KR20230032409A - Screen for projector with improved viewing angle and luminance, and reflective paint for manufacturing the same and screen manufacturing method using the same - Google Patents

Abstract

The present invention relates to a screen for a projector with an improved viewing angle and luminance, a reflective paint for manufacturing the same, and a screen manufacturing method using the same, and more specifically, in forming a reflecting layer reflecting a beam emitted from a projector, optimizes a composition and an element ratio of reflective paints applied, thereby having a wide viewing angle and high luminance. In particular, the present invention improves viewing angle and luminance characteristics of a screen through a process of increasing a surface roughness of a reflecting layer without forming a separate diffusing layer, thereby obtaining a wide viewing angle and high luminance while minimizing a manufacturing process of a screen. In addition, the present invention has different colors and color temperature characteristics depending on whether aluminum particles constituting the reflecting layer is coated by carbon black or not, thereby providing a screen optimized for a use environment. Accordingly, the present invention can improve the reliability and competitiveness in fields such as screens for a projector and front projection, screens having wide viewings angle and high luminance, paints used to manufacture the screens, and method for applying the paint, and fields similar to or related to the same.

Description

Screen for projector with improved viewing angle and luminance, and reflective paint for manufacturing the same and screen manufacturing method using the same}

The present invention relates to a projector screen with improved viewing angle and luminance, a reflective paint for manufacturing the same, and a screen manufacturing method using the same, and more particularly, to a reflective paint applied in forming a reflective layer that reflects a beam emitted from a projector. By optimizing the composition and component ratio of, it has a wide viewing angle and high luminance characteristics.

In particular, the present invention improves the viewing angle and luminance characteristics of the screen through a process of increasing the surface roughness of the reflective layer without forming a separate diffusion layer, thereby minimizing the manufacturing process of the screen while obtaining a wide viewing angle and high luminance characteristics. And it relates to a projector screen with improved luminance, a reflective paint for manufacturing the same, and a screen manufacturing method using the same.

Recently, along with the increase in consumption of high-quality and large-capacity multimedia contents, large-size and high-definition display screens are required.

As a display device suitable for these needs, various types are being developed, but among them, a projector is a display that can sufficiently satisfy the demand for large-size and high-definition functionally at a low cost.

A projector is a device that projects a desired image onto a screen or a wall, and may be used to implement a presentation in a conference room or a home theater at home.

The projector screen used at this time reflects or projects the image emitted from the projector so that the viewer (user) located in the front can see the image. Front projection type, rear projection type, roll type, fixed type, wall attachment It is manufactured in a variety of shapes.

As one of these projector screens, Korean Patent Publication No. 10-2013-0101268 'Multipurpose Matte Adhesive Sheet' (hereinafter referred to as 'prior art'), which is a prior art document, can be used instead of a blackboard or whiteboard. It is possible to write with various types of writing instruments, can be easily erased, and can be easily attached to a wall or the like when necessary so that it can be used as a screen for a projector.

On the other hand, in general screens for beam projectors, since the viewer (user) mainly watches the image from the front, as discussed above, various technologies such as reflection characteristics are being developed, but the viewing angle is not greatly considered, so most of the viewing angles are It has the characteristic of being narrow.

In the case of the prior art, the technical feature is to enable easy erasing of written contents and to enable easy attachment and detachment using magnetic force, and the reflective structure is not very different from the structure of a general beam projector screen, and through this, the prior art In the case of , it can be inferred that the viewing angle is narrow.

On the other hand, the prior art is intended to be used for taking notes while displaying lecture videos in classes at schools or academies. There is a problem that there is difficulty in .

Republic of Korea Patent Publication No. 10-2013-0101268 'Multipurpose matte adhesive sheet'

In order to solve the above problems, the present invention optimizes the composition and component ratio of the applied reflective paint in forming a reflective layer that reflects the beam emitted from the projector, thereby providing a wide viewing angle and high luminance characteristics. It is an object of the present invention to provide a projector screen with improved luminance, a reflective paint for manufacturing the same, and a screen manufacturing method using the same.

