Optoelectronics
Figure 3: The prism actuator OIS is combined with a lens actuator OIS to correct the deviation of the light path.
with the company’s latest 6-axis CORONA premium motion sensors to provide a software controller, avoiding the need for a dedicated OIS controller chip required for other OIS solutions. This reduces the cost and complexity of SMA OIS solutions, enabling OEMs to accelerate their next- generation smartphones.
requiring more precise control of the OIS
actuators. To address this issue, TDK introduced shape-memory alloys (SMA), which are alloys that can be deformed but return to their pre-deformed shape when heated to a given temperature.
With a thickness of just 25 microns, SMA- based OIS actuators offer
mobile phones. Today, it is common practice to use a wire suspension as the supporting mechanism for OIS, enabling smoother operation and greater control and, therefore, improving image stabilization. The OIS from TDK, for
example, stabilizes the image via a system driven along the triple axes (x, y and z) axes, see Figure 2.
However, as newer smartphone cameras feature higher image resolutions, the lens apertures have become much larger,
some of the industry’s highest drive power. They achieve this high level of stabilization by moving the lens with a dedicated OIS and another one for the prism, which bends the light rays, see Figure 3.
The SMA actuators work in combination
Future prospects for smartphone cameras
With TDK’s design technologies that leverage proprietary simulation and manufacturing capabilities for OIS actuators, the company has brought products like prism actuators and combination products to life. There is a sustained rise in demand for continuous zoom, which allows you to transition from wide-angle to telephoto as you can with a digital camera. TDK is now looking to apply its autofocus CMA to augmented reality (AR) functionalities, for future smartphone cameras and smart glasses, thereby creating a new, more convenient world.
https://www.tdk.com/en
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info@aptechnologies.co.uk | +44(0)1225 780400 Components in Electronics June 2022 33
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