TWI626477B - An optical element with trench array and the light source device of the same - Google Patents

Abstract

The invention relates to an optical component having a groove array, comprising: a light transmitting body, the light transmitting body has a light incident surface and a light emitting surface; and a plurality of groove arrays are disposed on the light emitting surface, each Each of the trench arrays is composed of a plurality of trench microstructures that are equally spaced and parallel to each other; each of the trench arrays has a plurality of trench microstructures interlaced with each other; each trench The plurality of trench microstructures of the array are trenches recessed from the light exiting surface toward the light incident surface, and a spacing between each two adjacent trench microstructures is greater than that of each of the trench microstructures The width of the opening such that the light exiting surface between the plurality of trench microstructures forms a plurality of planar patches.

Description

Optical element with groove array and light source device thereof

The present invention relates to an optical element having a groove array and a light source device thereof, and more particularly to an optical element having a groove array and a light source device thereof, which can be used to reduce the glare value of an illumination device or a planar device.

In recent years, optical films for reducing glare values have been widely used in lighting devices, display devices, and window glass, mirrors, etc. to reduce glare values, to solve glare caused by glare and to reduce the contrast of display images. And other issues with image quality.

Optical elements currently available on the market for having an array of trenches are generally configured to have a roughened surface on the surface of the optical film, or a raised microstructure distributed on the surface of the optical film, which is reduced by the roughened surface or microstructure. The glare value of the light of the film.

However, the structure of the existing optical element having the groove array mostly adopts a microstructure or a roughened surface of the protrusion, and therefore the microstructure or the roughened surface must be protected from damage in use to avoid affecting the performance of the optical film. On the other hand, it is still designed to reduce the light transmittance of the optical film, which affects the image quality.

Therefore, how to improve the performance and reliability of optical components used to reduce the glare value by improving the structural design has become one of the important issues to be solved by this business.

The object of the present invention is to provide an efficacies that can effectively reduce glare and enhance optical An optical element having a groove array and a light source device thereof.

An embodiment of the present invention provides an optical component having an array of trenches, including: a light transmissive body having a light incident surface and a light exit surface disposed opposite to the light incident surface; a plurality of trench arrays disposed on the light emitting surface of the light transmissive body, each of the trench arrays being respectively composed of a plurality of trench microstructures that are equally spaced and parallel to each other; Each of the plurality of trench microstructures of each of the trench arrays has a trench axis passing through a center of each of the trench microstructures, and the plurality of trenches of each of the trench arrays A plurality of said groove axes of the structure are parallel to each other, and a plurality of said groove axes of said plurality of said groove microstructures in said array of grooves and said plurality of said array of grooves A plurality of the groove axes of the trench microstructure are interlaced with each other; wherein a plurality of the groove microstructures of each of the groove arrays are concave from the light exiting surface toward the light incident surface Inscribed linear grooves, each of said groove microstructures having a location An opening on one side of the light exiting surface, and a bottom angle with respect to one side of the opening, and two groove slopes connected to both side edges of the opening from both sides of the bottom corner; and each two adjacent The spacing between the trench microstructures is greater than the width of the opening of each of the trench microstructures such that the light exiting surface between the plurality of trench microstructures forms a plurality of planar blocks And each of the trench slopes of each of the trench microstructures is symmetrical to each other, and an angle between the two trench slopes is in a range between 80 degrees and 100 degrees; and each of the trenches The width of the opening of the groove is in the range of 80% to 200% of the width of each of the planar blocks.

In a preferred embodiment of the present invention, the number of the array of the grooves on the light-emitting surface of the light-transmitting body is two, and among the two arrays of grooves, any one of the arrays of the grooves The angle between the groove axis of the trench microstructure and the groove axis of the groove microstructure of the other of the groove array is 90 degrees.