In particular, the present invention improves the viewing angle and luminance characteristics of the screen through the process of increasing the surface roughness of the reflective layer without forming a separate diffusion layer, thereby minimizing the manufacturing process of the screen while minimizing the viewing angle and high luminance characteristics that can be obtained. It is an object of the present invention to provide a projector screen with improved luminance, a reflective paint for manufacturing the same, and a screen manufacturing method using the same.

In addition, the present invention is a projector with improved viewing angle and luminance capable of providing a screen optimized for the use environment by having different color and color temperature characteristics depending on whether aluminum particles constituting the reflective layer are coated with carbon black. It is an object of the present invention to provide a screen for use, a reflective paint for manufacturing the same, and a screen manufacturing method using the same.

In order to achieve the above object, a projector screen having an improved viewing angle and luminance according to the present invention includes a base layer formed of a synthetic resin material; and a reflective layer formed by spraying a paint containing aluminum powder on one side of the base layer and modified to increase surface roughness.

In addition, the surface roughness of the reflective layer may have an arithmetic mean deviation of the profile (RA) of 2 μm to 4 μm.

In addition, the reflective layer may include 2 wt % to 4 wt % of a black colorant.

In addition, the luminance of the reflective layer is 190Lv to 200Lv at a front viewing angle, 150Lv to 160Lv at a viewing angle of 10 ° relative to the front, 110Lv to 120Lv at a viewing angle of 20 °, and 78Lv to 88Lv at a viewing angle of 30 ° and 40 It may be 60Lv to 70Lv at a viewing angle of °.

In addition, the reflective layer may include 4 wt% to 8 wt% of a black colorant, and carbon black may be coated on the aluminum powder.

In addition, the luminance of the reflective layer is 120Lv to 125Lv at a front viewing angle, 60Lv to 65Lv at a viewing angle of 10 ° relative to the front, 50Lv to 55Lv at a viewing angle of 20 °, and 35Lv to 40Lv at a viewing angle of 30 ° and 40 It may be 25Lv to 30Lv at a viewing angle of °.

In addition, an adhesive layer laminated on the other side of the substrate layer; and a release paper stacked on the adhesive layer.

In addition, the reflective paint for manufacturing a projector screen having an improved viewing angle and luminance according to the present invention includes 8% to 12% by weight of aluminum powder in an oil-based synthetic resin, and the aluminum powder is composed of different sizes, at least It contains two groups of particles.

In addition, the aluminum powder, a first particle group having a particle size of 6㎛ to 10㎛; and a second particle group having a particle size of 11 μm to 15 μm.

In addition, the matting agent having a particle size of 3 μm to 5 μm may be further included in an amount of 1% to 4% by weight.

In addition, beads of synthetic resin material may be further included in an amount of 1% to 4% by weight.

In addition, 2% to 8% by weight of a colorant may be further included.

In addition, 20% to 30% by weight of a diluent (thinner, thinner) may be further included.

In addition, a screen manufacturing method using a reflective paint for manufacturing a projector screen having an improved viewing angle and luminance according to the present invention includes a base layer preparation step of manufacturing a base layer formed of a synthetic resin material; and forming a reflective layer on one side of the base layer using any one of the reflective paints.

In addition, in the reflective layer forming step, the reflective paint may be applied to a thickness of 3 μm to 5 μm.

In addition, in the reflective layer forming step, based on the injection amount of 70 g to 100 g per minute, horizontal movement of 110 mm is one cycle speed, and 1.4 m / s to 1.8 m / s in the vertical direction once and 1.8 m /s to 2.2m/s can be applied once.

By means of the above solution, the present invention has the advantage of having a wide viewing angle and high luminance characteristics by optimizing the composition and component ratio of the applied reflective paint in forming the reflective layer that reflects the beam emitted from the projector. .

