TWI414673B - Light guide microstructure plate, light guiding method, and application on window structure - Google Patents

Abstract

A light guide microstructure plate includes a substrate and a light guide microstructure layer. The substrate has a light incoming surface and a light outgoing surface, wherein the light outgoing surface has a reference perpendicular plane. The light guide microstructure layer is disposed on the light incoming surface and includes multiple optical microstructures. Each of the optical microstructures has a curving column surface structure and a slant column surface structure, which are intersecting coupling at a top. When an incoming beam, with respect to the reference perpendicular plane, is incident onto the optical microstructures, at least a portion of the incoming beam enters the slant column surface structure by an incident angle, the incoming beam is reflected out from the light outgoing surface caused by the curving column surface structure with internal total reflection.

Description

Light guiding microstructure sheet, light guiding method, and window structure application

The present invention relates to a technique of a light guiding structure, which can have the function of emitting light at a wide angle.

Saving energy is an increasingly important issue. However, as the industry flourishes, various types of home appliances, 3C products and other electrical equipment continue to increase, resulting in rising global electricity consumption. Among them, lighting equipment, in addition to providing bright light at night, also works during the day and business. Work and rest occupy an important position. According to the statistics of the power company, the electricity consumption of lighting accounts for about 30~40% of the total energy consumption of the building.

On the other hand, the sun light is an inexhaustible natural light source. If this natural light source can be effectively used for illumination, the lighting power can be saved. In the case of general windows, the efficiency of using natural light sources is still limited. Figure 1 is a schematic view showing the function of a conventional window. Referring to Figure 1, the outer wall of the house 100 will generally have a window 102. The window 102 is generally made of glass or a light-transmissive material. Therefore, the calender 104 will penetrate into the indoor light 106 from the window 102 to provide illumination, but generally only illuminate downward, and cannot enhance the indoor deep illumination, and the illumination effect. Poor.

In order to improve the utilization efficiency of the neon 104, the conventional technology also proposes that an optical light guiding structure can be utilized on the window to deflect the light for greater utilization. However, as the sun rises and falls with time, the elevation angle changes. The effect of the conventional light guiding structure is only for the incident light of a single elevation angle, and the light guiding effect presented is often limited to a single exit angle. In this way, even if it is used to provide indoor lighting, it will cause the phenomenon that the light and dark blocks change with time. This phenomenon has become a major obstacle to the current use of dawn. If this defect is effectively solved, it will enable the use of Dawning to be accepted by the market.

The invention provides a light guiding microstructure sheet which can adapt to incident light of different angles and emit it in a wide angle range. When used, for example, on a window, a portion of the neon light can be refracted to the roof ceiling to provide better illumination efficiency.

According to an embodiment, the invention provides a light guiding microstructure sheet comprising a substrate and a light guiding microstructure layer. The substrate has an incident surface and an exit surface, wherein the exit surface has a reference vertical plane. The light guiding microstructure layer is disposed on the incident light surface. The light directing microstructure layer includes a plurality of convex optical microstructures. Each of the optical microstructures has a curved cylindrical structure and a slanted cylindrical structure coupled to a top end. When an incident beam is incident on the optical microstructures at an incident angle with respect to the reference vertical plane, at least a portion of the incident beam enters the oblique cylinder structure, and is refracted after total internal reflection is generated in the curved cylinder structure. This exits the glossy surface.

According to an embodiment, the present invention also provides a light guiding method, comprising: providing a light guiding microstructure sheet; and using the light guiding microstructure sheet to receive an incident light at an elevation angle, and the incident light is continuously distributed. The range of angles is emitted. The light guiding microstructure sheet provided includes a substrate and a light guiding microstructure layer. The substrate has an incident surface and an exit surface, wherein the exit surface has a reference vertical plane. The light guiding microstructure layer is disposed on the incident light surface. The light guiding microstructure layer comprises a plurality of convex optical microstructures, each of the optical microstructures having a curved cylindrical structure and a diagonal cylindrical structure coupled to a top end. When an incident beam is incident on the optical microstructures at an incident angle with respect to the reference vertical plane, at least a portion of the incident beam enters the oblique cylinder structure, and is refracted after total internal reflection is generated in the curved cylinder surface structure. The outgoing light surface.

