Endoscope and LED illumination apparatus therefor
By using narrow-band violet, green, and red LED light sources in the endoscope, the imaging problem of not being able to effectively distinguish specific colors in existing technologies has been solved, achieving a clearer color imaging effect.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MACROLUX MEDICAL TECH CO LTD
- Filing Date
- 2024-12-30
- Publication Date
- 2026-07-09
AI Technical Summary
Existing LED lighting devices cannot effectively distinguish specific colors of imaging illumination when using image sensors with red, green, and blue color response channels, resulting in poor imaging quality.
Using LED light sources with narrowband violet, narrowband green, and narrowband red light waves, the mixing of these light waves is controlled by a light source controller to ensure that there is no significant overlap between the red, green, and blue response channels of the image sensor, forming a special spectrum to enhance the imaging specificity of specific substances.
It improves the salience and contrast of specific substances in the image, making them easier to distinguish from other substances and enhancing the imaging effect.
Smart Images
Figure CN2024143797_09072026_PF_FP_ABST
Abstract
Description
An endoscope and its LED lighting device Technical Field
[0001] This application relates to the field of imaging spectral illumination technology, specifically to an endoscope and its LED illumination device. Background Technology
[0002] Currently, existing LED lighting devices, in pursuit of higher color rendering, mostly use conventional white LEDs, whose emission spectrum is continuous in the 380nm-780nm band. When conventional white LEDs are used for imaging illumination with image sensors that have red, green, and blue three-color response channels, some bands in their emission spectrum will be simultaneously responded to by two color response channels. Therefore, while using conventional continuous-spectrum white LEDs, especially high-color-rendering white LEDs, is advantageous for general color imaging illumination, it is disadvantageous for imaging illumination that requires distinguishing specific colors. Summary of the Invention
[0003] This application provides an endoscope and its LED lighting device, which effectively solves the problem that existing lighting devices cannot clearly distinguish imaging illumination of specific colors under specific requirements.
[0004] According to the first aspect, one embodiment provides an LED lighting device for an endoscope, including an LED light source and a light source controller;
[0005] The LED light source is used to emit narrowband violet light, narrowband green light, and / or narrowband red light; the peak wavelength range of the narrowband violet light is 400⁓440nm, and the half-width at half-maximum (WHM) is less than 40 nm; the peak wavelength range of the narrowband green light is 530⁓550nm, and the WHM is less than 80 nm; the peak wavelength range of the narrowband red light is 610⁓680nm, and the WHM is less than 120 nm.
[0006] The light source controller is electrically connected to the LED light source, and the light source controller is used to control the LED light source to emit narrowband light waves of two or three colors simultaneously.
[0007] In one feasible embodiment, one of the LED light sources includes at least one violet semiconductor light-emitting chip; the outer surface of the violet semiconductor light-emitting chip is provided with a phosphor layer, the phosphor layer comprising narrowband green phosphor and / or narrowband red phosphor.
[0008] In one feasible implementation, the emission peak wavelength of the violet semiconductor light-emitting chip is in the range of 400⁓440nm, with a half-width at half-maximum (WHM) of less than 40 nm; the emission peak wavelength of the narrowband green phosphor is 530⁓550nm, with a WHM of less than 70 nm; and the emission peak wavelength of the narrowband red phosphor is 610⁓680nm, with a WHM of less than 110 nm.
[0009] In one feasible implementation, the peak energy of the narrowband violet light wave accounts for the highest proportion; and 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 / or, the peak height of the narrowband violet light wave is greater than 1.2 times the peak height of the narrowband red light wave.
[0010] According to a second aspect, one embodiment provides an LED lighting device for an endoscope, including an LED light source and a light source controller;
[0011] The LED light source is used to emit narrowband violet light, narrowband green light, and / or narrowband red light; the peak wavelength range of the narrowband violet light is 400⁓440nm, and the half-width at half-maximum (WHM) is less than 40 nm; the peak wavelength range of the narrowband green light is 530⁓550nm, and the WHM is less than 50 nm; the peak wavelength range of the narrowband red light is 610⁓680nm, and the WHM is less than 50 nm.
