Now a lot of projectors are equipped with auto focus function, which can automatically bring users clear images in one second after power on. It is not only easy to use, but also looks full of technology. Today, the author comes to chat with you about the projector. Auto focus function. 
In the past, many projectors did not have auto-focus function. This is not because of how advanced this function is. Instead, most of the projectors used in the past were mounted in the ceiling. After adjusting the focal length during installation, they would not move anymore. Therefore, this function was used to project home projectors in the past. It does not make any sense at all.
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1 second shows a clear picture on the projector auto focus function
The principle of auto focus is not so complicated. First, the projector will have a built-in database of distance and resolution. When the projection is turned on, the system will detect the distance between the lens and the wall by infrared or optical distance measurement. , And then use the look-up table method to find the most suitable location in the database, this time the stepper motor will drive the zoom projection lens to this position, so that autofocus is completed. Full autofocus takes only 1 to 2 seconds
It's quite lively, but the whole process takes only one to two seconds to complete. Basically, in actual application, the user can complete autofocus as soon as the power is turned on. Therefore, most users do not have much knowledge of this process. In the past, many projectors did not have auto-focus function. This is not because of how advanced this function is. Instead, most of the projectors used in the past were mounted in the ceiling. After adjusting the focal length during installation, they would not move anymore. Therefore, this function was used to project home projectors in the past. It does not make any sense at all.
Most of the projections used in the past have been hoisted and do not require auto focus function.
The development of LED projection makes the auto focus function useful. No matter whether it is a portable home projector or a micro projector, it does not need to be lifted. Therefore, it is often necessary to move the projection position during daily use. Every time you change to a place, you need to readjust the focus. Too much trouble, so the autofocus function is very practical for the user. Auto focus function brings great convenience to users
Especially for pico projectors, the daily use scene is very complicated, and it is always troublesome to adjust the focal length. The emergence of autofocus technology has truly solved the needs of users. We can take a look at some of the high-end micro-projection products are now equipped with auto-focus function, the author thinks that it will not take much time to autofocus will be the standard function of micro-projection. Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, TV boxes, smart TVs, smart TV software, etc. Answering questions.
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