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Projection screen structure

A projection screen and projection technology, which is applied in the field of projection screen structure, can solve the problems of easy fatigue of eyes, blind spots in teaching, and difficulty in meeting writing and wiping conditions.

Inactive Publication Date: 2009-05-27
蔡炳辉
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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Embodiment Construction

[0033] Please refer to FIG. 1, which is the first embodiment of the structure of the projection screen of the present invention, which is used to illustrate the structure of the wall-mounted projection screen of the present invention. The wall-mounted projection screen 10 includes a roll-up storage body 11, a projection screen 12 and a drop-down body 13, wherein , the projection screen 12 is connected between the roll-up storage body 11 and the drop-down body 13, the drop-down body 13 is provided with a positioning slot 130 for embedding and combining the projection screen 12, the roll-up storage body 11 and the drop-down body 13 They are all existing traditional devices and structures, and for the sake of simplification, the detailed descriptions of the up-roll storage body 11 and the drop-down drop body 13 are omitted.

[0034] Please refer to Fig. 1A, the structural layers of the projection screen 12 include a projection writing layer 120, a base layer 121 and an adsorption ...

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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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03B21/56G03B21/60
Inventor 蔡炳辉
Owner 蔡炳辉
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