Endoscope and LED lighting device thereof

Abstract

The invention relates to the technical field of imaging spectrum lighting, in particular to an endoscope and an LED lighting device thereof. The LED lighting device comprises an LED light source, and the LED light source can emit narrow-band purple light waves with the peak wavelength range of 400-440 nm and the half-peak width smaller than 40 nm. The narrow-band green light wave with the peak wavelength range of 530-550 nm and the half-peak width of less than 80 nm can be emitted; and narrow-band red light waves with the peak wavelength range of 610-680 nm and the half-peak width of less than 120 nm can be emitted. When the lighting device is used, the LED light source is controlled by the light source controller to emit narrowband light waves with at least two colors at the same time, and when the LED light source forming a special spectrum illuminates an imaging object containing a specific substance to carry out color imaging, the specificity of the specific substance in an image is more obvious; the target imaging substance can be distinguished from other substances more easily, the specificity or contrast of the target imaging substance in the image can be enhanced, and the effect of enhancing imaging of the target substance is achieved.

Description

Technical Field

[0001] The present application relates to the field of imaging spectrum lighting technology, and in particular to an endoscope and an LED lighting device thereof. Background Art

[0002] At present, in order to pursue higher color rendering, existing LED lighting devices mostly use conventional white light LEDs, whose emission spectrum is continuous in the 380nm-780nm band. When conventional white light LEDs are used for imaging illumination using image sensors with three color response channels of red, green and blue, some bands in their emission spectrum will be simultaneously responded to by two color response channels. Therefore, when an image sensor with three color response channels of red, green and blue is imaging, the use of conventional continuous spectrum white light LEDs, especially high color rendering white light LED light sources, is beneficial to conventional color imaging illumination, but is not conducive to imaging illumination that requires distinguishing specific colors. Summary of the invention

[0003] An endoscope and an LED lighting device thereof provided in the present application effectively solve the problem that the lighting devices in the prior art cannot clearly distinguish imaging lighting of a specific color when there are specific needs.

[0004] According to a first aspect, an embodiment provides an LED lighting device for an endoscope, comprising an LED light source and a light source controller;

[0005] The LED light source is used to emit narrow-band violet light waves, narrow-band green light waves and / or narrow-band red light waves; the peak wavelength range of the narrow-band violet light waves is 400-440nm, and the half-peak width is less than 40nm; the peak wavelength range of the narrow-band green light waves is 530-550nm, and the half-peak width is less than 80nm; the peak wavelength range of the narrow-band red light waves is 610-680nm, and the half-peak width is less than 120nm;

[0006] The light source controller is electrically connected to the LED light source, and is used to control the LED light source to emit two or three colors of narrow-band light waves simultaneously.

[0007] In an achievable embodiment, the LED light source includes at least one purple semiconductor light-emitting chip; a phosphor layer is provided on the outer surface of the purple semiconductor light-emitting chip, and the phosphor layer contains narrow-band green phosphor and / or narrow-band red phosphor.

[0008] In an achievable implementation, the emission peak wavelength of the purple semiconductor light-emitting chip is in the range of 400-440 nm, and the half-width is less than 40 nm. The emission peak wavelength of the narrow-band green phosphor is 530-550 nm, and the half-width is less than 70 nm. The emission peak wavelength of the narrow-band red phosphor is 610-680 nm, and the half-width is less than 110 nm.

[0009] In one feasible implementation, the peak energy proportion of the narrow-band purple light wave is the highest; and the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band green light wave, and / or the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band red light wave.

[0010] According to a second aspect, an embodiment provides an LED lighting device for an endoscope, comprising an LED light source and a light source controller;

[0011] The LED light source is used to emit narrow-band violet light waves, narrow-band green light waves and / or narrow-band red light waves; the peak wavelength range of the narrow-band violet light waves is 400-440nm, and the half-peak width is less than 40nm; the peak wavelength range of the narrow-band green light waves is 530-550nm, and the half-peak width is less than 50nm; the peak wavelength range of the narrow-band red light waves is 610-680nm, and the half-peak width is less than 50nm;

[0012] The light source controller is electrically connected to the LED light source, and is used to control the LED light source to simultaneously emit narrow-band light waves of one, two or three colors.