In accordance with an embodiment, the present invention also provides a window structure that receives a light to guide into an interior. The window structure includes a smooth penetration region and a microstructured refractive region. The smooth penetration area allows the neon to maintain the same direction of travel and enter the chamber. At least one light guiding microstructure sheet is disposed on the microstructured refractive region to refract the luminescent light into the chamber. The light guiding microstructure sheet comprises a substrate and a light guiding microstructure layer. The substrate has an incident surface and an exit surface, wherein the exit surface has a reference vertical plane. The light guiding microstructure layer is disposed on the incident light surface. The light guiding microstructure layer comprises a plurality of convex optical microstructures, each of the optical microstructures having a curved cylindrical structure and a diagonal cylindrical structure coupled to a top end. When the pupil is incident on the optical microstructures at an incident angle with respect to the reference vertical plane, at least a portion of the incident beam enters the oblique cylinder structure, and is refracted after total internal reflection of the curved cylinder structure This exits the glossy surface. Moreover, the optical microstructure directs the pupil to exit at an exit angle of the exit pupil, wherein the exit angle is continuously distributed over an angular range.

The above described features and advantages of the present invention will be more apparent from the following description.

In order to more effectively utilize the illumination effect of the backlight on the room, an embodiment of the present invention proposes a light guiding microstructure sheet that can be utilized on a window. The invention is illustrated by the following examples, but the invention is not limited to the examples, and the embodiments may be appropriately combined with each other.

2 is a schematic diagram showing the mechanism of window illumination to a room according to an embodiment of the invention. Referring to FIG. 2, for an indoor 200, it is provided with a window 202 that receives a light 104 to guide into the room 200. However, window 202 includes, for example, a smooth penetration region and a microstructured refractive region. The smooth penetration area allows the neon 104 to maintain the same direction of travel and enter the room to become the downward facing room light 106. At least one light directing microstructure sheet 204 is disposed on the microstructured refractive region to refract the neon light 104 into the chamber to become upwardly facing indoor light 108. The microstructured refractive regions are typically disposed, for example, at the upper portion to avoid affecting the window landscape, but are not limited to the manner in which this embodiment is provided.

Due to the light guiding microstructure piece 204 proposed by the present invention, when the neon 104 is incident from any elevation angle within a range of angles, the dimming light 104 received by the light guiding microstructure sheet 204 is refracted to the ceiling direction and is diverged into one. Wide-angle range to achieve large-area illumination, and will not change significantly with the elevation angle, but maintain the wide-angle emission range.

The structure and mechanism of action of the light guiding microstructure sheet 204 of Fig. 2 will be described below. 3 is a schematic cross-sectional view of an optical microstructure of a light guiding microstructure sheet and a mechanism of action on incident light, in accordance with an embodiment of the present invention. Referring to FIG. 3, the light guiding microstructure sheet includes a substrate 210 and a light guiding microstructure layer 212. The substrate 210 has an incident light surface 210a and an exit light surface 210b, wherein the exit light surface 210b has a virtual reference vertical plane. The light guiding microstructure layer 212 is disposed on the incident light surface 210a. Light directing microstructure layer 212 includes a plurality of convex optical microstructures. Each of the optical microstructures has a curved cylindrical structure 214 and a diagonal cylindrical structure 216 that are cross-coupled to a top end. The slanted cylindrical structure 216 is, for example, convexly joined by two inclined faces 216a, 216b.

The incident light beams a1 to a6 are incident on the optical microstructure of the light guiding microstructure layer 212 at an incident angle with respect to the reference vertical plane. The angle of incidence relative to the reference vertical plane is also referred to as the elevation angle, that is, the direction in which the pupil is incident on the light guiding microstructure sheet.

Here, the optical microstructure is a column structure, and is arranged in parallel with each other to form the light guiding microstructure layer 212.

