JP2007175488A - Endoscope apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an endoscope apparatus which can alarm abnormality of light quantity during performance of automatic light quantity regulation. <P>SOLUTION: Automatic light quantity regulation by opening/closing of an aperture 31 is performed at intervals of 1/60 seconds and data of aperture opening varied matching the automatic light quantity regulation are temporarily stored in a RAM in every one second as frequency distribution data. Whether a rate of large aperture opening is larger or not as compared to a prescribed rate is judged once in 6 minutes. When the rate is larger than the prescribed rate, abnormality is judged to exist in light quantity and an alarm is displayed on a monitor 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an endoscope apparatus that performs examination, treatment, etc. of an affected area using a video scope, and in particular, abnormality detection of automatic light control processing that adjusts the brightness of a subject image displayed on a monitor to an appropriate brightness. Regarding processing.

In an electronic endoscope apparatus or the like, automatic light control processing is possible by an electronic shutter function and a light amount adjustment mechanism, and the brightness of a subject image displayed on a monitor is detected based on an image signal read from an image sensor, The aperture or the charge accumulation time (electronic shutter speed) of the image sensor is adjusted so as to maintain the brightness of the subject image at an appropriate brightness (see Patent Document 1). In addition, a self-examination system that diagnoses whether or not there is a malfunction in the electronic endoscope device is built in. When the power is turned on, the circuit is checked for errors, and if there is an abnormality, a warning message etc. is displayed. (See Patent Document 2).
JP 2003-305005 A JP 2004-261612 A

  If the self-diagnosis check is only performed when the power is turned on, even if the light intensity of the illumination light or the light adjustment mechanism is abnormal during the automatic light control process (the lamp light intensity decreases, the scope tip And the abnormality cannot be detected.

  The electronic endoscope apparatus, endoscope apparatus, endoscopic self-diagnosis apparatus, and self-diagnosis method of the present invention detect abnormalities and defects related to the amount of light using the automatic light control processing function, and notify the operator. Is possible.

  An electronic endoscope apparatus according to the present invention is an electronic endoscope apparatus that includes a video scope having an image sensor and a processor to which the video scope is connected, and that emits illumination light for illuminating a subject. And a light control means for adjusting the brightness of a subject image displayed based on an image signal read from the image sensor by adjusting the amount of illumination light, and during the automatic light control processing by the light control means A light amount detecting means for detecting a light amount of light, an abnormality detecting means for detecting whether or not the light amount of the illumination light is abnormal based on the detected light amount of the illumination light, and an abnormality detected by the abnormality detecting means. An informing means for informing is provided. For example, the light amount of the subject is detected during the automatic light control process by detecting the aperture of the diaphragm, the amount of current to the light source, the electronic shutter speed, and the like, and it is possible to notify the light amount abnormality in real time.

  In order to efficiently detect the light amount of the illumination light and determine an abnormality, the light amount detection means should periodically detect the light amount of the illumination light. For example, it may be detected at intervals of several seconds.

  Regarding the detection of an abnormality, the abnormality detection means may determine that an abnormality has occurred when, for example, the state in which the light amount of illumination light exceeds the maximum light amount or the light amount close to the maximum light amount continues for a predetermined period. For example, when the amount of light that exceeds 70% of the maximum amount of light continues, it may be determined that there is an abnormality. Specifically, for example, the light amount detection unit regularly detects the light amount of the illumination light in order to obtain the distribution data of the light amount of the illumination light, and the abnormality detection unit detects the light amount of the entire illumination light detected. When the ratio of the amount of relatively large illumination light exceeds a predetermined ratio, it is determined to be abnormal. It may be determined that the ratio of the frequency number (number of detections) of light quantity exceeding 70% of the maximum light quantity in the entire distribution data exceeds 60%, 70%, or more. Alternatively, it may be determined that there is an abnormality when the light quantity is small, for example, when the frequency number that is 20 to 40% of the maximum light quantity exceeds 30% or 40%.

  In order to prevent the waste of detecting the amount of light when the videoscope is held before use, the anomaly detection means is practically used for actual endoscopic work such as treatment, surgery, examination, etc. It is desirable to detect an abnormality during the period.

  An endoscopic self-diagnosis device according to the present invention includes a light amount detecting means for detecting a light amount of illumination light and an illumination light to be detected during an automatic light adjustment process in which the light amount of illumination light for illuminating a subject is adjusted. An abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the amount of illumination light, and a notifying means for notifying the abnormality detected by the abnormality detecting means are provided.

  The endoscopic self-diagnosis method of the present invention detects the light amount of illumination light during the automatic light control processing in which the light amount of illumination light for illuminating a subject is adjusted, and based on the detected light amount of illumination light. Thus, it is detected whether the amount of illumination light is abnormal, and the detected abnormality is notified.

  The program of the present invention is based on the light amount detecting means for detecting the light amount of the illumination light and the detected light amount of the illumination light during the automatic light control processing in which the light amount of the illumination light for illuminating the subject is adjusted. An abnormality detecting means for detecting whether or not the amount of illumination light is abnormal and an informing means for notifying an abnormality detected by the abnormality detecting means are functioned.

  The electronic endoscope apparatus according to the present invention is read from an image sensor by adjusting a light source that emits illumination light for illuminating a subject, a diaphragm that adjusts the amount of illumination light, and a diaphragm aperture. A dimming means for adjusting the brightness of a subject image displayed based on an image signal, an aperture opening detecting means for detecting an aperture opening degree during automatic dimming processing by the dimming means, and an aperture opening detected An abnormality detecting means for detecting whether or not the amount of illumination light is abnormal based on the degree, and an informing means for informing the detected abnormality. For example, if the aperture is excessively large, the amount of illumination light may be reduced due to dirt on the scope tip and a decrease in the amount of light from the lamp, which hinders observation. In addition, when the aperture is too small, there is a possibility that a problem has occurred in the automatic light control processing function. Alternatively, in this case, there is a possibility that the light amount of the lamp is extremely large, and there is a risk that when the light amount setting is switched to manual (not automatic dimming), the light amount of the lamp is excessive and burns may occur. In the present invention, an abnormality is detected based on the aperture opening measured in real time and is notified to the operator.

  For example, the abnormality detection means determines that the state is abnormal when a state where the throttle opening is large continues for a certain period. When the light intensity of the illumination light decreases due to contamination at the distal end of the scope or a decrease in the light intensity of the lamp, automatic light control processing with an excessively large aperture is continued. Alternatively, when the state where the aperture is small is continued for a certain period, it is desirable to determine that there is an abnormality because the light amount of the lamp may be unexpectedly large. If there is too much light from the lamp, there is a risk of burns.

  As a configuration for detecting that the state where the throttle opening is large continues for a certain period, for example, the ratio of the large throttle opening in the series of throttle openings detected by the abnormality detection means periodically within a predetermined period. Can be determined to be abnormal if the ratio exceeds a considerable ratio (80, 90%, etc.). For example, a range of about 1/10 on the maximum opening side of the range that the throttle opening can take is determined as a large throttle opening. In this case, the throttle opening detection means detects the throttle opening at a constant time interval and stores it in the memory, and the abnormality detection means sets the series of throttle opening amounts stored at a predetermined time interval longer than the fixed time interval. Based on this, an abnormality may be detected.

  In order to detect an abnormality only when the endoscope is actually used, it is preferable to provide use detecting means for determining whether or not the video scope is used for endoscope operation. In this case, the aperture opening detection means detects the aperture opening only when the video scope is used.

  The endoscopic self-diagnosis device of the present invention adjusts the aperture of a diaphragm that adjusts illumination light for illuminating a subject, whereby an object image displayed based on an image signal read out from an image sensor is adjusted. During automatic dimming processing by the dimming means for adjusting the brightness, whether or not there is an abnormality with respect to the amount of illumination light based on the aperture opening detecting means for detecting the aperture opening and the detected aperture opening An abnormality detecting means for detecting the abnormality and an informing means for informing the abnormality are provided.

  The endoscopic self-diagnosis method of the present invention adjusts the aperture of a diaphragm that adjusts illumination light for illuminating a subject, thereby adjusting a subject image displayed based on an image signal read from an image sensor. During automatic dimming processing by the dimming means that adjusts the brightness, the aperture opening is detected, and based on the detected aperture opening, it is detected whether there is an abnormality in the amount of illumination light. It is characterized by notifying.

  The program of the present invention adjusts the brightness of a subject image displayed based on an image signal read from an image sensor by adjusting the aperture of a diaphragm that adjusts illumination light for illuminating the subject. During automatic dimming processing by the light means, an aperture detection means for detecting the aperture opening, and an abnormality detection means for detecting whether there is an abnormality in the amount of illumination light based on the detected aperture opening And a notifying means for notifying abnormality is functioned.

  An electronic endoscope apparatus according to the present invention adjusts an amount of current (current value), a light source that emits illumination light for illuminating a subject, a light source driving unit that supplies current to the light source to drive the light source. Thus, a dimming unit that adjusts the brightness of a subject image displayed based on an image signal read from the image sensor, a current amount detection unit that detects a current amount during automatic dimming processing by the dimming unit, and An abnormality detection unit that detects whether or not the amount of illumination light is abnormal based on the detected amount of current, and a notification unit that notifies the detected abnormality. For example, when the amount of current is excessively large, there is a possibility that the amount of illumination light may be reduced due to contamination at the distal end of the scope or a reduction in the amount of light from the lamp, which hinders observation. Moreover, when the amount of current is excessively small, there is a possibility that a problem has occurred in the automatic light control processing function. Alternatively, in this case, there is a possibility that the light amount of the lamp is extremely large, and there is a risk that when the light amount setting is switched to manual (not automatic dimming), the light amount of the lamp is excessive and burns may occur. In the present invention, an abnormality is detected based on the amount of current measured in real time and notified to the operator.