[0012] The light source controller is electrically connected to the LED light source, and the light source controller is used to control the LED light source to emit narrowband light waves of one, two or three colors simultaneously.
[0013] In one feasible implementation, the LED light source includes a violet semiconductor light-emitting chip, a green semiconductor light-emitting chip, and / or a red semiconductor light-emitting chip; the violet semiconductor light-emitting chip is used to emit the narrowband violet light wave, the green semiconductor light-emitting chip is used to emit the narrowband green light wave, and the red semiconductor light-emitting chip is used to emit the narrowband red light wave.
[0014] In one feasible implementation, the violet 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 the gap between two adjacent light-emitting chips is less than twice the size of the light-emitting chip.
[0015] In one feasible implementation, the narrowband violet light wave has the highest peak energy ratio, and 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 / or, the peak height of the narrowband violet light wave is greater than 1.2 times the peak height of the narrowband red light wave.
[0016] According to a third aspect, one embodiment provides an endoscope that employs an LED lighting device as described above, wherein the LED light source is disposed at the tip of the endoscope body.
[0017] In one feasible implementation, the LED light source is disposed at the tip of the endoscope body.
[0018] In one feasible implementation, the tip of the endoscope is further provided with an RGB image sensor, which is used to receive the illumination light reflected after the LED light source illuminates the target tissue, and to perform imaging based on the reflected illumination light.
[0019] According to the LED illumination device for endoscopes in the above embodiments, the LED light source can emit narrowband violet light waves with a peak wavelength range of 400⁓440nm and a half-width at half-maximum (WHM) of less than 40 nm; it can also emit narrowband green light waves with a peak wavelength range of 530⁓550nm and a WHM of less than 80 nm; and it can also emit narrowband red light waves with a peak wavelength range of 610⁓680nm and a WHM of less than 120 nm. When using the illumination device of this application, by controlling the LED light source to emit narrowband light waves of two or more colors simultaneously through the light source controller, the LED light source forming a special spectrum illuminates the imaging object containing a specific substance for color imaging, making the specificity of the specific substance in the image more obvious and easier to distinguish from other substances. This can enhance the specificity or contrast of the target imaging substance in the image, thereby achieving the effect of enhancing the imaging of the target substance. Attached Figure Description
[0020] Figure 1 is a structural schematic diagram of the LED lighting device provided in this embodiment;
[0021] Figure 2 is a graph showing the peak wavelength versus energy of the special spectral light wave provided in this embodiment;
[0022] Figure 3 is a graph showing the relationship between the special spectrum emitted by the LED light source and the RGB response spectrum of the image sensor in this embodiment.
[0023] Figure 4 is a schematic diagram of a structure when the LED light source provided in this embodiment is a violet semiconductor light-emitting chip;
[0024] Figure 5 is a schematic diagram of another structure when the LED light source provided in this embodiment is a violet semiconductor light-emitting chip;
[0025] Figure 6 is a schematic diagram of the structure of the LED light source provided in this embodiment when it is a purple semiconductor light-emitting chip, a red semiconductor light-emitting chip, and a green semiconductor light-emitting chip.
[0026] Reference numerals: 10, LED light source; 11, violet semiconductor light-emitting chip; 12, phosphor layer; 13, narrowband red phosphor layer; 14, narrowband green phosphor layer; 15, green semiconductor light-emitting chip; 16, red semiconductor light-emitting chip; 20, light source controller; 30, RGB image sensor; 40, tip. Detailed Implementation
[0027] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings. Similar elements in different embodiments are referred to by associated similar element reference numerals. In the following embodiments, many details are described to facilitate a better understanding of this application. However, those skilled in the art will readily recognize that some features may be omitted in different situations, or may be replaced by other elements, materials, or methods. In some cases, certain operations related to this application are not shown or described in the specification. This is to avoid obscuring the core parts of this application with excessive description. For those skilled in the art, detailed description of these related operations is not necessary; they can fully understand the related operations based on the description in the specification and general technical knowledge in the art.