[0013] In one feasible implementation, the LED light source includes a purple semiconductor light-emitting chip, a green semiconductor light-emitting chip and / or a red semiconductor light-emitting chip; the purple semiconductor light-emitting chip is used to emit the narrow-band purple light wave, the green semiconductor light-emitting chip is used to emit the narrow-band green light wave, and the red semiconductor light-emitting chip is used to emit the narrow-band red light wave.

[0014] In an achievable implementation, the purple semiconductor light emitting chip, the green semiconductor light emitting chip and / or the red semiconductor light emitting chip are arranged adjacent to each other inside the LED light source, and a gap between two adjacent light emitting chips is less than twice the size of the light emitting chip.

[0015] In one feasible implementation, the peak energy proportion of the narrow-band purple light wave is the highest, and the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band green light wave, and / or the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band red light wave.

[0016] According to the third aspect, an embodiment provides an endoscope, wherein the endoscope adopts the LED lighting device as described above, and the LED light source is disposed at the leading end of the endoscope body.

[0017] In a feasible implementation, the LED light source is disposed at a leading end of the endoscope body.

[0018] In a feasible embodiment, the distal end of the endoscope body is further provided with an RGB image sensor, and the RGB image sensor is used to receive the illumination light reflected after the LED light source irradiates the target tissue, and to perform imaging based on the reflected illumination light.

[0019] According to the LED lighting device for endoscopes of the above embodiment, the LED light source can emit a narrowband purple light wave with a peak wavelength range of 400-440nm and a half-width less than 40nm; it can also emit a narrowband green light wave with a peak wavelength range of 530-550nm and a half-width less than 80nm; it can also emit a narrowband red light wave with a peak wavelength range of 610-680nm and a half-width less than 120nm. When using the lighting device of the present application, the LED light source is controlled by the light source controller to simultaneously emit narrowband light waves of two or more colors, and the LED light source with a special spectrum is formed to illuminate the imaging object containing a specific substance for color imaging, which will make the specificity of the specific substance in the image more obvious and easier to be distinguished from other substances, which can enhance the specificity or contrast of the target imaging substance in the image, and achieve the effect of enhancing the imaging of the target substance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of the LED lighting device provided in this embodiment;

[0021] Figure 2 A graph of peak wavelength and energy of a special spectrum light wave provided for this embodiment;

[0022] Figure 3 is a curve diagram showing the relationship between the special spectrum emitted by the LED light source of this embodiment and the RGB response spectrum of the image sensor;

[0023] Figure 4 A structural schematic diagram when the LED light source provided in this embodiment is a purple semiconductor light emitting chip;

[0024] Figure 5 Another structural schematic diagram when the LED light source provided in this embodiment is a purple semiconductor light emitting chip;

[0025] Figure 6A schematic diagram of the structure when the LED light source provided in this embodiment is a purple semiconductor light emitting chip, a red semiconductor light emitting chip and a green semiconductor light emitting chip.

[0026] Figure numerals: 10, LED light source; 11, purple light semiconductor light-emitting chip; 12, phosphor layer; 13, narrow-band red light phosphor layer; 14, narrow-band green light phosphor layer; 15, green light semiconductor light-emitting chip; 16, red light semiconductor light-emitting chip; 20, light source controller; 30, RGB image sensor; 40, tip end. DETAILED DESCRIPTION

[0027] The present application is further described in detail below by specific embodiments in conjunction with the accompanying drawings. Wherein similar elements in different embodiments adopt associated similar element numbers. In the following embodiments, many detailed descriptions are intended to enable the present application to be better understood. However, those skilled in the art can easily recognize that some of the features can be omitted in different situations, or can be replaced by other elements, materials, and methods. In some cases, some operations related to the present application are not shown or described in the specification, in order to avoid the core part of the present application being overwhelmed by too much description, and for those skilled in the art, it is not necessary to describe these related operations in detail, and they can fully understand the related operations based on the description in the specification and the general technical knowledge in the art.

