TWI661236B - Mask optics for reducing glare - Google Patents

Abstract

A reticle optical element includes an optical element, wherein the optical element has a light incident surface and a light emitting surface disposed opposite to the light incident surface, and the light emitting surface is provided with a plurality of micrometer grid structures, and these The micro-grid structure is a structure in which a plurality of two inclined planes sandwich a plane; thereby, the inclined planes refract horizontally polarized light emitted by a light source, and circulate in the micro-grid structure, and The vertically polarized light emitted by the light source is integrated, and the optical element is emitted together to reduce the glare caused by the poor horizontally polarized light, which can further increase the lumen.

Description

Mask optics for reducing glare

The present invention relates to an optical element for reducing glare, and more particularly to an optical element capable of reducing glare caused by a light source and increasing lumen.

Glare is caused by improper brightness distribution, too large changes in brightness, or extreme contrasts in space and time, which cause discomfort or reduce the ability to observe important objects, or produce both of these phenomena at the same time. The factors include the brightness, position, appearance size and number of light sources. The light emitted by a general light source is perpendicular to the light source, and the horizontally polarized light is the most common glare generated by general lamps.

A commercially available filter on the light source is used to filter horizontally polarized light, so that vertical polarized light can be emitted, or a layer of light blocking powder and other coatings can be applied to the lampshade to prevent glare. Can reduce glare, but at the same time greatly reduce the brightness of the original light.

Therefore, the inventor of the present invention has recently disclosed the Republic of China Certificate No. I608192, which discloses a mask optical element capable of reducing glare, which is used to improve the shortcomings of the conventional technology. The invention of the "mask optical element for reducing glare" in this case is a further improvement on the previous case. In addition to its original function, it also increases the ability to reduce glare and improve lumen.

The main object of the present invention is to provide a mask optical element for reducing glare, which can reduce the glare emitted by a light source and increase the lumen emitted at the same time.

In order to achieve the above purpose, the technical means is that the mask optical element has a light incident surface and a light emitting surface opposite to the light incident surface, wherein the light emitting surface is provided with a plurality of micrometer grid structures, and the micrometers The grid structure is formed by a plurality of two inclined planes sandwiching a plane. The inclined planes refract the horizontally polarized light emitted by a light source, and circulate in the micro-grid structure. The emitted vertically polarized light is integrated, and the optical element is also emitted. The horizontally polarized light is refracted to reduce the bad horizontally polarized light. The cycle of the horizontally polarized light is combined with the vertically polarized light of the light source to emit the optical element. Absorbed by the reticle, which can further increase the lumen.

10‧‧‧ Optics

100‧‧‧ Light surface

101‧‧‧light surface

11‧‧‧ Grille structure

111‧‧‧ bevel

112‧‧‧plane

113‧‧‧V groove opening

114‧‧‧ Depression

20‧‧‧ light source

21‧‧‧ vertically polarized light

22‧‧‧ horizontally polarized light

30‧‧‧light guide

θ ‧‧‧ angle

H1‧‧‧Slope height

W1‧‧‧plane width

W2‧‧‧Width of grille structure

FIG. 1 is a schematic cross-sectional structure of the present invention.

FIG. 2 is a schematic diagram of a use state of the present invention.

FIG. 3 is a schematic diagram of circulating light of the present invention.

FIG. 4 is a schematic diagram of another use state of the present invention.

FIG. 5 is a plan view of the structure of the present invention.

FIG. 6 is a top view of another structure of the present invention.

FIG. 7 is a sectional view of another embodiment of the present invention.

In order to facilitate your review committee to have a better understanding and understanding of the technical means and operation process of the present invention, examples are given in conjunction with the drawings, which are described in detail below.

The present invention relates to a mask optical element for reducing glare. Please refer to FIG. 1. A mask optical element 10 according to the present invention has a smooth light incident surface 100 and a smooth surface opposite to the light incident surface 100. A light emitting surface 101, and the mask optical element 10 is provided with a grid structure 11 of a plurality of micrometers. Each of the grid structures 11 has two opposite inclined surfaces 111 at the light emitting surface 101, and the inclined surfaces 111 have A plane 112, which can be an acute angle or a plane. Because it is technically difficult to reach a complete acute angle, the range of the radius R outside the acute angle is 0.01 to 0.7 mm, and a V is provided between each of the grid structures 11. The trench opening 113; further, the grid structure 11 has a recessed portion 114 on the light incident surface 100, and a depth H2 of the recessed portion 114 and a horizontal plane are 0.02 mm to 0.08 mm.