[0028] Furthermore, the features, operations, or characteristics described in the specification can be combined in any suitable manner to form various embodiments. At the same time, the steps or actions in the method description can be rearranged or adjusted in a manner obvious to those skilled in the art. Therefore, the various orders in the specification and drawings are only for the clear description of a particular embodiment and do not imply a necessary order, unless otherwise stated that a particular order must be followed.
[0029] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the described objects and have no sequential or technical meaning. The terms "connection" and "linkage" used in this application, unless otherwise specified, include both direct and indirect connections (linkages).
[0030] Conventional color imaging sensors employ a tristimulus-based filter system in front of the sensor's photosensitive area to separate different colors and achieve color imaging. Therefore, in a conventional color imaging sensor using an RGB filter system, the B color region represents the blue response channel, exhibiting high response in the 380nm-520nm wavelength range; the G color region represents the green response channel, exhibiting high response in the 460nm-610nm wavelength range; and the R color region represents the red response channel, exhibiting high response in the 580nm-800nm wavelength range. Consequently, the blue and green response channels show significant overlap in the 470nm-520nm wavelength range, and the green and red response channels show significant overlap in the 580nm-610nm wavelength range. When existing white LEDs are used for imaging illumination with image sensors that have red, green, and blue color response channels, some bands in their emission spectrum are simultaneously responded to by two color response channels. Therefore, when using image sensors with red, green, and blue color response channels, conventional continuous spectrum white LEDs, especially high color rendering white LED light sources, are not suitable for imaging illumination that requires distinguishing specific colors.
[0031] In view of this, this application proposes an LED illumination device for an endoscope, which can be used for color imaging illumination, particularly for color imaging illumination using an image sensor with red, green, and blue three-color response channels. Specifically, the endoscope and its LED illumination device are described in detail in the following embodiments.
[0032] Example 1
[0033] As shown in Figure 1, this embodiment provides an LED lighting device for an endoscope, including an LED light source 10 and a light source controller 20. The LED light source 10 emits narrowband violet light, narrowband green light, and / or narrowband red light. The peak wavelength range of the narrowband violet light is 400⁓440nm, and the half-width at half-maximum (WHM) is less than 40 nm. The peak wavelength range of the narrowband green light is 530⁓550nm, and the WHM is less than 80 nm. The peak wavelength range of the narrowband red light is 610⁓680nm, and the WHM is less than 120 nm. The light source controller 20 is electrically connected to the LED light source 10 and controls the LED light source 10 to simultaneously emit narrowband light of two or more colors, specifically two or three colors.
[0034] In this embodiment, the wavelength range of the narrowband violet light emitted by the LED light source 10 is mainly within the response band of the blue response channel of the color image sensor; the wavelength range of the emitted narrowband green light is mainly within the response band of the green response channel of the color image sensor; and the wavelength range of the emitted narrowband red light 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 violet light in this embodiment is 400⁓440nm with a half-width at half-maximum (WHM) of less than 40 nm; the peak wavelength range of the narrowband green light is 530⁓550nm with a WHM of less than 80 nm; and the peak wavelength range of the narrowband red light is 610⁓680nm with a WHM of less than 120 nm, it can be seen that the narrowband violet, narrowband green, and narrowband red light emitted by the LED light source 10 in this embodiment have minimal overlap between the blue, green, and red response channels of the image sensor.
[0035] In use, the LED light source 10 is controlled by the light source controller 20 to simultaneously emit narrowband light waves of narrowband violet and narrowband green; or, the LED light source 10 is controlled to simultaneously emit narrowband light waves of narrowband violet, narrowband green, and narrowband red; or the LED light source 10 is controlled to simultaneously emit narrowband light waves of narrowband violet, narrowband green, and narrowband red, etc., to form an LED light source 10 with this special spectrum. When using this special spectrum LED light source 10 for color imaging, if the characteristic peaks of the reflection or absorption spectra of a specific substance contained in the imaged object overlap or partially overlap with the emission spectrum of the LED light source 10 with this special spectrum, since the emission spectrum of the LED light source 10 does not have significant overlap between the red, green, and blue response channels of the image sensor, the specificity of these specific substances in the image is more obvious during imaging, and they are easier to distinguish from other substances. Therefore, when using the LED light source 10 with a special spectrum emitted by the LED lighting device of this application for illumination imaging, the characteristic peak value and half-peak width of the LED light source 10 spectrum can be adjusted within the corresponding band according to the absorption or reflection spectral characteristics of the target imaging material to enhance the specificity or contrast of the target imaging material in the image, thereby achieving the effect of enhancing the imaging of the target material.