  For example, the abnormality detection unit determines that the state is abnormal when a large amount of current continues for a certain period. When the light intensity of the illumination light decreases due to contamination at the distal end of the scope or a decrease in the light intensity of the lamp, automatic light control processing with an excessively large current amount continues. Alternatively, when the state where the amount of current is small continues for a certain period, it is desirable to determine that the lamp is abnormal because the light amount of the lamp may be unexpectedly large. As a result, there is no risk of burns due to too much light from the lamp.

  As a configuration for detecting that a large amount of current continues for a certain period of time, for example, the abnormality detection means has a large proportion of a large amount of current in a series of current amounts periodically detected within a predetermined period. What is necessary is just to judge that it is abnormal when the ratio (80, 90%, etc.) is exceeded. For example, a range of 90% or more of the maximum current value is defined as a large amount of current out of the possible range of the amount of current. In this case, the current amount detection means detects the current amount at a constant time interval and stores it in the memory, and the abnormality detection means detects an abnormality based on a series of current amounts stored at a predetermined time interval longer than the constant time interval. May be detected.

  In order to detect an abnormality only when the endoscope is actually used, it is preferable to provide use detecting means for determining whether or not the video scope is used for endoscope operation. In this case, the current amount detection means detects the current amount only when it is in use.

  The endoscopic self-diagnosis device of the present invention adjusts the amount of current of a light source that emits illumination light for illuminating a subject, thereby adjusting the brightness of a subject image displayed based on an image signal read from an image sensor. During the automatic dimming process by the dimming means for adjusting the thickness, the current amount detecting means for detecting the current amount, and the abnormality for detecting whether the light amount of the illumination light is abnormal based on the detected current amount It is characterized by comprising detection means and notification means for notifying abnormality.

  The endoscopic self-diagnosis method of the present invention adjusts the current amount of a light source that emits illumination light for illuminating a subject, thereby adjusting the brightness of a subject image displayed based on an image signal read from an image sensor. During the automatic dimming process by the dimming means for adjusting the thickness, the current amount is detected, and based on the detected current amount, it is detected whether there is an abnormality with respect to the amount of illumination light, and the detected abnormality is detected. It is characterized by notifying.

  The program of the present invention adjusts the brightness of a subject image displayed based on an image signal read from an image sensor by adjusting the amount of current of a light source that emits illumination light for illuminating the subject. During the automatic dimming process by the means, a current amount detecting means for detecting the current amount, an abnormality detecting means for detecting whether or not the light amount of the illumination light is abnormal based on the detected current amount, and detected. It is characterized by functioning an informing means for informing the abnormalities.

  The electronic endoscope apparatus according to the present invention adjusts the brightness of the displayed subject image based on the image signal read from the image sensor by adjusting the light source that illuminates the subject and the electronic shutter speed of the image sensor. Light control means, electronic shutter speed detection means for detecting the electronic shutter speed during automatic light control processing by the light control means, and whether or not there is an abnormality in the amount of illumination light based on the detected electronic shutter speed And an abnormality detecting means for notifying the detected abnormality. For example, when the electronic shutter speed is excessively low, the amount of illumination light may be reduced due to contamination of the scope tip and a decrease in the light amount of the lamp, which hinders observation. In addition, when the electronic shutter speed is excessively high, there is a possibility that the automatic light control processing function is defective and there is a risk of burns. In the present invention, an abnormality is detected based on the electronic shutter speed measured in real time and notified to the operator.

  For example, the abnormality detection unit determines that the state is abnormal when the electronic shutter speed remains low for a certain period. When the amount of illumination light decreases due to contamination at the distal end of the scope or a decrease in the amount of light from the lamp, automatic light control processing at an excessively low electronic shutter speed continues. Alternatively, if the electronic shutter speed remains high for a certain period, it is desirable to determine that there is an abnormality because there is a risk of burns.

  As a configuration for detecting that the low-speed state of the electronic shutter speed continues for a certain period, for example, the ratio of the low-speed electronic shutter speed in the series of electronic shutter speeds that the abnormality detection unit periodically detects within a predetermined period. Can be determined to be abnormal if the value exceeds a considerable ratio (such as 70%). In this case, the electronic shutter speed detecting means detects the electronic shutter speed at a constant time interval and stores it in the memory, and the abnormality detecting means is based on a series of electronic shutter speeds stored at a predetermined time interval longer than the constant time interval. It is sufficient to detect an abnormality.

  In order to detect an abnormality only when an endoscope operation is actually performed, it is preferable to provide a usage detection means for determining whether or not the video scope is used for the endoscope operation. In this case, the electronic shutter speed detection means detects the electronic shutter speed only when using the video scope.

  The endoscopic self-diagnosis device of the present invention adjusts the brightness of the subject image displayed based on the image signal read from the image sensor by adjusting the electronic shutter speed of the image sensor provided in the video scope. During the automatic light control processing by the light control means, the electronic shutter speed detection means for detecting the electronic shutter speed and the abnormality for detecting whether or not the light quantity of the illumination light is abnormal based on the detected electronic shutter speed It is characterized by comprising detection means and notification means for notifying the detected abnormality.

  The endoscope self-diagnosis method of the present invention adjusts the brightness of a subject image displayed based on an image signal read from the image sensor by adjusting the electronic shutter speed of the image sensor provided in the video scope. During the automatic dimming process by the dimming means, the electronic shutter speed is detected, and based on the detected electronic shutter speed, it is detected whether there is an abnormality in the amount of illumination light, and the detected abnormality is notified It is characterized by doing.

  The program of the present invention automatically adjusts the electronic shutter speed of the image sensor provided in the video scope, thereby automatically adjusting the brightness of the displayed subject image based on the image signal read from the image sensor. During the dimming process, an electronic shutter speed detecting means for detecting the electronic shutter speed, an abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the detected electronic shutter speed, and detected. It is characterized by functioning an informing means for informing the abnormalities.

  The endoscope apparatus of the present invention includes a scope, a processor connected to the scope, a detection unit that periodically detects whether or not the amount of illumination light to the subject is in an abnormal state, And transmitting means for transmitting information on the abnormal state to the outside when the abnormal state is detected. Here, the abnormal state represents a state in which the amount of illumination light to the subject is excessive and may cause a burn. The transmission means notifies the abnormal state to the outside through a network or the like. For example, when an abnormal state is detected, information notifying the abnormal state is automatically transmitted by e-mail or the like to a maintenance center in a hospital or a repair center of an endoscope manufacturing company.

  If the scope tip is dirty due to foreign matter or the like, or if a malfunction occurs in the diaphragm mechanism or electronic shutter mechanism, the state where the light quantity is substantially maximum continues for a certain period of time. Therefore, the detection means may determine that the state is substantially the maximum light amount as an abnormal state when the state exceeds the predetermined time. However, the substantial maximum light quantity here includes not only the maximum light quantity in the range of the light quantity that can be irradiated but also 80 to 100% of the maximum light quantity. For example, when illumination of the subject with the maximum light amount such as the maximum aperture is continued for a predetermined period (for example, 1 to 2 minutes), it may be determined as an abnormal state.

  In order to prevent the same information from being repeatedly communicated to the repair center many times, the transmission means only needs to transmit the information on the abnormal state once or twice.

  The endoscope diagnostic apparatus according to the present invention determines whether or not the amount of illumination light to the subject is in an abnormal state during the operation after the initial setting of the endoscope apparatus, that is, automatically performs diagnosis, treatment, etc. It is characterized in that it comprises a detection means for periodically detecting independently during the execution of optical processing, and a transmission means for transmitting information on the abnormal state to the outside when an abnormal state is detected.

  The endoscope diagnosis method of the present invention periodically detects whether or not the amount of illumination light to the subject is in an abnormal state during the operation after the initial setting of the endoscope apparatus, and detects an abnormal state. In this case, the information on the abnormal state is transmitted to the outside.

  The program of the present invention, when detecting an abnormal state, detecting means for periodically detecting whether or not the amount of illumination light to the subject is in an abnormal state during the operation after the initial setting of the endoscope apparatus, It is characterized by functioning a transmission means for transmitting information on an abnormal state to the outside.

  According to the present invention, it is possible to notify an abnormality relating to the light amount during execution of the automatic light control processing.

  FIG. 1 is a block diagram of an electronic endoscope apparatus according to the first embodiment.

  The electronic endoscope apparatus includes a video scope 10 and a processor 30, and a keyboard 60 and a monitor 70 are connected to the processor 30. The video scope 10 is detachably connected to the processor 30.

  The video scope 10 includes a scope controller 20 including a CPU 21, a RAM 23, and a ROM 27. The scope controller 20 outputs a control signal to the image processing unit 12 and controls the operation of the video scope 10. In addition, data is mutually communicated between the scope controller 20 and the processor 30. When the video scope 10 is connected to the processor 30, the video scope 10 can be operated by supplying power from the main power supply of the processor 30. The ROM 27 stores a program related to the operation processing of the video scope 10.

  When the lamp 32 in the processor 30 is turned on, the light emitted from the lamp 32 enters the incident end 11A of the light guide 11 through a condenser lens (not shown). The light guide 11 transmits the light of the lamp 32 to the scope tip, and the light that has passed through the light guide 11 is emitted from the scope tip via a light distribution lens (not shown). Thereby, the observation site is illuminated.

