JPH02257018A - See-through plate provided with anti-glare function - Google Patents

Abstract

PURPOSE:To easily form a light absorbing film and to prevent a rising film surface from shining and images from being superposed by forming the light absorbing film on the surface of a teeth-shaped projecting part and removing a part of the light absorbing film on a see-through surface with a laser beam. CONSTITUTION:The back surface side of a see-through plate 1 is formed to be a flat surface 2. On the surface side thereof, the fine teeth-shaped projecting parts 5 consisting of the inclined see-through surface 3 and the rising wall surface 4 are formed in parallel and the light absorbing film 6 is applied to the rising wall surface 4. In the case of forming the light absorbing film 6, the light absorbing film 6 is applied to the entire surface of the see-through plate 1 and the film 6 on the see-through surface 3 is removed by being irradiated with the laser beam 8. Therefore, the working of the light absorbing film 6 is extremely facilitated. The light advancing toward the rising wall surface 4 out of the light beam made incident in the medium of the see-through plate 1 is absorbed in the absorbing film 6 of the wall surface 4, so that the wall surface 4 is kept from shining and also the images are prevented from being viewed in the superposed state.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a viewing plate for preventing surface reflection of a display device, and in particular, the present invention relates to a viewing plate for preventing surface reflection of a display device, and in particular, in the case of external light irradiating the viewing plate surface, light rays reflected on the viewing plate surface. The present invention relates to a see-through plate having an anti-glare function that reflects light outside the field of view in a direction other than the viewing direction.

[Conventional technology]

Generally, the display surface of various display devices is covered with a transparent plate, but when a flat transparent plate such as a glass substrate or a transparent synthetic resin substrate is used as the transparent plate, the surface of the transparent plate There is a problem in that the external light that is irradiated is directly reflected in the direction of the line of sight, causing the surface of the see-through plate to shine and reducing visibility. In order to solve this problem, a transparent plate having an anti-glare function has been proposed. For example, a flat surface is formed on the back side of the cross-sectional shape, and serrated protrusions are formed in parallel lines on the front side, consisting of an inclined surface and a rising wall surface extending perpendicularly to the flat surface. Showa 56-13370
It is known from Publication No. 1. This prevents the surface of the see-through plate from shining by allowing a portion of external light to be reflected on the inclined surfaces of the serrated projections and guided out of the field of view in a direction other than the line of sight.

[Problem to be solved by the invention]

In the above-mentioned conventional technology, a part of the external light incident on the inside of the transparent plate is reflected by the rising wall surface of the serrated protrusion and enters the field of view in the viewing direction, causing the rising wall surface to shine or the light behind the transparent plate. There is a problem in that a portion of internal light from the display device side rises within the medium of the see-through plate and is reflected on the wall surface and enters the field of view, resulting in multiple overlapping images, resulting in reduced visibility. In order to solve this problem, it is possible to form a light absorption film on the rising wall surface to suppress the reflection of light rays, but since the width of the rising wall surface is usually very narrow, it is difficult to form a light absorption film on the rising wall surface.

Therefore, the inventor proposed a structure in which a light shielding portion is formed in at least a part of the area where the reflected light in the see-through plate medium, which is reflected on the internal surface of the rising wall surface on the see-through surface, is guided from the see-through surface into the field of view, as disclosed in Japanese Patent Application Laid-Open No. 180755/1983. It was proposed as a publication, and in addition, a fine unevenness part is formed in at least a part of the area where the light reflected from the rising wall surface of the serrated protrusion or the rising wall surface on the transparent surface is guided into the field of view to diffuse the light beam. This is proposed in Japanese Patent Application Laid-Open No. 62-201401. However, in the former case, the light-shielding portion is easily visible, and in the latter case, it is expected that manufacturing the mold will be troublesome when obtaining the fine uneven portion by molding.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a see-through plate having an anti-glare function in which a light-absorbing film can be easily formed on the sawtooth-like protrusions.

[Failure to solve the problem]

The present invention is characterized in that a flat surface is formed on the back side, and sawtooth-like protrusions are formed in parallel lines on the front side, consisting of an inclined transparent surface and a vertical wall surface, in which the sawtooth-like protrusions This is a see-through plate having an anti-glare function, in which a light-absorbing film is formed on the surface of the see-through plate, and at least a part of the light-absorbing film formed on the see-through surface is removed by laser processing.

[Effect]

With the above configuration, among the light rays incident on the medium of the transparent plate, the light rays directed toward the rising wall surface are absorbed by at least the light absorption film formed on the rising wall surface, and the rising wall surface shines.
This prevents images from appearing to overlap.

〔Example〕

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show a first embodiment of the present invention,
For example, a colorless transparent or colored transparent transparent plate 1 disposed on the entire surface side of a display device (not shown) such as a CRT is formed into a flat surface 2 on the back side of the transparent plate 1, that is, on the display surface side of the display device. In addition, a transparent surface 3 inclined at an angle set with respect to the flat surface 2 on the front side of the transparent plate 1 and the flat surface 2
Fine sawtooth-like protrusions 5 are formed in parallel lines with rising wall surfaces 4 formed in a direction substantially perpendicular to the surface.

Further, a light absorption film 6 is formed on the entire surface of the rising wall surface 4.