[0036] Furthermore, the aforementioned LED light source 10 includes at least one violet semiconductor light-emitting chip 11; a phosphor layer 12 is disposed on the outer surface of the violet semiconductor light-emitting chip 11, the phosphor layer 12 comprising narrowband green phosphor and / or narrowband red phosphor. Moreover, the emission peak wavelength of the violet semiconductor light-emitting chip is in the range of 400⁓440nm, with a half-width at half-maximum (HWHM) of less than 40 nm; the emission peak wavelength of the narrowband green phosphor is 530⁓550nm, with a HWHM of less than 70 nm; and the emission peak wavelength of the narrowband red phosphor is 610⁓680nm, with a HWHM of less than 110 nm.
[0037] As shown in Figure 4, in practical applications, the LED light source 10 may include a violet semiconductor light-emitting chip 11, wherein the violet semiconductor light-emitting chip 11 may be a violet LED chip, and a phosphor layer 12 is covered on the upper surface of the chip. The phosphor layer 12 includes a narrowband green phosphor and / or a narrowband red phosphor layer 1.
[0038] Specifically, the phosphor layer 12 can be configured by mixing narrowband green phosphor and narrowband red phosphor to form the phosphor layer 12 shown in Figure 4. Alternatively, as shown in Figure 5, a narrowband green phosphor layer 14 and a narrowband red phosphor layer 13 can be stacked from bottom to top on the violet semiconductor light-emitting chip 11. When the light source controller 20 controls the violet semiconductor light-emitting chip 11 to emit light, the narrowband violet light wave sequentially excites the narrowband green phosphor layer 14 and the narrowband red-green phosphor layer 13, emitting a special spectral light wave. The positions of the narrowband green phosphor layer 14 and the narrowband red phosphor layer 13 can be interchanged, depending on actual needs.
[0039] Alternatively, one half of the outer surface of the violet semiconductor light-emitting chip 11 can be covered with a narrowband green phosphor layer 14, and the other half can be covered with a narrowband red phosphor layer 13. Narrowband violet light waves can excite the narrowband red phosphor layer 13 and the narrowband green phosphor layer 14 respectively to emit special spectral light waves.
[0040] As one embodiment of this invention, the LED light source 10 may further include two violet semiconductor light-emitting chips 11; one of the violet semiconductor light-emitting chips 11 has a phosphor layer 12 disposed on its outer surface; and the other violet semiconductor light-emitting chip 11 has a narrow-band green phosphor layer 14 or a narrow-band red phosphor layer 13 disposed on its outer surface.
[0041] Specifically, in this embodiment, when the LED light source 10 includes two violet semiconductor light-emitting chips 11, a phosphor layer 12 is disposed on the upper surface of one of the violet semiconductor light-emitting chips 11. The disposal method can refer to the above embodiment of the LED light source 10 including one violet semiconductor light-emitting chip 11, which will not be described in detail here. A narrow-band green phosphor layer 14 or a narrow-band red phosphor layer 13 is disposed on the upper surface of the other violet semiconductor light-emitting chip 11. When the light source controller 20 controls the violet semiconductor light-emitting chip 11 to emit light, the narrow-band violet light wave can excite the green phosphor layer alone, or the narrow-band violet light wave can excite the red phosphor layer alone, so as to generate a special spectral light wave composed of a mixture of light waves of various different colors.