  The light reflected at the observation site passes through the objective lens 13 and reaches the light receiving surface of the CCD 14. Thereby, a subject image is formed on the CCD 14 and an image signal corresponding to the subject image is generated. Image signals are read from the CCD 14 at regular time intervals and sent to the image processing unit 12 via an AGC (Auto Gain Control) circuit 16. Image signal reading from the CCD 14 is controlled by a CCD driver 12A in the image processing unit 12, and here, image signals for one field are read at 1/60 second intervals according to the NTSC system as a video standard.

  The image processing unit 12 is configured by a DSP (Digital Signal Processor), and performs various processes on the image signal such as white balance adjustment and gamma correction to generate luminance and color difference data. The generated luminance and color difference data is sent to the processor 30.

  In the signal processing circuit 42 of the processor 30, a video signal according to a predetermined video standard is generated based on the luminance and color difference data, and is output to the monitor 70. As a result, the observation image is displayed on the monitor 70. A system control circuit 40 including a CPU 47, a ROM 48, and a RAM 49 controls the operation of the processor 30, and the ROM 48 stores an operation control program. When a character code is output from the system control circuit 40 to the CRTC 45, a character signal is output from the CRTC 45 at a predetermined timing so that character information such as character information is displayed on the monitor 70.

  The diaphragm 31 is opened and closed to adjust the amount of illumination light from the lamp 32, and is driven by the drive unit 35. In order to execute the automatic light control processing, the system control circuit 40 uses the aperture 31 so that the subject image displayed on the monitor 70 is maintained at an appropriate brightness based on the luminance data transmitted from the signal processing circuit 42. Controls the opening and closing operation. That is, based on the difference or ratio between the detected luminance of the subject image and the reference luminance, a control signal is output to the drive unit 35 to adjust the aperture of the aperture 31.

  The EEPROM 18 of the video scope 10 stores data related to the characteristics of the video scope 10, and the EEPROM 43 of the processor 30 stores the characteristics of the lamp. The first gyro sensor 22 and the second gyro sensor 24 are provided in the operation unit of the video scope 10 in order to detect that the endoscope is being operated, and the video scope (operation unit) operates in two directions perpendicular to each other. ) To detect the angular velocity generated by the movement.

  FIG. 2 is a flowchart showing a main operation process executed by the system control circuit 40 of the processor 30.

  In step S101, initial setting processing is performed, and variables and the like are set to initial values. In step S102, processing related to the connection of the video scope is performed, and in step S103, communication processing with the video scope is performed. In step S104, a process for the keyboard operation is performed. In step S105, a process for the operation of the panel switch 50 is performed. In step S106, other processing is performed.

  FIG. 3 is a diagram showing a subroutine of step S102 in FIG.

  In step S201, it is determined whether or not the video scope 10 is newly connected. In the first embodiment, various types of videoscopes such as a lower digestive tract and an upper digestive tract are selectively connected to the processor 30 according to an observation target.

  If it is determined in step S201 that the video scope 10 is newly connected, the process proceeds to step S202. In step S 202, scope data such as a registration number of the connected video scope 10 is read from the EEPROM 18. In step S203, the scope connection variable vs is set to 1. Then, according to the type of the connected video scope 10, predetermined reference ratios (comparison values) CAL and CAS, which will be described later, are set. The scope connection variable vs is a variable indicating the connection state of the video scope, and is set to vs = 1 when the video scope is connected and vs = 0 when the video scope is not connected.

  On the other hand, if it is determined in step S201 that the video scope 10 is not newly connected, the process proceeds to step S204, and it is determined whether or not the video scope 10 is newly removed. If it is determined that the video scope 10 has not been newly removed, the subroutine ends as it is. On the other hand, if it is determined that the video scope 10 is newly removed, the process proceeds to step S205, where the scope connection variable vs is set to zero. In short, when a new scope is connected, steps S202 and S203 are executed. When a new scope is removed, step S205 is executed, and when the scope remains connected or not connected, there is no change. Do nothing.

  FIG. 4 is a subroutine of step S103 in FIG.

  In step S301, it is determined whether or not data has been transmitted from the video scope 10. If it is determined that data has not been transmitted from the video scope 10, the subroutine ends as it is. On the other hand, if it is determined that the data has been transmitted from the video scope 10, the process proceeds to step S <b> 302, and it is determined whether or not the transmitted data is use determination data for the video scope 10.

  If it is determined in step S302 that the data is not use determination data of the video scope 10, the process proceeds to step S304, and processing corresponding to the data is performed. On the other hand, if it is determined in step S302 that the transmitted data is the use determination data of the video scope 10, the process proceeds to step S303, and is set as a value of a use variable us described later.

  FIG. 5 is a flowchart showing automatic dimming processing and self-diagnosis processing executed by the system control circuit 40. Processing is performed by interrupting the main routine of FIG. 2 at 1/60 second intervals.

  In step S401, automatic light control processing is performed, and the aperture opening is adjusted based on the difference or ratio between the luminance value of the subject image and the reference value indicating the brightness of the appropriate subject image. In other words, if the brightness value of the subject image is smaller than the reference value, the aperture is driven to increase, and conversely, if the brightness value of the subject image is greater than the reference value, the aperture opening is decreased. Is done. In step S402, 1 is added to the first storage count variable vc1, and in step S403, it is determined whether or not the first storage count variable vc1 is 60 or more. The first storage count variable vc1 is a variable for counting time in order to periodically store the throttle opening in the RAM 49 once per second. The first storage count variable vc1 is set to 0 in the initial setting process in step S101 of FIG.

  If it is determined in step S403 that the first storage count variable vc1 is not 60 or more, the interrupt routine ends. On the other hand, if it is determined that the first storage count variable vc1 is 60 or more, the process proceeds to step S404, and the first storage count variable vc1 is set to zero.

  In step S405, it is determined whether or not the use variable us indicating use / non-use of the video scope 10 is 1. Here, it is determined whether or not the video scope 10 is substantially used, that is, whether or not the video scope 10 is operated by an operator for treatment, observation, etc., and the video scope 10 is used as will be described later. If the video scope 10 is not used, the usage variable us = 1 is set.

  If it is determined in step S405 that the video scope 10 is substantially used, the process proceeds to step S406, and the aperture opening set by the system control circuit 40 is temporarily stored in the RAM 49 as data.

  Here, the frequency distribution data of the throttle opening is stored in the RAM 49. The aperture opening is represented by an integer from 0 to 240. The larger the aperture opening, the greater the amount of light to the subject. The range 0 to 240 that the aperture can take is divided into 7 stages, 0 to 39, 40 to 79, 80 to 119, 120 to 159, 160 to 199, 200 to 219, and 220 to 240. The frequency distribution data of the throttle opening is generated by adding the frequency (frequency) corresponding to the detected throttle opening. When step S406 is executed, the process proceeds to step S407.

  In step S407, 1 is added to the second storage count variable vc2. The second storage count variable vc2 is a variable for counting time because an abnormality detection process described later is performed once every 6 minutes. The second storage count variable vc2 is set to 0 in advance in the initial setting process S101 of FIG. On the other hand, if it is determined that the video scope 10 is not substantially used, the process skips to step S408.

  In step S408, it is determined whether or not the second storage count variable vc2 is equal to or greater than 360, that is, whether or not 6 minutes have elapsed since the previous abnormality detection process. If it is determined that the second storage count variable vc2 is not 360 or more, the interrupt routine ends as it is. On the other hand, when it is determined that the second storage count variable vc2 is 360 or more, the process proceeds to step S409, where the second storage count variable vc2 is set to zero.

  In step S410, based on the aperture opening frequency distribution data stored in the RAM 49 for substantially 6 minutes during which the video scope 10 is being used, the detected aperture opening data having a larger aperture opening degree is selected. The ratio al is calculated, and the ratio as of a small throttle opening in the whole is calculated. Here, the ratio of the throttle opening 220 to 240 in the whole (0 to 240) is the large throttle opening ratio al, and the ratio of the throttle opening 0 to 40 in the whole is the small throttle opening ratio al. The ratio is as. Specifically, in the frequency distribution data of the throttle opening measured substantially for 6 minutes, it is obtained by the ratio of the throttle opening 220 to 240 or 0 to 40 with respect to the entire frequency (here, 360). When the ratios al and as are calculated, the frequency distribution data in the RAM 49 is reset to 0 in step S411.

  In step S412, it is determined whether the ratio al of the large throttle opening exceeds a predetermined ratio CAL (%) that is a comparison value, that is, whether the automatic dimming process is continued with a substantially large throttle opening. Is judged. There may be a case where the amount of light is insufficient due to dirt at the distal end of the scope, a decrease in the amount of light from the lamp 32, etc., and as a result, a state in which the aperture is increased. The predetermined ratio CAL is set to 90 (%) for a video scope for bronchi, 95 (%) for a video scope for stomach, and 85 (%) for a video scope for large intestine. ing.

  In step S412, when it is determined that the ratio al of the large throttle opening exceeds a predetermined ratio CAL (%) that is a comparison value, the process proceeds to step S413, and character information that prompts inspection is displayed on the monitor 70. In addition, a character signal is output from the CRTC 45. As a result, the operator recognizes that an abnormality or malfunction has occurred with respect to the amount of light. On the other hand, in step S412, when it is determined that the ratio al of the large throttle opening does not exceed the predetermined ratio CAL (%) that is the comparison value, the process proceeds to step S414.

  In step S414, it is determined whether or not the ratio as of the small throttle opening is larger than a predetermined ratio CAS (%) that is a comparison value. The predetermined ratio CAS is set to 25 (%) for the video scope for bronchi, 25 (%) for the video scope for stomach, and 35 (%) for the video scope for large intestine. Yes. If it is determined that the small throttle opening ratio as is not larger than the predetermined ratio CAS as a comparison value, the subroutine ends. On the other hand, if it is determined that the ratio “as” of the small throttle opening is larger than the predetermined ratio “CAS” as the comparison value, the process proceeds to step S415, and the character signal is sent from the CRTC 45 so that the character information prompting the lamp check is displayed on the monitor 70. Is output. This is to avoid a situation in which, for example, the light quantity of the lamp itself is unexpectedly large and a burn or the like occurs.