For incident light a1~a6 incident at an elevation angle θ, when entering the optical microstructure, due to the different structure of the incident region, the direction of light travel will be changed to the outgoing light a1' via the characteristics of refraction, reflection or total reflection. ~a6'. For example, the incident light a1 and a2 contact the inclined surface 216b of the oblique cylindrical surface structure 216 to generate the incident light surface 210a refracted through the substrate 210, and the total reflected light a1' and a2' are generated when the contact light surface 210b is contacted again. The light is directed back into the incident direction and cannot enter the room. The incident light a3~a5 contacts the inclined surface 216a of the oblique cylindrical structure 216 to generate an optical microstructure that is first refracted into the light guiding microstructure layer 212, and then generates total internal reflection through the curved surface of the curved surface structure 214, and passes through the substrate. The incident light surface 210a of 210, and finally contacts the exit light surface 210b to produce a second refraction, exhibiting the emitted light a3'~a5'. The incident light a6 first contacts the curved surface of the curved cylindrical surface structure 214 of the light guiding microstructure layer 212 to generate a first refraction into the optical microstructure, and a second refraction is generated through the exiting optical surface 210b to present the emitted light a6'.

With the incident light of a single elevation angle θ, the optical microstructure of the light guiding microstructure layer 212 is expanded to have a beaming light a3'~a6' distributed over a wide range of angles, thereby making the indoor depth different. The ceiling can achieve uniform light dispersion, which evenly enhances the indoor illumination.

4 is a schematic diagram showing the simulation of light emission for a single elevation angle incident light generated by an optical microstructure according to an embodiment of the invention. Referring to FIG. 4, for a single elevation angle incident light 230, it passes through the inclined surface of the optical microstructure and then contacts the curved surface, and the total total reflection from the curved surface presents the outgoing light 232, and the intensity angular distribution is described by the outgoing light angular intensity distribution line 234, which represents Incident light path 236, the intensity of light obtained in an exit angle direction. In other words, the incident light 230 is incident at a fixed angle, but the exiting light 232 that is refracted away is continuously distributed over an angular range upward, and the detailed analysis will be described later in FIGS. 14 to 18.

FIG. 5 is a schematic diagram showing an angular distribution of emitted light after incident light of different elevation angles is refracted by an optical microstructure according to an embodiment of the invention. Referring to FIG. 5, the optical microstructure can receive incident light of different elevation angles, for example, incident light with a high elevation angle α, a medium elevation angle β, and a low elevation angle γ. The contact slope or curved surface produces a first refraction, and a portion of the light can pass through the light exit surface. Internal total reflection is guided back to the incident direction. A portion of the light directly contacts the light exit surface to refract away from the optical microstructure and most of the light is totally reflected through the curved surface, causing refraction away from the optical microstructure when contacting the light exit surface.

The incident light of the elevation angles α, β, and γ can be expanded to be larger than the angle perpendicular to the exiting light surface through the optical microstructure, and distributed over an angular range to be emitted. This can effectively solve the phenomenon that the indoor ceiling light trace changes due to the change of the sun's incident elevation angle with time in the traditional structural design. This can greatly improve the benefits of the use of light guide microstructures.

FIG. 6 is a schematic diagram showing the simulation of light emission of a single elevation angle incident light through an optical microstructure to expand the beam according to an embodiment of the invention. Referring to Figure 6, the representation is the same as in Figure 4. It can be seen from the analysis results that the incident beams 300, 302, and 304 corresponding to the three elevation angles of FIG. 5 have the effect of expanding the beam. That is to say, the optical microstructures of an embodiment of the present invention can receive incident light of different elevation angles while still maintaining the flared light distribution of the wide angle range.

7-11 illustrate cross-sectional views of a light directing microstructure sheet in accordance with various embodiments of the present invention. Referring to FIG. 7, the substrate 210 of the light guiding microstructure sheet and the light guiding microstructure layer 212 are an integral structure of the same material, and the radius of curvature of the curved surface structure 214 is, for example, a curved surface of a single curvature R1. In addition, the inclined cylindrical surface structure 216 is, for example, a structure of two inclined surfaces.

Referring to Fig. 8, in addition to the structure of Fig. 7, the slanted cylindrical structure 216 has a structure which may be a single slanted surface, but the radius of curvature R2 of the curved cylindrical surface structure 214 needs to be adjusted. In general, the number of slopes of the inclined cylindrical structure 216 is not limited to one or two, but may be more.

Referring to Figure 9, the variation of the curved cylindrical structure 214 can also be designed, for example, by a combination of two different radii of curvature R3, R4, but not limited to the curved surface, but more curved surfaces.