[0028] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various implementations, and the operation steps involved in each embodiment can also be replaced or adjusted in a sequence in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing a certain embodiment and do not mean that the composition and / or sequence are necessary.

[0029] The serial numbers of the components in this document, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings).

[0030] In order to perceive colors, conventional color imaging sensors use a filter system based on the principle of tristimulus values ​​in front of the sensor's photosensitive area to distinguish different colors to achieve color imaging. Therefore, when a conventional color imaging sensor uses an RGB filter system, its B color area represents the blue response channel, which has a higher response in the 380nm-520nm band; its G color area represents the green response channel, which has a higher response in the 460nm-610nm band; its R color area represents the red response channel, which has a higher response in the 580nm-800nm ​​band. It can be seen that the blue response channel and the green response channel have more response overlap in the 470nm-520nm band, and the green response channel and the red response channel have more response overlap in the 580nm-610nm band. When existing white light LEDs are used for imaging illumination using image sensors with three color response channels of red, green and blue, some bands in their emission spectrum will be simultaneously responded to by two color response channels. Therefore, when imaging using image sensors with three color response channels of red, green and blue, conventional continuous spectrum white light LEDs, especially high color rendering white light LED light sources, are not conducive to imaging illumination that requires distinguishing specific colors.

[0031] In view of this, the present application proposes an LED lighting device for an endoscope, which can be used for color imaging lighting, especially color imaging lighting using an image sensor with red, green and blue three-color response channels. Specifically, the endoscope and its LED lighting device are described in detail in the following embodiments.

[0032] Example 1

[0033] like Figure 1 As shown, the present embodiment provides an LED lighting device for an endoscope, comprising an LED light source 10 and a light source controller 20. The LED light source 10 is used to emit narrow-band violet light waves, narrow-band green light waves and / or narrow-band red light waves; the peak wavelength range of the narrow-band violet light waves is 400-440nm, and the half-peak width is less than 40nm; the peak wavelength range of the narrow-band green light waves is 530-550nm, and the half-peak width is less than 80nm; the peak wavelength range of the narrow-band red light waves is 610-680nm, and the half-peak width is less than 120nm; the light source controller 20 is electrically connected to the LED light source 10, and the light source controller 20 is used to control the LED light source 10 to simultaneously emit narrow-band light waves of two or more colors, specifically to emit narrow-band light waves of two or three colors.

[0034] The wavelength range of the narrowband purple light waves emitted by the LED light source 10 of this embodiment is mainly within the response band of the blue response channel of the color image sensor, the wavelength range of the narrowband green light waves emitted is mainly within the response band of the green response channel of the color image sensor, and the wavelength range of the narrowband red light waves emitted is mainly within the response band of the red response channel of the color image sensor. Specifically, since the peak wavelength range of the narrowband purple light waves of this embodiment is 400-440nm, and the half-peak width is less than 40nm; the peak wavelength range of the narrowband green light waves is 530-550nm, and the half-peak width is less than 80nm; the peak wavelength range of the narrowband red light waves is 610-680nm, and the half-peak width is less than 120nm. Therefore, it can be seen that the narrowband purple light waves, narrowband green light waves, and narrowband red light waves emitted by the LED light source 10 of this embodiment have little overlap between the blue, green, and red response channels of the image sensor.

[0035] When in use, the light source controller 20 controls the LED light source 10 to emit narrow-band purple light waves and narrow-band green light waves at the same time; or controls the LED light source 10 to emit narrow-band purple light waves, narrow-band green light waves and narrow-band red light waves at the same time; or controls the LED light source 10 to emit narrow-band purple light waves, narrow-band green light waves, narrow-band red light waves and other narrow-band light waves at the same time, so as to form this special spectrum LED light source 10. When the LED light source 10 with this special spectrum is used for color imaging, if the characteristic peak of the reflection or absorption spectrum of the specific substance contained in the imaged object overlaps or partially overlaps with the emission spectrum of the LED light source 10 with the special spectrum, since the emission spectrum of the LED light source 10 does not overlap significantly between the red, green and blue response channels of the image sensor, when imaging, the specificity of these specific substances in the image is more obvious and it is easier to be distinguished from other substances. Therefore, when using the LED light source 10 with a special spectrum emitted by the LED lighting device of the present application for illumination imaging, adjusting the characteristic peak and half-peak width of the spectrum of the LED light source 10 within the corresponding band according to the absorption or reflection spectral characteristics of the target imaging material can enhance the specificity or contrast of the target imaging material in the image, thereby achieving the effect of enhanced imaging of the target material.

