With the continuous development of ADAS and rearview and surround vision systems, cars will become more intelligent and safer. By 2025, every newly produced car will have a certain degree of mobile interconnection. Among them, the performance of CMOS image sensors will become a key factor in accurately capturing different scenes. In view of this, the electronic enthusiasts' automotive electronics special issue invites Alvin Wong, senior director of market and application of ON Semiconductor's automotive imaging division, to discuss issues related to the field of image sensor.
Alvin Wong, Senior Director, Market and Applications, Automotive Imaging Division, ON Semiconductor
Alvin Wong said that image sensors help to avoid active safety features in car accidents, including not only visual applications such as reversing and panoramic reversing cameras, but also advanced driver assistance systems such as blind spot detection, lane departure warning, collision avoidance and active Cruise control. It also includes applications for pedestrian detection, traffic signal recognition, and new non-ADAS applications such as passenger detection.
There are two types of vehicle panoramic vision sensors, one is a visual sensor for display and the other is a visual sensor for processing . Alvin Wong pointed out that for all visual applications, there are several trends that can be seen:
One is to turn to a higher resolution of up to 2 million pixels for full HD 1080p video;
The second is connectivity, using multiple interface-selected amplifications. To better match a wide range of automotive vision requirements, ON Semiconductor offers system-on-chip VGA sensors for the low to mid-range and image coprocessors to support higher-end sensors of 1 million and 2 million pixels for flexibility in all products.
In all camera applications, low light performance and image quality are important for image sensors in automotive applications. In addition, automotive applications have unique requirements including high dynamic range, wide operating temperature range, high reliability and product quality.
The high dynamic range ensures that the camera can “see†over a wide range of light, dark and high light contrasts, unlike in consumer applications where users have to wait for better lighting conditions to take pictures. Temperature range and reliability are equally important because cars must operate for a long time in a wide range of different environmental conditions relative to consumer equipment. Alvin Wong said that ON Semiconductor has more than 10 years of experience in providing CMOS image sensors for the automotive market. It is the world's No. 1 market supplier of ADAS and the leader of global automotive image sensors, so it understands the strict requirements of automotive applications.
For example, back-illuminated (BSI) sensors typically provide higher sensitivity than front-illuminated (FSI) sensors. Alvin Wong said that the AR0136AT is the first back-illuminated sensor that complies with automotive standards and is 40% more sensitive than the current leading market ARAS flagship product AR0132AT, which is the ability to better capture low-light and infrared images. It can easily replace existing products and is also fully compliant with the AEC-Q100 standard.
Alvin Wong finally stressed that ON Semiconductor is the world leader in automotive imagery and will continue to promote new product development. The products are available in various fields, including vision, ADAS and emerging fields such as cabins. Excited new technologies, products and announced more cooperation programs to meet user needs.
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