The light absorption film 6 on the rising wall surface 4 is formed as follows. In other words, as shown in Fig. 2, a paint with a high light absorption rate, such as a black color, is sprayed onto a uniform surface of, for example, 0.
A light absorbing film 6 is formed on the entire surface side of the transparent plate 1 by coating with a thickness of 2 to 0.3 mm, and in this way each sawtooth protrusion 5 is
A light-absorbing film 6 is uniformly formed on the entire inclined transparent surface 3 and rising wall surface 4.

Thereafter, as shown in FIG. 3, the light-absorbing film 6 on the transparent surface 3 is removed by laser processing, thereby allowing the transparent surface 3 to transmit light. In this case, the type of laser processing can be freely selected. For example, by irradiating a laser beam with a YAG laser beam from a direction inclined at an angle θ, for example, 3 to 5 degrees from the rising direction of the rising wall surface 4, the light absorption film on the rising wall surface 4 can be formed. 6 from being irradiated with the laser.

In this way, in the above embodiment, since the light absorbing film 6 is formed on the rising wall surface 4 of the serrated protrusion 5, the transparent plate 1
Even if some of the external light that has entered the interior or the internal light from the display device side behind the transparent plate 1 rises within the medium of the transparent plate 1 and is reflected on the wall surface 4, the light ray is absorbed by the light absorption film 6. The amount of reflected light becomes extremely small, and it is possible to prevent the rising wall surface 4 from shining or the images from appearing to overlap. Furthermore, the light absorption film 6 formed on the rising wall surface 4 is first formed on the entire surface side of the transparent plate 1, and then the light absorption film 6 on the surface of the transparent surface 3 is removed by laser processing. The light 6 is hardly visible on the entire rising wall surface 4, and complicated machining of the mold is also eliminated.

4 and 5 show a second embodiment of the present invention. In this example, as shown in FIG. 4, a base coat 7 of transparent ink is formed on the entire surface side of the see-through plate 1. A light absorption film 6 similar to that in the first embodiment is formed on the surface, and then the light absorption film 6 on the surface of the transparent surface 3 is removed by laser processing as shown in FIG. A base coat 7 is formed on each of the absorption films 6 on the transparent surface 3, so that external light or internal light incident on the inside of the transparent plate 1 rises and reaches the wall surface 4.
Since the amount of reflection is very small, it is possible to prevent the rising wall surface 4 from shining or the images from appearing to overlap. In addition, the base coat 7 improves the adhesion between the transparent plate 1 and the light absorption film 6, and the base coat 7
If it is formed as a hard film, it is possible to prevent the sharp parts of the sawtooth protrusions 5 from chipping or the surface parts from being scratched, and by forming the base coat 7 with an ink with low light reflectance, it is possible to prevent the rising wall surface from being damaged. The amount of reflected light in step 4 can be further reduced.

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made within the scope of the gist of the present invention. For example, the transparent plate is preferably a transparent synthetic resin sheet material or a transparent glass substrate, and the transparent plate may be attached to a transparent base material as a means for applying the sheet material. Further, the top of the serrated protrusion may be formed into a rounded shape or the like. Further, the method for forming the light absorbing film or base coat may be appropriately selected from coating, vapor deposition, ultraviolet curing, or the like. In addition, the type of laser processing can be selected appropriately.
The laser beam may be irradiated all at once within a predetermined area, or may be sequentially scanned within the area. In addition, we have explained the case where the light absorption film formed on the transparent surface 3 is removed, but in this case, as shown in FIG.
The light absorbing film 6 may be left slightly on the side of the rising wall surface 4 of the light absorbing film 6.

〔Effect of the invention〕

In the present invention, a flat surface is formed on the back side, and serrated protrusions consisting of a see-through surface and a rising wall surface are formed in parallel lines on the front side. At least a portion of the light-absorbing film formed on the transparent surface is removed by laser processing, so the light-absorbing film can be easily formed on the sawtooth-like protrusions, and the rising wall surface is illuminated. It is possible to provide a see-through plate having an anti-glare function that can prevent scratches from appearing overlapping each other.

[Brief explanation of drawings]

1 to 3 show a first embodiment of the present invention, FIG. 1 is a sectional view, FIGS. 2 and 3 are sectional views showing the process of forming a light absorption film, and FIGS. FIG. 5 is a sectional view showing a second embodiment of the invention, and FIG. 6 is a sectional view showing another embodiment of the invention. 1-Transparent plate 2=-Flat surface Transparent surface Raised wall surface Part of tooth-shaped protrusion Light absorption film

Claims (1)

[Claims] (1) A see-through plate is formed from a colorless transparent material or a colored transparent material, and a flat surface is formed on the back side of the see-through plate, and a see-through surface inclined at an angle set with respect to the flat surface on the front side, and the flat surface are formed on the front side. In a see-through plate having an anti-glare function in which protrusions with a sawtooth cross-section formed in parallel lines are formed with a rising wall surface extending in a direction perpendicular to the surface, a light absorption film is formed on the surface of the sawtooth-like protrusions. 1. A see-through plate having an anti-glare function, characterized in that at least a part of the light-absorbing film formed on the see-through surface is removed by laser processing.