Specifically, the present invention provides an optimal component ratio for the composition of the reflective paint used to form the reflective layer of the screen, such as oil-based synthetic resin, aluminum powder, matting agent, synthetic resin beads, colorant (black), and diluent (thinner). , can have a wide viewing angle and high luminance characteristics.

In addition, the present invention has the effect of obtaining the above-described wide viewing angle and high luminance characteristics by presenting an optimized method of applying the reflective paint.

In particular, the present invention has the advantage of obtaining a wide viewing angle and high luminance characteristics while minimizing the manufacturing process of the screen by improving the viewing angle and luminance characteristics of the screen through a process of increasing the surface roughness of the reflective layer without forming a separate diffusion layer. there is.

Through this, the present invention has the advantage that when used for classes in schools or private institutes, students placed in the center of a classroom or classroom as well as students placed on the side can fully understand the contents of a lecture.

In addition, the present invention has the advantage of providing a screen optimized for a use environment by having different color and color temperature characteristics depending on whether aluminum particles constituting the reflective layer are coated with carbon black.

For example, in forming the reflective layer of the projector screen of the present invention, the content of the black colorant is lowered and the aluminum particles are not coated with carbon black, so the contrast ratio is relatively higher than that of other screens to be described below. A screen with low surface brightness (luminance) can be provided.

As another example, in forming the reflective layer of the projector screen of the present invention, by coating carbon black on aluminum particles while increasing the content of the black colorant, the surface brightness (luminance) is relatively low compared to the screen of the example described above, but the contrast ratio is excellent. and can provide a screen less affected by ambient brightness (interference light).

Therefore, when the user has a projector with good brightness, a screen with a high contrast ratio can be used rather than a screen with a high screen surface brightness because the projector has sufficient brightness.

If the user has a low-brightness projector, a high-brightness screen can be used.

As a result, when the projector and the screen do not match, the user can view an optimized image by replacing the screen without changing a relatively expensive projector.

In addition, the present invention has the advantage of attaching and using the adhesive layer and the release paper on the rear surface of the screen, if necessary.

Therefore, the field of screens for projectors and screens for front projection, as well as the field of screens with wide viewing angles and high luminance, the field of paint used to manufacture the screen, and the field of applying the paint, as well as similar or related fields can improve reliability and competitiveness.

1 is a view showing an embodiment of a screen for a projector having an improved viewing angle and luminance and a method for manufacturing the screen according to the present invention.
FIG. 2 is a table showing the results of measuring the luminance of the screen manufactured by the method of FIG. 1 .
FIG. 3 is a table showing the results of measuring the color and color temperature of the screen manufactured by the method of FIG. 1 .
Figure 4 is a table showing the results of measuring the surface roughness of the screen manufactured by the method of Figure 1.
5 to 14 are diagrams showing measurement graphs for each sample shown in FIG. 4 .

Examples of a projector screen with improved viewing angle and luminance according to the present invention, a reflective paint for manufacturing the same, and a screen manufacturing method using the same can be applied in various ways. Hereinafter, with reference to the accompanying drawings, the most preferred embodiment will be described Let's explain.

1 is a view showing an embodiment of a screen for a projector having an improved viewing angle and luminance and a method for manufacturing the screen according to the present invention.

Referring to FIG. 1, the method of manufacturing a projector screen having an improved viewing angle and luminance includes preparing a substrate layer (S100), forming a reflective layer (S200), forming an adhesive layer (S300), and attaching a release paper (S400). do.

The base layer preparation step (S100) is a process of manufacturing the base layer 100 formed of a synthetic resin material, and mainly PET (Polyethylene terephthalate), PC (Polycarbonate, Acrylic), PVC (Polyvinyl chloride), etc. can be used.

