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Automatic air conditioner
Automatic air conditioner is a function that automatically controls the air conditioner, based on the temperature inside the car and the amount of sunlight. It uses a sunlight sensor with a built-in photodiode to detect the amount of sunlight.
In recent years, automatic air conditioning has become a standard feature installed in automobiles, and it is rapidly achieving greater sophistication, with features such as left and right independent controls. Because of this, it has become necessary to make the installed sunlight sensors capable of, not only detecting the amount of sunlight, but also the position of the sun.
It is also necessary to make sunlight sensors more compact and integrated with other sensors that monitor the external environment, such as raindrop detectors and light and dark detectors, with consideration for the interior design of vehicles when increasing the number of sensors installed in them. Hamamatsu can also provide optical semiconductor devices with custom specifications that meet such requirements.
Mechanism of the automatic air conditioner (application of sunlight sensors)
Si photodiodes are used in sunlight sensors installed in automobiles. A sunlight sensor controls the air conditioner by outputting a current according to the amount of sunlight.
Recommended products
Sunlight sensor (photodiode assembly)
■ Features
- Wide photosensitive area
- Wide temperature range, high reliability
- Low price
This is a sunlight sensor with an integrated connector. It comes equipped with a wide directivity cover suitable for on-board automatic air conditioner sunlight sensors.
Directivity
Photosensors for sunlight sensors
This Si photodiode comes in a glass epoxy package applicable to lead-free solder reflow. It features a wide operating and storage temperature range. Photosensitive area: 2 × 2 mm.
This Si photodiode comes in a glass epoxy package applicable to lead-free solder reflow. It features a wide operating and storage temperature range (-40 to +125 ℃). Photosensitive area: 1.3 × 1.3 mm.
This 4-segment photodiode comes in a ceramic package. Photosensitive area: 10 × 10 mm.
This surface mount type Si PIN photodiode comes in a plastic package. Photosensitive area: 1.8 × 2.1 mm.
IC technology
We incorporate a photodiode and peripheral circuit into a single IC package, so it can contribute to reducing the number of parts and mounting space. We also offer custom support for this type of specification.
Related documents
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