In a preferred embodiment of the present invention, the number of the array of trenches disposed on the light-emitting surface of the light-transmitting body is three, and the three of the three trench arrays are a plurality of said groove axes of the trench microstructure and the other two of said grooves A plurality of said groove axes of said plurality of said groove microstructures of said array of grooves coexist at a plurality of axis intersections, and at each of said axis intersection points, there are respectively one of said three arrays of said grooves The groove axes of the groove microstructures coexist at the intersection of the axes, and among the three groove axes intersecting at the intersection of the axes, two adjacent groove axes Symmetrical to the normal to the other of the groove axes.

In a preferred embodiment of the invention, wherein the angle between each of the two adjacent groove axes is 60 degrees among the three groove axes intersecting each of the axis intersection positions.

In a preferred embodiment of the present invention, the angle of the angle between the two groove slopes of each of the groove microstructures is 90 degrees.

In a preferred embodiment of the invention, the ratio of the width of the opening of each of the grooves to the width of the planar block is 1:1.

In a preferred embodiment of the invention, the width of the corner portion of each of the groove microstructures at the bottom corner is less than 10% of the width of each of the openings.

The embodiment of the present invention further provides an illumination device, including: an optical component, the optical component includes a light transmissive body, and the light transmissive body has a light incident surface and a light emitting opposite to the light incident surface a plurality of trench arrays, wherein the plurality of trench arrays are disposed on the light emitting surface of the light transmissive body, and each of the trench arrays is respectively formed by a plurality of trenches at equal intervals and parallel to each other a plurality of said trench microstructures of each of said trench arrays each having a central groove axis through each of said trench microstructures, said plurality of said plurality of said trench arrays A plurality of the groove axes of the trench microstructure are parallel to each other, and a plurality of the groove axes of the plurality of trench microstructures in each of the trench arrays and other of the trench arrays A plurality of the groove axes of the plurality of trench microstructures are interlaced with each other; wherein a plurality of the trench microstructures of each of the trench arrays are from the light exiting surface toward the light incident surface a linear groove having a concave direction, each of the groove microstructures having The surface located on one side of the opening, and a bottom side relative to the opening of An angle, and two groove bevels connected to both side edges of the opening from both sides of the bottom corner; and a spacing between each two adjacent groove microstructures is greater than each of the grooves a width of the opening of the structure such that the light exiting surface between the plurality of trench microstructures forms a plurality of planar blocks; and each of the trench slopes of each of the trench microstructures is symmetrical to each other And an angle between the two groove slopes is between 80 degrees and 100 degrees; and the width of the opening of each of the grooves is 80% of the width of each of the plane blocks And a light-emitting module, the light-emitting module is disposed on a side of the light-incident surface of the light-transmitting body, the light-emitting module has a plurality of light-emitting elements, and the plurality of light-emitting elements The generated light penetrates from the light transmitting surface to the light transmitting body, and then penetrates through the light emitting surface of the light transmitting body.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

1‧‧‧Optical components

10‧‧‧Lighting body

11‧‧‧Into the glossy surface

12‧‧‧Glossy

20‧‧‧ trench array

20a‧‧‧First groove array

20b‧‧‧Second trench array

20c‧‧‧ third trench array

21‧‧‧ trench microstructure

211‧‧‧ openings

212‧‧‧ bottom corner

213‧‧‧ Groove bevel

214‧‧‧Ditch axis

214a‧‧‧First groove axis

214b‧‧‧second groove axis

214c‧‧‧ third groove axis

215‧‧‧ axis intersection

216‧‧‧ normal

22‧‧‧ Plane block

221‧‧‧ normal

23‧‧‧Triangular unit

30‧‧‧Lighting module

31‧‧‧Lighting elements

40‧‧‧Diffuser

50‧‧‧Transparent media

51‧‧‧Second glazing

L‧‧‧ spacing

D‧‧‧ opening width

W‧‧‧ plane width

‧‧‧‧ angle

L1‧‧‧ Beam

L2‧‧‧ beam

B1‧‧‧First forward illumination beam

B2‧‧‧second positive illumination beam

D1‧‧‧ bottom angle width

H‧‧‧height

1 is a schematic side cross-sectional view of an optical element having a trench array of the present invention.

