PROJECTION BOARD

Abstract

A projection board provides an acrylic transparent base material with a flat facial side thereof uniformly adhered with a metal grain layer made of aluminum powder to show an image projected from a projector brightly by means of refection of the metal grain layer. Further, another flat facial side of the transparent base material is uniformly adhered with a frosted layer, which has light penetration rate between 40 to 95% and thickness between 1 to 4 micrometers for obtaining much better effect of image display.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention:

The present invention is related to a projection board and particularly to a projection board, which is capable of showing a projected image brightly with beautiful color like a crystal.

2. Brief Description of the Related Art:

Due to projector being developed, the work such as teaching or briefing can be carried out much fast and easily. Progress of technology makes a color projector possible to connect with a desk top computer or a lap top computer for digital image data saved in the computer being sent to the projector and projected to a projection board.

Recently, quality of the digital image related to color of image and pixel is improved greatly with aid of unceasing reach and development of electronic technology. Hence, how to obtain an image on the projection board vividly is a subject worth the suppliers and manufacturers of the projector and the projection board to care.

SUMMARY OF THE INVENTION

Accordingly, an object of the present invention is to provide a projection board which is capable of displaying an image projected by the projector vividly.

Another object of the present invention is to provide a projection board which is capable of showing the image brightly with beautiful colors.

In order to achieve the preceding objects, the projection board according to the present invention includes a transparent base material being a flat plate with a first flat facial side and a second flat facial side opposite to each other and a metal grain layer being uniformly adhered onto the first flat facial side to reflect and show the image.

In a preferred embodiment of the present invention provides a transparent base material made of glass, plastics, film or acrylics for being adhered with a metal grain layer to enhance visual effect like crystal of the projection board.

In another preferred embodiment of the present invention provides a metal grain layer made of silver powder or aluminum powder to reflect and show the image projected by the projector, wherein adhesive such as resin is employed to adhere the metal grain layer onto the first flat facial side of transparent base material or a plastic film is employed to be attached with the metal grain layer and adhered onto the first flat facial side.

In a further preferred embodiment of the present invention provides a frosted layer uniformly adhered to the second flat facial side of the transparent base material and the frosted layer has 40 to 95% light penetration rate and 1 to 4 micrometers thickness.

In a further preferred embodiment of the present invention provides a plastic film as the transparent base material and a yarn net made of nylon or polyester is adhered onto the frosted layer to enhance effect of projection and reinforce strength of the projection board.

In a further preferred embodiment of the present invention provides a plastic film as the transparent base material and a yarn net made of nylon or polyester and another plastic film are adhered onto the metal grain layer sequentially to reinforce strength of the projection board.

In a further preferred embodiment of the present invention provides a plastic film as the transparent base material and another plastic film and a yarn net made of nylon or polyester are adhered onto the metal grain layer sequentially to reinforce strength of the projection board.

BRIEF DESCRIPTION OF THE DRAWINGS

The detail structure, the applied principle, the function and the effectiveness of the present invention can be more fully understood with reference to the following description and accompanying drawings, in which:

FIG. 1 is a perspective view of a transparent base plate for a projection board according to the present invention;

FIG. 2 is a perspective view of the first embodiment of a projection board according to the present invention;

FIG. 3 is a perspective view of the second embodiment of a projection board according to the present invention;

FIG. 4 is a perspective view of the third embodiment of a projection board according to the present invention;

FIG. 5 is a sectional view of the fourth embodiment of a projection board according to the present invention;

FIG. 6 is a sectional view of the fifth embodiment of a projection board according to the present invention; and

FIG. 7 is a sectional view of the six embodiment of a projection board according to the present invention.

DETAILED DESCRIPTION OF THE INVENTION

Referring to FIGS. 1 to 4, the first to third embodiment of a projection board according to the present invention are illustrated. The projection boards 10, 20, 30 are provided to allow a projector (not shown) performing projections. That is, images can be projected to the projection boards 10, 20, 30 clearly and brightly with beautiful colors by the projector even if the indoor lighting is not turned off.

The respective projection board 10, 20, 30 basically provides a flat plate shaped transparent base material 11, which is made of such as glass, plastics, film or acrylic. To intensify visual effect of the projection board is the purpose of using the transparent base material 11 such that the projection board looks like crystal once the projector is in operation.

It can be seen in FIGS. 1 to 4, the transparent base material 11 is flat plate shape with a first facial side 111 and a second facial side 112 opposite to each other. The first facial side 111 is uniformly adhered with a metal grain layer 12, in which the metal grains are prepared in a form of such as silver powder or aluminum powder (not shown in FIG. 4). It is preferable that the metal grain layer 12 is arranged with 100% light shielding rate to reflect the image projected by the projector such that the projection board 10, 20, 30 is capable of showing the image clearly and brightly.

The method for the metal grain layer 12 being adhered to the base material 11 shown in FIG. 2 is to mix the metal grains such as silver powder or aluminum powder with adhesive such as resin first and then the adhesive mixture is sprayed or printed over the transparent material 11 directly or over the plastic film before transferring to the transparent base material 11. As for the method for the metal grain layer 12 being adhered to the base material 11 shown in FIG. 3 is to spray or print the adhesive mixture onto a plastic film 13 made of such as polycarbonate, PVC or PET and then adhere the plastic membrane 13 onto the transparent base material 11 directly or with back glue.