[0042] In addition, the narrowband green phosphor in this scheme can be one or more of aluminate green phosphor, phosphate green phosphor, halide green phosphor, nitride green phosphor, silicate green phosphor, and nitride green phosphor; the narrowband 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 violet semiconductor light-emitting chip 11 to emit light, the narrow-band violet light wave irradiates the phosphor layer 12, and the narrow-band green phosphor in the phosphor layer 12 is excited to emit narrow-band green light wave. The narrow-band red phosphor in the phosphor layer 12 is excited to emit narrow-band red light wave, and the special spectral light wave is formed by the mixture of narrow-band violet 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, blue, green, and red light, the spectrum of the special spectral LED light source 10 in this embodiment is discontinuous or has typical peaks and troughs in the visible light range of 380nm-780nm.
[0045] In one specific implementation, the emission peak wavelength of the violet semiconductor light-emitting chip 11 is 420 nm, the emission peak wavelength of the narrowband green phosphor is 545 nm, and the emission peak wavelength of the narrowband red phosphor is 660 nm; wherein, the half-width at half-maximum (WHM) of the narrowband green phosphor is 50 nm, and the WHM of the narrowband red phosphor is 100 nm. Specifically, the special spectrum LED light source 10 can use a 420 nm violet semiconductor light-emitting chip 11, and cover it with a phosphor layer 12 composed of a narrowband green phosphor with a peak wavelength of 545 nm and a WHM of approximately 50 nm and a narrowband red phosphor with a peak wavelength of 660 nm and a WHM of approximately 100 nm. The light source spectrum is shown in 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 shown in Figure 3.
[0046] Furthermore, considering that the blue, green, and red response channels of the image sensor have different responsiveness to light intensity, the peak energy ratios of the narrowband violet, green, and red light waves emitted by the LED light source 10 can be equal or unequal, as shown in Figure 2. In some implementations, the peak energy ratios of the three light waves can be adjusted by the concentration of phosphor in the phosphor layer. To reduce the energy ratio of the narrowband green or red light waves, the concentration of the corresponding phosphor is reduced; to increase the energy ratio of the green or red light waves, the concentration of the corresponding phosphor is increased.
[0047] In specific implementation, considering that the half-width at half maximum (WHM) of narrowband violet light is narrower than that of narrowband green light, and that the responsivity of the blue response channel of image sensors is usually lower, preferably, the peak energy of narrowband violet light has the highest proportion in the spectrum, that is, the highest peak wavelength of the entire spectrum is located in the narrowband violet band.
[0048] In endoscopic 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 green light wave is 0.8, the peak height of the narrowband violet light wave can 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] Referring to Figures 1 and 6, this embodiment provides an LED lighting device for an endoscope, including an LED light source 10 and a light source controller 20. The LED light source 10 emits narrowband violet light, narrowband green light, and / or narrowband red light; the peak wavelength range of the narrowband violet light is 400⁓440nm, and the half-width at half-maximum (WHM) is less than 40 nm; the peak wavelength range of the narrowband green light is 530⁓550nm, and the WHM is less than 50 nm; the peak wavelength range of the narrowband red light is 610⁓680nm, and the WHM is less than 50 nm. The light source controller 20 is electrically connected to the LED light source 10 and controls the LED light source 10 to simultaneously emit one, two, or three colors of narrowband light.
[0052] The LED light source 10 in this embodiment, under the control of the light source controller 20, can emit narrowband violet light with a peak wavelength range of 400⁓440nm and a half-width at half-maximum (HWHM) of less than 40 nm; it can also emit narrowband green light with a peak wavelength range of 530⁓550nm and a HWHM of less than 50 nm; and it can also emit narrowband red light with a peak wavelength range of 610⁓680nm and a HWHM of less than 50 nm. Compared to Embodiment 1, the HWHMs of the narrowband violet, green, and red light waves in this embodiment are narrower. Since the narrowband violet light wave in this embodiment is emitted by the violet semiconductor light-emitting chip 11, the narrowband green light wave by the green semiconductor light-emitting chip 15, and the narrowband red light wave by the red semiconductor light-emitting chip 16, the LED chip can emit narrowband light with an even smaller HWHM.
