阅读说明：本技术 可书写投影屏幕 (Writable projection screen ) 是由 苏方旋 陈家骅 许富强 曾志能 谢启堂 于 2018-06-11 设计创作，主要内容包括：一种可书写投影屏幕,包括基板、反射层以及书写层。反射层配置于基板上,书写层具有受光面。受光面用于接收投影光束,受光面的粗糙度介于5μm与30μm之间。基板配置于反射层与书写层之间,或是反射层配置于基板与书写层之间。可书写投影屏幕具有良好的显示品质外,还可供多种笔书写。(A writable projection screen includes a substrate, a reflective layer, and a writing layer. The reflecting layer is arranged on the substrate, and the writing layer is provided with a light receiving surface. The light receiving surface is used for receiving the projection light beam, and the roughness of the light receiving surface is between 5 and 30 microns. The substrate is arranged between the reflecting layer and the writing layer, or the reflecting layer is arranged between the substrate and the writing layer. The writable projection screen has good display quality and can be used for writing by various pens.)

1. A writable projection screen, comprising:

a substrate;

a reflective layer disposed on the substrate; and

a writing layer having a light receiving surface for receiving a projection light beam, the light receiving surface having a roughness of between 5 μm and 30 μm,

the substrate is disposed between the reflection layer and the writing layer, or the reflection layer is disposed between the substrate and the writing layer.

2. The writable projection screen of claim 1, wherein the substrate is a flexible substrate.

3. The writable projection screen of claim 1, wherein the reflective layer has a thickness greater than or equal to 20 μ ι η.

4. The writable projection screen of claim 1 wherein the reflective layer is a reflective pigment layer having a pigment weight percent of greater than or equal to 50 wt%.

5. The writable projection screen of claim 1, wherein the material of the reflective layer comprises a light curable resin.

6. The writable projection screen of claim 1, wherein the thickness of the writing layer is between 7 μ ι η and 40 μ ι η.

7. The writable projection screen of claim 1, wherein the roughness of the light-receiving surface is between 5 μ ι η and 15 μ ι η.

8. The writable projection screen of claim 1, wherein the writing layer is a transparent writing layer.

9. The writable projection screen of claim 1, wherein the material of the writing layer comprises a light curable resin.

10. The writable projection screen of claim 9, wherein the material of the writing layer further comprises at least one of a fluoride and a silicide.

11. The writable projection screen of claim 1, wherein the hardness of the writing layer is greater than or equal to 3H/500 g.

12. The writable projection screen of claim 1, further comprising a touch sensing film, the substrate and the reflective layer being disposed between the touch sensing film and the writing layer, the touch sensing film being a capacitive touch sensing film or an electromagnetic touch sensing film.

Technical Field

The present invention relates to a projection screen, and more particularly, to a writable projection screen.

Background

With regard to the mode of present common preparation blackboard, one kind is after painting blackboard lacquer material on the plank substrate, enters the oven and heats and toasts and form, because the substrate of this mode is hard formula, can not roll up and warp, if the size of blackboard is too big, then inconvenient carrying. The other is to coat more than two layers of blackboard paint on the cement wall, and the blackboard paint can be used after drying after several days, and the use of the blackboard paint is limited on a specific substrate, and the blackboard paint has the bottleneck in mass production.

On the other hand, because the current black board base material is a wood board or a cement wall, when the black board is used as a projection screen, the bottom color is dark green, the gain function cannot be performed on the projection light, the visual sense and the color saturation of a projection picture are affected, and the color distortion is caused.

The background section is provided to facilitate understanding of the present invention, and thus, the disclosure in the background section may include some well-known techniques that do not constitute a part of the common general knowledge of those skilled in the art. Furthermore, the statements contained in the "background" section do not represent a representation of the claimed subject matter or the problems associated with one or more embodiments of the present disclosure, nor are they representative of what is known or appreciated by those skilled in the art prior to the present disclosure.

Disclosure of Invention

The invention provides a writable projection screen which not only has good display quality, but also can be used for writing by various pens.

Other objects and advantages of the present invention will be further understood from the technical features disclosed in the present invention.

The writable projection screen provided by one embodiment of the invention comprises a substrate, a reflecting layer and a writing layer. The reflecting layer is arranged on the substrate, and the writing layer is provided with a light receiving surface. The light receiving surface is used for receiving the projection light beam, and the roughness of the light receiving surface is between 5 and 30 microns. The substrate is arranged between the reflecting layer and the writing layer, or the reflecting layer is arranged between the substrate and the writing layer.