2 is a partially enlarged schematic view showing an optical element having a groove array according to the present invention.

2A is a partially enlarged schematic view showing a bottom corner portion of a trench microstructure of the present invention.

3 is a schematic plan view showing a specific embodiment of a first type of groove array arrangement of an optical element having a groove array according to the present invention.

4 is a schematic plan view showing a specific embodiment of a second trench array arrangement of optical elements having a trench array according to the present invention.

FIG. 5 is a schematic plan view showing another embodiment of a groove array arrangement of an optical element having a groove array according to an embodiment of the present invention.

Fig. 5A is a partially enlarged schematic view showing the optical element of the embodiment shown in Fig. 5.

Fig. 6 is a schematic view showing the construction of a light source device fabricated by using the optical element having the groove array of the present invention.

Fig. 6A is a partially enlarged schematic view showing the light source device of the embodiment shown in Fig. 6.

Fig. 7 is a structural schematic view showing another embodiment of a light source device fabricated by using the optical element having the groove array of the present invention.

Fig. 8 is a structural schematic view showing another embodiment of a light source device fabricated by using the optical element having the groove array of the present invention.

As shown in FIG. 1 to FIG. 3, an optical component for having a groove array according to a first embodiment of the present invention, wherein the optical component comprises: a light transmissive body 10, the light transmissive body is a light transmissive plate a light-emitting surface 11 and a light-emitting surface 12 opposite to each other, wherein the light-incident surface 11 faces a light source, and the light-incident surface 11 The light of the light source penetrates the light exit surface 12 from the light incident surface 11 .

The light-transmitting body 10 is provided with two or more groove arrays 20 composed of a plurality of mutually parallel groove microstructures 21 on the light-emitting surface 12, and each of the groove arrays 20 has a plurality of Trench microstructures 21 spaced apart and parallel to each other, and a plurality of said trench microstructures 21 of each of said trench arrays 20 and a plurality of said trench microstructures 21 of another of said trench arrays They are alternately disposed on the light-emitting surface 12 and collectively constitute a microstructure for the optical element to reduce glare values.

As shown in FIG. 1 and FIG. 2 , a plurality of the trench microstructures 21 of each of the trench arrays 20 are linear trenches recessed from the light exiting surface 12 toward the light incident surface 11 . And the cross-sectional shape thereof is V-shaped, and the spacing between each two adjacent trench microstructures 21 is greater than the opening width of each trench microstructure 21, thus causing a micro-between each of the trenches The light exiting surface 12 between the structures 21 forms a plurality of planar blocks 22.

As shown in FIG. 2, each of the trench microstructures 21 has an opening 211 on a side of the light exit surface 12, and a bottom corner 212 on a side of the opening 211, and from the bottom Both side edges of the bottom corner 212 are connected to the two groove slopes 213 on both side edges of the opening 211. Two of the groove slopes 213 are symmetrical to each other by a normal line 221 passing through the bottom corner 212 and perpendicular to the light exit surface.

In this embodiment, the size and proportional relationship of the plurality of trench microstructures 21 and the planar blocks 22 of each of the trench arrays 20 are as follows. As shown in FIGS. 1 and 2, the pitch L of each of the trench microstructures 21 is larger than the opening 211 of each of the trench microstructures 21 as viewed from a plane perpendicular to the trench microstructures 21. The opening width d is such that the planar width w of the planar block 22 between the adjacent two trench microstructures 21 is equal to the pitch L of the trench microstructure 21 minus the opening width d of the trench microstructure 21. In this embodiment of the present invention, the opening width d of the opening 211 of each of the trench microstructures 21 is in the range of 80% to 200% of the planar width w of each of the planar blocks 22, and is preferably implemented. In the example, the ratio of the opening width d to the plane width w is preferably a ratio of 1:1. The angle α between the two groove slopes 213 is in a range between 80 degrees and 100 degrees, and in the preferred embodiment, the angle α is preferably 90 degrees.