In order to enhance durability of the projection board 10, 20, 30, anti-friction powder can be added in the mixture of the adhesive and the metal grains to increase hardness of the metal grain layer 12 over 1 H so as to provide a property of being anti-scratch and wearable.

The second flat facial side 112 of the transparent base material 11 shown in FIG. 4 is uniformly adhered a frosted layer 31 in addition to the metal grain layer 12 at the first flat facial side 111, which is the same as the metal grain layer 12 shown in FIGS. 1 and 2. The frosted layer 31 is a thin layer of glass powder, mica powder, quartz powder or wax glued to the second flat facial side 112 directly or a plastic membrane with the frosted layer glued to the second flat facial side 112. The frosted layer 31 has a light penetration rate between 40 to 95% and has a thickness between 1 to 4 micrometers. It is preferable that the thickness of frosted layer is 2 micrometer.

Hence, the image can be projected to the second flat facial side 112 of the transparent material 11 of the projection board 30 shown in FIG. 4 in addition to being projected to the first flat facial side 111. The frosted layer 31 on the second flat facial side is capable of scattering the strong concentrative light from the projector to avoid the projected image hurting the eyes. It has been performed a test and the test shows that the image projected onto the second flat facial side 112 provides much better effect of image quality than that projected onto the first flat facial side 111.

Referring to FIG. 5, the fourth embodiment of the projection board according to the present invention is illustrated. Similarly, a plastic film 53 made of such as polycarbonate, PVC or PET is arranged as the base material with one of the facial sides thereof adhered with a metal grain layer 54 and the other facial side thereof adhered with a frosted layer 52. Further, a yarn net made of nylon or polyester is adhered onto the frosted layer 52 to enhance projecting effect of the projection board 50 and reinforce strength of the projection board 50.

Referring to FIG. 6, the fifth embodiment of the projection board according to the present invention is illustrated. Similarly, a plastic film 62 made of such as polycarbonate, PVC or PET is arranged as the base material with one of the facial sides thereof adhered with a metal grain layer 63 and the other facial side thereof adhered with a frosted layer 61. Further, a yarn net 64 made of nylon or polyester is adhered onto the metal grain layer 63 and another plastic film 65 made of polycarbonate, PVC or PET is adhered onto the yarn net 64 to reinforce strength of the projection board 60.

Referring to FIG. 7, the sixth embodiment of the projection board according to the present invention is illustrated. Similarly, a plastic film 72 made of such as polycarbonate, PVC or PET is arranged as the base material with one of the facial sides thereof adhered with a metal grain layer 73 and the other facial side thereof adhered with a frosted layer 71. Further, another plastic film 74 made of polycarbonate, PVC or PET is adhered onto the metal grain layer 73 and a yarn net 75 made of nylon or polyester is adhered onto the second plastic film 74 to reinforce strength of the projection board 70.

While the invention has been described with referencing to preferred embodiments thereof, it is to be understood that modifications or variations may be easily made without departing from the spirit of this invention, which is defined by the appended claims.

Claims

1. A projection board, which is suitable of showing an image projected by a projector, comprising:

a transparent base material being a flat plate with a first flat facial side and a second flat facial side opposite to each other; and

a metal grain layer being uniformly adhered onto the first flat facial side to reflect and show the image.

2. The projection board as defined in claim 1, wherein the transparent base is made of such as glass, plastics, thin film or acrylic.

3. The projection board as defined in claim 1, wherein the metal grain layer is made of silver powder or aluminum powder.

4. The projection board as defined in claim 1, wherein the metal grain layer is adhered to the first flat facial side with adhesive.

5. The projection board as defined in claim 1, wherein the metal grain layer is attached to a first plastic film and the first plastic film is adhered to the first flat facial side.

6. The projection board as defined in claim 1, further comprises a frosted layer, which is uniformly adhered to the second flat facial side and provides a specific light penetration rate.

7. The projection board as defined in claim 6, wherein the light penetration rate is between 40 to 95%.

8. The projection board as defined in claim 6, wherein the thickness of frosted layer is between 1 to 4 micrometers.

9. The projection board as defined in claim 6, wherein frosted layer is a thin layer made of glass powder, mica powder, quartz powder or wax.

10. The projection board as defined in claim 6, further comprises a yarn net adhered onto the frosted layer.

11. The projection board as defined in claim 10, wherein the yarn net is made of nylon or polyester fiber.

12. The projection board as defined in claim 6, further comprises:

a yarn net adhered onto the metal grain layer; and

a second plastic film adhered onto the yarn net.

13. The projection board as defined in claim 12, wherein the yarn net is made of nylon or polyester fiber.

14. The projection board as defined in claim 6 further comprises:

a second plastic film adhered onto the metal grain layer; and

a yarn net adhered onto the second plastic film.

15. The projection board as defined in claim 14, wherein the yarn net is made of nylon or polyester.

16. The projection board as defined in claim 1, wherein the metal grain layer provides 100% light shielding rate.

17. The projection board as defined in claim 1, wherein the metal grain layer contains anti-friction powder and provides hardness over 1 H.