  FIG. 6 is a flowchart showing the use detection process of the video scope 10 executed by the scope controller 20. This process is executed by interrupting the main routine of the scope operation process executed by the scope controller 20 at 1/60 second time intervals.

  In step S501, angular velocity data from the first gyro sensor 22 is input. When the angular velocity data has a range of 0 to 255 and the data value is in the range of 121 to 135, the first gyro sensor 22 determines that the video scope 10 is not moving. In step S502, it is determined whether or not the value va1 of the angular velocity data is greater than 120 and less than 136.

  If it is determined in step S502 that the value va1 of the angular velocity data is greater than 120 and less than 136, the process proceeds to step S503, and 1 is added to the time measurement variable vc31. The time measurement variable vc31 is a counter that measures the time during which the first gyro sensor 22 does not detect movement. In step S504, it is determined whether or not the time measurement variable vc31 exceeds 1800, that is, whether or not a time during which no motion is detected continues for 30 seconds.

  If it is determined in step S504 that the time measurement variable vc31 exceeds 1800, the process proceeds to step S505, where the operation variable u1 is set to 0 and the time measurement variable vc31 is set to 0. The motion variable u1 is a variable indicating the motion of the video scope 10 based on the measurement of the first gyro sensor 22, and the motion variable u1 is set to 1 when there is a motion of the video scope 10, and when there is no motion. The operating variable u1 is set to zero.

  On the other hand, when it is determined in step S502 that the value va1 of the angular velocity data is not greater than 120 and less than 136, the process proceeds to step S506, where the motion variable u1 is set to 1 and the time measurement variable vc31 is set to 0. It is done.

  In step S507, angular velocity data from the second gyro sensor 24 is input. In steps S508 to S512, whether or not the video scope 10 has moved is determined by the second gyro sensor 24, as in steps S502 to S506. The operation variable u2 is a variable indicating the movement of the video scope 10 based on the measurement of the second gyro sensor 24. When the operation of the video scope 10 does not continue for 30 seconds, the operation variable u2 is set to 0, and the operation If there is, the operation variable u2 is set to 1.

  In step S513, it is determined whether or not the operation variables u1 and u2 are both zero. It is determined that the operation variables u1 and u2 are both 0, that is, the video scope 10 is not used by the operator and is not substantially used, such as being hung on the holding unit of the endoscope apparatus. If YES, the process proceeds to step S514, and the use variable us is set to 0. On the other hand, if it is determined in step S513 that the operation variables u1 and u2 are not 0, that is, the video scope 10 is used by the operator, the process proceeds to step S515, where the use variable us is set to 1. As described above, the value of the use variable us is periodically transmitted from the video scope 10 to the processor 30, and is set as the value of the variable us of the same name in the processor 30.

  As described above, according to the present embodiment, the automatic dimming processing by adjusting the aperture opening is executed at 1/60 second intervals, and the aperture opening data that changes in accordance with the automatic dimming processing is obtained every second. Is temporarily stored in the RAM 49 as frequency distribution data (S406). Then, once every 6 minutes when the video scope is substantially used, it is determined whether the ratio al of the large opening degree and the ratio as of the small opening degree are larger than the predetermined ratios CAL and CAS (S410, S412, S414). ). If the large throttle opening ratio al and the small throttle opening ratio as are larger than the predetermined ratios CAL and CAS, it is determined that there is an abnormality in the amount of light, and warning text information is displayed on the monitor 70 (S413, S415). ).

  Instead of notifying the abnormal state by display on the monitor 70, it may be configured to notify with a buzzer sound. Or you may comprise so that it may alert | report by both a warning display and a buzzer sound. Further, the movement of the tip of the video scope, the operation unit, or the like may be detected by a sensor other than the gyro sensor to determine whether or not the video scope is being used.

  The ratio “a” of the large aperture and the ratio “as” of the small aperture can be arbitrarily set. For example, the ratio “a” of the large aperture may be set to the frequency of the opening exceeding 80% of the full opening (240). The ratio as may be the frequency of the opening degree smaller than 20% of the full opening. Also, the predetermined ratios CAL and CAS to be referred to may be arbitrarily set according to the scope characteristics, such as 3/4 and 1/4, respectively.

  Next, the electronic endoscope apparatus according to the second embodiment will be described with reference to FIGS. In the second embodiment, unlike the first embodiment, automatic light control is performed by adjusting the amount of light emitted from an LED (light emitting diode) as a light source. Then, the frequency distribution data of the current amount is stored in the video scope. About another structure, it is the same as 1st Embodiment.

  FIG. 7 is a block diagram of an electronic endoscope apparatus according to the second embodiment.

  The video scope 10 ′ includes an image processing unit 12, an LED drive circuit 26 that drives an LED, and an LED 25. When the image signal read from the CCD 14 is sent to the image processing unit 12 via the AGC 16, predetermined processing such as white balance adjustment is performed on the image signal, and luminance and color difference data are generated. The scope controller 20 ′ including the CPU 21, RAM 23, and ROM 27 controls the operation of the video scope 10 ′. The ROM 27 stores in advance a program for controlling the operation of the video scope 10 ′. Note that a diaphragm and a lamp are not provided in a processor (not shown) (hereinafter, given a reference numeral “30 ′” for explanation).

  The LED 25 provided at the tip of the video scope 10 'emits light by the current sent from the LED drive circuit 26, and the scope controller 20' controls the amount of current. Based on the luminance signal sent from the image processing unit 12, the scope controller 20 'controls the drive current so that the brightness of the subject image is maintained at an appropriate brightness.

  FIG. 8 is a flowchart showing a main operation process of the scope executed by the scope controller 20 '.

  In step S601, each circuit is set to an initial state, and each variable is set to an initial value. In step S602, communication processing with the processor 30 'is performed, and in step S603, communication processing with the image processing unit 12 is performed. In step S604, switch operation processing in the video scope 10 'is performed, and in step S605, other processing is performed. Steps S602 to S605 are repeatedly executed until the main power supply of the processor 30 'is turned off or the video scope 10' is removed from the processor 30 '.

  FIG. 9 is a flowchart showing an automatic light control process and a self-diagnosis process executed in the scope controller 20 '. This process is executed by interrupting the main routine of FIG. 8 at 1/60 second intervals.

  In step S701, automatic light control processing is performed, and the amount of current to the LED 25 is controlled based on the difference (or ratio) between the detected luminance of the subject image and the reference luminance, so that the subject image has an appropriate brightness. The light emission amount of the LED 25 is adjusted so as to be maintained. The execution of steps S702 to S705 is the same as the execution of steps S402 to S405 in FIG. In step S <b> 706, data of the current amount to the LED 25 set at that time is stored in the RAM 23. Here, the value of the current amount is any integer value from 1 to 240. Similarly to the first embodiment, the frequency distribution data is divided into seven stages (1-39, 40-79, 80-119, 120-159, 160-199, 200-219, 220-240). Current amount data is stored.

  The execution of steps S707 to S709 is the same as the execution of steps S407 to S409 in FIG. In step S710, based on the current amount data stored in the RAM 23 for 6 minutes, a large current amount ratio cl is calculated, and a small current amount ratio cs is calculated. The Here, the ratio of the current amount 220-240 in the whole (1-240) is defined as the large current amount ratio cl, and the ratio of the current amount 0-40 in the whole is defined as the small current amount ratio cs. . Specifically, in the frequency distribution data of the current amount measured for 6 minutes when the video scope is used substantially, the current amount is determined by the current amount of 220 to 240 or 1 to 40 with respect to the entire frequency (here, 360). It is done. In step S711, the RAM data is reset to zero.

  In step S712, it is determined whether or not the large current amount ratio cl exceeds a predetermined ratio CCL (%) as a comparison value. The predetermined ratio CCL is set to 90 (%) for a video scope for bronchi, 95 (%) for a video scope for stomach, and 85 (%) for a video scope for large intestine. ing.

  If it is determined in step S712 that the large current amount ratio cl exceeds a predetermined ratio CCL (%) as a comparison value, the process proceeds to step S713, and character information that prompts inspection is displayed on the monitor 70. A character signal is output from the CRTC 45. As a result, the operator recognizes that an abnormality or malfunction has occurred with respect to the amount of light. On the other hand, when it is determined in step S712 that the large current amount ratio cl does not exceed the predetermined ratio CCL (%) as the comparison value, the process proceeds to step S714.

  In step S714, it is determined whether or not the small current amount ratio cs is larger than a predetermined ratio CCS (%) as a comparison value. The predetermined ratio CCS is set to 25 (%) for a videoscope for bronchi, 25 (%) for a videoscope for stomach, and 35 (%) for a videoscope for large intestine. Yes. If it is determined that the small current amount ratio cs is not larger than the predetermined ratio CCS that is the comparison value, the subroutine ends. On the other hand, if it is determined that the small current amount ratio cs is larger than the predetermined ratio CCS as the comparison value, the process proceeds to step S715, and the character signal is transmitted from the CRTC 45 so that the character information prompting the LED check is displayed on the monitor 70. Is output.

  Instead of providing the LED at the distal end portion of the video scope, the LED may be incorporated in a processor, for example, so that light is incident on a video guide ride guide, and the current amount of the LED is controlled in the processor. In this case, as in the first embodiment, the current amount data is stored in the RAM 49 by the system control circuit 40 and the current amount frequency distribution data is updated. At this time, current amount data may be stored in the EEPROM 18.