In the writable projection screen provided by the embodiment of the invention, the reflection layer is used for reflecting the projection light beam, so that the writable projection screen has a better reflection effect and can improve the display quality. In addition, the roughness of the light receiving surface of the writing layer is between 5 μm and 30 μm, so that the writing layer can be used for writing by various different types of pens, such as chalk (chalk), water (powder) pens, white board pens (white board markers), crayon (crayon), and the like, and can replace the traditional white board and blackboard, and has an anti-glare effect when displaying a projection picture.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic diagram of a writable projection screen receiving a projection beam according to an embodiment of the invention.

Fig. 2 is a schematic diagram of a writable projection screen in accordance with another embodiment of the invention.

Fig. 3 is a schematic diagram of a writable projection screen in accordance with another embodiment of the invention.

Fig. 4 is a schematic diagram of a writable projection screen in accordance with another embodiment of the invention.

Detailed Description

The foregoing and other features and advantages of the invention will be apparent from the following, more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Directional terms as referred to in the following examples, for example: up, down, left, right, front or rear, etc., are referred to only in the direction of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting.

Fig. 1 is a schematic diagram of a writable projection screen receiving a projection beam according to an embodiment of the invention. Referring to fig. 1, a writable projection screen 100 of the present embodiment includes a substrate 110, a reflective layer 120 and a writing layer 130. The reflective layer 120 is disposed on the substrate 110, and in the present embodiment, the reflective layer 120 is disposed between the substrate 110 and the writing layer 130, for example. The writing layer 130 has a light receiving surface 131, and the light receiving surface 131 is used for receiving the projection light beam 201 projected by the projector 200.

In the present embodiment, the projection light beam 201 passes through the light receiving surface 131 and is reflected by the reflective layer 120, so that the user U can see the projection image. The reflective layer 120 is, for example, a reflective pigment layer, the weight percentage of the pigment in the reflective pigment layer is, for example, greater than or equal to 50 wt%, and the thickness D1 of the reflective layer 120 is, for example, greater than or equal to 20 μm, but is not limited thereto. The thickness D1 of the reflective layer 120 can be adjusted depending on the weight percentage of the pigment. The pigment may be at least one of red, green, blue, white, etc. under visible light, but is not limited to the above colors. In one embodiment, the pigment color selected may be a pigment of a light color system, such as a pigment of light red, light green, or light blue under visible light. In the present embodiment, the color of the pigment and the thickness D1 are adjusted to make the writable projection screen 100 have a better color saturation when displaying the projection picture and avoid color distortion from affecting the visual perception of the user U, so that the writable projection screen 100 has a good display effect. In addition, the surface 121 of the reflective layer 120 facing the writing layer 130 is, for example, a flat surface to enhance the display effect. In the present embodiment, the surface 121 of the reflective layer 120 is located between the light receiving surface 131 of the writing layer 130 and the substrate 110. In addition, the material of the reflective layer 120 may include a photo-curing material (e.g., a photo-curing resin), but is not limited thereto. In this embodiment, during the manufacturing process, a chemical glue (for example, a photo-curing resin, i.e., a material for forming the reflective layer 120) may be first applied to the substrate 110, and then a photo-curing process is performed to form the reflective layer 120, but the invention is not limited thereto.

In the present embodiment, the thickness of the writing layer 130 is, for example, 40 μm or less. In one embodiment, the thickness of the writing layer 130 is, for example, between 7 μm and 40 μm. The writing layer 130 is, for example, a transparent writing layer, but a pigment may be added to the writing layer 130 as needed. The light-receiving surface 131 of the writing layer 130 may have a pattern, and the light-receiving surface 131 having the pattern has a rough surface. The roughness of the light receiving surface 131 of the writing layer 130 is between 5 μm and 30 μm, so that the user U can easily write and erase on the writing layer 130 using various types of pens such as a chalk, a water (powder) pen, a white board pen, a crayon, and the like. If the roughness is less than 5 μm, writing is difficult, and if the roughness is more than 30 μm, wiping is difficult. Since the writing layer 130 can be used for writing with chalk and whiteboard pens, the writable projection screen 100 of the present embodiment can be used as both a blackboard and a whiteboard. The chalk comprises various chalks such as a traditional chalk (the main component of which comprises calcium sulfate), an environment-friendly chalk (the main component of which comprises calcium carbonate), a water-wiping chalk and the like. In one embodiment, the roughness of the light receiving surface 131 may be between 5 μm and 15 μm to facilitate writing and erasing with a whiteboard pen. In addition, since the light receiving surface 131 has the roughness, the glare-proof effect can be achieved when the projection light beam 201 is received, so that the user U is prevented from dazzling during viewing. In the present embodiment, the roughness of the light receiving surface 131 has a positive correlation with the anti-glare degree, for example.

