Sep 25 2011
Replacement Board
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Turret Circuit Board Replacement For Fender 5F1 Tweed Champ Homebrew Amp |  |
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US $16.49 | 28d 22h 22m |
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Replacement Board
How-To-Tutorial: Dell inspiron 1525/1526 DC Power Jack Circuit Board Replacement
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Turret Circuit Board Replacement For Fender 5F1 Tweed Champ Homebrew Amp | |
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US $16.49 | 28d 22h 22m |
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LED writing board gives you a colourful world
A LED writing board having the LED function of a picture comprises a board surface, a roll-up curtain, a frame surrounding the roll-up curtain and a pair of scrolls. The frame consists of a frame seat and a plurality of frame surfaces that can be easily replaced. The scrolls are hidden behind two opposite frame surfaces, wherebetween the roll-up curtain situates. The roll-up curtain is subsequently connected picture, projection screen and soft plastic writing board of scrolling type, whereby the LED writing board can appear as an LED device or another writing device when the original writing board is not being using. The LED writing board can be further equipped with lights to make the picture more visually appealing.
1. ALED writing board, comprising: a board surface; a frame further comprise frame surfaces capable of being closed on and separated from said frame; a pair of scrolls mounted on inner sides of a pair of opposite frame surfaces, each having an elastic shaft flexibly attached to said scrolls, said scrolls having respective pressing rods located on two inner lateral sides thereof; and a roll-up curtain rotationally mounted within at least one scroll, said roll-up curtain is provided with a guiding member along a front edge thereof, two ends of said guiding member being pulled and connected to the other scroll by a pair of bracing cords.
2. The LED writing board of claim 1 wherein an outer lateral side of the frame seat of said frame is provided with a set of wedge matching pieces for engaging with corresponding wedge troughs of said scrolls; a plurality of flexible pieces being sandwiched by said frame and said frame surfaces; one end of each of said flexible pieces being disposed in said trough of said frame, the other end of each of said flexible pieces being disposed in a trough of one frame surface.
3. The LED writing board of claim 1 wherein said frame surfaces are attached to said frame by the engagement between said wedge matching pieces and said wedge troughs, whereby said frame surfaces can be easily replaced.
4. The LED writing board of claim 1 wherein each of said elastic shafts has its two ends retained within bearing mounts of a corresponding said scroll, whereby said elastic shafts exert a suitable pressing against respective said scrolls.
5. The LED writing board of claim 1 wherein an inner side of each of said scrolls is provided with two pressing rods, at least one of said pressing rods being retained between said bearing mounts of a said scroll; the elastic pressing between each of said pressing rods being controlled by a spring.
6. The LED writing board of claim 1 wherein said scroll are hollow tubular bodies each provided with a slit for respectively retaining a fastening stick of said roll-up curtain therein and said guiding member of said roll-up curtain; moreover, along one side of each of said slits there forming an oblique fringe for a smooth extension of said roll-up curtain whereby marks of uneven scrolling on said roll-up curtain will not occur.
7. The LED writing board of claim 1 wherein inner sides of an opposite pair of said frame surfaces of said frame are further equipped with lighting devices, selected from regular bulbs and fluorescent tubes, said lighting devices emitting lights though light emitting slits of said frame to achieve the desired visual effect.
8. The LED writing board of claim 1 wherein said extendable roll-up curtain comprises at least one picture.
9. The LED writing board of claim 1 wherein said roll-up curtain is subsequently connected picture, projection screen and soft plastic writing board of scrolling type.
The present invention relates to writing boards (such as blackboards and whiteboards), more particularly to an LED writing board having an easily changeable frame for LED purposes. The LED writing board comprises a board surface, a roll-up curtain, a frame surrounding the roll-up curtain and a pair of scrolls. The frame consists of a frame seat and a plurality of frame surfaces that can be easily replaced. The scrolls are hidden behind two opposite frame surfaces, wherebetween the roll-up curtain situates. The roll-up curtain is subsequently connected picture, projection screen and soft plastic writing board of scrolling type, whereby the LED writing board can be used as an LED device or another writing device when the original writing board is used. The LED writing board can be further equipped with lights to make the picture it shows more visually appealing.
The primary objective of the present invention is to provide an LED writing board comprises a board surface, a roll-up curtain, a frame surrounding the roll-up curtain and a pair of scrolls. The frame consists of a frame seat and a plurality of frame surfaces that can be easily replaced. The secondary objective of the present invention is to provide a LED writing board wherein the scrolls are hidden behind two opposite frame surfaces, between which the roll-up curtain situates. The roll-up curtain is subsequently connected picture, projection screen and soft plastic writing board of scrolling type, whereby the LED writing board can appear as an LED device or another writing device when the original writing board is not being using. The third objective of the present invention is to provide an LED writing board further equipped with lights to make the picture more visually appealing.
The present invention has the advantages of: being a wall picture, when the writing function of the board is not used; being a projection screen for a m projector, when the writing function of the board is not used; being a soft plastic writing board of scrolling type, when the writing function of the board is not used; being more practical; being more valuable; being more competitive in the market.
The various objects and advantages of the present invention will be more readily understood from the following detailed description when read in conjunction with the appended drawings.
About the Author
A LED writing board having the LED function of a picture comprises a board surface, a roll-up curtain, a frame surrounding the roll-up curtain and a pair of scrolls. The frame consists of a frame seat and a plurality of frame surfaces that can be easily replaced. The scrolls are hidden behind two opposite frame surfaces, wherebetween the roll-up curtain situates.
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