  Instead of the electronic endoscope device, the frequency distribution data of the aperture opening degree may be stored in the light source device used for using the fiberscope. Moreover, you may make it the structure which memorize | stores electric current amount distribution data in the fiberscope in which automatic light control processing is possible by adjusting the electric current amount of light sources, such as LED. You may use the light source which can control light-emission quantity with electric current other than LED.

  The large current amount ratio cl and the small current amount ratio cs can be arbitrarily set. For example, the large current amount ratio cl can be applied to the frequency number of the current amount exceeding 80% of the maximum output (240). The ratio cs of the small current amount may be the frequency number of the current amount lower than 20% of the maximum output. Also, the predetermined ratios CCL and CCS to be referred to may be arbitrarily set according to the scope characteristics and the like, such as 3/4 and 1/4, respectively.

  Next, the electronic endoscope apparatus according to the third embodiment will be described with reference to FIGS. In the third embodiment, automatic light control processing is executed by an electronic shutter function.

  FIG. 10 is a block diagram of an electronic endoscope apparatus according to the third embodiment.

  The electronic endoscope apparatus includes a video scope 10 ″ and a processor 30 ″, and a keyboard 60 and a monitor 70 are connected to the processor 30 ″. The video scope 10 ″ is detachably connected to the processor 30 ″. The

  The video scope 10 ″ includes a scope controller 20 including a CPU 21, a RAM 23, and a ROM 27. The scope controller 20 outputs a control signal to the image processing unit 12 ″ and the like to control the operation of the video scope 10 ″. Data is communicated between the controller 20 and the processor 30 ". When the video scope 10 ″ is connected to the processor 30 ″, the video scope 10 ″ can be operated by the power supply from the main power supply of the processor 30 ″. The ROM 27 stores a program relating to the operation processing of the video scope 10 ″.

  When the lamp 32 in the processor 30 ″ is turned on, the light emitted from the lamp 32 enters the incident end 11A of the light guide 11 through a condenser lens (not shown). The light guide 11 is light from the lamp 32. Is transmitted to the distal end portion of the scope, and the light passing through the light guide 11 is emitted from the distal end portion of the scope via a light distribution lens (not shown), thereby illuminating the observation site.

  The light reflected at the observation site passes through the objective lens 13 and reaches the light receiving surface of the CCD 14. Thereby, a subject image is formed on the CCD 14 and an image signal corresponding to the subject image is generated. Image signals are read from the CCD 14 at regular time intervals and sent to the image processing unit 12 "via the AGC circuit 16. Image signal reading from the CCD 14 is controlled by a CCD driver in the image processing unit 12". Here, according to the NTSC system as a video standard, an image signal for one field is read at 1/60 second intervals.

  The image processing unit 12 ″ is configured by a DSP (Digital Signal Processor), and various processes are performed on the image signal such as white balance adjustment and gamma correction to generate luminance and color difference data. The luminance and color difference data is sent to the processor 30 ".

  In the signal processing circuit 42 of the processor 30 ″, a video signal in accordance with a predetermined video standard is generated based on the luminance and color difference data, and is output to the monitor 70. Thereby, an observation image is displayed on the monitor 70. The system control circuit 40 including the CPU 47, the ROM 48, and the RAM 49 controls the operation of the processor 30 ″, and the ROM 48 stores an operation control program. When a character code is output from the system control circuit 40 to the CRTC 45, a character signal is output from the CRTC 45 at a predetermined timing so that character information such as character information is displayed on the monitor 70.

  The scope controller 20 of the video scope 10 ″ performs an automatic light control process based on the luminance data sent from the image processing unit 12 ″, and a control signal for setting the charge accumulation time of the CCD 14, that is, the electronic shutter speed. Is transmitted to the image processing unit 12 ″. The charge accumulation time of the CCD 14 is adjusted based on the drive signal from the CCD driver 12 ″ A in the image processing unit 12 ″, and the brightness of the subject image is maintained constant. Here, automatic light control processing is performed in accordance with the signal readout time interval (1/60 seconds) of the image signal.

  The EEPROM 18 stores data related to the characteristics of the video scope 10 ″. The RAM 23 stores frequency distribution data of a series of electronic shutter speeds, as will be described later. The first gyro sensor 22 and the second gyro sensor 22. The gyro sensor 24 is provided in the operation unit of the video scope 10 ″ for detecting that the endoscope is being operated, and is generated by the movement of the video scope (operation unit) in two directions perpendicular to each other. Detect angular velocity.

  FIG. 11 is a flowchart showing a main operation process executed by the scope controller 20 of the video scope 10 ″.

  In step S801, each circuit is set to an initial state, and each variable is set to an initial value. In step S802, communication processing with the processor 30 "is performed, and in step S803, communication processing with the image processing unit 12" is performed. In step S804, switch operation processing is performed in the video scope 10 ″, and other processing is performed in step S805. The main power supply of the processor 30 ″ is turned off, or the video scope 10 ″ is moved from the processor 30 ″. Steps S802 to S805 are repeatedly executed until it is removed.

  FIG. 12 is a flowchart showing an automatic light control process and a self-diagnosis process executed by the scope controller 20. Processing is performed by interrupting the main routine of FIG. 11 at 1/60 second intervals.

  In step S901, automatic light control processing is performed, and the charge accumulation time of the CCD 14, that is, the electronic shutter speed, is adjusted based on the difference or ratio between the luminance value of the subject image and the reference value indicating the brightness of the appropriate subject image. The In step S902, 1 is added to the first storage count variable vc1, and in step S903, it is determined whether or not the first storage count variable vc1 is 60 or more. The first storage count variable vc1 is a variable that counts the time for periodically storing the electronic shutter speed in the RAM 23 once per second. The first storage count variable vc1 is set to 0 in the initial setting process in step S801 of FIG.

  If it is determined in step S903 that the first storage count variable vc1 is not 60 or more, the interrupt routine ends. On the other hand, when it is determined that the first storage count variable vc1 is 60 or more, the process proceeds to step S904, where the first storage count variable vc1 is set to zero.

  In step S905, it is determined whether or not the usage variable us indicating use / non-use of the video scope 10 ″ is 1. Here, it is determined whether or not the video scope 10 ″ is substantially used, that is, treatment. It is determined whether or not the video scope 10 ″ is operated by an operator for inspection or the like. As will be described later, when the video scope 10 ″ is used, the use variable us = 1 and the video scope 10 ″ are set. When it is not used, the use variable us = 0 is set.

  If it is determined in step S905 that the video scope 10 ″ is substantially used, the process proceeds to step S906, where the charge accumulation time set by the scope controller 20, that is, the electronic shutter speed, is temporarily stored in the RAM 23 as data. Stored in

  Here, frequency distribution data of the electronic shutter speed is stored in the RAM 23. The range of 1/60 to 1/10000 (seconds) that the electronic shutter speed can take is 1/60 to 1/80 (does not exceed 1/80, and similarly does not exceed the boundary maximum value), 1/80 to 1 / 120, 1/120 to 1/250, 1/250 to 1/500, 1/500 to 1/1000, 1/1000 to 1/2000, 1/2000 to 1/4000, 1/4000 to 1/40000 The frequency distribution data of the electronic shutter speed is generated by adding the frequency (frequency) corresponding to the detected electronic shutter speed among the eight stages. When step S906 is executed, the process proceeds to step S907.

  In step S907, 1 is added to the second count variable vc2. The second count variable vc2 is a variable for counting time because an abnormality detection process described later is performed once every 6 minutes. The second count variable vc2 is set to 0 in advance in the initial setting process. On the other hand, if it is determined that the video scope 10 ″ is not substantially used, the process skips to step S908.

  In step S908, it is determined whether or not the second count variable vc2 is equal to or greater than 360, that is, whether or not 6 minutes have passed since the previous abnormality detection process (substantially used time). If it is determined that the second count variable vc2 is not equal to or greater than 360, the interrupt routine ends as it is. On the other hand, when it is determined that the second count variable vc2 is 360 or more, the process proceeds to step S909, and the second count variable vc2 is set to 0.

  In step S910, based on the frequency distribution data of the electronic shutter speed stored in the RAM 23 for 6 minutes, whether or not the ratio of the low-speed shutter speed to the whole exceeds the predetermined ratio CS, that is, the electronic shutter that is substantially low-speed. It is determined whether the automatic dimming process is continued at the speed. If the light amount becomes insufficient due to dirt on the scope tip, a decrease in the light amount of the lamp 32, etc., the electronic shutter speed continues to be low as a result. Here, 1/60 to 1/80 (seconds) is defined as the low shutter speed, and the ratio of the low shutter speed is obtained from the overall frequency (360) of the electronic shutter speed measured for 6 minutes. The predetermined ratio CS is set to 90 (%) here, assuming that a video scope for bronchi is used.

  If it is determined in step S910 that the ratio of the low shutter speed does not exceed the predetermined ratio CS, the process skips to step S912. On the other hand, if it is determined that the ratio of the low shutter speed exceeds the predetermined ratio CS, the process proceeds to step S911, and a character signal is output from the CRTC 45 so as to display character information that prompts inspection on the monitor 70. As a result, the operator recognizes that an abnormality or malfunction has occurred with respect to the amount of light. In step S912, the RAM data is reset to zero.

  FIG. 13 is a flowchart showing the use detection process of the video scope 10 ″. The process is executed by interrupting the main routine at 1/60 second intervals.

  In step S1101, angular velocity data from the first gyro sensor 22 is input. When the angular velocity data has a range of 0 to 255 and the data value is in the range of 121 to 135, it is determined by the first gyro sensor 22 that the video scope 10 ″ is not moving. In step S1102, the value of the angular velocity data is determined. It is determined whether or not va1 is a value greater than 120 and less than 136.

