Electronic endoscope lighting system and electronic endoscope system

Abstract

The embodiment of the utility model provides an electronic endoscope lighting system and an electronic endoscope system, and relates to the technical field of endoscopes. In the electronic endoscope lighting system, an interface, a step-down module, a step-up DC / DC controller and a light source module are connected in sequence. The step-down module is used for reducing the voltage of the interface and outputting the voltage to the step-up DC / DC controller, so that the input voltage of the step-up DC / DC controller is smaller than the output voltage, and the step-up DC / DC controller can work normally.

Description

Technical Field

[0001] The present application relates to the technical field of endoscopes, and in particular to an electronic endoscope lighting system and an electronic endoscope system. Background Art

[0002] In the lighting system of an electronic endoscope, an LED driver chip is generally used to drive two white light LEDs, and a boost DC / DC chip is used as the LED driver chip. The working condition of the boost DC / DC chip is that the output voltage is greater than the input voltage. The voltage drop of a single white light LED is approximately 2.1 to 3.2V. This voltage drop is related to the current and is positively correlated with the illumination. After using two LEDs in series, the series voltage drop is 4.2 to 6.4V. When the input voltage is 5V using a USB interface, the LED driver chip does not meet its boost working conditions, the chip operates abnormally, and the LED current is uncontrollable.

[0003] Therefore, how to provide a voltage for the boost DC / DC chip to enable it to operate stably is a technical problem that needs to be solved. Utility Model Content

[0004] The purpose of the present application is to provide an electronic endoscope lighting system and an electronic endoscope system, which provide a voltage for a boost DC / DC chip to enable it to operate stably.

[0005] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions.

[0006] In a first aspect, an embodiment of the present application provides an electronic endoscope lighting system, comprising an interface, a step-down module, a step-up DC / DC controller, and a light source module;

[0007] The interface, the step-down module, the step-up DC / DC controller and the light source module are connected in sequence;

[0008] The step-down module is used to reduce the voltage of the interface and output it to the boost DC / DC controller so that the input voltage of the boost DC / DC controller is lower than the output voltage of the boost DC / DC controller. The output voltage of the step-down module can be set to be lower than the minimum value of the voltage drop range of the light source module.

[0009] Compared with the prior art, this application has the following beneficial effects:

[0010] In the electronic endoscope lighting system provided in an embodiment of the present application, the step-down module reduces the voltage of the interface to below the output voltage of the boost DC / DC controller, or below the voltage drop of the light source module, so that the input voltage of the boost DC / DC controller is lower than the output voltage of the boost DC / DC controller, thereby enabling the boost DC / DC controller to operate normally.

[0011] Optionally, the electronic endoscope lighting system further comprises a microcontroller;

[0012] The first output terminal of the microcontroller is connected to the boost DC / DC controller;

[0013] The microcontroller is used to output a PWM signal to the boost DC / DC controller to adjust the brightness of the light source module. Stepless dimming can be achieved through PWM.

[0014] Optionally, the electronic endoscope lighting system further includes a power control switch;

[0015] The interface, the step-down module, the power control switch, the step-up DC / DC controller and the light source module are connected in sequence;

[0016] The power control switch is used to turn on or off the connection between the step-down module and the step-up DC / DC controller.

[0017] Optionally, the second output terminal of the microcontroller is connected to the control terminal of the power control switch;

[0018] The microcontroller is used to output a switch signal to control the on or off of the power control switch.

[0019] Optionally, the light source module includes a plurality of LEDs connected in series.

[0020] Optionally, the plurality of LEDs are evenly distributed around the objective lens to achieve uniform illumination.

[0021] Optionally, the interface is a USB interface.

[0022] Optionally, the boost DC / DC controller is a LN2115 series driver chip.

[0023] In a second aspect, an embodiment of the present application provides an electronic endoscope system, which includes a host and the electronic endoscope lighting system of the first aspect, wherein an interface of the host is connected to an interface of the electronic endoscope lighting system.