In addition, in manufacturing a screen using the material, the graphic film may be manufactured to have a thickness of 50 μm to 250 μm, and the film for screen solution may be manufactured to have a thickness of 175 μm to 250 μm, and the purpose of use and those skilled in the art It can be manufactured by applying it in various ways according to the needs of

The reflective layer forming step (S200) is a process of forming the reflective layer 200 on one side (top surface in FIG. 1) of the substrate layer 100 by using (spraying) a reflective paint. The main components of the reflective paint are aluminum particles, It can be composed of beads, matting agent, colorant, oil-based PVC resin and thinner.

In addition, in the reflective layer forming step (S200), the coating may be applied by spraying in vertical and horizontal directions while adjusting the spray pattern and spray amount set for the corresponding paint.

For example, when the material of the base layer 100 is PET, the reflective layer forming step (S200) may apply the reflective paint to a thickness of 3 μm to 5 μm.

Looking at this in more detail, in applying the reflective paint in the reflective layer forming step (S200), based on the spray amount of 70g to 100g per minute, 1.4m in the vertical direction with a horizontal movement of 110mm as one cycle speed /s to 1.8 m/s can be applied once and 1.8 m/s to 2.2 m/s once.

In addition, a more detailed look at the reflective paint discussed above is as follows.

The reflective paint for a projector screen of the present invention may include 8% to 12% by weight of aluminum powder in an oil-based synthetic resin, and in particular, the aluminum powder may include at least two groups of particles having different sizes. Here, the oil-based synthetic resin may include PVC.

For example, the aluminum powder may include a first particle group having a particle size of 6 μm to 10 μm and a second particle group having a particle size of 11 μm to 15 μm.

In this way, by mixing the particle groups having two types of sizes, it is possible to distribute the small particles evenly over the entire area while filling the gaps between the large particles.

In addition, the reflective paint for the projector screen may further include a matting agent having a particle size of 3 μm to 5 μm in an amount of 1% to 4% by weight.

In addition, the reflective paint for the projector screen may further include beads of a synthetic resin material in an amount of 1% to 4% by weight.

At this time, the beads are for strengthening the surface scratches of the reflective layer (increasing surface roughness) and diffusing light. As discussed above, even if a separate diffusion layer is not configured, the reflective layer simultaneously serves as a diffusion layer by the beads, so that the entire Productivity can be improved by shortening the process. Here, the bead may be composed of a polypropylene system.

In the present invention, the surface roughness (surface roughness) of the reflective layer by the beads may have an arithmetic mean deviation of the profile (RA) value of 2 μm to 4 μm, as shown in FIG. .

In addition, the reflective paint for the projector screen may further include 2% to 8% by weight of a colorant and 20% to 30% by weight of a thinner (thinner).

Accordingly, the oil-based synthetic resin may be blended in an amount of 42% to 68% by weight based on the total weight of the reflective paint.

Through this process, when the reflective layer 100 is formed on one side of the base layer 100, an adhesive layer is laminated on the other side of the base layer 100 (S300), and the release paper is applied to the adhesive layer 300. By laminating (attaching) (300) (S400), a projector screen having an improved viewing angle and luminance can be manufactured according to the present invention.

Looking at the projector screen manufactured in this way in more detail, as shown in FIG. The reflective layer 200 formed by spraying paint and modified to increase surface roughness may be formed.

At this time, when it is desired to further improve the surface brightness of the projector screen, the reflective layer 200 may include 2% to 4% by weight of a black colorant.

In other words, in the reflective layer forming step (S200) of the manufacturing method of the projector screen described above, the reflective paint for the projector screen may be made by including 2% to 4% by weight of the black colorant.