Referring to FIG. 10, the foregoing structure is a structure in which the substrate 210 and the light guiding microstructure layer 212 are integrated. However, the light directing microstructure layer 212 can also be fabricated directly on the substrate 210, respectively. The substrate 210 is, for example, glass or a light transmissive material.

Referring to FIG. 11, a further variation is to fabricate the light guiding microstructure layer 212 on a light transmissive film 250. It can then be adhered to the substrate 210. At this time, the substrate 210 is, for example, a window glass to be applied. Such a method can be conveniently utilized for various purposes, and the existing window can be directly adhered to the light guiding microstructure film.

The manner in which the light guiding microstructure sheet is produced can be, for example, injection or thermoforming. The optical microstructure of the light guiding microstructure layer can be formed, for example, by a stamping or transfer method on a transparent substrate to form a light guiding microstructure sheet. Further, the optical microstructure may be formed, for example, on a transparent film to form a light guiding microstructure film. The transparent material described above may be plastic, glass, quartz, or other types of transparent materials.

The design of the optical microstructure is described below. FIG. 12 is a schematic diagram showing geometrical parameters of an optical microstructure according to an embodiment of the invention. Referring to FIG. 12, the optical microstructure of the light guiding microstructure layer 212 is a columnar structure, and the cross-sectional structure has two faces which are a curved cylindrical structure and a diagonal cylindrical structure. In the case of a single curved surface and two inclined surfaces, the radius of curvature R, the slope of the slope and the area ratio determine the efficiency of the beam expansion. Therefore, several design parameters including vertex coordinates (H _x , H) need to be considered. ), the radius of curvature R, the oblique angle A1 of the lower slope, and the angle A2 of the two slopes. In addition, the height of the lower slope is indicated by h, and the width of the bottom of the optical microstructure is indicated by P.

The conditions for designing an optical microstructure are, for example:

among them

_{(2) H x = P +} h × (cot (A 1 + A 2 -π) -cot (A 1)) - H × cot (A 1 + A 2 -π).

However, the above design conditions are only one way that can be adopted, but not the only way.

If a single beveled structure is used, the design will be somewhat different. FIG. 13 is a schematic diagram showing geometrical parameters of an optical microstructure according to an embodiment of the invention. Referring to FIG. 13, the optical microstructure of the light guiding microstructure layer 212 is exemplified by a curved surface of a single curvature and a slope, and the oblique angle of the slope is A.

The conditions for designing the optical microstructure of Figure 13 are, for example:

among them

(4) H _x = PH × cot (A).

Further, the above parameter condition is, for example, a ratio of H/P such as a range of 0.25-3. The range of the bevel angles A and A _{1 is} , for example, 30 to 90 degrees.

The analysis of the performance improvement produced by the present invention is described below. FIG. 14 is a schematic diagram showing an angle definition for performance analysis according to an embodiment of the invention. Referring to Figure 14, a side view of light directing microstructure sheet 204 has a virtual reference vertical plane, indicated by a dashed line at 90 degrees. The light guiding microstructure piece 204 is 0 degrees with respect to one side of the reference vertical plane and 180 degrees on the other side, increasing in a counterclockwise direction. The incident light direction has an elevation angle θ for the reference vertical plane. In other words, the incident light passes through the action of the optical microstructure, and the emitted light can be divided into the outgoing light 3300 of less than 90 degrees and the outgoing light 3302 of more than 90 degrees. For example, in the application of windows, the outgoing light 3302 will travel in the direction of the ceiling, and the improvement of its performance will contribute to the application of illumination.

15-18 are schematic diagrams showing the performance analysis of beam expansion for a plurality of different incident elevation angles according to an embodiment of the invention. Referring to Fig. 15, an incident light having an elevation angle of 40 degrees is taken as an example, and a solid line represents an optical structure in which an optical microstructure is a light-emitting effect composed of a curved surface and a slope. The dashed line represents the light-emitting effect of the curved surface of the optical microstructure replaced by a bevel. The dotted line layout is limited to a single exit direction, but the solid line distribution has a large distribution range, for example, covering 65-165 degrees, wherein more than 90 degrees of light output is mostly, and the distribution angle range is much larger than the dotted line distribution. . That is to say, the angle is defined in accordance with FIG. 14 in that the direction of the light-guiding microstructure piece 204 on the side of the reference vertical plane (dashed line) and not on the same side as the incident light is 0 degrees, and increases in the counterclockwise direction. As such, the light directing microstructure sheet 204 is 180 degrees on the other side of the reference vertical plane.

