KR20120011808A - Light-guide apparatus with micro-structure, back light unit comprising the same and liquid crystal display comprising the same - Google Patents

Abstract

PURPOSE: A light-guide apparatus with a micro-structure, a back light unit comprising the same and a liquid crystal display comprising the same are provided to improve brightness while maintaining light emission. CONSTITUTION: A light guide layer(12) includes a light incidence side and receives the light from a side light source. A reflection layer(11) reflects a part of light, facing to the reflection layer, which is accommodated into the light guide layer again. A light distribution layer is formed in the top side of the light guide layer opposite to the reflection layer and includes an emission side radiating the light which is accommodated to the light guide layer. The light guiding layer is interposed between a reflection layer and a spectral layer. The emission side and the incident side are perpendicular to each other. A part of the light in the light guide layer is projected to the emission side.

Description

Light-guide apparatus with micro-structure, back light unit comprising the same and liquid crystal display comprising the same

The present invention refers to a light guiding device having a kind of micro structure, especially a light guiding device of a micro structure which is extruded and manufactured as a kind of integral molding and has reflection, spectroscopy, and light guiding functions. Used to construct

The light guide plate is a medium for guiding the light in the monitor light distribution module. Since a plurality of light distribution modules are mainly light-measuring type, the light guide plate is capable of guiding and emitting light from a direction toward the front of the monitor through the light guide plate, thereby controlling the uniformity of the luminance and brightness of the panel. Enhance.

The principle of the light guide plate is to enter the light beam into one end of the light guide plate and to generate a light reflection to send the light beam to the other end of the light guide plate. In particular, a specific structure of the light guide plate causes diffusion at each angle to guide the reflected light to the front of the light guide plate. The higher the value, the better the light guiding ability. In addition, some rays other than the light emitted from the front face introduce the reflector plate under the light guide plate into the light guide plate again.

The conventional technique shown in Fig. 1 is a light source module of a light emitting component proposed in US Patent No. 7,108,385 (published on September 19, 2006), which shows a kind of light guide plate, among which a liquid crystal panel 57 and diffusion The film 56, the lozenge lens module 55, the light source module 50, the light emitting plane 523, the light guide plate 520, the reflecting plate 524, the light source module 50, the circuit board 51 and the semi-light layer 54 Each component described above forms one light distribution module 5.

However, the defects of each component of the conventional light guide plate are summarized as follows, which can generate all the reflector plate, light guide plate, diffuser plate, and rhombic lens.

<Defects of each part of the prior art> Item function fault Reflector (524) 1.Reuse rays by reflecting rays into the light guide plate 1. There is air layer between the plate, so the light loss is increased and the light utilization rate is low.
2. Increase the cost of light distribution module. Light guide plate 520 1. Direct the light beam from the lateral light source in the forward direction. 1. It should be used as light source light guide part by using dots or structure. This part has a very bright bright line phenomenon, so the visual effect is not good.
2. The diffuser film should be homogenized by applying fog effect, bright line phenomenon and ray scattering. Diffusion Film (56) 1.Fog effect of bright line phenomenon of light guide plate
2.Equalization of light guide plate beams.
3. Protect the lozenge lens from damage. 1. Increased light distribution module components. Lozenge Lens Module (55) 1.Convergence, increase brightness. 1. Difficult to design, easy to process and increase the cost of light distribution module.
2.Micro structure is easily damaged or scratched.
3. Processing phenomenon overlaps with light guide plate microstructure.

As shown in FIG. 2, the light guide plate 520 of the related art has a problem in that light is lost during the conduction of light rays. For the effect of increasing the reflected light in the light distribution module 5, the prior art adds a new reflector 524, which has an air layer 525 between the conventional reflector 524 and the light guide plate 520, so that the loss rate of light 581 is reduced. This increase to about 8% lowers the light utilization rate and increases the manufacturing process and cost of the light distribution module (5).

In addition, if the light guide plate of the prior art adopts the technology of the printed light guide plate, defects in which the product yield rate is lowered or bright bands are easily generated as the printed light guide plate passes through the screen, oil, and screen printing technology. 3 is a schematic diagram in which a bright band phenomenon occurs in the light guide plate 520 of the related art. Outgoing light is not uniform on the light exit surface of the light guide plate 520 so that the brightest area 582 (i.e., the bright line) in the shape of a line appears in the center, the next brightest area 583, and the outermost relatively dark area 584. .

As described above, in the conventional technology, there is an air layer between the light guide plate and the plate material, so that the loss of light is increased, the cost of the light distribution module is high, the bright line phenomenon is prominent, and the defect of the microstructure damage easily occurs in the processing of the lozenge lens. There are many things to improve.

The main object of the present invention is to increase the light utilization rate, the uniformity of the light output, the brightness is brighter, the light distribution ratio is lower, and the light guide with the micro structure is not required. A light distribution module and a liquid crystal monitor having the light guiding device are provided.

In order to reach the above object, the present invention provides a light guide device having a kind of micro structure, which is combined with one light source to form a light distribution module of a liquid crystal monitor.

This light guide device includes the following components, and has one spectral layer, one light guide layer, and one reflective layer. The light guiding layer has one light incident surface, which is used to receive one light emitted from the light source. The reflective layer reflects the light in the light guide layer back to the light guide layer.

