TWI439794B - Projectable and written projection screen - Google Patents

Description

Projection screen that can be projected and written

The present invention relates to a projection screen, and more particularly to a projection screen that can be projected and written without glare.

Projection screens and whiteboards are commonly used in multimedia teaching or presentations. The projection screen can display the projected image of the projector, while the whiteboard is suitable for writing text. However, since the surface of the whiteboard is a reflective material of the paint type, if the projected image of the projector is directly displayed on the whiteboard, problems such as bright spots or severe reflections may occur, which may affect the visual effect. On the other hand, the projection screen can only be used for projection and cannot be written directly on the projection screen. Therefore, in order to achieve the dual purpose of writing and projection, it is necessary to configure a projection screen and a whiteboard at the same time, thereby increasing the cost.

Even if the teaching or presentation has a projection screen and a whiteboard that can be used at the same time, as the two devices have only a single function of projection or writing, if you want to write during projection, you must leave or close the projection screen to the whiteboard. Writing on, affecting the continuity of teaching or briefing, and causing inconvenience in the use of equipment. In addition, the general projection screen has a fixed frame, so it is not easy to carry, so the use of the projector is limited by the projection screen; in addition, the whiteboard is easy to cause glare and reflection under the indoor lighting, resulting in viewers. Can not face the text of the board, but often adjust the line of sight angle, the eyes are prone to fatigue, and long-term viewing hinders eyesight health.

In order to solve the foregoing problems, the present invention provides a projection screen that can be projected and written, comprising a flexible substrate; an anti-reflective writing layer having a viewing angle of 130 degrees to 150 degrees, wherein the writing layer is located One side of the flexible substrate; and an adhesive layer on the other side of the flexible substrate, and the adhesive layer is made of a viscose material or a magnetic substance.

Wherein, the anti-reflective writing layer comprises a plurality of micro convex lenses, and each of the micro convex lenses is made of a resin or a polymer; and each of the micro convex lenses is hemispherical, columnar, strip or tapered. Furthermore, each of the micro-convex lenses has a hemispherical shape and has a circular diameter of approximately Φ0.05 mm to Φ0.5 mm, and the micro-convex lenses are arranged in a honeycomb shape, a polygonal shape, a matrix shape or a staggered shape. The graphic can be written on the writing layer for projection, and the setting of the microlenses can make the graphic clearer and anti-reflective and anti-glare. In addition, the projection screen can be made in the form of loose-leaf paper, and the characters written on the projection screen are not easily rubbed off by the paper.

On the other hand, the material of the flexible substrate is a resin, a polymer, a paper or a cloth, and is transparent, colorless, transparent, opaque, colorless, or opaque. In addition, a release paper can be added under the adhesive layer to protect the adhesive layer. Furthermore, between the flexible substrate and the anti-reflective writing layer, or between the flexible substrate and the adhesive layer, a printing layer is provided, the printing layer having a pattern, a letter or a form.

The above polymer is polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP), polycarbonate (PC), polyethylene (PE), polyethylene terephthalate (PET). ), polyethylene terephthalate (PETP) or a mixture thereof.

The embodiments of the present invention will be further described in conjunction with the drawings, which are set forth to illustrate the features and applications of the present invention, and are not intended to limit the scope of the present invention. In the spirit and scope of the present invention, the scope of the present invention is defined by the scope of the appended claims.

Please refer to the first picture, this picture is the hair Embodiments A schematic diagram of the structure of a projection screen that can be projected and written. This hair The projection screen 10 of the embodiment can be projected and written to include a flexible substrate 11, an anti-reflective writing layer 12, and an adhesive layer 13, which can simultaneously achieve writing text, projection, and the like by the anti-reflective writing layer 12. Avoid multiple effects of reflection or glare.

The flexible substrate 11 may be made of a flexible material such as a resin (including a transparent resin or an opaque resin), a high molecular polymer, a paper material, or a cloth material, and is transparent, colorless, transparent, and colored. The opaque colorless or opaque colored, that is, the transparency and color of the flexible substrate 11 can be adjusted according to requirements or aesthetics. Among them, the polymer polymer may be polyvinyl chloride (PVC), polystyrene (PS), polypropylene (PP), polycarbonate (PC), polyethylene (polyethylene, PE), polyethylene terephthalate (PET), polyethylene terephthalate (PETP) or a mixture thereof.

