1, switch button.
2. Source search: The projector has two signal inputs: VGA and AV, and others may include HDMI. This function selects the signal source to be projected.
3. Trapezoidal correction: the image correction function realized when the projector is installed or the projection curtain is incorrect.
4. brightness level: Generally, enter the menu with detailed instructions. As long as you follow the instructions, the possible contents of different manufacturers will not be the same, but they are generally similar.
But now many multimedia classrooms can be equipped with a multimedia central controller, so that the infrared code of the projector switch can be learned into the central control, and the central control can be directly used to switch the projector and control the rise and fall of the projection curtain. This saves the remote control of the projector.
Extended data
1, teaching: training meeting, classroom teaching; Traditional projectors are inconvenient to carry. Because there are naughty students in the school classroom, the projector is not safe in the classroom and is easily damaged by students. The portability of mini projector makes up for the vacancy in teaching. In the future, teachers only need to store the materials in the projector for students to see, which saves the trouble of textbooks and handwriting with pen and chalk.
2. Handheld projectors can be classified from two aspects:
(1) From the light source, micro-projection can be divided into LED and laser light source.
(2) From the perspective of display chips, it can be divided into LCoS technology and DLP technology, in which LCoS can realize color through color sequence and color filter.
(3) Handheld projectors can be divided into two types according to the functional quotient of multimedia audio-visual decoding and storage equipment: multimedia type: multimedia type means that the memory storage space of this machine can even be expanded, and it can automatically decode and play audio-visual files. Non-multimedia mode: Non-multimedia mode is similar to a traditional computer, and can only be put into use if it is connected to a computer.
Baidu Encyclopedia: Teaching Projector