CN204542024U - A kind of LED light device and endoscope thereof being applied to endoscope - Google Patents
A kind of LED light device and endoscope thereof being applied to endoscope Download PDFInfo
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- CN204542024U CN204542024U CN201520088058.6U CN201520088058U CN204542024U CN 204542024 U CN204542024 U CN 204542024U CN 201520088058 U CN201520088058 U CN 201520088058U CN 204542024 U CN204542024 U CN 204542024U
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Abstract
The utility model discloses a kind of LED light device and the endoscope that are applied to endoscope, this illuminator comprises pwm pulse generation module, regulated power supply module and constant-current source module, wherein the input of pwm pulse generation module connects power supply, and it exports the input connecting constant-current source module; The input of regulated power supply module connects power supply, and it exports the input connecting constant-current source module; The output of constant-current source module is connected to endoscope-use LED.This utility model real-time is high, and stability is strong, and structure is simple, and cost is low, and precision is high, under different occasion being adapted to, and the various different brightness needed for endoscope's work.
Description
Technical field
This utility model relates to LED light device, particularly a kind of LED light device and endoscope thereof being applied to endoscope.
Background technology
LED light device is the important component part of endoscopic system, and the height of brightness directly has influence on the quality of image quality, and brightness is too low, and the noise of image can be more; Brightness is too high, may cause the delustring difficulty of imageing sensor; Therefore LED light device needs brightness to regulate, and working stability, the impact of variations in temperature can not be subject to, also can not be subject to the impact of change in voltage.
Conventional endoscope's LED illumination method mainly contains optical fiber light-guiding, directly on-off mode, adjustable resistor light modulation, adjustable voltage light modulation etc.; Optical fiber light-guiding general illumination brightness is not high enough and illumination range is wide not; Directly the mode of opening the light lacks the adjustable motility of brightness; Adjustable resistor light modulation is directly relevant with the resistance degree of accuracy of resistance, and resistance changed greatly with temperature and working time, and cause control accuracy inadequate, electric current flows through resistance always in addition, causes power attenuation larger; Adjustable voltage light modulation directly depends on the degree of stability of voltage, if voltage is subject to external disturbance, LED luminance directly can be caused unstable.
Utility model content
For the problem existing for existing endoscope-use illuminator, it is strong that one of the purpose of this utility model is to provide a kind of stability, and structure is simple, cost is low, precision is high, under varying environment being met, and the LED light device of the various different brightness demands needed for endoscope's work.Two of the purpose of this utility model is, based on above-mentioned LED light device, provides a kind of endoscope.
For achieving the above object, the technical solution of the utility model is as follows:
For object 1: a kind of LED light device being applied to endoscope, described LED light device comprises:
The one pwm pulse generation module exporting the PWM square-wave pulse signal of various different duty according to input signal instruction, the input of described pwm pulse generation module connects power supply, and it exports the input connecting constant-current source module;
One for generation of the regulated power supply module of LED from the various different voltage needed for other module work, and the input of described regulated power supply module connects power supply, and it exports the input connecting constant-current source module;
One produces the constant output current of varying strength according to the PWM square-wave pulse signal of different duty, and to the constant-current source module that LED luminance regulates, the output of described constant-current source module is connected to endoscope-use LED.
In the preferred version of LED light device, described endoscope-use LED is at least one.
Further, described regulated power supply module is made up of power supply chip and peripheral discrete component.
Further, described constant-current source module is made up of constant-current source chip and peripheral discrete component.
For object 2: a kind of endoscope, described endoscope comprises illuminator, cephalic par, bending section, insertion section, operating portion and camera head; Described illuminator is above-mentioned LED light device.
Further, described LED light device is placed in operating portion or camera head.
The LED light device real-time of the endoscope that this utility model provides is high, and stability is strong, and structure is simple, and cost is low, and precision is high, can meet the various different brightness demands needed for endoscope's work under varying environment.
Moreover this device, when embody rule, controls pwm pulse generation module by external signal, and pwm pulse generation module exports the pwm pulse signal of different duty by external signal instruction; Constant-current source module exports the electric current of varying strength according to the pwm pulse signal of this different duty, is regulated the brightness of LED by the electric current of the varying strength produced in real time, and it can adapt to the various different brightness under different occasion needed for endoscope's work.
Accompanying drawing explanation
In order to be illustrated more clearly in this utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the theory diagram of this utility model LED light device;
Fig. 2 is this utility model endoscope structure schematic diagram;
Numeral and the corresponding component title represented by letter in figure:
10, pwm pulse generation module 20, constant-current source module 30, LED 40, regulated power supply module 50, power supply 60, cephalic par 70, bending section 80, insertion section 90, operating portion 100, camera head.
Detailed description of the invention
The technological means realized to make this utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth this utility model further.
Shown in Figure 1, the utility model discloses a kind of LED light device being applied to endoscope, LED light device comprises LED30, the regulated power supply module be connected with constant-current source module 20 input 40 and the power supply 50 that constant-current source module 20, that a pwm pulse generation module 10, is connected with pwm pulse generation module 10 outfan is connected with constant-current source module 20 outfan.
Pwm pulse generation module 10 exports the PWM square-wave pulse signal of various different duty according to the external input signal instruction received; And the PWM square-wave pulse signal of these different duty can control constant-current source module 20 exports various different constant current.
Concrete, this pwm pulse generation module 10 is made up of corresponding processor and peripheral circuit, and its input connects power supply 50, and outfan is connected to the input of constant-current source module 20.