  If it is determined in step S1102 that the value va1 of the angular velocity data is greater than 120 and less than 136, the process proceeds to step S1103, and 1 is added to the time measurement variable vc31. The time measurement variable vc31 is a counter that measures the time during which the first gyro sensor 22 does not detect movement. In step S304, it is determined whether or not the time measurement variable vc31 exceeds 3600, that is, whether or not a time during which no motion is detected continues for 60 seconds.

  If it is determined in step S1104 that the time measurement variable vc31 exceeds 3600, the process proceeds to step S1105, where the operation variable u1 is set to 0 and the time measurement variable vc31 is set to 0. The motion variable u1 is a variable indicating the movement of the video scope 10 ″ based on the measurement of the first gyro sensor 22. The motion variable u1 is set to 1 when there is a motion of the video scope 10 ″, and there is no motion. In this case, the operation variable u1 is set to zero.

  On the other hand, if it is determined in step S1102 that the value va1 of the angular velocity data is not greater than 120 and less than 136, the process proceeds to step S1106, where the motion variable u1 is set to 1 and the time measurement variable vc31 is set to 0. It is done.

  In step S1107, angular velocity data from the second gyro sensor 24 is input. In steps S1108 to S1112, as in steps S1102 to S1106, it is determined by the second gyro sensor 24 whether or not there is movement of the video scope 10 ″. If it continues, the operation variable u2 is set to 0, and if there is an operation, the operation variable u2 is set to 1.

  In step S1113, it is determined whether or not the operation variables u1 and u2 are both zero. It is determined that the operation variables u1 and u2 are both 0, that is, the video scope 10 ″ is not used by the operator and is not substantially used such as being hung on the holding unit of the endoscope apparatus. If YES in step S1114, the flow advances to step S1114 to set the use variable us to 0. On the other hand, in step S1113, it is determined that the operation variables u1 and u2 are not 0, that is, the video scope 10 ″ is being used by the operator. If YES in step S315, the flow advances to step S315, and the use variable us is set to 1.

  As described above, according to the present embodiment, automatic dimming processing by the electronic shutter function is executed at 1/60 second intervals, and electronic shutter speed data that changes in accordance with the automatic dimming processing is obtained every second. It is temporarily stored in the RAM 23 as frequency distribution data. Then, it is determined whether the ratio of the low electronic shutter speed is larger than a predetermined ratio once every six minutes. When the ratio is larger than the predetermined ratio, it is determined that there is an abnormality in the amount of light, and warning character information is displayed on the monitor 70.

  Instead of notifying the abnormal state by display on the monitor 70, it may be configured to notify with a buzzer sound. The predetermined ratio may be set according to the characteristics of different scopes to be observed, such as the upper digestive tract and the lower digestive tract.

  Next, an electronic endoscope apparatus according to a fourth embodiment will be described with reference to FIGS. In the fourth embodiment, unlike the first embodiment, the abnormal state of the light amount is detected by the processor. About another structure, it is the same as 1st Embodiment.

  FIG. 14 is a flowchart showing an automatic light control process and a self-diagnosis process executed in the scope controller 20.

  The execution of steps S1201 to S1209 is the same as the execution of steps S901 to S909 in FIG. That is, electronic shutter speed data is stored in the RAM 23 of the scope controller 20 at intervals of 1 second. In step S1210, the electronic shutter speed data stored in the RAM 23 is transmitted to the system control circuit 40 of the processor 30 ″ once every six minutes. In step S1211, the RAM data is reset to zero.

  FIG. 15 is a flowchart showing an operation process of the processor.

  In step S1301, initial setting processing is performed, and variables and the like are set to initial values. In step S1302, processing related to the connection of the video scope is performed, and in step S1303, communication processing with the video scope is performed. In step S1304, a process for the keyboard operation is performed. In step S1305, a process for the operation of the panel switch 50 is performed. In step S1306, other processing is performed.

  FIG. 16 is a diagram showing a subroutine of step S1302 of FIG.

  In step S1401, it is determined whether or not the video scope 10 ″ is newly connected. In the second embodiment, various types of video scopes such as a lower digestive tract and an upper digestive tract are used as processors. Selectively connected to 30 ″.

  If it is determined in step S1401 that the video scope 10 ″ is newly connected, the process proceeds to step S1402. In step S1402, scope data such as a registration number of the connected video scope 10 ″ is read from the EEPROM 18. In step S1403, the scope connection variable vs is set to 1. Then, predetermined ratios CSL and CSH, which will be described later, are set according to the connected video scope 10 ″. The scope connection variable vs is a variable indicating the connection state of the video scope, and the video scope is connected. In this case, vs = 1, and in a case where no video scope is connected, vs = 0.

  On the other hand, if it is determined in step S1401 that the video scope 10 ″ is not newly connected, the process proceeds to step S1404, and it is determined whether or not the video scope 10 ″ is newly removed. If it is determined that the video scope 10 ″ has not been newly removed, the subroutine ends as it is. If it is determined that the video scope 10 ″ has been newly removed, the process proceeds to step S1405, and the scope connection variable is determined. vs is set to zero. In short, when a new scope is connected, steps S1402 and S1403 are executed, and when a new scope is removed, step S1405 is executed, and when there is no change with the scope connected or not connected. Do nothing.

  FIG. 17 is a subroutine of step S1303 of FIG.

  In step S1501, it is determined whether or not data has been transmitted from the video scope 10 ". If it is determined that data has not been transmitted from the video scope 10", the subroutine ends as it is. On the other hand, if it is determined that the data has been transmitted from the video scope 10 ″, the process proceeds to step S1502, and it is determined whether or not the transmitted data is electronic shutter speed data.

  If it is determined in step S1502 that the transmitted data is data other than the electronic shutter speed, the process proceeds to step S1508, and processing according to the data is performed. On the other hand, if it is determined in step S1502 that the data is electronic shutter speed data, the process proceeds to step S1503, and based on the detected electronic shutter speed frequency distribution data, the low shutter speed ratio sl (%) and the high speed A shutter speed ratio sh (%) is calculated. Here, the ratio of the electronic shutter speed of 1/60 to 1/80 in the whole is sl, and the ratio of the electronic shutter speed in the whole of 1/2000 to 1/40000 is sh. Specifically, in the frequency distribution data of the electronic shutter speed, sl (%) is obtained by the frequency of the electronic shutter speed 1/60 to 1/80 with respect to the entire frequency (here, 360), and the electronic shutter speed 1 / Sh (%) is calculated | required by the frequency of 2000-1 / 40000.

  In step S1504, it is determined whether the low-speed electronic shutter speed ratio sl is greater than a predetermined ratio CSL. Here, CSL = 85 (%) is set (in the case of a videoscope for large intestine). If it is determined in step S1504 that the low-speed electronic shutter speed ratio sl is greater than the predetermined ratio CSL, the process advances to step S1506 to display a warning on the monitor 70.

  On the other hand, if it is determined in step S1504 that the low-speed shutter ratio sl is not greater than the predetermined ratio CSL, the process advances to step S1505. In step S1505, it is determined whether the high-speed electronic shutter speed ratio sh is greater than a predetermined ratio CSH. Here, a shutter speed of 1/2000 or more is regarded as a high shutter speed, and the predetermined ratio CSH is set to 5 (%) (in the case of a videoscope for large intestine). If it is determined in step S1505 that the high-speed electronic shutter speed ratio sh is larger than the predetermined ratio CSH, the process advances to step S1507 to display a warning on the monitor 70.

  The dimming control process, that is, the process for adjusting the charge accumulation time of the CCD may be performed in the system control circuit of the processor.

  The low-speed electronic shutter speed ratio sl and the high-speed electronic shutter speed ratio sh can be arbitrarily set. For example, a large current amount ratio cl is a current amount exceeding 80% of the maximum output (240). The frequency number may be the target, and the small current amount ratio cs may be the frequency number of the current amount lower than 20% of the maximum output. However, the electronic shutter speed here is expressed logarithmically. Further, the predetermined ratios CSL and CSH to be referred to may be arbitrarily set according to the scope characteristics, such as 3/4 and 1/4, respectively.

  Next, a fifth embodiment will be described with reference to FIGS. In the fifth embodiment, an abnormality in the amount of light is reported to the outside by a communication network.

  FIG. 18 is a block diagram of an electronic endoscope apparatus according to the fifth embodiment.

  The electronic endoscope apparatus includes a video scope 100 having a CCD 120 and a processor 300 that processes an image signal read from the CCD 120. The video scope 100 is detachably connected to the processor 300, and a monitor 500 that displays a subject image is connected to the processor 300. The processor 300 incorporates a control computer (control PC) 240. The control computer 240 controls the processor 300 and incorporates a program for controlling the operation of the processor 300 such as video signal processing. An e-mail transmission function is provided. The processor 300 is connected to a computer system at an external repair center through a network.

  When a lamp lighting switch (not shown) is turned on, light emitted from the lamp 200 is incident on an incident end of a light guide 140 provided in the video scope 100 via a condenser lens (not shown) and a diaphragm 160. Incident at 140A. The light guide 140 transmits light emitted from the lamp 200 to the distal end side of the video scope 100, and when the light passing through the light guide 140 is emitted from the emission end 140B, a light distribution lens (not shown) that is a diffusion lens. Light is irradiated to the observation site via.

  The light reflected at the observation site reaches the CCD 120 via an objective lens (not shown), and an image of the observation site is formed on the light receiving surface of the CCD 120. In this embodiment, a single-plate simultaneous type is applied as a color imaging method, and yellow (Ye), cyan (Cy), magenta (Mg), and green (G) color elements are checked on the light receiving surface of the CCD 120. Complementary color filters (not shown) arranged in a line are arranged so as to correspond to the respective pixels on the light receiving surface.