[0036] Furthermore, the above-mentioned LED light source 10 includes at least one purple semiconductor light emitting chip 11; the outer surface of the purple semiconductor light emitting chip 11 is provided with a phosphor layer 12, and the phosphor layer 12 contains narrow-band green phosphor and / or narrow-band red phosphor. In addition, the emission peak wavelength of the purple semiconductor light emitting chip is in the range of 400-440nm, and the half-peak width is less than 40nm, the emission peak wavelength of the narrow-band green phosphor is 530-550nm, and the half-peak width is less than 70nm, and the emission peak wavelength of the narrow-band red phosphor is 610-680nm, and the half-peak width is less than 110nm.

[0037] like Figure 4 As shown, in actual application of this embodiment, the LED light source 10 may include a purple semiconductor light-emitting chip 11, wherein the purple semiconductor light-emitting chip 11 may be a purple LED chip, and a phosphor layer 12 is covered on the upper surface of the chip, and the phosphor layer 12 contains narrow-band green phosphor and / or narrow-band red phosphor.

[0038] Specifically, the phosphor layer 12 may be formed by mixing narrow-band green phosphor and narrow-band red phosphor. Figure 4 The fluorescent layer 12 shown. It can also be Figure 5 In the structure shown, the narrow-band green phosphor layer 14 and the narrow-band red phosphor layer 13 are stacked from bottom to top on the purple semiconductor light-emitting chip 11. When the light source controller 20 controls the purple semiconductor light-emitting chip 11 to emit light, the narrow-band purple light wave sequentially excites the narrow-band green phosphor layer 14 and the narrow red and green phosphor layer 13 to emit special spectrum light waves. The positions of the narrow-band green phosphor layer 14 and the narrow-band red phosphor layer 13 can be swapped and can be set according to actual needs.

[0039] Alternatively, the outer surface of the purple semiconductor light emitting chip 11 may be half covered with the narrow-band green phosphor layer 14 and the other half covered with the narrow-band red phosphor layer 13. The narrow-band purple light wave excites the narrow-band red phosphor layer 13 and the narrow-band green phosphor layer 14 to emit special spectrum light waves.

[0040] As an implementation mode of this embodiment, the LED light source 10 can also include two purple semiconductor light-emitting chips 11; a phosphor layer 12 is arranged on the outer surface of one of the purple semiconductor light-emitting chips 11; and a narrow-band green light phosphor layer 14 or a narrow-band red light phosphor layer 13 is arranged on the outer surface of the other purple semiconductor light-emitting chip 11.

[0041] Specifically, when the LED light source 10 of this embodiment includes two purple semiconductor light-emitting chips 11, a phosphor layer 12 is set on the upper surface of one of the purple semiconductor light-emitting chips 11. The setting method can refer to the embodiment in which the above-mentioned LED light source 10 includes one purple semiconductor light-emitting chip 11, and this embodiment will not be described in detail here. A narrow-band green phosphor layer 14 or a narrow-band red phosphor layer 13 is set on the upper surface of the other purple semiconductor light-emitting chip 11. When the light source controller 20 controls the purple semiconductor light-emitting chip 11 to emit light, the narrow-band purple light wave can excite the green phosphor layer alone, or the narrow-band purple light wave can excite the red phosphor layer alone, so as to generate a special spectrum light wave composed of a mixture of light waves of multiple different colors.

[0042] In addition, the narrow-band green phosphor in the present embodiment can be one or more of aluminate green phosphor, phosphate green phosphor, oxyhalide green phosphor, nitrogen oxide green phosphor, silicate green phosphor, and nitride green phosphor; the narrow-band red phosphor layer can be one or more of nitride red phosphor, sulfide red phosphor, and fluoride red phosphor.

