The Impact of Dimmable LEDs and Color Temperature on the Imaging of Endoscope Camera Modules

As the core component of precision observation equipment, the imaging quality of endoscope camera modules directly determines the accuracy of detection, diagnosis, or analysis. In the imaging process, the performance of the supplementary lighting system is particularly crucial. Among them, the stability of dimmable LEDs and the rationality of LED color temperature are the core factors affecting image clarity, color reproduction, and detail expression. This article combines the specific parameters of a 12MP high-resolution endoscope camera module to conduct an in-depth analysis of the actual impact of dimmable LEDs and LEDs with different color temperatures on its imaging.

The core value of dimmable light lies in dynamic adaptability. The LED supplementary lighting intensity of this module can be flexibly adjusted according to changes in ambient light. Combined with the light-sensing performance of the 1/3.06-inch CMOS sensor and 1.12μmx1.12μm pixel size, it can provide sufficient supplementary lighting in dim scenes (such as inside industrial equipment, deep cavities), avoiding detail loss caused by insufficient exposure; in complex light scenes, it can reduce the supplementary lighting intensity to prevent high-light overexposure from damaging the image hierarchy. At the same time, the maximum frame rate of 30FPS places strict requirements on the stability of supplementary lighting. The firmness of LED solder joints brought by SMT technology and the precise assembly of optical components through AA process ensure that LEDs emit light stably in high-frequency dynamic imaging, avoiding image trailing caused by flickering, and providing a basis for smooth dynamic observation.

LED color temperature is a key parameter affecting color reproduction. Light with different color temperatures will change the color presentation effect of objects, thereby affecting the judgment of the observed target. LED light with too low color temperature (such as below 3000k) is yellowish, which easily leads to excessive warm colors in the image and covers the true color of the object; light with too high color temperature (such as above 6500k) is bluish, which will make the cold colors in the image prominent and cause color distortion. This endoscope camera module stabilizes the LED color temperature at 4500-5000k, which is close to the "neutral white" of natural light, laying a foundation for accurate color reproduction.

In terms of actual imaging, the 4500-5000k color temperature and 12MP high pixels form a synergistic advantage. The 12MP pixels with 3840x3104 resolution can capture fine structures such as capillaries and solder joint textures, while the neutral white color temperature can truly restore the original color of objects: in medical observation, it can accurately present the redness of mucous membranes or the abnormal color of diseased tissues; in industrial testing, it can clearly distinguish the color difference of metal oxide layers or material differences of plastic parts. In addition, the light under this color temperature has a higher color rendering index. Combined with the color analysis ability of the CMOS color image sensor, it can reduce the interference of color deviation on auto-focus. The module's depth of field range of 3.5cm~Infinity and auto-focus function can lock the target more accurately in a neutral light environment, avoiding focusing deviation caused by color distortion.

The parameter design of this endoscope camera module reflects the synergistic optimization idea of dimmable LEDs and color temperature on imaging. The dimmable supplementary lighting capability of 8 SMD LEDs solves the problem of brightness adaptation in different scenes, while the 4500-5000k color temperature ensures the accuracy of the color benchmark. Both act on the 12MP high-resolution sensor to achieve the imaging goal of "clear details + true colors". At the same time, the integrated design of the lens with a steel sleeve reduces external light interference, making the LED supplementary lighting effect more stable; the compatibility of the USB2.0 interface and UVC protocol ensures the real-time transmission of high-resolution images during supplementary lighting adjustment, avoiding dynamic observation experience being affected by data delay.