  In the CCD 120, an image signal of a subject image corresponding to a color passing through a complementary color filter is generated by photoelectric conversion, and an image signal for one field is sequentially read out at a predetermined time interval according to a color difference line sequential method. For example, the NTSC system is applied as the color television system, and image signals for one field are sequentially read out every 1/60 second interval and sent to the image processing unit 220.

  In the image processing unit 220, various processes such as amplification processing, white balance adjustment, and gamma correction are performed on the image signal to generate a video signal. The generated video signal is output to the monitor 500, whereby the observation image is displayed on the monitor 500.

  The light control unit 180 is an automatic light control circuit for maintaining the brightness of a subject image to be displayed by driving the diaphragm 160, and is connected to the control computer 240. The image signal read from the CCD 120 is sent to the image processing unit 220 where a luminance signal is generated. The dimming unit 180 detects the luminance of the subject image based on the luminance signal sent from the image processing unit 220, and controls the aperture 160 based on the difference between the luminance value and the reference value indicating the standard brightness. Open and close.

  FIG. 19 is a flowchart showing an operation process of the processor executed by the control computer 240.

  In step S1601, each circuit, variable, and the like are initialized, and a self-diagnosis process is executed without any system error. In step S1602, a processor-related operation is executed, and video signal processing control and the like are performed. In step S1603, scope related processing is performed, and processing based on data sent from the scope 100 is executed. In step S1604, a light amount monitoring process is executed.

  FIG. 20 is a diagram showing a subroutine of step S1604 of FIG.

  In step S1701, it is determined whether 0.5 sec has elapsed since the light amount monitoring process executed last time. The light amount monitoring process here detects the light amount, that is, the opening degree of the diaphragm 160 every 0.5 seconds. Data relating to the opening of the diaphragm 16 is sent from the light control unit 180 to the control computer 240. If it is determined that 0.5 sec has not elapsed since the previous light amount monitoring process, the subroutine ends as it is. On the other hand, if it is determined that 0.5 sec has elapsed since the previous light amount monitoring process, the process proceeds to step S202.

  In step S1702, it is determined whether or not the diaphragm 160 is fully opened, that is, whether the light amount is the maximum light amount. If it is determined that the light amount is the maximum light amount, the process proceeds to step S1703, and 1 is added to the defect count variable cr. The defect count variable cr1 is a variable for counting a time during which the state is maintained after the light amount reaches the maximum light amount. On the other hand, if it is determined that the light amount is not the maximum light amount, the process proceeds to step S1704, and the defect count variable is set to zero. The defect count variable is set to 0 in the initial setting process in step S1601 shown in FIG.

  In step S1705, it is determined whether or not the malfunction count variable cr1 is a constant CN1 (120 in this case), that is, whether or not the maximum light amount continues for 60 seconds. In the present embodiment, when the maximum light amount continues for 60 seconds, the light amount is abnormally increased due to dirt on the scope tip or malfunction of the diaphragm 16, and it is determined that the automatic light control processing is in an abnormal state. . If it is determined that the defect count variable cr1 is not 120, the subroutine ends as it is. On the other hand, if it is determined that the defect count variable cr1 is 120, the process proceeds to step S1706.

  In step S1706, it is determined whether or not the report count variable cr2 is smaller than 2. The report count variable cr2 is a counter for limiting the number of times of notification to the outside such as a repair center that an abnormal state has occurred, and is configured to report only twice here. When it is determined that the report count variable cr2 is 2 or more, the subroutine ends as it is. On the other hand, if it is determined that the report count variable cr2 is smaller than 2, the process proceeds to step S1707. Note that the report count variable cr2 is set to 0 in the initial setting similarly to the defect count variable cr1.

  In step S1707, in order to notify the abnormal state, data notifying the abnormal state is transmitted from the processor 300 to the computer system of the repair center by e-mail, for example. At this time, ID data of the endoscope apparatus used, such as an endoscope name and a registration number, is transmitted at the same time. Further, the image processing unit 220 is controlled to display warning character information (for example, “caution: maximum light amount”) on the monitor 500 in order to notify the operator of the abnormal state. In step S1708, 1 is added to the report count variable cr2.

  As described above, according to the present embodiment, when the amount of illumination light to the subject is the maximum light amount (the opening of the diaphragm 16 is maximum) and the state continues for 60 seconds or more, the light amount is abnormal. It is determined that there is (S1702 to S1705), data notifying the abnormal state is transmitted to the outside, and warning information is displayed on the monitor 500 (S1707).

  The duration of the maximum light amount is not limited to 60 seconds. Moreover, you may determine with an abnormal state also when the light quantity of 70-100% of the maximum light quantity continues for a fixed time. Regarding automatic light control, automatic light control processing may be performed by an electronic shutter instead of an aperture. In this case, an abnormal state is detected based on the charge accumulation time. You may apply to the light source device which uses a fiberscope instead of an electronic endoscope apparatus.

It is a block diagram of the electronic endoscope apparatus which is 1st Embodiment. It is the flowchart which showed the main operation process performed by the system control circuit of a processor. FIG. 3 is a diagram showing a subroutine of step S102 of FIG. This is a subroutine of step S103 in FIG. It is the flowchart which showed the automatic light control process and the self-diagnosis process performed by a system control circuit. It is the flowchart which showed the use detection process of the video scope performed by a scope controller. It is a block diagram of the electronic endoscope apparatus which is 2nd Embodiment. It is the flowchart which showed the main operation | movement process of the scope performed by a scope controller. It is the flowchart which showed the automatic light control process and self-diagnosis process which are performed in a scope controller. It is a block diagram of the electronic endoscope apparatus which is 3rd Embodiment. It is the flowchart which showed the main operation | movement process performed by the scope controller of a video scope. It is the flowchart which showed the automatic light control process and self-diagnosis process which are performed by the scope controller. It is the flowchart which showed the use detection process of the video scope. 14 is a flowchart illustrating automatic light control processing and self-diagnosis processing executed in a scope controller in the fourth embodiment. It is the flowchart which showed the operation process of the processor in 4th Embodiment. FIG. 16 is a diagram showing a subroutine of step S1302 of FIG. This is a subroutine of step S1303 in FIG. It is a block diagram of the electronic endoscope apparatus which is 5th Embodiment. It is a flowchart which shows the operation processing of a processor. It is the figure which showed the subroutine of step S1604 of FIG.

Explanation of symbols

10, 10 'video scope 12 image processing unit 14 CCD
18 EEPROM (nonvolatile memory)
20, 20 'Scope controller 23 RAM (volatile memory)
25 LED (light source)
26 LED drive circuit (light source drive means)
30 Processor 31 Aperture 32 Lamp (light source)
35 Drive unit 40 System control circuit 49 RAM (volatile memory)

Claims (42)