In addition, as shown in FIG. 2A, the bottom corner 212 of the trench microstructure 21 of the present invention is ideally a completely sharp clear angle, that is, the bottom corner width d1 or the radius theory of the corner portion at the bottom position of the bottom corner 212. It must approach zero, but limited by the limitations of the processing technique, it is impossible to achieve a theoretical ideal state at the bottom corner of the bottom corner 212, so that there is a slight curved surface at the bottom corner of the bottom corner 212. However, in order for the trench microstructure 21 to function normally, the bottom corner width d1 at the bottom corner of the bottom corner 212 is limited to a range within 10% of the opening width d of the opening 211 of the trench microstructure 21.

As shown in FIG. 3, the optical element 1 is viewed from a side of the light-emitting surface 12. In this embodiment, two sets of trench arrays 20 are disposed on the light-emitting surface 12 of the light-transmitting body 10, and the two In the set of trench arrays 20, any of the plurality of trench microstructures 21 of the set of trench arrays 20, and the respective trench microstructures 21 of the other set of trench arrays 20 are interdigitated with each other. As shown in FIG. 3, since the cross-section of each trench microstructure 21 is V-shaped, the bottom corner 212 of each trench microstructure 21 will form a pass-through microstructure 21 if viewed in a plan view. a central groove axis 214, and the groove axis 214 of each of the groove microstructures 20 of each set of groove arrays 20 are parallel to each other, and each The groove axis 214 of the trench microstructure 21 will be interdigitated with the groove axis 214 of the trench microstructure 21 of the other set of trench arrays 20.

It should be noted here that in the embodiment shown in FIG. 3, the groove axes 214 of the two sets of groove arrays 20 are respectively inclined with respect to the sides of the optical element 1, and the angle between each two mutually interlaced groove axes 214 is mutually At 90 degrees, however, the angle of the groove axis 214 of each of the groove arrays 20 and its included angle can be arranged according to actual needs, and is not limited to those disclosed in the embodiment.

For example, as shown in FIG. 4, a specific embodiment of another layout of the trench array 20 of the optical component 1 of the present invention is provided. In this embodiment, two sets of trenches are disposed on the light-emitting surface of the transparent body 10 of the optical component 1. Array 20, the groove axes 214 of the two trench arrays 20 are perpendicular to the sides of the light-transmitting body 10, respectively, and are interdigitated with each other, thus causing the respective trench microstructures 21 of the two sets of trench arrays 20 to appear in a well-shaped arrangement. The manner is disposed on the light emitting surface 12 of the light transmitting body 10.

As shown in FIG. 5, a specific embodiment of the layout of another type of trench array 20 of the optical element 1 of the present invention is shown. In this embodiment, there are three sets of different arrays of trenches 20, which are defined as a first trench array 20a, a second trench array 20b, and a third trench array 20c, respectively. The extending direction of each trench microstructure 21 of a trench array 20a is defined as a first trench axis 214a, and the extending direction of each trench microstructure 21 of the second trench array 20b is defined as a second trench axis 214b, The direction in which the respective trench microstructures 21 of the three trench arrays 20c extend is defined as a third trench axis 214c.

As shown in FIG. 5A, in this embodiment, the respective trench microstructures 21 of the first trench array 20a, the second trench array 20b, and the third trench array 20c are staggered with each other such that the respective first trench axes 214a, the second groove axis 214b, and the third groove axis 214c are interdigitated on the light-emitting surface 12 to form a plurality of the first groove axis 214a, the second groove axis 214b, and the third groove. The axis 214c intersects at an intersection 215 of the axis. As shown in FIG. 5A, at each axis intersection 215, one of the plurality of trench microstructures of the three trench arrays has a trench axis 214a, 214b, 214c intersect at the axis intersection 215, and wherein the second groove axis 214b and the third groove axis 214c are respectively symmetric with respect to the normal 216 of the first groove axis 214a, so according to this layout, by the first Each of the trench arrays 20a, the second trench arrays 20b, and the third trench arrays 20c can collectively form a plurality of triangular cells 23, and each of the triangular cells 23 is an isosceles triangle Geometric shape.