In this way, the reflective layer 200 of the projector screen (PET silver) with relatively improved surface brightness (luminance) was measured in a dark room using a 'Konica Minota CS-150' color luminance meter, as shown in FIG. As shown, it is 190Lv to 200Lv at a front viewing angle, 150Lv to 160Lv at a viewing angle of 10° from the front, 110Lv to 120Lv at a viewing angle of 20°, 78Lv to 88Lv at a viewing angle of 30°, and 60Lv at a viewing angle of 40°. to 70Lv. At this time, the distance between the projector and the sample was 1900 mm, and the distance and height between the measuring equipment and the sample were 2460 mm and 1335 mm, respectively.

For a typical screen with similar characteristics, it is 192.58Lv at a front viewing angle, 115.66Lv at a viewing angle of 10° from the front, 84.12Lv at a viewing angle of 20°, 52.48Lv at a viewing angle of 30°, and 52.48Lv at a viewing angle of 40°. It is measured at 36.56Lv at the viewing angle.

In comparison, it can be seen that the screen of the present invention has similar luminance characteristics at the front viewing angle, but significantly improved luminance characteristics as it moves to the side.

If it is desired to further improve the contrast ratio of the corresponding projector screen, the reflective layer 200 may include 4% to 8% by weight of a black colorant, and in addition, aluminum powder may be coated with carbon black. .

In other words, in the reflective layer forming step (S200) of the manufacturing method of the projector screen described above, aluminum powder is coated with carbon black, and at the same time, 4% to 8% by weight of the black colorant is included to form a reflective paint for the projector screen. can make

In this way, the reflection layer 200 of the projector screen (PET black) with a relatively improved contrast ratio was measured in a dark room using a 'Konica Minota CS-150' color luminance meter, and as shown in FIG. 2, the front viewing angle 120Lv to 125Lv, 60Lv to 65Lv at a viewing angle of 10 ° based on the front, 50Lv to 55Lv at a viewing angle of 20 °, 35Lv to 40Lv at a viewing angle of 30 °, and 25Lv to 30Lv at a viewing angle of 40 °. .

For a typical screen with similar characteristics, it is 58.33Lv at a front viewing angle, 48.04Lv at a viewing angle of 10° from the front, 37.94Lv at a viewing angle of 20°, 27.38Lv at a viewing angle of 30°, and 27.38Lv at a viewing angle of 40°. It is measured at 23.91Lv at the viewing angle.

In comparison, it can be seen that the screen of the present invention has greatly improved luminance characteristics at all viewing angles.

In addition, the color and color temperature for each screen are as shown in FIG. 3, where Tcp is the correlated color temperature, duv is the Delta UV (color difference from black body locus), and Pe is the excitation purity ), λd refers to the dominant wavelength.

In addition, the surface roughness of each screen is as shown in FIG. 4, and the measurement graphs for each sample are as shown in FIGS. 4 to 14. At this time, the surface roughness of the sample was measured using 'SE 3500 (contact type measuring equipment)'.

As described above with reference to FIG. 4 , the surface roughness (surface roughness) may be formed to have an arithmetic mean roughness (RA) of 2 μm to 4 μm.

On the other hand, in the case of a general screen, it has a surface roughness value of 0.93㎛ on average. Compared to this, it can be seen that the surface roughness of the projector screen of the present invention is high, and accordingly, the reflective layer (200 ), more active light diffusion can be achieved, and it can be seen that the luminance also increases.

As a result, when the reflective layer 200 is formed according to the mixing ratio of the reflective paints described above, the present invention has surface roughness (surface roughness) characteristics as shown in FIG. In addition, it can be seen that the color and color temperature characteristics shown in FIG. 3 are obtained.

These luminance characteristics, color and color temperature characteristics for each viewing angle can be said to be optimal conditions for having a wide viewing angle and high luminance characteristics, which are the objects of the present invention.

In the above, a projector screen having an improved viewing angle and luminance according to the present invention, a reflective paint for manufacturing the same, and a screen manufacturing method using the same have been described. It will be understood that the technical configuration of the present invention can be implemented in other specific forms without changing the technical spirit or essential features of the present invention by those skilled in the art to which the present invention belongs.