[0043] When the light source controller 20 controls the purple semiconductor light-emitting chip 11 to emit light, after the narrow-band purple light wave irradiates the phosphor layer 12, the narrow-band green light phosphor in the phosphor layer 12 is excited to emit a narrow-band green light wave, and the narrow-band red light phosphor in the phosphor layer 12 is excited to emit a narrow-band red light wave, thereby forming a special spectrum light wave through the mixture of narrow-band purple light wave, narrow-band green light wave and narrow-band red light wave.

[0044] Due to the limitations of the peak positions and half-peak widths of violet light or blue light, green light and red light, the spectrum of the special spectrum LED light source 10 of this embodiment is discontinuous or has typical peaks and troughs in the visible light range of 380nm-780nm.

[0045] As a specific implementation, the emission peak wavelength of the purple semiconductor light-emitting chip 11 is 420nm, the emission peak wavelength of the narrow-band green phosphor is 545nm, and the emission peak wavelength of the narrow-band red phosphor is 660nm; wherein the half-peak width of the narrow-band green phosphor is 50nm, and the half-peak width of the narrow-band red phosphor is 100nm. Specifically, the special spectrum LED light source 10 can use a 420nm purple semiconductor light-emitting chip 11, and a phosphor layer 12 covered with a mixture of a narrow-band green phosphor with a peak wavelength of 545nm and a half-peak width of about 50nm and a narrow-band red phosphor with a peak wavelength of 660nm and a half-peak width of about 100nm. The light source spectrum is as follows: Figure 2 The relationship between the special spectrum emitted by the special spectrum LED light source 10 and the response spectrum of the RGB response channel of the image sensor is as follows: Figure 3 shown.

[0046] Furthermore, considering that the blue response channel, the green response channel, and the red response channel of the image sensor have different responsiveness to light intensity, the peak energy proportions of the narrow-band purple light wave, the narrow-band green light wave, and the narrow-band red light wave emitted by the LED light source 10 can be Figure 2 In some implementations, the proportion of the three light peak energies can be adjusted by the concentration of the phosphor in the phosphor layer. If the proportion of the energy of the narrow-band green light wave or the narrow-band red light wave needs to be reduced, the concentration of the corresponding phosphor is reduced. If the proportion of the energy of the green light wave or the narrow-band red light wave needs to be increased, the concentration of the corresponding phosphor is increased.

[0047] In a specific implementation, considering that the half-width of the narrow-band purple light wave is narrower than the half-width of the narrow-band green light wave, and the blue response channel of the image sensor usually has a lower responsiveness, preferably, the peak energy proportion of the narrow-band purple light wave is the highest in the spectrum, that is, the highest peak wavelength of the entire spectrum is located in the narrow-band purple light band.

[0048] In endoscope applications, preferably, the peak height of the narrowband violet light wave is greater than 1.2 times the peak height of the narrowband green light wave, and the peak height of the narrowband violet light wave is greater than 1.2 times the peak height of the narrowband red light wave. For example, when the peak height of the narrowband red light wave and / or the green light wave is 0.8, the peak height of the narrowband violet light wave may be 1.

[0049] It should be noted that the semiconductor light emitting chips in this embodiment can all be LED chips.

[0050] Example 2

[0051] refer to Figure 1 and Figure 6 The present embodiment provides an LED lighting device for an endoscope, comprising an LED light source 10 and a light source controller 20. The LED light source 10 is used to emit narrow-band violet light waves, narrow-band green light waves and / or narrow-band red light waves; the peak wavelength range of the narrow-band violet light waves is 400-440nm, and the half-peak width is less than 40nm; the peak wavelength range of the narrow-band green light waves is 530-550nm, and the half-peak width is less than 50nm; the peak wavelength range of the narrow-band red light waves is 610-680nm, and the half-peak width is less than 50nm; the light source controller 20 is electrically connected to the LED light source 10, and the light source controller 20 is used to control the LED light source 10 to simultaneously emit one, two or three colors of narrow-band light waves.