According to the embodiment disclosed in FIG. 5 and FIG. 5A, wherein the preferred embodiment is an angle between the first groove axis 214a, the second groove axis 214b, and the third groove axis 214c (ie, FIG. 5A indicates α). 1. The angles between α 2 and α 3 are both 60 degrees. Therefore, according to the layout, the grooves in the first trench array 20, the second trench array 20, and the third trench array 20 are slightly The structure 21 can collectively form a plurality of triangular elements 23, and each of the triangular elements 23 is a geometric shape of an equilateral triangle (which may also be referred to as an equilateral triangle).

As shown in FIG. 6, a specific embodiment of a light source device using the optical component of the present invention, the light source device of the embodiment includes an optical component 1 and a light emitting module 30, wherein the optical component 1 can In the optical component of any of the foregoing embodiments, the optical component 1 has a light-transmitting body 10, and the light-transmitting body 10 has a light-incident surface 11 and a light-emitting surface 12, and is disposed on the light-emitting surface 12. There is a trench array 20 composed of a plurality of trench microstructures 21. The structure of the light transmitting body 10 and the groove array 20 of the optical element 1 will not be repeatedly described.

The light source device can be a lighting device, or can be a light source of various types of flat display devices such as a mobile phone screen, a flat panel display, and the like.

The light-emitting module 30 is disposed on one side of the light-incident surface 11 of the light-transmitting body 10 of the optical element 1. The light-emitting module 30 has a plurality of light-emitting elements 31, and light generated by the light-emitting elements 31 can enter the light. The face 11 enters the light-transmitting body 10 and is transmitted through the light-emitting surface 12. The light emitting module 30 can be various light source devices, such as an LED lighting device, a light guiding element, or a backlight module of a liquid crystal display, an OLED organic light emitting element, or the like. The light generated by the light emitting module 30 can reduce the glare value through the optical component 1 to reduce the light generated by the illumination device to the human eye. Stimulate, or improve the display quality of the display screen.

Hereinafter, a method of how the optical element 1 of the present invention reduces the glare value of the light source device will be described below. As shown in FIG. 6a, a part of the light beam L1 (for example, a light beam of a small angle) generated by the light-emitting module 30 is directly projected from the light-emitting surface 12 after passing through the light-transmitting body 10 to form a first Positive illumination beam B1. Furthermore, another part of the light beam L2 generated by the light-emitting module 30 (for example, a light beam of a larger angle) is transmitted from the groove slope 213 of the trench microstructure 21 after passing through the light-transmitting body 10, due to the light beam L2. When the light-transmitting body 10 penetrates the groove slope of the groove microstructure 21, the light beam L2 penetrates different media to cause refraction, thus forming a second forward illumination beam B2 having a smaller angle. Through the above mechanism, the light generated by the light-emitting module 30 can pass through the optical element 1 to reduce the glare value thereof.

The optical element 1 of the present invention reduces the glare value in a manner that the direction of the large-angle beam changes direction by the groove microstructures 21 of the trench array 20, since the respective trench microstructures 21 and the planar blocks 22 of the trench array 20 are The equidistant spacing is disposed on the light-emitting surface 12 of the light-transmitting body 10, and the respective groove microstructures 21 are parallel to each other, thereby causing interference of the light beams penetrated from the respective groove microstructures 21, thereby achieving the effect of eliminating glare.

Therefore, the effect of eliminating glare of the optical element 1 of the present invention is related to the following parameters, including the pitch L of each of the trench microstructures 21 in the trench array 20, the opening width d of each trench microstructure 21, and the respective planes. The width w of the block 22, the angle between the groove slopes 213 of the respective trench microstructures 21, and the height h of the light-emitting elements 31 of the light-emitting module 30 with respect to the light-emitting surface 12 can be performed according to different design requirements. Adjusted to control various parameters of the ability of optical element 1 to reduce glare values.

