The Boyd Team Created a Highly Detailed CFD Model for Lytro Camera
Introduction
When Lytro wanted to introduce its next generation of wireless
camera, they turned to BOYD, for assistance. Boyd’s expertise in thermal
management, FEA analysis, package layout and design feasibility studies
allowed Lytro to launch the new camera in a timely and cost-effective
manner.
Challenge
The camera’s feature set – a 4 inch touch screen, image sensor,
variable power (depending on operating mode) PCB, solenoid actuated
mechanical shutter and a high zoom lens with accompanying motor control
board – required a thermal solution that would ensure quality
photographs and long product life.
Thermally, the most critical component was the image sensor, as its operating temperature directly affects the quality of the captured photographs. Keeping temperature deviations inside the camera body at or below the image sensor’s limit was the primary focus of the thermal solution.
Other PCB components, such as the high capacity battery and chip subcomponents also contributed to internal temperature increases. Exterior surface temperature (touch temperature) had to remain under target limits during all operating states of the camera.
Solution
The Boyd Team created a highly detailed CFD model of the
existing camera concept. This model’s parameters were fine-tuned until
they reflected the same results from actual lab tests.
With
a verified CFD model established, Boyd was able to suggest various
internal layouts that could improve thermal performance. Some methods
that were employed were:
– Isolating the high power components from the critical components
– Optimizing the thermal path to transfer heat away from critical components
– Material selection and finish of the camera body to increase radiant heat transfer to the outside environment
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