[0052] The LED light source 10 of this embodiment is used to emit a narrow-band purple light wave with a peak wavelength range of 400-440nm and a half-width less than 40nm under the control of the light source controller 20; it can also emit a narrow-band green light wave with a peak wavelength range of 530-550nm and a half-width less than 50nm; it can also emit a narrow-band red light wave with a peak wavelength range of 610-680nm and a half-width less than 50nm. Compared with Example 1, the half-width of the narrow-band purple light wave, narrow-band green light wave and narrow-band red light wave of this embodiment is narrower. Since the narrow-band purple light wave of this embodiment is emitted by the purple semiconductor light-emitting chip 11, the narrow-band green light wave is emitted by the green semiconductor light-emitting chip 15, and the narrow-band red light wave is emitted by the red semiconductor light-emitting chip 16, the LED chip can emit narrow-band light with a smaller half-width.

[0053] Since narrow-band purple light waves, narrow-band green light waves, and narrow-band red light waves are emitted by different semiconductor light-emitting chips, respectively, the need to mix the above-mentioned different narrow-band color light waves requires optimization of the arrangement of the semiconductor light-emitting chips.

[0054] Furthermore, in this embodiment, the purple semiconductor light emitting chip 11, the green semiconductor light emitting chip 15 and / or the red semiconductor light emitting chip 16 are arranged adjacent to each other inside the LED light source, and the gap between two adjacent light emitting chips is less than 2 times the size of the light emitting chip. The smaller the gap between the light emitting chips, the tighter the arrangement of the light emitting chips, the smaller the light emitting area of ​​the LED light source 10, and the more uniform the mixing of the emitted light waves of different colors within a short distance, which is conducive to the spatial color uniformity of the illumination at a short distance.

[0055] Furthermore, considering that the blue response channel, the green response channel, and the red response channel of the image sensor have different responsiveness to light intensity, the peak energy proportions of the narrow-band purple light wave, the narrow-band green light wave, and the narrow-band red light wave emitted by the LED light source 10 can be Figure 2 The three light peak energy proportions shown may be equal or unequal. In some implementations, the three light peak energy proportions can be adjusted by adjusting the luminous power of the three semiconductor light-emitting chips. If the energy proportion of a certain narrow-band light wave needs to be reduced, the luminous power of the corresponding light-emitting semiconductor chip is reduced. If the energy proportion of a certain narrow-band light wave needs to be increased, the luminous power of the corresponding light-emitting semiconductor chip is increased. The luminous power can be changed by changing the size of the light-emitting chip, the driving current or the driving voltage. In a specific implementation, considering that the half-peak width of the narrow-band purple light wave is narrower than the half-peak width of the narrow-band green light wave, and the responsiveness of the blue response channel of the image sensor is usually lower, preferably, the peak energy proportion of the narrow-band purple light wave is the highest in the spectrum, that is, the highest peak wavelength of the entire spectrum is located in the narrow-band purple light band. In endoscope applications, the peak height of the preferred narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band green light wave and / or the narrow-band red light wave.

[0056] Example 3

[0057] This embodiment provides an endoscope, which uses the LED lighting device in the above-mentioned embodiment 1 or embodiment 2. Figure 1In actual application, the LED light source 10 in the LED lighting device is set at the front end 40 of the endoscope body. Because the illumination light emitted by the LED light source 10 does not need to be transmitted through the optical fiber but can directly illuminate the target tissue position, so that the light energy loss is minimized; considering that the endoscope body is often bent in the human body during use, the present application makes the system simpler and more reliable by abandoning the optical fiber, and there will be no problem of illumination light intensity attenuation caused by the breakage of the optical fiber after long-term use; at the same time, there are no optical fiber, light energy coupling device and other light transmission elements, and the manufacturing cost of the endoscope is lower. The light source device in the existing endoscope generally contains multiple LED light sources, each LED can be controlled separately, and the light source device also includes a light mixing optical element and a fiber coupling optical element. Due to its large structure, it can only be set at the handle end of the endoscope to transmit light to the front end of the endoscope through the optical fiber.