As shown in FIG. 7 , another embodiment of the light source device of the present invention includes an optical component 1 and a light emitting module 30 , wherein the configurations of the optical component 1 and the light emitting module 30 are not repeated. Introduction. The light source device of the embodiment further positions between the light-emitting module 30 and the light-incident surface of the light-transmitting body 10, and the light-transmitting body A diffuser plate 40 is respectively disposed on the outer side of the light-emitting surface of 10, thereby improving the uniformity of illumination at each position of the light source device. At the same time, the light-emitting surface 12 of the light-transmitting body 10 of the optical element 1 and the groove microstructure 21 of the groove array 20 on the light-emitting surface 12 can be protected by the diffusion plate 40, reducing the chance of damage.

As shown in FIG. 8 , another embodiment of the light source device of the present invention is provided with a diffusing plate 40 between the light emitting module 30 and the light incident surface 11 of the optical component 1 , and the optical A light-transmitting medium 50 is disposed on the light-emitting surface 12 of the light-transmitting body 10 of the component 1. The light-transmitting medium 50 faces the light-emitting surface 12 of the light-transmitting body 10 to form the light-emitting surface 12 and the light-emitting surface. And a concave-convex shape of the plurality of grooved microstructures 21 on the 12, and a side surface of the transparent medium 50 facing the light-transmitting body 10 and the light-emitting surface 12 of the light-transmitting body 10 are adhered to each other and filled in each groove micro Within structure 21. The light-transmissive medium 50 is a flat surface with respect to the other side surface of the light-emitting surface 12, thereby forming a second light-emitting surface 51.

In practice, the transparent medium 50 may be a transparent resin material and formed on the light-emitting surface 12 of the light-transmitting body 10 by injection molding, so that the transparent medium 50 can fill the groove of each of the groove arrays 20 Structure 21.

The light generated by the light-emitting module 30 passes through the light-transmitting body 11 from the light-incident surface 11 of the light-transmitting body 10, and then passes through the light-emitting surface 12, and then passes through the light-transmitting medium 50, and then passes through the light-transmitting medium 50. The second light exit surface 12 is transmitted.

In summary, the present invention has an advantageous effect that the optical element has a microstructure formed by a plurality of trench microstructures 21 and planar blocks 22, because the microstructures include planar blocks 22, thereby enhancing The light transmittance of the optical element is such that, in addition to reducing the glare value of the illumination device, the transmittance is improved, and the effect of improving the illumination effect or reducing the glare value of the display screen is achieved. Moreover, since the optical element 1 of the present invention adopts a microstructure in the form of a groove and is less prone to wear, it has higher reliability than an optical element having a roughened surface or a protruding microstructure.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, and therefore equivalent techniques using the description and drawings of the present invention. Changes are included in the scope of protection of the present invention.

Claims (10)

