light source unit 103 according to the direction of the distal end portion 100a will be described. 5A and 5B show the vicinity of the distal end portion 100a of the electronic scope 100 inserted into the lumen 10 (for example, esophagus or intestine) of the subject. In FIG. 5, the normal direction of the distal end surface 100 b is indicated by a one-dot broken line N, and the imaging range (boundary) of the endoscope scope 100 is indicated by a broken line V.

  The electronic scope 100 shown in FIG. 5A is arranged such that the direction of the distal end portion 100a (the normal direction N of the distal end surface 100b) is along the longitudinal direction of the lumen inner wall 11. In such an arrangement, all the upper, lower, left, and right areas of the lumen inner wall 11 with respect to the insertion direction of the electronic scope 100 are imaged. Therefore, the light source unit 103 is driven and controlled so that all the upper, lower, left, and right regions of the lumen inner wall 11 are illuminated substantially uniformly. For example, as in the driving state 302 shown in FIG. 4, the light source unit 103 is driven and controlled so that the LED 103 a is turned on and the LED 103 a is turned off alternately. All the upper, lower, left and right areas are illuminated uniformly.

  On the other hand, in the electronic scope 100 shown in FIG. 5B, the bending portion 100 c is bent, and the direction of the distal end portion 100 a is not along the longitudinal direction of the lumen inner wall 11. In such an arrangement, the lumen inner wall 11 in the imaging range V has a region 11a where the distance between the distal end surface 100b and the lumen inner wall 11 is narrow and a region 11b where the distance is wide. Since the illuminance of the illumination light is high in the region 11a having a small interval, halation is likely to occur in the observation image in the region 11a. On the other hand, since the illuminance of the illumination light is low in the region 11b where the interval is narrow, the luminance of the observation image in the region 11b tends to be low. For this reason, the light source unit 103 is driven and controlled in accordance with the direction of the distal end portion 100a so that no halation or low luminance region is generated in the observation image.

  FIG. 6 is a diagram illustrating a driving state 302 of the light source unit 103 when the electronic scope 100 is in the arrangement illustrated in FIG. 6A to 6D show a driving state 302 when the electronic scope 100 is rotated around the axis (normal line of the distal end surface 100b) and the bending portion 100c is bent in the lumen 10. FIG. Shows changes. In each of FIGS. 6A to 6D, “TOP” indicates the rotational position around the axis of the tip 100a and the direction in which the light source 103D is disposed. Moreover, the arrow in FIG. 6 is an arrow common to each figure of Fig.6 (a)-FIG.6 (d), and represents the bending direction of the bending part 100c. This arrow is shown for convenience of explanation and is not displayed on the monitor 300.

  FIG. 6A shows a driving state 302 when the light source unit 103D is arranged vertically upward and the bending unit 100c is bent vertically downward. FIG. 6B shows a driving state 302 in the case where the light source unit 103G is arranged vertically upward and the bending unit 100c is bent vertically downward. FIG. 6C shows a driving state 302 in the case where the light source unit 103H is arranged vertically upward and the bending unit 100c is bent vertically downward. FIG. 6D shows a driving state 302 in the case where the light source unit 103A is arranged vertically upward and the bending part 100c is bent vertically downward.

  As shown in FIGS. 6A to 6D, when the bending portion 100c is bent in the direction of the arrow (vertically downward), the light source unit 103 disposed on the bending direction side is driven. In addition, the light source unit 103 disposed on the side opposite to the bending direction is driven. For this reason, the illuminance with respect to the region 11a having a small distance from the lumen inner wall 11 decreases, and the illuminance with respect to the region 11b having a large interval from the lumen inner wall 11 increases. As a result, the occurrence of halation in the region 11a is suppressed, and a decrease in luminance of the region 11b is suppressed.

  When drive control of the light source unit 103 is performed according to the direction of the distal end portion 100a, it is next detected based on the output of the treatment instrument sensor 110 whether a treatment instrument is inserted into each forceps channel of the endoscope scope 100. (S108). When no treatment tool is inserted into any forceps channel (S108: NO), the operation of the endoscope system 1 proceeds to processing step S110. On the other hand, when the treatment tool is inserted into at least one forceps channel (S108: YES), the main CPU 201 controls driving of the light source unit 103 according to the position of the forceps channel where the treatment tool is inserted (S109). .