[0053] Since narrowband violet light waves, narrowband green light waves, and narrowband red light waves are emitted by different semiconductor light-emitting chips, the configuration of the semiconductor light-emitting chips needs to be optimized to mix these different narrowband color light waves.
[0054] Furthermore, in this embodiment, the violet 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 twice the size of the light-emitting chip. The smaller the gap between the light-emitting chips, the more densely the light-emitting chips are arranged, the smaller the light-emitting area of the LED light source 10, and the more uniformly the emitted light waves of different colors are mixed over a short distance. This is beneficial to the spatial color uniformity of illumination over short distances.
[0055] Furthermore, considering that the blue, green, and red response channels of the image sensor have different responsiveness to light intensity, the peak energy proportions of the narrowband violet, green, and red light waves emitted by the LED light source 10 can be equal or unequal, as shown in Figure 2. In some implementations, the peak energy proportions of the three light waves can be adjusted by regulating the luminous power of the three semiconductor light-emitting chips. To reduce the energy proportion of a certain narrowband light wave, the luminous power of the corresponding light-emitting semiconductor chip is reduced; to increase the energy proportion of a certain narrowband light wave, the luminous power of the corresponding light-emitting semiconductor chip is increased. The luminous power can be changed by altering the size of the light-emitting chip, the driving current, or the driving voltage. In specific implementations, considering that the half-width at half-maximum (WHM) of the narrowband violet light wave is narrower than that of the narrowband green light wave, and that the blue response channel of the image sensor typically has a lower responsiveness, preferably, the peak energy proportion of the narrowband violet light wave is the highest in the spectrum, meaning that the highest peak wavelength of the entire spectrum is located in the narrowband violet band. In endoscopic applications, the peak height of the preferred narrowband violet light wave is greater than 1.2 times that of the peak height of the narrowband green light wave and / or the narrowband red light wave.
[0056] Example 3
[0057] This embodiment provides an endoscope that uses the LED lighting device described in Embodiment 1 or Embodiment 2. Referring to Figure 1, in practical applications, the LED light source 10 in the LED lighting device is placed at the tip 40 of the endoscope body. This is because the illumination light emitted by the LED light source 10 does not need to be transmitted through optical fibers and can directly illuminate the target tissue, minimizing light energy loss. Considering that the endoscope body is frequently bent inside the body during use, this application omits optical fibers to make the system simpler and more reliable, avoiding the problem of light intensity attenuation caused by optical fiber breakage after prolonged use. Furthermore, without optical fibers, optical coupling devices, and other light transmission elements, the manufacturing cost of the endoscope is lower. In contrast, the light source devices in existing endoscopes generally contain multiple LED light sources, each of which can be controlled individually. These devices also include light mixing optical elements and fiber optic coupling optical elements. Due to their large size, they can only be placed at the handle end of the endoscope, transmitting light to the tip of the endoscope via optical fibers.
[0058] Furthermore, the endpiece 40 of this embodiment is also provided with an RGB image sensor 30. After the LED light source 10 illuminates 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] Furthermore, since the LED lighting device has been described in detail in the above embodiments, it will not be described in detail here.
[0060] While the principles herein have been illustrated in various embodiments, numerous modifications to the structure, arrangement, proportions, elements, materials, and components, particularly suited to specific environmental and operational requirements, may be used without departing from the principles and scope of this disclosure. These modifications and other alterations or alterations will be included within the scope of this document.
[0061] The foregoing specific descriptions have been described with reference to various embodiments. However, those skilled in the art will recognize that various modifications and changes can be made without departing from the scope of this disclosure. Therefore, considerations for this disclosure are to be illustrative rather than restrictive, and all such modifications are to be included within its scope. Similarly, advantages, other advantages, and solutions to problems with respect to various embodiments have been described above. However, benefits, advantages, solutions to problems, and any elements that produce these, or make them more explicit, should not be construed as critical, essential, or necessary. The term “comprising” and any other variations thereof as used herein are non-exclusive inclusion, meaning that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed or not part of the process, method, system, article, or apparatus. Furthermore, the term “coupled” and any other variations thereof as used herein refer to physical connections, electrical connections, magnetic connections, optical connections, communication connections, functional connections, and / or any other connections.
