Projection screen structure

Abstract

The invention provides a projection curtain structure which comprises a projection curtain and a word mopping board wiper. The projection curtain comprises a projection writing layer with a rough face; and an absorption layer which is adhered to and is connected with the projection writing layer. The word mopping board wiper comprises a board casing and a wiping body, wherein the wiping body is made of hydroscopic synthesized sponge. Therefore, the projection curtain can have the projection without light spot reflection; and the words on the projection curtain can be simply and conveniently mopped off through the hydroscopic synthesized sponge. In addition, the projection curtain structure has high economical efficiency and consequently can be universally generalized and industrially utilized.

Description

technical field [0001] The present invention relates to a projection screen structure, in particular to a writable and erasable projection screen structure that provides the best writing and erasing function for a projection whiteboard and has all-round usability. Background technique [0002] The integration of projected multimedia into teaching or business presentations has been practiced for many years. With the unique physical simulation situation of multimedia content, it can make teachers' teaching methods richer and more vivid, and also make the presentation business to the extreme. Moreover, the projected multimedia can be used repeatedly. It also saves the time for making many physical teaching materials and presentations in the future and the benefits of re-editing and utilizing. However, the use of traditional blackboards and whiteboards does not require pre-recording like projected multimedia, and any questions between teachers and students or in the interactive ...

AI Technical Summary

Problems solved by technology

[0005] In the process of thinking about the invention, the inventor found that in the existing projection-type whiteboard structure design, because the pores between the molecules of the surface material of the whiteboard are relatively small, the pigment of the whiteboard pen is not easy to enter the gap through the pores, and it is convenient for writing. Wiping operation, but because the molecular gap on the surface of the whiteboard is too small, it is as smooth as a mirror in human vision and touch, and it is easy to cause the dazzling bright spots of the projected beam during projection, thus causing an inevitable teaching dead zone area and making learners The eyes are prone to fatigue or the vision is impaired after long-term viewing; if the surface of the whiteboard is roughened, the light can be diffused without forming bright spots

However, rough whiteboards (or curtains) are not easy to wipe the text or graphics highly non-visually after writing (that is, at least 90% of the wiping cleanliness is required), and it is difficult to meet the necessary writing requirements of the basic whiteboard. wiping condition

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