The writing layer 12 is located on one side of the flexible substrate 11 and has a viewing angle of 130 degrees to 150 degrees, and can be written with a whiteboard pen or an oily pen equal to the graphic or text written thereon. The writing layer 12 includes a plurality of micro-convex lenses 121, and the material of each of the micro-convex lenses 121 is a resin or a polymer, etc. Further, each of the micro-convex lenses 121 is hemispherical, columnar, strip-shaped or tapered, wherein When each of the micro-convex lenses 121 has a hemispherical shape, the circular diameter is about Φ0.05 mm to Φ0.5 mm, and when each of the micro-convex lenses 121 has a pyramidal shape, the length and width of the rectangle at the bottom of the pyramid are about 0.05 mm. ~0.5 mm, and the micro-convex lenses 121 are arranged in a honeycomb shape, a polygon shape, a matrix shape or a staggered shape (as shown in FIGS. 3A to 3D). By appropriately adjusting the shape, size ratio and arrangement of the micro-convex lenses 121, in addition to making the viewing angle between 130 degrees and 150 degrees, the light source projected onto the writing layer 12 can be prevented from being randomly scattered or reflected, thereby preventing The purpose of glare and anti-reflection, that is, the projection light source projected onto the projection screen 10 does not form a light spot or bright spot that cannot be directly viewed, and can improve the quality of the projection and the image presentation effect, and contribute to the viewer's vision. health.

The adhesive layer 13 is located on the other side of the flexible substrate 10 for the projection screen 10 to be adhered to a surface of a material having a smooth surface such as a whiteboard, a glass or an acrylic sheet. The adhesive layer 13 is coated with a resilience adhesive or prepared from a flexible magnetic material, so that the projection screen 10 can be repeatedly attached to the surface of the material to improve the usability and use period. The material of the adhesive layer 13 and the manner of bonding the same are not limited thereto, and any material and fixing manner that can repeatedly adhere the adhesive layer 13 to the surface of the material can be applied thereto. In addition, a release paper 14 may be disposed under the adhesive layer 13 to protect the adhesive layer 13 before use, and to prevent the adhesiveness of the adhesive layer 13 from being damaged by contact with dirty materials.

Please also refer to the second A picture and the second B picture, wherein the second A picture is the hair The projection screen that can be projected and written in the embodiment is provided with a structural diagram of the printed layer, and the second B is a present embodiment. Embodiments Projections that can be projected and written are provided with another structural schematic of the printed layer. The projection screen 10 can further provide a printing layer 15 between the flexible substrate 11 and the writing layer 12, or between the flexible substrate 11 and the adhesive layer 13, and the printing layer 15 has a pattern, a text or a table. In order to improve the aesthetics and functionality of the projection screen 10, the user can assist the user to make a picture on the projection screen 10.

On the other hand, the projection screen that can be projected and written in the embodiment of the present invention can also be formed into a loose-leaf paper, and can be sandwiched in the binder so that the user can repeatedly write the text on the projection screen in the form of the leaflet. Moreover, the concave-convex structure of the micro-convex lens 121 is convexly formed by the flat writing layer 12, so that the written characters are not easily separated from other papers in the binder due to contact friction.

This hair The projection screen that can be projected and written in the embodiment can be formed by forming a micro-convex lens 121 on one surface of the flexible substrate 11 by UV embossing, thereby preparing an anti-reflective writing layer 12. Applying a suitable adhesive to the other side of the flexible substrate 11 to form the adhesive layer 13, and further providing the release paper 14 under the adhesive layer 13 or the flexible substrate 11 and A printed layer 15 is added between the writing layers 12 or between the flexible substrate 11 and the adhesive layer 13. The micro convex lens 121 is prepared by passing the flexible substrate 11 through a copper mold roller having a hemispherical, columnar, strip or tapered cavity, and the cavity is adhered. A resin (for example, a high-hardness transparent resin) or a polymer or the like which can form a material of the micro-convex lens 121, whereby the raw material is roll-printed on the flexible substrate 11 by a copper mold cylinder, followed by UV The flexible substrate 11 is irradiated with light to harden the material, that is, to form a micro-convex lens 121 having a hemispherical, columnar, stripe or tapered surface type. In addition, in order to make the image written on the projection screen 10 or projected onto the projection screen 10 clearer, an appropriate amount of the fluorescent agent and the high transparency glass may be added to the raw material of the resin or the high molecular polymer of the micro convex lens 121. a bead or a glass piece, a highly transparent granule medium or a color developing agent made of a chemical agent to brighten the light, thereby increasing the brightness of the writing layer 12; and by adding the brightness or the addition of the brightening substance, There is no need to separately set the brightening layer, etc., to avoid setting too many stacked layers, and to reduce the use of materials to meet environmental protection requirements, and to reduce the man-hour and cost of the process, and to increase the thickness of the projection screen to expand the application range.

