Projector applies long-standing in educationally. The free shot that drives educational modernization with informatization in the country is how-to below, the construction that school of each institution of higher learing, middle and primary school has computer classroom, multimedia classroom in succession and transform. Regard big screen as indication optimal equipment, projector received a large number of application in this process.

According to statistic, 2006, 20 country's biggest projector purchase bid sheet in, teach a trade purchase bid sheet to have 16, the largest market share was held in the industry market of projector.

The position in teaching a trade as projector is more and more significant, more and more school of middle and primary school is bought and apply projector to have teacher and student greatly. Face the huge demand of educational application market, the manufacturer also threw more and more energy, roll out more and more educational projector products. So, can have a lot of problems subsequently and come: How does educational user choose projector? Which brand provides sexual price to compare more? Which education projector suits effective education application demand more? What problem should note in the process that purchases in projector? What strong point does each product of big firm have each? Now, the article is aimed at this a series of problems, for broad education the user is elaborated one by one, open the dense fog that teachs projector choose and buy, the master that help strength selects the product that fits oneself application.

Purchase the 9 secret Ji that teachs projector

Secret Ji 1: Indication mode 4 ∶ 3 optimal

To showing pattern character, can divide commonly for 16 ∶ 9 with 4 ∶ these two kinds of 3 mode. The content that the place in classroom demonstrates to broadcast is PowerPoint or Office documentation mostly, and these content are met with 4 ∶ 3 dimension project. 9 indication projector also can broadcast 16 ∶ the file of 3 pictures of 4 ∶ , but suffer its to show scale is affected, the or so two side of the picture can appear the black edge of larger area, not only the picture can become lesser, still make an appearance possible generation is unbalanced, cause an appearance badly too shorten or spin and lack fidelity, demonstrate image to produce indication mistake to the education of certain nicety, and the main use of 9 projector of 16 ∶ is view and admire the film with, lumen is spent inferior, suit dark environment to use more, the price also taller. Reason this, to educational user, choose 4 ∶ the 3 projector that broadcast suit more.
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