An electronic endoscope apparatus comprising a video scope having an image sensor and a processor to which the video scope is connected,
A light source that emits illumination light to illuminate the subject;
Dimming means for adjusting the brightness of the subject image displayed based on the image signal read from the image sensor by adjusting the amount of the illumination light;
During the automatic light control processing by the light control means, a light quantity detection means for detecting the light quantity of illumination light,
An abnormality detecting means for detecting whether the amount of illumination light is abnormal based on the amount of illumination light detected;
An electronic endoscope apparatus comprising: an informing means for informing an abnormality detected by the abnormality detecting means.   The electronic endoscope apparatus according to claim 1, wherein the light amount detection unit periodically detects a light amount of illumination light.   2. The electronic device according to claim 1, wherein the abnormality detection unit determines that an abnormality is present when a state in which a light amount of illumination light exceeds a maximum light amount or a light amount close to the maximum light amount continues for a predetermined period. Endoscopic device. The light amount detecting means regularly detects the amount of illumination light in order to obtain distribution data of the amount of illumination light,
The abnormality detection means determines that an abnormality is detected when a ratio of a relatively large amount of illumination light in a detected amount of illumination light exceeds a predetermined ratio. Item 2. The electronic endoscope apparatus according to Item 1.   The electronic endoscope apparatus according to claim 1, wherein the abnormality detection unit detects an abnormality during a period in which the video scope is substantially used for endoscopic work. A light amount detecting means for detecting the light amount of the illumination light during the automatic light control processing in which the light amount of the illumination light for illuminating the subject is adjusted;
An abnormality detecting means for detecting whether the amount of illumination light is abnormal based on the amount of illumination light detected;
An endoscopic self-diagnosis device comprising: notifying means for notifying an abnormality detected by the abnormality detecting means. During the automatic dimming process in which the amount of illumination light for illuminating the subject is adjusted, the amount of illumination light is detected,
Based on the detected amount of illumination light, detect whether the amount of illumination light is abnormal,
A self-diagnosis method for an endoscope, characterized by notifying a detected abnormality. A light amount detecting means for detecting the light amount of the illumination light during the automatic light control processing in which the light amount of the illumination light for illuminating the subject is adjusted;
An abnormality detecting means for detecting whether the amount of illumination light is abnormal based on the amount of illumination light detected;
A program for causing a notifying means for notifying an abnormality detected by the abnormality detecting means to function. An electronic endoscope apparatus comprising a video scope having an image sensor and a processor to which the video scope is connected,
A light source that emits illumination light to illuminate the subject;
A diaphragm for adjusting the amount of the illumination light;
Dimming means for adjusting the brightness of the subject image displayed based on the image signal read from the image sensor by adjusting the aperture of the diaphragm,
During automatic dimming processing by the dimming means, an aperture opening detecting means for detecting the aperture opening;
An abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the detected aperture opening;
An electronic endoscope apparatus comprising: an informing means for informing an abnormality detected by the abnormality detecting means.   The electronic endoscope apparatus according to claim 9, wherein the abnormality detection unit determines that the abnormality is present when a state in which the aperture opening is large continues for a certain period.   The electronic endoscope apparatus according to claim 9, wherein the abnormality detection unit determines that an abnormality is present when a state in which the throttle opening is small continues for a certain period.   The abnormality detection means determines that an abnormality is detected when a ratio of a large throttle opening exceeds a predetermined ratio in a series of throttle openings periodically detected within a predetermined period. The electronic endoscope apparatus according to claim 9. The throttle opening detection means detects the throttle opening at regular time intervals and stores it in a memory;
The electronic endoscope apparatus according to claim 12, wherein the abnormality detection unit detects an abnormality based on a series of aperture openings stored at a predetermined time interval longer than the predetermined time interval. Use detection means for determining whether or not the videoscope is used for endoscope operation;
The electronic endoscope apparatus according to claim 9, wherein the aperture opening detection unit detects the aperture opening only when the video scope is used. Automatic dimming by dimming means that adjusts the brightness of the displayed subject image based on the image signal read from the image sensor by adjusting the aperture of the iris that adjusts the illumination light for illuminating the subject During the processing, a throttle opening detection means for detecting the throttle opening;
An abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the detected aperture opening;
An endoscopic self-diagnosis device comprising: notifying means for notifying an abnormality detected by the abnormality detecting means. Automatic dimming by dimming means that adjusts the brightness of the displayed subject image based on the image signal read from the image sensor by adjusting the aperture of the iris that adjusts the illumination light for illuminating the subject During processing, detect the throttle opening,
Based on the detected opening of the diaphragm, it is detected whether it is abnormal with respect to the amount of illumination light,
A self-diagnosis method for an endoscope, characterized by notifying a detected abnormality. Automatic dimming by dimming means that adjusts the brightness of the displayed subject image based on the image signal read from the image sensor by adjusting the aperture of the iris that adjusts the illumination light for illuminating the subject During the processing, a throttle opening detection means for detecting the throttle opening;
An abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the detected aperture opening;
A program for causing a notifying means for notifying an abnormality detected by the abnormality detecting means to function. An electronic endoscope apparatus comprising a video scope having an image sensor and a processor to which the video scope is connected,
A light source that emits illumination light to illuminate the subject;
Light source driving means for driving the light source by supplying current to the light source;
A light control means for adjusting the brightness of a subject image displayed based on an image signal read from the image sensor by adjusting a current amount;
During the automatic dimming processing by the dimming means, current amount detection means for detecting the current amount;
An abnormality detection means for detecting whether the amount of illumination light is abnormal based on the detected current amount;
An electronic endoscope apparatus comprising: an informing means for informing an abnormality detected by the abnormality detecting means.   The electronic endoscope apparatus according to claim 18, wherein the abnormality detection unit determines that the abnormality is present when a large amount of current continues for a certain period.   The electronic endoscope apparatus according to claim 18, wherein the abnormality detection unit determines that an abnormality is present when a small amount of current continues for a certain period.   The abnormality detection unit determines that the abnormality is present when a ratio of a large current amount in a series of current amounts periodically detected within a predetermined period exceeds a predetermined ratio. 18. An electronic endoscope apparatus according to 18. The current amount detection means detects the current amount at regular time intervals and stores it in a memory,
The electronic endoscope apparatus according to claim 21, wherein the abnormality detection unit detects an abnormality based on a series of current amounts stored at a predetermined time interval longer than the predetermined time interval. Use detection means for determining whether or not the videoscope is used for endoscope operation;
19. The electronic endoscope apparatus according to claim 18, wherein the current amount detection means detects a current amount only when it is in use. Automatic dimming processing by dimming means that adjusts the brightness of a subject image displayed based on the image signal read from the image sensor by adjusting the current amount of a light source that emits illumination light for illuminating the subject A current amount detecting means for detecting a current amount;
An abnormality detection means for detecting whether the amount of illumination light is abnormal based on the detected current amount;
An endoscopic self-diagnosis device comprising: notifying means for notifying an abnormality detected by the abnormality detecting means. Automatic dimming processing by dimming means that adjusts the brightness of a subject image displayed based on the image signal read from the image sensor by adjusting the current amount of a light source that emits illumination light for illuminating the subject In the middle, the amount of current is detected,
Based on the detected amount of current, it is detected whether or not the amount of illumination light is abnormal,
A self-diagnosis method for an endoscope, characterized by notifying a detected abnormality. Automatic dimming processing by dimming means that adjusts the brightness of a subject image displayed based on the image signal read from the image sensor by adjusting the current amount of a light source that emits illumination light for illuminating the subject A current amount detecting means for detecting a current amount;
An abnormality detection means for detecting whether the amount of illumination light is abnormal based on the detected current amount;
A program for causing a notifying means for notifying an abnormality detected by the abnormality detecting means to function. A video scope of an electronic endoscope apparatus having an image sensor,
A light source that emits illumination light to illuminate the subject;
Light source driving means for driving the light source by supplying current to the light source;
A light control means for adjusting the brightness of a subject image displayed based on an image signal read from the image sensor by adjusting a current amount;
During the automatic dimming processing by the dimming means, current amount detection means for detecting the current amount;
An abnormality detection means for detecting whether the amount of illumination light is abnormal based on the detected current amount;
A videoscope for an electronic endoscope apparatus, comprising: an informing means for informing an abnormality detected by the abnormality detecting means. An electronic endoscope apparatus comprising a video scope having an image sensor and a processor to which the video scope is connected,
A light source that illuminates the subject;
Dimming means for adjusting the brightness of a subject image displayed based on an image signal read from the image sensor by adjusting an electronic shutter speed of the image sensor;
Electronic shutter speed detection means for detecting an electronic shutter speed during the automatic light control processing by the light control means;
An abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the detected electronic shutter speed;
An electronic endoscope apparatus comprising: an informing means for informing an abnormality detected by the abnormality detecting means.   29. The electronic endoscope apparatus according to claim 28, wherein the abnormality detection unit determines that an abnormality is present when a low-speed state of the electronic shutter speed continues for a certain period.   29. The electronic endoscope apparatus according to claim 28, wherein the abnormality detection unit determines that the abnormality is present when the high-speed state of the electronic shutter speed continues for a certain period.   The abnormality detection means determines that an abnormality is detected when a ratio of the low-speed electronic shutter speed exceeds a predetermined ratio in a series of electronic shutter speeds periodically detected within a predetermined period. The electronic endoscope apparatus according to claim 28. The electronic shutter speed detecting means detects the electronic shutter speed at a constant time interval and stores it in a memory;
32. The electronic endoscope apparatus according to claim 31, wherein the abnormality detection unit detects an abnormality based on a series of electronic shutter speeds stored at a predetermined time interval longer than the predetermined time interval. Use detection means for determining whether or not the videoscope is used for endoscope operation;
29. The electronic endoscope apparatus according to claim 28, wherein the electronic shutter speed detection means detects an electronic shutter speed only when the video scope is used. During the automatic dimming process by the dimming means for adjusting the brightness of the subject image displayed based on the image signal read from the image sensor by adjusting the electronic shutter speed of the image sensor provided in the video scope Electronic shutter speed detection means for detecting the electronic shutter speed;
An abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the detected electronic shutter speed;
An endoscopic self-diagnosis device comprising: notifying means for notifying an abnormality detected by the abnormality detecting means. During the automatic dimming process by the dimming means for adjusting the brightness of the subject image displayed based on the image signal read from the image sensor by adjusting the electronic shutter speed of the image sensor provided in the video scope Detect the electronic shutter speed,
Based on the detected electronic shutter speed, it is detected whether or not the amount of illumination light is abnormal,
A self-diagnosis method for an endoscope, characterized by notifying a detected abnormality. During the automatic dimming process by the dimming means for adjusting the brightness of the subject image displayed based on the image signal read from the image sensor by adjusting the electronic shutter speed of the image sensor provided in the video scope Electronic shutter speed detection means for detecting the electronic shutter speed;
An abnormality detecting means for detecting whether or not the light quantity of the illumination light is abnormal based on the detected electronic shutter speed;
A program for causing a notifying means for notifying an abnormality detected by the abnormality detecting means to function. Scope,
A processor connected to the scope;
Detecting means for periodically detecting whether or not the amount of illumination light to the subject is in an abnormal state;
An endoscope apparatus comprising: a transmission unit that transmits information on an abnormal state to the outside when an abnormal state is detected.   38. The endoscope apparatus according to claim 37, wherein the detection unit determines that an abnormal state occurs when a state where the light intensity is substantially maximum exceeds a predetermined time.   38. The endoscope apparatus according to claim 37, wherein the transmission unit transmits information on an abnormal state only once or twice. Detecting means for periodically detecting whether or not the amount of illumination light to the subject is in an abnormal state during the operation after the initial setting of the endoscope apparatus;
An endoscope diagnostic apparatus, comprising: a transmission unit configured to transmit information on an abnormal state to the outside when an abnormal state is detected. Periodically detecting whether the amount of illumination light to the subject is in an abnormal state during the operation after the initial setting of the endoscope apparatus,
A diagnostic method for an endoscope, characterized in that when an abnormal state is detected, information on the abnormal state is transmitted to the outside. Detecting means for periodically detecting whether or not the amount of illumination light to the subject is in an abnormal state during the operation after the initial setting of the endoscope apparatus;
A program characterized by causing a transmission means for transmitting information on an abnormal state to the outside when an abnormal state is detected.

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