[0024] Optionally, the electronic endoscope system further includes a video camera module; the electronic endoscope lighting system further includes a microcontroller;

[0025] The first output terminal of the microcontroller is connected to the boost DC / DC controller;

[0026] The microcontroller is used to output a PWM signal to the boost DC / DC controller to adjust the brightness of the light source module;

[0027] The microcontroller is connected to the video camera module, the video signal interface of the host is connected to the video camera module, and the digital signal interface of the host is connected to the microcontroller. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 A schematic diagram of an electronic endoscope lighting system provided in an embodiment of the present application;

[0030] Figure 2 A schematic diagram of an electronic endoscope lighting system with a microcontroller provided in an embodiment of the present application;

[0031] Figure 3 A schematic diagram of an electronic endoscope lighting system with a power control switch provided in an embodiment of the present application;

[0032] Figure 4 A schematic diagram of an electronic endoscope lighting system with a power control switch and a microcontroller provided in an embodiment of the present application;

[0033] Figure 5 A schematic diagram of a microcontroller controlling a power control switch and a boost DC / DC controller simultaneously provided by an embodiment of the present application;

[0034] Figure 6 A schematic diagram of an electronic endoscope lighting system including two LEDs connected in series provided in an embodiment of the present application;

[0035] Figure 7 A schematic diagram of the position of an LED on an endoscope provided in an embodiment of the present application;

[0036] Figure 8 A schematic diagram of an electronic endoscope system provided in an embodiment of the present application.

[0037] Description of reference numerals:

[0038] 1 Interface

[0039] 2 Buck Module

[0040] 3 Boost DC / DC Controller

[0041] 4 Light source module

[0042] 5. Microcontroller

[0043] 6 Power control switch

[0044] 7 Endoscope

[0045] 8 channels

[0046] 9 Objective lens

[0047] 10 LED

[0048] 11 Host Interaction Unit

[0049] 12 Video camera module

[0050] 13 Electronic endoscope lighting system

[0051] 14 Host

[0052] 15 Display

[0053] 16 Keyboard and mouse

[0054] 17 ISP image processing circuit

[0055] 18 Camera unit sensor DETAILED DESCRIPTION

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. The described embodiments are part of the embodiments of the present application, but not all of the embodiments. Generally, the components of the embodiments of the present application described in the drawings herein can be arranged and designed in various different configurations.

[0057] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is claimed, but rather merely represents selected embodiments of the present application. All other embodiments derived by persons of ordinary skill in the art based on the embodiments in this application without creative effort are intended to fall within the scope of protection of this application. The following embodiments and features therein may be combined with each other unless there is a conflict.

[0058] In the description of this application, it should be noted that relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations.

[0059] “Connection” should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0060] When using a boost DC / DC chip as an LED driver chip, the output voltage of the boost DC / DC chip must be greater than the input voltage so that the boost DC / DC chip can work properly.

[0061] The output voltage of the boost DC / DC chip is affected by the voltage drop of the LED. If the input voltage is 5V, and the output voltage of the boost DC / DC chip is the voltage drop of two white light LEDs connected in series, the voltage drop of a single LED is about 2.1 to 3.2V, and the voltage drop of the series connection is 4.2 to 6.4V. The voltage drop of the series connection may not meet the working conditions of the boost DC / DC chip.

[0062] To solve the above problems, please refer to Figure 1 The embodiment of the present application provides an electronic endoscope lighting system, including an interface 1, a buck module 2, a boost DC / DC controller 3, and a light source module 4. The interface 1, the buck module 2, the boost DC / DC controller 3, and the light source module 4 are connected in sequence.

[0063] The interface 1 may be a USB interface. Through the USB interface, the voltage of the USB port on the host can be used as a power source, thereby facilitating the acquisition of power.

[0064] The step-down module 2 is used to reduce the voltage of the interface 1 and output it to the boost DC / DC controller 3. The step-down module 2 makes the input voltage of the boost DC / DC controller 3 smaller than the voltage drop of the light source module 4, and the input voltage of the boost DC / DC controller 3 smaller than the output voltage, so that the boost DC / DC controller 3 can operate normally.

[0065] The step-down module 2 can be configured to reduce the voltage of the interface 1 to below the minimum value of the voltage drop range of the light source module 4, and output the voltage to the boost DC / DC controller 3. The input voltage of the boost DC / DC controller 3 is less than the minimum value of the voltage drop range of the light source module 4, which can better ensure the normal operation of the boost DC / DC controller 3.