An optical component having a groove array, comprising: a light transmitting body, the light transmitting body having a light incident surface and a light emitting surface disposed opposite to the light incident surface; and a plurality of trench arrays The trench arrays are disposed on the light emitting surface of the light transmissive body, and each of the trench arrays is respectively composed of a plurality of trench microstructures which are equally spaced and parallel to each other; each of the trenches a plurality of said trench microstructures of the array each having a central groove axis through each of said trench microstructures, said plurality of said plurality of said trench microstructures of said array of trenches The trench axes are parallel to each other, and a plurality of the trench axes of the plurality of trench microstructures in each of the trench arrays and a plurality of the trench microstructures of the other of the trench arrays a plurality of the groove axes are mutually staggered; wherein each of the groove microstructures of each of the groove arrays is a groove recessed from the light exiting surface toward the light incident surface, each The trench microstructure has an opening on a side of the light exit surface, and a phase a bottom corner of one side of the opening, and two groove bevels connected to both side edges of the opening from both sides of the bottom corner; and between each two adjacent trench microstructures a spacing greater than a width of the opening of each of the trench microstructures such that the light exiting surface between the plurality of trench microstructures forms a plurality of planar patches; and each of the trench microstructures The two groove slopes are symmetrical to each other, and the angle between the two groove slopes is in a range between 80 degrees and 100 degrees; and the width of the opening of each of the grooves is each The plane block has a width ranging from 80% to 200%. The optical element having a groove array according to claim 1, wherein the number of the groove arrays on the light-emitting surface of the light-transmitting body is two, and any one of the two groove arrays The groove axis of the trench microstructure of the trench array and the trench of the trench microstructure of another of the trench array The angle of the axis is 90 degrees. The optical element having a groove array according to claim 1, wherein the number of the groove arrays on the light-emitting surface of the light-transmitting body is three, and any one of the three groove arrays a plurality of the groove axes of the trench microstructure of the trench array and a plurality of the groove axes of the plurality of trench microstructures of the other two of the trench arrays coexisting at a plurality of axes At the intersection, and at each of the intersection points of the axes, the groove axes of one of the three groove arrays respectively intersect at the intersection of the axes, and Of the three groove axes intersecting at the intersection of the axes, two of the adjacent groove axes are symmetrical to the normal of the other of the groove axes. An optical element having a groove array according to claim 3, wherein an angle between each of the two adjacent groove axes among the three groove axes intersecting at each of the axis intersection positions is 60 degrees. The optical element having a groove array according to claim 1, wherein the angle of the angle between the two groove slopes of each of the groove microstructures is 90 degrees. The optical element having a groove array according to claim 1, wherein a ratio of a width of the opening of each of the grooves to a width of the planar block is 1:1. The optical element having a groove array according to claim 1, wherein a width of a corner portion of each of the groove microstructures at the bottom corner is less than 10% of a width of each of the openings. A light source device comprising: an optical component, the optical component comprising: a light transmissive body, the light transmissive body having a light incident surface and a light exit surface disposed opposite to the light incident surface; a groove array, a plurality of the groove arrays are disposed on the light-emitting surface of the light-transmitting body, and each of the groove arrays is respectively composed of a plurality of groove microstructures which are equally spaced and parallel to each other; Each of the plurality of trench microstructures of the trench array has a central portion through each of the trench microstructures a groove axis, a plurality of the groove axes of a plurality of the groove microstructures of each of the groove arrays being parallel to each other, and a plurality of the grooves in each of the groove arrays a plurality of said groove axes of a structure and a plurality of said groove axes of said plurality of said groove microstructures of said other array of grooves being interleaved; wherein said plurality of said array of said grooves The trench microstructure is a trench recessed from the light emitting surface toward the light incident surface, each of the trench microstructures having an opening on a side of the light exit surface, and a a bottom corner of one side of the opening, and two groove bevels connected to both side edges of the opening from both sides of the bottom corner; and a spacing between each two adjacent trench microstructures is greater than a width of the opening of the trench microstructure such that the light exiting surface between the plurality of trench microstructures forms a plurality of planar blocks; and two of each of the trench microstructures The groove slopes are symmetrical to each other, and the angle between the two groove slopes is between 80 degrees and 100 degrees. And the width of the opening of each of the trenches is in a range of 80% to 200% of the width of each of the planar blocks; and a light emitting module, the light emitting module is disposed on the light transmitting body One side of the light incident surface, the light emitting module has a plurality of light emitting elements, and light generated by the plurality of light emitting elements penetrates from the light transmitting surface to the light transmitting body, and then The light-emitting surface of the light-transmitting body penetrates out. The light source device of claim 8, wherein a diffusing plate is respectively disposed at a position between the light source module and the light transmitting body and a side of the light emitting surface of the light transmitting body. The light source device of claim 8, wherein the light-transmitting body is further provided with a light-transmissive medium on a side of the light-emitting surface, and the light-transmitting medium is attached to the light-emitting surface on the side close to the light-emitting surface The surface is filled in each of the trench microstructures, and the transparent medium is planar with respect to a side surface of the light-emitting surface, and forms a second light-emitting surface.