Automotive laminate camera heating system with low distortion
A sandwich panel, resistance heating technology, applied in the direction of coating, layered products, vehicle parts, etc., can solve the problems of refractive index change, distortion, etc., and achieve the effect of short driving time
Active Publication Date: 2020-12-25
AGP AMERICA
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Problems solved by technology
However, as the temperature of the polymer interlayer increases, the refractive index changes and the property no longer matches that of glass
This change in the index of refraction causes distortion
Method used
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[0059] The following terms are used to describe the laminated glass of the present invention. A typical automotive sandwich panel cross-section is Figure 2A with 2B shown. The sandwich panel consists of two layers of glass, an outer or outer layer 201 and an inner or inner layer 202, which are permanently bonded together by a plastic adhesive layer 4 (middle layer). The glass surface on the exterior of the vehicle is referred to as the first surface 101 or surface number one. The opposite side of the outer glass layer 201 is the second surface 102 or the second surface. The glass surface of the vehicle interior is referred to as the fourth surface 104 or surface number four. The opposite side of the inner glass layer 202 is the third surface 103 or surface number three. The second surface 102 and the third surface 103 are glued together by the plastic adhesive layer 4 . Masking 6 can also be applied to the glass. The masking portion 6 typically consists of a black enam...
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Abstract
The use of camera-based safety systems is growing at a rapid rate in automobiles where they are used to provide lane departure warning, collision avoidance, adaptive cruise control and other functions. As the industry moves towards full autonomous capability, the number of cameras and the resolution are increasing. For proper operation, the cameras require a clear undistorted field of view. Keeping the camera area free of snow and ice has been a problem. A resistive heating circuit is typically used to keep the area clear. For rapid clearing the circuit needs to operate at a high-power level.Due to the temperature dependent index of refraction of the plastic interlayer, severe distortion can result from the non-isothermal heating resulting from the spacing of the circuit elements. The laminate of the invention reduces distortion by removing the interlayer in the camera field of view and replacing with a plastic having a more temperature stable index of refraction.
Description
technical field [0001] The invention relates to the field of laminated automotive glass. Background technique [0002] The use of camera-based security systems is growing rapidly, requiring a wide field of view and high levels of optical clarity. Camera-based systems are used to provide a variety of safety functions, including adaptive cruise control, emergency braking, obstacle detection, lane departure warning, and support for autonomous operation. A bright, clear, distortion-free field of view and unaltered natural color is critical for camera-based systems to function as expected. This is essential for these systems to be able to quickly classify and differentiate objects, capture documents, recognize signs and signals, and operate with minimal lighting. [0003] As the industry moves toward full autonomous capabilities, the number and resolution of cameras is increasing. Cameras require a high forward field of view and must therefore typically be mounted on the winds...
Claims
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IPC IPC(8): B32B17/10
CPCB32B17/10036B32B17/1011B32B17/10174B32B17/10293B32B17/10348B32B17/1066B32B17/10761B32B17/10889B32B17/10385B32B1/00B32B17/10119B32B17/10541B32B17/1077B32B17/10788B32B2315/08B32B2605/006
Inventor 马里奥·阿图罗·曼海姆·阿斯塔特劳拉·格拉纳多斯·卡罗
Owner AGP AMERICA