[0062] Those skilled in the art will recognize that many changes can be made to the details of the above embodiments without departing from the basic principles of the invention. Therefore, the scope of the invention should be determined according to the following claims.
Claims
1. An LED lighting device for an endoscope, characterized in that, Includes an LED light source and a light source controller; The LED light source is used to emit narrowband violet light, narrowband green light, and / or narrowband red light; the peak wavelength range of the narrowband violet light is 400⁓440nm, and the half-width at half-maximum (WHM) is less than 40 nm; the peak wavelength range of the narrowband green light is 530⁓550nm, and the WHM is less than 80 nm; the peak wavelength range of the narrowband red light is 610⁓680nm, and the WHM is less than 120 nm. The light source controller is electrically connected to the LED light source, and the light source controller is used to control the LED light source to emit narrowband light waves of two or three colors simultaneously.
2. The LED lighting device as described in claim 1, characterized in that, One of the LED light sources includes at least one violet semiconductor light-emitting chip; The outer surface of the violet semiconductor light-emitting chip is provided with a phosphor layer, which includes the narrowband green phosphor and / or narrowband red phosphor.
3. The LED lighting device as described in claim 2, characterized in that, The emission peak wavelength range of the violet semiconductor light-emitting chip is 400⁓440nm, and the half-width at half-maximum (WHM) is less than 40 nm. The emission peak wavelength range of the narrowband green phosphor is 530⁓550nm, and the WHM is less than 70 nm. The emission peak wavelength range of the narrowband red phosphor is 610⁓680nm, and the WHM is less than 110 nm.
4. The LED lighting device as described in claim 1, characterized in that, The narrowband violet light wave has the highest peak energy percentage; Furthermore, the peak height of the narrowband purple light wave is greater than 1.2 times the peak height of the narrowband green light wave, and / or, the peak height of the narrowband purple light wave is greater than 1.2 times the peak height of the narrowband red light wave.
5. An LED lighting device for an endoscope, characterized in that, Includes an LED light source and a light source controller; The LED light source is used to emit narrowband violet light, narrowband green light, and / or narrowband red light; the peak wavelength range of the narrowband violet light is 400⁓440nm, and the half-width at half-maximum (WHM) is less than 40 nm; the peak wavelength range of the narrowband green light is 530⁓550nm, and the WHM is less than 50 nm; the peak wavelength range of the narrowband red light is 610⁓680nm, and the WHM is less than 50 nm. The light source controller is electrically connected to the LED light source, and the light source controller is used to control the LED light source to emit narrowband light waves of one, two or three colors simultaneously.
6. The LED lighting device as described in claim 5, characterized in that, One of the LED light sources includes a violet semiconductor light-emitting chip, a green semiconductor light-emitting chip, and / or a red semiconductor light-emitting chip; The violet semiconductor light-emitting chip is used to emit the narrowband violet light wave, the green semiconductor light-emitting chip is used to emit the narrowband green light wave, and the red semiconductor light-emitting chip is used to emit the narrowband red light wave.
7. The LED lighting device as described in 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 the gap between two adjacent light-emitting chips is less than twice the size of the light-emitting chip.
8. The LED light source as described in claim 5, characterized in that, The narrowband violet light wave has the highest peak energy ratio, and 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 / or, the peak height of the narrowband violet light wave is greater than 1.2 times the peak height of the narrowband red light wave.
9. An endoscope, characterized in that, The illumination device includes any one of claims 1-8, wherein the LED light source is disposed at the tip of the endoscope body.
10. The endoscope as claimed in claim 9, characterized in that, The endoscope is further provided with an RGB image sensor at the tip of the endoscope body. The RGB image sensor is used to receive the illumination light reflected from the target tissue after the LED light source illuminates it, and to form an image based on the reflected illumination light.