Regulated power supply module 40 is for the LED running voltage needed for output constant current source module 20 and the running voltage needed for pwm pulse generation module 10.This regulated power supply module 40 is specifically made up of power supply chip and peripheral discrete component, and its input is connected to power supply 50, and outfan is connected to the input of constant-current source module 20.
Constant-current source module 20, it controls the different brightness of the pwm pulse signal adjustment LED of the different duty that pwm pulse generation module exports by external signal.
Concrete, this constant-current source module 20 is made up of constant-current source chip and peripheral discrete component, its input is connected with pwm pulse generation module 10 outfan and regulated power supply module 40 outfan respectively, the LED30 that its outfan and endoscope use is connected, constant-current source module 20 receives the PWM square-wave pulse signal that pwm pulse generation module 10 transports thus, and the brightness regulation of LED30 is realized according to the constant output current of the PWM square-wave pulse signal generation varying strength of the different duty of pwm pulse generation module 10 output, and this electric current is not subject to the impact of input service change in voltage.
Power supply 50, it is responsible for whole LED light device and powers.
In the endoscope-use LED light device formed thus, pwm pulse generation module can export the PWM square-wave pulse signal of various different duty; Regulated power supply module can produce LED and the various different voltage needed for other module work; Constant-current source module can produce the constant output current of varying strength according to the PWM square-wave pulse signal of different duty, realize the brightness regulation being realized LED by external input signal thus, the operating current of LED is controlled by external signal, and constant all the time, brightness can not change along with the rising of input voltage.
Moreover this endoscope-use LED light device has wide input voltage range, wide output voltage range, can connect LED number adjustable.
In addition, relative to conventional endoscope's LED illumination method, this illuminator adopts the mode of constant current, do not rely on the change of input voltage and change, device used is all active device, does not substantially have the loss of idle work, energy efficiency is used the highest, can not variation with temperature and changing, stability is high, can meet the demands.
See Fig. 2, it is depicted as the structural representation of the endoscope adopting above-mentioned LED light device.As seen from the figure, this endoscope is made up of successively cephalic par 60, bending section 70, insertion section 80, operating portion 90 and camera head 100, and concrete composition structure is prior art, is not repeated herein.
Above-mentioned LED light device is installed in operating portion 90 or camera head 100 by this endoscope, at cephalic par 60, at least one LEDs is installed, is placed in LED light device in operating portion 90 or camera head 100 by the LED on the constant-current source module 20 control connection cephalic par 60 in it.
Meanwhile, the operation principle of LED light device is described above, is not repeated herein.In addition, LED light device is except being applied in the endoscope of the application's structure, and it can also be applied in the endoscope of other structure, does not add herein and repeats.
More than show and describe ultimate principle of the present utility model and principal character and advantage of the present utility model.The technical staff of the industry should understand; this utility model is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present utility model; under the prerequisite not departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed this utility model.The claimed scope of this utility model is defined by appending claims and equivalent thereof.
Claims (6)
1. be applied to a LED light device for endoscope, it is characterized in that, described LED light device comprises:
The one pwm pulse generation module exporting the PWM square-wave pulse signal of various different duty according to input signal instruction, the input of described pwm pulse generation module connects power supply, and it exports the input connecting constant-current source module;
One for generation of the regulated power supply module of LED from the various different voltage needed for other module work, and the input of described regulated power supply module connects power supply, and it exports the input connecting constant-current source module;
One produces the constant output current of varying strength according to the PWM square-wave pulse signal of different duty, and to the constant-current source module that LED luminance regulates, the output of described constant-current source module is connected to endoscope-use LED.
2. a kind of LED light device being applied to endoscope according to claim 1, is characterized in that, described endoscope-use LED is at least one.
3. a kind of LED light device being applied to endoscope according to claim 1, is characterized in that, described regulated power supply module is made up of power supply chip and peripheral discrete component.
4. a kind of LED light device being applied to endoscope according to claim 1, is characterized in that, described constant-current source module is made up of constant-current source chip and peripheral discrete component.
5. an endoscope, described endoscope comprises illuminator, cephalic par, bending section, insertion section, operating portion and camera head; It is characterized in that, described illuminator adopts the LED light device according to any one of claim 1-4.
6. a kind of endoscope according to claim 5, is characterized in that, described LED light device is placed in operating portion or camera head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520088058.6U CN204542024U (en) | 2015-02-09 | 2015-02-09 | A kind of LED light device and endoscope thereof being applied to endoscope |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520088058.6U CN204542024U (en) | 2015-02-09 | 2015-02-09 | A kind of LED light device and endoscope thereof being applied to endoscope |
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| CN204542024U true CN204542024U (en) | 2015-08-12 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307359A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | Control circuit and control method used for adjusting illumination brightness of airplane light guide plate |
| CN110740539A (en) * | 2019-10-30 | 2020-01-31 | 苏州卫水环保科技有限公司 | drive circuit and method for prolonging service life of LED |
-
2015
- 2015-02-09 CN CN201520088058.6U patent/CN204542024U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105307359A (en) * | 2015-12-02 | 2016-02-03 | 上海航空电器有限公司 | Control circuit and control method used for adjusting illumination brightness of airplane light guide plate |
| CN110740539A (en) * | 2019-10-30 | 2020-01-31 | 苏州卫水环保科技有限公司 | drive circuit and method for prolonging service life of LED |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: No.66, Lane 133, Guangzhong Road, Minhang District, Shanghai, 201108 Patentee after: Shanghai Aohua endoscopy Co., Ltd Address before: 201612 Shanghai City, Minhang District Jin Road, No. 2017, room 13, building 1, 4299 Patentee before: SHANGHAI AOHUA PHOTOELECTRICITY ENDOSCOPE Co.,Ltd. |