[0066] The boost DC / DC controller 3 may adopt an LN2115 series driver chip, which has an overvoltage protection function.

[0067] The brightness of the LED can be controlled by applying a PWM signal to the boost DC / DC controller 3. The current is adjusted according to the duty cycle of the PWM signal. The higher the duty cycle, the greater the average output current or voltage, thereby changing the brightness of the LED.

[0068] PWM can achieve stepless dimming. In addition, combined with control software, the endoscope lighting system can adaptively adjust the LED brightness according to the exposure level of the image.

[0069] like Figure 2 The electronic endoscope lighting system may include a microcontroller 5. The microcontroller 5 may be a single chip microcomputer. A first output terminal of the microcontroller 5 is connected to the boost DC / DC controller 3.

[0070] The microcontroller 5 is configured to output a PWM signal to the boost DC / DC controller 3 to adjust the brightness of the light source module 4 .

[0071] When using the LN2115 series driver chip, the PWM signal is connected to the CE pin of the LN2115 series driver chip. The minimum dimming of the PWM dimming of the LN2115 series driver chip is 5%, and the maximum dimming frequency is 100KHZ.

[0072] like Figure 3 The electronic endoscope lighting system may further include a power control switch 6, which facilitates turning off the LED light source module when the light source is not needed. The interface 1, the step-down module 2, the power control switch 6, the step-up DC / DC controller 3, and the light source module 4 are connected in sequence.

[0073] The power control switch 6 is used to switch on or off the connection between the step-down module 2 and the step-up DC / DC controller 3 .

[0074] The power control switch 6 can be a mechanical switch or an electronic switch. When the power control switch 6 is an electronic switch, it can be controlled by the microcontroller 5. Figure 4 ,exist Figure 3 On the basis of the electronic endoscope lighting system, the electronic endoscope lighting system further includes a microcontroller 5.

[0075] The second output terminal of the microcontroller 5 is connected to the control terminal of the power control switch 6 ; the microcontroller 5 is used to output a switch signal to control the power control switch 6 to be turned on or off.

[0076] like Figure 5 The boost DC / DC controller 3 and the power control switch 6 share a microcontroller 5. The microcontroller 5 controls the boost DC / DC controller 3 and the power control switch 6 simultaneously. The first output end of the microcontroller 5 is connected to the boost DC / DC controller 3, and the second output end of the microcontroller 5 is connected to the power control switch 6.

[0077] The light source module 6 may include a plurality of LEDs connected in series, and the plurality of LEDs are evenly distributed around the objective lens to achieve uniform illumination. Figure 6 The light source module 4 includes an embodiment in which two LEDs are connected in series, the output end of the boost DC / DC controller 3 is connected to the anode of the first LED, the cathode of the first LED is connected to the anode of the second LED, and the cathode of the second LED is connected to the feedback pin of the boost DC / DC controller 3 or ground.

[0078] The voltage drop of a single LED ranges from 2.1 to 3.2V. This voltage drop is related to current and positively correlated with illumination. When two LEDs are connected in series, the overall voltage drop ranges from 4.2 to 6.4V. Therefore, the output voltage of step-down module 2 can be set to within 4.2V.

[0079] The introduction of the step-down module 2 enables the circuit to be adapted to more types of LEDs and has greater applicability.

[0080] Two LEDs can be placed symmetrically on an endoscope, for example, on either side of the objective lens. This allows the lens to receive more uniform light. If both LEDs are placed on one side of the objective lens, one side will be brighter and the other side will be less bright. If only one LED is placed on one side of the objective lens, the same problem of brighter light on one side and less bright light on the other side will occur. Placing the two LEDs symmetrically on either side of the objective lens can avoid this problem.

[0081] Two LEDs can be symmetrically arranged on both sides of the endoscope channel to symmetrically illuminate the situation in front of the channel. Figure 7 , Figure 7 The diagram shows the position of the LED on the endoscope. The channel 8 and the objective lens 9 are symmetrically arranged on the endoscope 7. The two LEDs 10 are arranged on both sides of the channel 8 and the objective lens 9. The channel 8, the objective lens 9 and the two LEDs 10 are symmetrical about an axis of symmetry.