Therefore, the embodiments described above are illustrative in all respects and should be understood as non-limiting ones.

100: base layer
200: reflective layer
300: adhesive layer
400: release paper

Claims (16)

A base layer formed of a synthetic resin material; and
A projector screen with improved viewing angle and luminance comprising: a reflective layer formed by spraying a paint containing aluminum powder on one side of the substrate layer and modified to increase surface roughness.
According to claim 1,
The surface roughness of the reflective layer is
Projector screen with improved viewing angle and luminance, characterized in that the arithmetic mean deviation of the profile (RA) is 2 μm to 4 μm.
According to claim 1,
The reflective layer,
Projector screen with improved viewing angle and luminance, characterized in that it contains a black colorant of 2% to 4% by weight.
According to claim 3,
The luminance of the reflective layer is
190Lv to 200Lv at the front viewing angle,
150Lv to 160Lv at a viewing angle of 10 ° based on the front, 110Lv to 120Lv at a viewing angle of 20 °, 78Lv to 88Lv at a viewing angle of 30 °, and 60Lv to 70Lv at a viewing angle of 40 °. Enhanced projector screen.
According to claim 1,
The reflective layer,
4% to 8% by weight of a black colorant,
Projector screen with improved viewing angle and luminance, characterized in that the aluminum powder is coated with carbon black.
According to claim 5,
The luminance of the reflective layer is
120Lv to 125Lv at the front viewing angle,
60Lv to 65Lv at a viewing angle of 10 ° based on the front, 50Lv to 55Lv at a viewing angle of 20 °, 35Lv to 40Lv at a viewing angle of 30 °, and 25Lv to 30Lv at a viewing angle of 40 °. Enhanced projector screen.
According to any one of claims 1 to 6,
an adhesive layer laminated on the other side of the substrate layer; and
A projector screen with improved viewing angle and luminance further comprising a release paper laminated on the adhesive layer.
Contains 8% to 12% by weight of aluminum powder in an oil-based synthetic resin,
The aluminum powder,
A reflective paint for a projector screen with improved viewing angle and luminance, characterized in that it comprises at least two particle groups composed of different sizes.
According to claim 8,
The aluminum powder,
A first particle group having a particle size of 6 μm to 10 μm; and
A reflective paint for a projector screen having an improved viewing angle and luminance, comprising: a second particle group having a particle size of 11 μm to 15 μm.
According to claim 8,
Reflective paint for a projector screen with improved viewing angle and luminance, characterized in that the matting agent having a particle size of 3㎛ to 5㎛ further contains 1% to 4% by weight.
According to claim 8,
Reflective paint for a projector screen with improved viewing angle and luminance, characterized in that beads of synthetic resin material are further included in 1% to 4% by weight.
According to claim 8,
Reflective paint for a projector screen with improved viewing angle and luminance, characterized in that it further contains a colorant of 2% to 8% by weight.
According to claim 8,
Reflective paint for a projector screen with improved viewing angle and luminance, characterized in that it further contains 20% by weight to 30% by weight of a thinner (Thinner, thinner).
A base layer preparation step of manufacturing a base layer formed of a synthetic resin material; and
A method of manufacturing a projector screen having an improved viewing angle and luminance, comprising: forming a reflective layer on one side of the substrate layer using the reflective paint of any one of claims 8 to 13.
According to claim 14,
The reflective layer forming step,
A method of manufacturing a projector screen having an improved viewing angle and luminance, characterized in that the reflective paint is applied to a thickness of 3 μm to 5 μm.
According to claim 14,
The reflective layer forming step,
Based on the injection amount of 70g to 100g per minute, horizontal movement of 110mm is one cycle speed, vertical direction 1.4m/s to 1.8m/s once and 1.8m/s to 2.2m/s 1 A method of manufacturing a projector screen with improved viewing angle and luminance, characterized in that each coating is applied.

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