In multimedia classroom, often can see video exhibits a stage " form " , use it and cooperate projector or computer, improve education result effectively. To ensure video exhibits a stage can efficient, show the object such as model, manuscript, slide realistically come out, article spy summary operates skill as follows, the person that use for everybody is referenced.

1, protection is photographed like the head, clarity shows

Video exhibits one of optical parts of an apparatus with the most important Taichun is to photograph resemble a head, show clearly each in kind that through it video extends a stage to be able to make the same score the job Taichun easily, photograph, slide come out. Photograph considering what video exhibits a stage nevertheless like ahead, the bag is contained plastic or get together fat balata composition, when these things face intense light illuminate, phenomenon of very incidental ageing, and if time grew, photograph become like the head can drop ceaselessly like the effect, video of such easy influence prolong the service life of the stage. So, photograph to ensure like the head can efficient photograph picture, we must take step, protect what good video exhibits a stage to photograph like the head; For example, do not want to will photograph the lamp light with for long intense alignment or solar line, also do not exhibit video a job be below too tall temperature environment, cannot exhibit video the stage especially after from temperature too low environment moves the environment with too high temperature to fall, use instantly. In addition, photograph to prevent to be in leave a mark like camera lens surface, the influence is become like the effect, we do not use a hand as far as possible direct feeling is photographed like camera lens, cannot let hard object bring into contact with photograph more like the head.

2, mains switch, operate correctly

Video exhibits a stage to power source, close an operation, it is certain to also have exquisite. Generally speaking, finish every time after demonstrating the task, the total mains switch in the face plate after showing video the stage directly is shut, such meetings exhibit a stage to cause certain effect to video. Correct operation is, first will before the power source pushbutton in face plate is shut, then again will hind the power source pushbutton of face plate is shut. And leaving, when involving power supply, also cannot undertake often, video of frequent after all switch postpones a meeting bulb of the buy inside the influence and photograph the service life that resembles a head, and in causing face plate easily still small touch phenomenon of switch occurrence malfunction.

In addition, to ensure video exhibits the safety of the stage, we should make the 3 core electrical outlet that video exhibits a stage to insert reliable ground connection medium; And director time is extended in video need not when perhaps fall in thunderstorm weather, should seasonable the power source that exhibits video the stage pulls out from socket come.
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