  Here, drive control of the light source unit 103 when a treatment tool is inserted into the forceps channel will be described. FIG. 7 is a diagram illustrating a driving state 302 of the light source unit 103 when the treatment tool is inserted into either of the two forceps channels. In this case, the light source unit 103 disposed near the forceps ports 120A and 120B corresponding to each forceps channel is driven, and the other light source units 103 are not driven. As a result, the amount of illumination light around the treatment tool protruding from the forceps ports 120A and 120B increases, so that the subject is prevented from entering the shadow of the treatment tool and becoming difficult to see.

  In processing step S <b> 110, the main CPU 201 transmits a notification signal indicating the driving state of the light source unit 103 to the monitor 300. The monitor 300 displays the driving state 302 of the light source unit 103 based on the received notification signal.

  Next, the state of the driving power source of the light source unit 103 is determined (S111). When the driving power source of the light source unit 103 is turned on (S111: NO), the operation of the endoscope system 1 returns to the processing step S106. On the other hand, when the operator turns off the drive power of the light source unit 103 (or the endoscope processor 100) (S111: YES), the drive of each light source unit 103 is stopped (S112), and the drive control of the light source unit 103 is performed. The operation flow ends.

  As described above, in the present embodiment, drive control of the light source unit 103 is automatically performed according to the type of the electronic scope 100, the orientation of the distal end portion 100a, and whether or not a treatment instrument is inserted into the forceps channel. Therefore, the operator does not need to perform the lighting switching operation of the light source unit 103, and the operability of the endoscope system 1 is improved.

  The above is the description of the embodiment of the present invention. However, the present invention is not limited to the configuration of the embodiment described above, and various modifications can be made within the scope of the technical idea of the invention.

  For example, a triaxial acceleration sensor may be used as the orientation sensor 108. In this case, when the direction of the distal end portion 100a changes, the acceleration sensor detects the direction and magnitude of the acceleration of the distal end portion 100a. The main CPU 201 drives and controls the light source unit 103 based on the detected direction or magnitude of acceleration.

  Further, instead of detecting the direction of the distal end portion 100a, the bending direction and the bending degree of the bending portion 100c may be detected. In this case, the main CPU 201 drives and controls the light source unit 103 based on the detected bending direction and bending degree.

  In the present embodiment, the electronic scope 100 includes one imaging unit including the objective optical system 105 and the imaging element 106, but the present invention is not limited to this. For example, in a modification of the embodiment of the present invention, the electronic scope 100 includes a pair of imaging units including the objective optical system 105 and the imaging element 106.

  FIG. 8 is a front view of the distal end surface 100b of the electronic scope 100 in the present modification. As shown in FIG. 8, nine light source units 403 (illumination optical system 403b), a pair of imaging units (objective optical systems 405A and 405B), and a forceps port 420 are arranged on the distal end surface 100b of this modification. Yes. For convenience of explanation, symbols “A” to “I” are attached to each of the nine light source units 403 arranged on the distal end surface 100b. The surgeon selects and operates which image sensor based on which image sensor is to be displayed on the monitor 300 out of the two image sensors. The main CPU 201 drives and controls the light source unit 403 in accordance with an operation for selecting an observation image by the surgeon.

  FIG. 9A and FIG. 9B show a driving state 302 in this modification. The arrows in each of FIGS. 9A and 9B indicate the bending direction of the bending portion 100c. FIG. 9A shows a driving state 302 when the operator selects to display an observation image based on the imaging element corresponding to the objective optical system 405A on the monitor 300. FIG. In this case, among the plurality of LEDs, the light source unit 403 arranged on the bending direction side is not driven in order to prevent halation in the region 11 a where the distance from the lumen inner wall 11 is narrow. In addition, since the observation image based on the imaging element corresponding to the objective optical system 405B is not displayed on the monitor 300, the light source unit 403 around the objective optical system 405B is arranged at a position relatively distant from the objective optical system 405A. The light source unit 403 is not driven.

  FIG. 9B shows a driving state 302 when the operator selects to display an observation image based on both imaging elements on the monitor 300. In this case, the light source unit 403 arranged on the bending direction side is not driven to prevent halation in the region 11a where the distance from the lumen inner wall 11 is narrow, but the other light source units 403 are driven.