Please refer to FIG. 1 again, the height of the inclined surfaces 111 is H1, the width of the plane 112 is W1, the width of each grid structure 11 is W2, the width of the V-groove opening 113 is V, and each The angle between the grid structures 11 is θ ; wherein the length of W1 ranges from 2% to 79% of V, the length of W1 ranges from 2% to 50% of W2, and the height of H1 ranges from 30% to 75 of W2. %, The height range of H1 is above W1 ≧ 100%, θ is 70 ° to 110 °, and the optimal length of W1 is 0.01mm to 0.14mm, the optimal length of W2 is 0.02mm to 2.9mm, and the optimal length of H1 The length is 0.02mm to 0.7mm; and the reticle optical element 10 of the present invention is a transparent plastic material, which is formed by extrusion or injection, and has a penetrating force of more than 60%. The transparent plastic material can be PS, PC, PP, MS, acrylic, etc. In addition, the light-incident surface 100 and the light-emitting surface 101 can also be AG atomized surfaces that have undergone AG (Anti Glare) atomization treatment, so as to cover the rear of the optical element 10 such as a light bulb, Light source such as tube or LED lamp.

Please refer to FIG. 2, a light source 20 is disposed on one side of the light incident surface 100. When the light source 20 is incident from the light incident surface 100, its light transmittance is 30% to 55%, and When the light source 20 is incident from the light emitting surface 101, its transmittance is 80% to 100%, wherein the light source 20 will generate a vertically polarized light 21 and a horizontally polarized light 22 into the mask optical element 10, respectively. In the embodiment, the vertically polarized light 21 enters from the light incident surface 100 and then exits straight from the plane 112 of the light emitting surface 101.

Please refer to FIG. 3, when the horizontally polarized light 22 enters the mask optical element 10 from the light incident surface 100, it will first contact the inclined surfaces 111, generate a first refraction, and strike the opposite inclined surface 111. Furthermore, the horizontally polarized light 22 is caused to undergo a second refraction. The second refraction is directed to the horizontally polarized light 22 toward the light incident surface 100. Due to the angular relationship of the inclined surface 111, the horizontally polarized light 22 is not directed straight toward the incident light. Instead, the light plane 100 is incident obliquely in the direction of the vertically polarized light 21, so that the horizontally polarized light 22 that has been refracted multiple times is combined with the vertically polarized light 21 and then emitted from the plane 112 together.

Please refer to FIGS. 2 and 3 again. According to the present invention, the horizontally polarized light 22 is refracted by the inclined surfaces 111, so that the glare formed by the horizontally polarized light 22 exiting the mask optical element 10 is reduced, because the horizontal The polarized light 22 passes through multiple refractions and is emitted in combination with the vertically polarized light 21 to further increase the emitted lumens. The mask optical element of the present invention effectively utilizes the refraction cycle of light in the grid structure 11 to reduce glare. Because the present invention does not reduce the glare by absorbing the horizontally polarized light 22, the lumen emitted by the light source 20 will not be reduced, but the transmission refraction cycle will increase the lumen by more than 10%.

Please refer to FIG. 4, the light source 20 can be incident from the side of the optical element 10 and guided through the light guide plate 30 of a transparent plastic material into the optical element of the mask; The transparent plastic material of the light guide plate 30 may be PS, PC, PP, acrylic, or the like.

Please refer to FIGS. 5 and 6, the shape of the grid structures 11 is not limited by the present invention, and may be polygonal or conical.

Please refer to FIG. 7, the light incident surface 100 of the mask optical element 10 may be a flat surface without the recess 114 (see FIG. 1).

However, the above are only the preferred embodiments of the present invention, and the scope of implementation of the present invention cannot be limited by this; therefore, any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the invention specification of the present invention , All should still fall within the scope of the invention patent.

Claims (4)

A mask optical element for reducing glare is composed of a grid structure of a plurality of micrometers, and has a smooth light incident surface and a smooth light emitting surface opposite to the light incident surface. The grid structure is formed on the light emitting surface. The plane has two opposite inclined planes, and a plane is arranged between the inclined planes, which is characterized in that there is a V-groove opening between the grid structures, and the width (W1) of the plane ranges from 2% to 79 of the V-groove opening. %, And the width of the plane (W1) ranges from 2% to 50% of the width of the grid structure (W2), and the height of the slope (H1) ranges from 30% to 75% of the width of the grid structure (W2) And the height range (H1) of the inclined plane is the width (W1) of the plane ≧ 100% or more, and the angle of the V-groove opening is 70 to 110 degrees. As described in item 1 of the scope of the patent application, a mask optical element for reducing glare, wherein the plane may be an acute angle with a radius of the circumscribed circle ranging from 0.01 to 0.7 mm. As described in item 1 of the scope of the patent application, for a reticle-reducing optical element, the shape outside the grid structure may be selected from any of a polygonal shape and a conical shape. According to the mask optical element for reducing glare as described in item 1 of the scope of patent application, a light source entering the grid structures will generate a vertically polarized light and a horizontally polarized light, respectively. The oblique surfaces produce multiple refractions, which are then integrated with the vertically polarized light and emitted.