Referring to Fig. 16, an incident light having an elevation angle of 50 degrees is taken as an example, and the outgoing light distribution has the same characteristics as those of Fig. 15.

Referring to Fig. 17, an incident light having an elevation angle of 60 degrees is taken as an example, and the outgoing light distribution has the same characteristics as those of Figs. 15 and 16, and most of them can be refracted and utilized.

Referring to FIG. 18, the incident light with an elevation angle of 70 degrees is taken as an example, and the outgoing light distribution has the same characteristics as that of FIG. 15-17. As can be seen from the comparison between the solid line and the broken line, the efficiency of utilization is greatly improved.

It can also be proved from the analysis of Figs. 15-18 that the design of the present invention can accommodate incident light of different elevation angles, and therefore has greater utility, and is not limited to incident light of a specific elevation angle.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the invention, and any one of ordinary skill in the art can make some modifications and refinements without departing from the spirit and scope of the invention. The scope of the invention is defined by the scope of the appended claims.

100. . . houses

102. . . window

104. . . Dawn

106. . . Indoor light

108. . . Indoor light

200. . . indoor

202. . . window

204. . . Light guiding microstructure film

210. . . Substrate

210a. . . Incident light surface

210b. . . Glow out

212. . . Light guiding microstructure layer

214. . . Cylindrical structure

216. . . Oblique cylindrical structure

216a, 216b. . . Bevel

230. . . Incident light

232‧‧‧Out of light

234‧‧‧Extruding light intensity distribution line

236‧‧‧Light path

250‧‧‧Transparent film

300, 302, 304‧‧‧ incident beam

3300, 3302‧‧‧ outgoing light

Figure 1 is a schematic view showing the function of a conventional window.

2 is a schematic diagram showing the mechanism of window illumination to a room according to an embodiment of the invention.

3 is a schematic cross-sectional view of an optical microstructure of a light guiding microstructure sheet and a mechanism of action on incident light, in accordance with an embodiment of the present invention.

4 is a schematic diagram showing light exiting of a single elevation angle incident light through an optical microstructure according to an embodiment of the invention.

FIG. 5 is a schematic diagram showing an angular distribution of emitted light after incident light of different elevation angles is refracted by an optical microstructure according to an embodiment of the invention.

6 is a schematic diagram showing light exiting of an incident light passing through an optical microstructure for different elevation angles according to an embodiment of the invention.

7-11 illustrate cross-sectional views of a light directing microstructure sheet in accordance with various embodiments of the present invention.

FIG. 12 is a schematic diagram showing geometrical parameters of an optical microstructure according to an embodiment of the invention.

FIG. 13 is a schematic diagram showing geometrical parameters of an optical microstructure according to an embodiment of the invention.

FIG. 14 is a schematic diagram showing an angle definition for performance analysis according to an embodiment of the invention.

15-18 are schematic diagrams showing the performance analysis of beam expansion for a plurality of different incident elevation angles according to an embodiment of the invention.

210. . . Substrate

210a. . . Incident light surface

210b. . . Glow out

212. . . Light guiding microstructure layer

214. . . Cylindrical structure

216. . . Oblique cylindrical structure

216a, 216b. . . Bevel

Claims (46)