  In the present embodiment, the light source unit 103 that is driven is switched depending on the type of the electronic scope 100, the orientation of the distal end portion 100a, and the like, but the present invention is not limited to this. For example, instead of switching the light source unit 103 to be driven, all the light source units 103 may be driven and the amount of light emitted from each light source unit 103 may be adjusted. In this case, the amount of light emitted from each light source unit 103 is adjusted by changing the drive current (or drive voltage to be applied) supplied to the LED 103a of each light source unit 103.

  Further, the processing parameter (luminance adjustment parameter) of the luminance adjustment processing performed by the image processing circuit 204 may be changed according to the driving state of the light source unit 103. Specifically, the brightness adjustment parameter is changed based on the light distribution of illumination light emitted from the electronic scope 100.

  The light distribution of the illumination light emitted from each light source unit 103 is obtained by actual measurement or by calculation based on the characteristics of each illumination optical system 103b and the emitted light intensity distribution of each LED 103a. The main CPU 201 obtains the light distribution of the illumination light emitted from the electronic scope 100 by adding the light distribution of the illumination light emitted from each light source unit 103 based on the driving state of the light source unit 103. Further, the main CPU 201 determines a brightness adjustment parameter based on the light distribution. Specifically, the luminance adjustment parameter is determined so as to increase the luminance of the pixel corresponding to the light distribution direction where the light intensity of the illumination light is low and to decrease the luminance of the pixel corresponding to the light distribution direction where the light intensity is high. The determined brightness adjustment parameter is transmitted to the image processing circuit 204 and used for the brightness adjustment process. As a result, the observation image displayed on the monitor 300 approaches the brightness of the entire image uniformly, making it easier for the operator to view.

DESCRIPTION OF SYMBOLS 1 Endoscope system 10 Lumen 11 Lumen inner wall 11a, 11b Area | region 100 Electronic scope 100a Tip part 100b Tip surface 100c Curved part 101 Sub CPU
102 Sub memory 103 (103A to 103H) Light source 103a Light emitting diode (LED)
103b Illumination optical system 105 Objective optical system 106 Image sensor 107 Image sensor driver 108 Direction sensor 109 Sensor driver 110 Treatment tool sensor 111 Sensor drivers 112A to 112C Electric connectors 120A and 120B Forceps port 200 Endoscope processor 201 Main CPU
202 Main memory 203 Light source driver 204 Image processing circuit 205 Image memory 206 Video signal generation circuit 207 Front panel 208 Electric connector 300 Monitor 301 Observation image 302 Drive state 403 (403A to 403I) Light source unit 405A, 405B Objective optical system 420 Forceps port

Claims (8)

An electronic scope having a plurality of light source units and at least one image sensor that images an object and generates an imaging signal;
Light source driving means for driving and controlling each of the plurality of light source units,
The electronic scope has a treatment instrument channel for projecting from the distal end of the electronic scope through a treatment instrument;
The light source driving means drives all the light source units and adjusts the amount of light emitted from each light source unit according to whether or not the treatment tool is inserted into the treatment tool channel.
Endoscope system. The electronic scope is
A treatment instrument detection sensor for detecting whether or not the treatment instrument is passed through the treatment instrument channel;
Transmitting the detection result by the treatment instrument detection sensor to the light source driving means;
The endoscope system according to claim 1. The electronic scope transmits predetermined information about the electronic scope to the light source driving means,
The light source driving means adjusts the amount of light emitted from each light source unit based on the predetermined information.
The endoscope system according to claim 1 or 2. The electronic scope is
Including an orientation detection sensor for detecting the orientation of the tip of the electronic scope;
The detection result by the orientation detection sensor is transmitted to the light source driving means as the predetermined information.
The endoscope system according to claim 3. The predetermined information includes unique information of the electronic scope.
The endoscope system according to claim 3 or 4. The unique information of the electronic scope includes unique information of the at least one image sensor.
The endoscope system according to claim 5. Further comprising image signal processing means for generating an image signal for displaying a captured image on a display device based on the imaging signal,
The image signal processing means adjusts a luminance distribution of the image signal based on a light distribution of illumination light emitted from the plurality of light source units.
The endoscope system according to any one of claims 1 to 6. A notification means for notifying a user of a driving state of the plurality of light source units;
The endoscope system according to any one of claims 1 to 7.

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