In order to provide the writing layer 130 with better durability, the hardness of the writing layer 130 is, for example, greater than or equal to 3H/500g, or even greater than or equal to 3H/765 g. The hardness here is measured in a pencil hardness meter, where 3H denotes that the hardness of the pencil is 3H, and 500g denotes that the load of the pencil is 500 g. The 3H/500g hardness of the writing layer 130 means that the writing layer 130 is not damaged when a pen having a hardness of 3H is used to write on the writing layer 130 under a load of 500 g. The material of the writing layer 130 can be selected from a hard glue, such as Acrylic, but not limited thereto. Further, the material of the writing layer 130 includes, for example, a light-curing material (e.g., a light-curing resin), but is not limited thereto. In this embodiment, during the manufacturing process, a chemical glue (e.g., a photo-curable resin, i.e., a material for forming the writing layer 130) is first applied to the substrate 110, and then a photo-curing process is performed to form the writing layer 130. In addition, the material of the writing layer 130 may further include an anti-fingerprint material, such as at least one of fluoride and silicide, to prevent fingerprints from remaining on the writing layer 130.

The substrate 110 may be a flexible substrate or a rigid substrate, wherein the flexible substrate can be rolled, so that the writable projection screen 100 has an advantage of easy movement. In addition, in the embodiment where the substrate 110 is a flexible substrate, the reflective layer 120 and the writing layer 130 can be formed on the substrate 110 in a roll-to-roll (roll) manner, and the material forming the reflective layer 120 and the writing layer 130 can be a photo-curing material, but is not limited thereto. Thus, the present embodiment has the advantages of being fast in production, capable of mass production, and capable of being cut into required sizes at will. In one embodiment, the substrate 110 may be a transparent substrate or an opaque substrate, and the color of the opaque substrate is not limited in this embodiment.

Although the reflective layer 120 is disposed between the substrate 110 and the writing layer 130 in fig. 1, in another embodiment, as shown in the writable projection screen 100a of fig. 2, the substrate 110 may be disposed between the reflective layer 120 and the writing layer 130. In fig. 2, the substrate 110 is, for example, a light-transmitting substrate for the projection light beam to pass through.

Fig. 3 is a schematic diagram of a writable projection screen in accordance with another embodiment of the invention. Referring to fig. 3, the writable projection screen 100b of the present embodiment is similar to the writable projection screen 100 of fig. 1, and the main difference is that the writable projection screen 100b of the present embodiment further includes a touch sensing film (sensor film)140, wherein the substrate 110 and the reflective layer 120 are disposed between the touch sensing film 140 and the writing layer 130. The touch sensing film 140 is attached to the side of the laminated structure 102 away from the writing layer 130 after the laminated structure 102 composed of the substrate 110, the reflective layer 120 and the writing layer 130 is completed. The touch sensing film 140 may be a capacitive touch sensing film or an electromagnetic touch sensing film. The capacitive touch sensing film can sense writing and manipulation of, for example, a finger or a conductive pen, and the electromagnetic touch sensing film can sense writing and manipulation of, for example, an electromagnetic pen (electromagnetic stylus). In the present embodiment, the touch sensing film 140 has, for example, a processing chip (not shown), and the processing chip is electrically connected to the computer to transmit the sensed touch signal to the computer, but is not limited thereto. In this way, the writable projection screen 100b of the present embodiment not only allows a user to write, but also can be used as a touch-enabled projection screen.

The touch sensing film 140 can also be applied to the writable projection screen 100 a. As shown in fig. 4, the touch sensing film 140 of the writable projection screen 100c is attached to the side of the laminated structure 102a away from the writing layer 130 after the laminated structure 102a composed of the substrate 110, the reflective layer 120 and the writing layer 130 is completed, for example.

In summary, in the writable projection screen according to the embodiment of the invention, the reflective layer is used to reflect the projection beam, so that the writable projection screen has a better reflection effect, and the display quality can be further improved. In addition, the roughness of the light receiving surface of the writing layer is between 5 and 30 μm, so that the writing layer can be used for writing by various different types of pens, such as chalks, water (powder) pens, white board pens, crayons and the like, and can replace the traditional white boards and blackboards and also has the effect of glare resistance when a projection picture is displayed.

It should be understood that the above-mentioned embodiments are only preferred embodiments of the present invention, and that the scope of the present invention should not be limited thereby, and all the simple equivalent changes and modifications made by the claims and the summary of the invention should be included in the scope of the present invention. Moreover, it is not necessary for any embodiment or claim of the invention to address all of the objects, advantages, or features disclosed herein. Furthermore, the abstract and the title are provided for assisting the search of the patent document and are not intended to limit the scope of the invention.