A light guiding method includes: providing a light guiding microstructure piece; and receiving, by the light guiding microstructure piece, an incident light at an elevation angle, and emitting the incident light in a continuously distributed angular range, the incident light The elevation angle of the light guide microstructure includes: a substrate having an incident light surface and an exit light surface, wherein the exit light surface has a reference vertical surface; and a light guiding microstructure layer Provided on the incident light surface, wherein the light guiding microstructure layer comprises a plurality of convex optical microstructures, each of the optical microstructures having a curved cylindrical structure and a diagonal cylindrical structure cross-coupled to a top end, Wherein the oblique cylinder structure comprises at least two slopes, wherein when an incident beam is incident on the optical microstructures at an incident angle with respect to the reference vertical plane, at least a portion of the incident beam enters the oblique cylinder structure The exit pupil is refracted after the internal cylindrical structure is totally totally reflected. The light guiding method according to claim 1, wherein a part of the incident light beam enters the curved cylindrical surface structure, and after the curved cylindrical surface structure is refracted, the refractive light surface is further refracted and penetrated. The light guiding method of claim 1, wherein a part of the incident beam enters the curved cylindrical structure, and the refractive structure of the curved cylindrical surface is refraction, and after the total cylindrical internal structure is internally reflected. Refraction penetration at the exit pupil. The light guiding method of claim 1, wherein the angle range covers 65-165 degrees. The light guiding method of claim 1, wherein the curved cylindrical structure of the optical microstructure is provided to include at least one curved surface. The light guiding method of claim 5, wherein the curved cylindrical structure of the optical microstructure is a single curved surface. The light guiding method of claim 5, wherein the curved cylindrical structure of the optical microstructure is provided to include two curved surfaces having different radii of curvature. The light guiding method of claim 5, wherein the curved cylindrical structure of the optical microstructure is provided to include a plurality of curved surfaces having different radii of curvature. The light guiding method of claim 1, wherein the oblique cylindrical structure of the optical microstructure provided comprises two inclined surfaces of different slopes, and the convex intersection is formed. The light guiding method of claim 1, wherein the oblique cylindrical structure of the optical microstructure provided comprises a plurality of inclined faces of different slopes, and the convex intersections. The light guiding method of claim 1, wherein the light guiding microstructure layer is represented by P at a bottom width of the substrate, and the height of the light guiding microstructure layer is represented by H, the inclined cylinder surface The oblique angle of the structure to the substrate is A, which meets the following conditions: H/P is in the range of 0.25-3; and A is in the range of 30-90 degrees. A window structure that receives a light to guide into a chamber, comprising: a smooth penetration region that allows the pupil to maintain the same direction of travel and enters the chamber; and a microstructured refractive region that is provided with at least one light guide a microstructured sheet for refracting the luminescence into the chamber, wherein the light guiding microstructure sheet comprises: a substrate having an incident light surface and an exit light surface, wherein the exit light surface has a reference vertical surface; and a guide An optical microstructure layer disposed on the incident light surface, wherein the light guiding microstructure layer comprises a plurality of protruding optical microstructures, each of the optical microstructures having a curved cylindrical structure and a diagonal cylindrical structure cross-coupled a top end, wherein the oblique cylindrical structure includes at least two inclined surfaces, wherein at least a portion of the incident light beam enters the oblique light when the light is incident on the optical microstructures at an incident angle with respect to the reference vertical plane After the cylindrical structure, the exiting light surface is refracted after the total surface reflection of the curved cylinder surface structure, wherein the incident angle of the light is varied, wherein the optical microstructure guides the light, In the exit surface at an exit angle, the exit angle which is continuously distributed in a range of angles. The window structure of claim 12, wherein a portion of the incident beam enters the curved cylindrical structure, and after the curved cylindrical structure is refracted, the refractive light is further refracted. The window structure of claim 12, wherein a portion of the incident beam enters the curved cylindrical structure, and the curved cylindrical structure Refraction is generated, and after total internal reflection is generated in the curved surface structure, the light is refracted and penetrated. The window structure of claim 12, wherein the angle range covers 65-165 degrees, wherein the angle is defined on one side of the reference vertical plane and is not 0 degrees with the same side of the incident light, The counterclockwise direction is increased such that the exit pupil is 180 degrees on the other side of the reference vertical plane. The window structure of claim 12, wherein the curved cylindrical structure of the optical microstructure comprises at least one curved surface. The window structure of claim 16, wherein the curved cylindrical structure of the optical microstructure is a single curved surface. The window structure of claim 16, wherein the curved cylindrical structure of the optical microstructure comprises two curved surfaces having different radii of