[0058] In addition, the front end 40 of the endoscope body of this embodiment is also provided with an RGB image sensor 30. After the LED light source 10 irradiates the target tissue, it will reflect the illumination light. At this time, the reflected illumination light is received by the RGB image sensor 30, and then the RGB image sensor 30 will form an image based on the received illumination light.

[0059] In addition, since the LED lighting device has been described in detail in the above embodiments, this embodiment will not be described in detail here.

[0060] The above specific examples are used to illustrate the present invention, which is only used to help understand the present invention and is not intended to limit the present invention. For those skilled in the art, according to the concept of the present invention, some simple deductions, modifications or substitutions can be made.

Claims

1. An LED lighting device for an endoscope, characterized in that: It includes an LED light source and a light source controller; The LED light source is used to emit narrow-band violet light waves, narrow-band green light waves and / or narrow-band red light waves; the peak wavelength range of the narrow-band violet light waves is 400-440nm, and the half-peak width is less than 40nm; the peak wavelength range of the narrow-band green light waves is 530-550nm, and the half-peak width is less than 80nm; the peak wavelength range of the narrow-band red light waves is 610-680nm, and the half-peak width is less than 120nm; The light source controller is electrically connected to the LED light source, and is used to control the LED light source to emit two or three colors of narrow-band light waves simultaneously.

2. The LED lighting device according to claim 1, characterized in that: One of the LED light sources includes at least one purple semiconductor light emitting chip; A phosphor layer is disposed on the outer surface of the purple semiconductor light-emitting chip, and the phosphor layer contains the narrow-band green phosphor and / or narrow-band red phosphor.

3. The LED lighting device according to claim 2, characterized in that: The emission peak wavelength range of the purple semiconductor light-emitting chip is 400-440nm, and the half-peak width is less than 40nm. The emission peak wavelength range of the narrow-band green phosphor is 530-550nm, and the half-peak width is less than 70nm. The emission peak wavelength range of the narrow-band red phosphor is 610-680nm, and the half-peak width is less than 110nm.

4. The LED lighting device according to claim 1, characterized in that: The peak energy of the narrow-band purple light wave accounts for the highest proportion; And the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band green light wave, and / or the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band red light wave.

5. An LED lighting device for an endoscope, characterized in that: It includes an LED light source and a light source controller; The LED light source is used to emit narrow-band violet light waves, narrow-band green light waves and / or narrow-band red light waves; the peak wavelength range of the narrow-band violet light waves is 400-440nm, and the half-peak width is less than 40nm; the peak wavelength range of the narrow-band green light waves is 530-550nm, and the half-peak width is less than 50nm; the peak wavelength range of the narrow-band red light waves is 610-680nm, and the half-peak width is less than 50nm; The light source controller is electrically connected to the LED light source, and is used to control the LED light source to simultaneously emit narrow-band light waves of one, two or three colors.

6. The LED lighting device according to claim 5, characterized in that: One of the LED light sources includes a purple semiconductor light emitting chip, a green semiconductor light emitting chip and / or a red semiconductor light emitting chip; The purple semiconductor light emitting chip is used to emit the narrow-band purple light wave, the green semiconductor light emitting chip is used to emit the narrow-band green light wave, and the red semiconductor light emitting chip is used to emit the narrow-band red light wave.

7. The LED lighting device according to claim 6, characterized in that: The purple semiconductor light emitting chip, the green semiconductor light emitting chip and / or the red semiconductor light emitting chip are arranged adjacent to each other inside the LED light source, and a gap between two adjacent light emitting chips is less than twice the size of the light emitting chip.

8. The LED light source according to claim 5, characterized in that: The peak energy proportion of the narrow-band purple light wave is the highest, and the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band green light wave, and / or the peak height of the narrow-band purple light wave is greater than 1.2 times the peak height of the narrow-band red light wave.

9. An endoscope, characterized in that: It comprises the lighting device as described in any one of claims 1 to 8, wherein the LED light source is arranged at the front end of the endoscope body.

10. The endoscope according to claim 9, characterized in that The front end of the endoscope is also provided with an RGB image sensor, which is used to receive the illumination light reflected after the LED light source irradiates the target tissue and to perform imaging based on the reflected illumination light.

Images