[0082] Based on the above embodiments, the embodiments of the present application further provide an electronic endoscope system, which includes a host and the above electronic endoscope lighting system, wherein the USB interface of the host is connected to the USB interface of the electronic endoscope lighting system.

[0083] Figure 8 An embodiment of an electronic endoscope system is shown. The electronic endoscope system includes a host interaction unit 11, a video camera module 12, a microcontroller 5, and an electronic endoscope lighting system 13. The microcontroller 5 can be a single-chip microcomputer. The host interaction unit 11 includes a host 14, a display 15, and a keyboard and mouse 16. The video camera module 12 includes an ISP image processing circuit 17 and a camera unit sensor 18.

[0084] The microcontroller 5 is connected to the video camera module 12 , the video signal interface of the host 14 is connected to the video camera module 12 , and the digital signal interface of the host is connected to the microcontroller 5 .

[0085] The camera sensor 18 captures images. The ISP image processing circuit 17 communicates with the host computer 14 via video signals, and the ISP image processing circuit 17 communicates with the microcontroller 5 via digital signals. The microcontroller 5 communicates with the host computer 14 via digital signals. The microcontroller 5 sends a switching signal to the power control switch 6 to control its on / off state. The microcontroller 5 then sends a PWM signal to the boost DC / DC controller 3 to adjust the brightness of the LED.

[0086] In general, this application proposes an electronic endoscope lighting system and an electronic endoscope system. In the electronic endoscope lighting system, an interface, a buck module, a boost DC / DC controller, and a light source module are connected in sequence. The buck module is used to reduce the voltage of the interface and output it to the boost DC / DC controller, so that the input voltage of the boost DC / DC controller is lower than the output voltage, thereby enabling the boost DC / DC controller to operate normally.

[0087] The above-described device and system embodiments are merely illustrative, and some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment. Those skilled in the art may understand and implement the present invention without inventive effort.

[0088] The above are merely preferred embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. An electronic endoscope lighting system, characterized in that: Includes interface, buck module, boost DC / DC controller and light source module; The interface, the step-down module, the step-up DC / DC controller and the light source module are connected in sequence; The step-down module is used to reduce the voltage of the interface and output the reduced voltage to the boost DC / DC controller, so that the input voltage of the boost DC / DC controller is less than the voltage drop of the light source module.

2. The electronic endoscope lighting system according to claim 1, wherein: The electronic endoscope lighting system also includes a microcontroller; The first output terminal of the microcontroller is connected to the boost DC / DC controller; The microcontroller is used to output a PWM signal to the boost DC / DC controller to adjust the brightness of the light source module.

3. The electronic endoscope lighting system according to claim 1, wherein: The electronic endoscope lighting system also includes a power control switch; The interface, the step-down module, the power control switch, the step-up DC / DC controller and the light source module are connected in sequence; The power control switch is used to turn on or off the connection between the step-down module and the step-up DC / DC controller.

4. The electronic endoscope lighting system according to claim 3, wherein: The electronic endoscope lighting system also includes a microcontroller; The second output terminal of the microcontroller is connected to the control terminal of the power control switch; The microcontroller is used to output a switch signal to control the on or off of the power control switch.

5. The electronic endoscope lighting system according to claim 1, wherein: The light source module includes a plurality of LEDs connected in series.

6. The electronic endoscope lighting system according to claim 5, wherein: The plurality of LEDs are arranged on the peripheral side of the objective lens.

7. The electronic endoscope lighting system according to claim 1, wherein: The interface is a USB interface.

8. The electronic endoscope lighting system according to claim 1, wherein: The boost DC / DC controller is a LN2115 series driver chip.

9. An electronic endoscope system, characterized in that: The electronic endoscope system includes a host computer and the electronic endoscope lighting system according to any one of claims 1 to 8, wherein an interface of the host computer is connected to an interface of the electronic endoscope lighting system.

10. The electronic endoscope system according to claim 9, wherein: The electronic endoscope system further includes a video camera module; the electronic endoscope lighting system further includes a microcontroller; The first output terminal of the microcontroller is connected to the boost DC / DC controller; The microcontroller is used to output a PWM signal to the boost DC / DC controller to adjust the brightness of the light source module; The microcontroller is connected to the video camera module, the video signal interface of the host is connected to the video camera module, and the digital signal interface of the host is connected to the microcontroller.

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