In summary, compared to the conventional situation, it is necessary to set the whiteboard and the projection screen at the same time for writing and projection. The projection screen has both the functions of projection and writing, so only the hair is required. The projection screen is glued to the whiteboard or a smooth surface for graphic writing and wiping and image projection. It is easy to use and is not restricted by the use of the venue. It also eliminates the need to purchase expensive and costly conventional electric projections. Curtain to save equipment costs; in addition, this hair The projection screen has the advantages of high brightness, bright color, uniform light, no glare and anti-reflection. No bright spots or spots are generated during writing or projection, and the viewing angle can reach 130 degrees to 150 degrees. The picture is clear and identifiable, allowing the viewer to comfortably face the picture on the projection screen, and the eyes are not tired for a long time. On the other hand, due to its high brightness, even if projected in a brighter environment, the presented image is clearly visible without the need to turn off the light, so when using the projection screen of the present invention, there is no need to switch the switch light. Make teaching or presentations sustainable. Furthermore, this issue The projection screen is film-shaped and can be retracted, so it is easy to carry and store.

10. . . Projection Screen

11. . . Flexible substrate

12. . . Writing layer

121. . . Micro convex lens

13. . . Adhesive layer

14. . . Release paper

15. . . Printed layer

The first picture is the hair The structure diagram of the projection screen which can be projected and written in the embodiment.

The second A picture is the hair Embodiments Projection screens that can be projected and written are provided with a schematic structural view of a printed layer.

The second B picture is the hair Embodiments Projections that can be projected and written are provided with another structural schematic of the printed layer.

The third A picture is the hair The hemispherical micro-convex lens of the projection screen that can be projected and written in the embodiment is a top view of the honeycomb arrangement.

The third B picture is the hair The projection view of the (circular) columnar micro-convex lens of the projection screen that can be projected and written in a polygonal shape is a top view.

The third C picture is the hair In the embodiment, the strip-shaped micro-convex lenses of the projection screen that can be projected and written are arranged in a matrix view.

The third D picture is the hair In the embodiment, the tapered micro-convex lenses of the projection screen which can be projected and written are arranged in a staggered plan view.

10. . . Projection Screen

11. . . Flexible substrate

12. . . Writing layer

121. . . Micro convex lens

13. . . Adhesive layer

Claims (11)

A projection screen capable of projection and writing, comprising: a flexible substrate; an anti-reflective writing layer on one side of the flexible substrate, the writing layer comprising a plurality of micro-convex lenses; an adhesive layer Is located on the other side of the flexible substrate; and a printed layer disposed between the flexible substrate and the anti-reflective writing layer, or the flexible substrate and Between the adhesive layers. The projection screen of claim 1, wherein each of the micro-convex lenses is hemispherical, columnar, strip-shaped or tapered. The projection screen of claim 1, wherein each of the micro-convex lenses has a hemispherical shape and has a circular diameter of about Φ 0.05 mm to Φ 0.5 mm. The projection screen of claim 1, wherein the micro-convex lenses are arranged in a honeycomb shape, a polygon shape, a matrix shape or a staggered shape. The projection screen of claim 1, wherein the material of each of the micro-convex lenses is a resin or a polymer. The projection screen of claim 1, wherein the material of the flexible substrate is a resin, a polymer, a paper or a cloth. The projection screen of claim 1, wherein the adhesive layer is made of a viscose material or a magnetic substance. The projection screen of claim 1, wherein the flexible substrate is Transparent, colorless, transparent, opaque, colorless or opaque. The projection screen of claim 1, wherein the printed layer has a pattern, a text or a form. The projection screen of the first aspect of the patent application can be made into a loose-leaf paper form, and the characters written on the projection screen are not easily rubbed off by the paper. The projection screen of claim 1, wherein the anti-reflective writing layer has an anti-reflection and anti-glare viewing angle of 130 degrees to 150 degrees.