curvature. The window structure of claim 16, wherein the curved cylindrical structure of the optical microstructure comprises a plurality of curved surfaces having different radii of curvature. The window structure of claim 12, wherein the oblique cylindrical structure of the optical microstructure comprises two inclined faces of different slopes, and the convex crossover. The window structure of claim 12, wherein the oblique cylindrical structure of the optical microstructure comprises a plurality of slopes of different slopes, and the projections are convex. The window structure of claim 12, wherein the window structure The substrate and the light guiding microstructure layer are an integral structure of the same material. The window structure of claim 12, wherein the optical microstructures of the light guiding microstructure layer are directly formed on the substrate. The window structure of claim 12, wherein the substrate is a window glass. The window structure of claim 12, wherein the substrate is a transparent film for adhering to a window glass. The window structure of claim 12, wherein the optical microstructures are a plurality of strip-shaped units arranged in parallel to form the light guiding microstructure layer. The window structure of claim 12, wherein the microstructured refractive region is disposed above the smooth penetration region. The window structure of claim 12, wherein the light guiding microstructure layer is represented by P at a bottom width of the substrate, and the height of the light guiding microstructure layer is represented by H, the inclined cylinder structure The oblique angle to the substrate is A, which meets the following conditions: H/P is in the range of 0.25-3; and A is in the range of 30-90 degrees. A light guiding microstructure sheet comprising: a substrate having an incident light surface and an outgoing light surface, wherein the outgoing light surface has a reference vertical surface; and a light guiding microstructure layer disposed on the incident light surface, wherein The light guiding microstructure layer comprises a plurality of convex optical microstructures, each of the optical microstructures having a curved cylindrical structure and a diagonal cylindrical structure cross-coupled to a top end, The oblique cylindrical structure includes at least two inclined surfaces, wherein when an incident light beam is incident on the optical microstructures at an incident angle with respect to the reference vertical plane, at least a portion of the incident light beam enters the oblique cylindrical surface structure, The exit pupil is refracted after the total cylindrical reflection of the curved surface structure, wherein the incident angle of the incident beam varies. The light guiding microstructure sheet according to claim 29, wherein a part of the incident light beam enters the curved cylindrical surface structure, and after the curved cylindrical surface structure is refracted, the refractive light surface is further refracted and penetrated. The light guiding microstructure sheet according to claim 29, wherein a part of the incident light beam enters the curved cylindrical surface structure, and the curved cylindrical surface structure generates refraction, and the internal cylindrical total structure generates internal total reflection. After that, it is refracted and penetrated on the exiting light surface. The light guiding microstructure sheet of claim 29, wherein the optical microstructure guides the incident beam such that the exiting light exits at an exit angle, wherein the exit angle is continuously distributed over an angular range . The light guiding microstructure sheet of claim 32, wherein the angle range covers 65-165 degrees. The light guiding microstructure sheet of claim 29, wherein the curved cylindrical structure of the optical microstructure comprises at least one curved surface. The light guiding microstructure sheet of claim 34, wherein the curved surface structure of the optical microstructure is a single curved surface. The light guiding microstructure sheet of claim 34, wherein the curved cylindrical structure of the optical microstructure comprises two curved surfaces having different radii of curvature. The light guiding microstructure sheet of claim 34, wherein the curved cylindrical structure of the optical microstructure comprises a plurality of curved surfaces having different radii of curvature. The light guiding microstructure sheet of claim 29, wherein the oblique cylindrical surface structure of the optical microstructure comprises two inclined surfaces with different slopes, and the convex crossover. The light guiding microstructure sheet of claim 29, wherein the oblique cylindrical surface structure of the optical microstructure comprises a plurality of inclined surfaces with different slopes, and the convex intersections. The light guiding microstructure sheet of claim 29, wherein the substrate and the light guiding microstructure layer are an integral structure of the same material. The light guiding microstructure sheet of claim 29, wherein the optical microstructures of the light guiding microstructure layer are directly formed on the substrate. The light guiding microstructure sheet of claim 29, wherein the substrate is glass. The light guiding microstructure sheet of claim 29, wherein the substrate is a transparent film that can be adhered to another transparent body. The light guiding microstructure sheet of claim 29, wherein the optical microstructures are a plurality of strip-shaped units arranged in parallel to form the light guiding microstructure layer. The light guiding microstructure sheet of claim 29, wherein the incident beam is a neon light. The light guiding microstructure sheet according to claim 29, which Wherein the light guiding microstructure layer is represented by P at a bottom width of the substrate, and the height of the light guiding microstructure layer is represented by H, and the oblique column structure and the substrate have an oblique angle of A, which is consistent with The following conditions: H/P in the range of 0.25-3; and A in the range of 30-90 degrees.