The surface of the side surface slightly away from this reflective layer of the spectral layer is one light emitting surface and the light guide layer is located between the reflective layer and the spectral layer. The light incident surface and the light emitting surface are vertical and allow at least a portion of the light in the light guide layer to be emitted to the light emitting surface. Among them, the reflective layer, the light guide layer and the spectroscopic layer are extruded integrally, and there is no air contact surface between the reflective layer and the light guide layer. In addition, the upper surface of the reflective layer is a reflective surface, and a three-dimensional microstructure is provided on the reflective surface.

In a specific embodiment, data on the depth and width of the microstructure of the reflecting surface should conform to the following equation.

(Where n1 <n2, H2 is the depth of the reflecting surface microstructure, P2 is the width of the reflecting surface microstructure, n1 is the refractive index of this spectral layer, n2 is the refractive index of the light guide layer)

In a specific embodiment, the light guide device having this microstructure must meet at least one of the conditions listed below.

,

,

P2 value is between 80µm and 250µm

The numerical value of the depth width (H2 / P2) of the reflecting surface is between 0.2 and 0.319, and the range of ratio values between the spectral layer thickness t and the light guide layer thickness t2 is

ego,

The value of the reflecting surface depth / width ratio (H2 / P2) is the G value, which is the distance between two neighboring microstructures, between 0 and 1.4 mm when the reflecting surface microstructure is a discontinuous microstructure.

In a relatively specific embodiment, this microstructured light guiding device must further comprise at least one of the conditions listed below.

A number of diffuse particles, which are added to the light guide layer,

Many diffuse particles, which are added to the spectral layer

A three-dimensional micro structure is installed on the exit surface,

Two kinds of plastic materials of different refractive indices are mixed in this reflective layer,

Many reflective particles are added to this reflective layer,

A coarse or fog surface of one controllable density distribution forms on this exit surface.

The integrated light guide device and the light guide device have a micro structure that increases light utilization, emits light more uniformly, brightens brightness, lowers light distribution ratio, and does not require a rhombic lens module. It is possible to provide a light distribution module and a liquid crystal monitor.

1 is a schematic view of a light source module of a light emitting part of the conventional technology.
Figure 2 is a schematic diagram of the light loss of the conventional light guide plate in the course of light conduction.
3 is a schematic view of a bright strip of a light guide plate of a conventional technology.
4 is a schematic diagram of a first embodiment of a light guide device having a microstructure of the present invention;
Fig. 5 is a schematic diagram of reducing light consumption in the first embodiment of the light guide device having the microstructure of the present invention.
6 is a luminance relationship curve diagram of a light guide device having a microstructure of the present invention.
7 is a schematic view of various embodiments of a reflective layer, a light guide layer, and a spectroscopic layer structure in a light guide device having a microstructure of the present invention.
8A to 8O are schematic diagrams of different embodiments of the microstructure of the light guide device having the microstructure of the present invention, respectively.
Figure 9 is a schematic diagram of yet another embodiment of a light guide device having a microstructure of the present invention;
10 is a manufacturing process diagram of one embodiment of the co-extrusion manufacturing process of the light guide device having a microstructure of the present invention.
Figure 11 is a schematic diagram of one embodiment of a co-extrusion fabrication process of the present invention microstructured light guide device.
12 is a schematic view of a jetting process for forming a rough surface on the light exit surface of the light guide device having the microstructure of the present invention.
Fig. 13A is a schematic diagram of another embodiment of the light guide device having the microstructure of the present invention;
FIG. 13B is a corresponding curve diagram between an overshape angle and light brightness of the light exit surface test of the light guide device of the present invention illustrated in FIG. 13A; FIG.
14 is a schematic view of an embodiment of the light brightness obtained by testing the light guide device light exit surface of the present invention.
15A, 15B and 15C are diagrams showing different embodiments in which the depth width (H2 / P2) of the reflecting surface in the light guide device of the present invention is shown for light reflection, respectively.

In more detail, in order to describe the light guide device having a micro structure, the light distribution module and the liquid crystal monitor having the light guide device, which will be described in detail, the present invention will be described in detail with the following drawings.

(1) Outline of the present invention device (double layer structure)

As shown in FIG. 4, the light guide device 1 having the microstructure of the present invention is a light guide device concentrated in one kind, and is formed on the reflective surface between the light guide layer and the reflective layer of the light guide device through a comprehensive manufacturing process that is integrally extruded. By forming a three-dimensional microstructure so that a single light guide device has the effect of spectroscopy, light guide and light reflection, it can be applied to any large sized panel of any side light source (2) type, and the body of the light guide device (1) includes ,

One reflective layer 11,

One light guiding layer 13

Illustrated in FIG. 4 is one of the main body embodiments of the light guide window 1 having the microstructure of the present invention. The light guide window 1 having the micro structure is a light guide device having a micro structure of a three-in-one reproduction (produced together) of a simple integral molding.

(2) Outline of reflective layer 11 (lower layer) of the present invention

One of several important concepts of the light guide device 1 having the microstructure of the present invention is to design a reflection environment in the light guide device 1 by using the design of the reflecting surface microstructure. Instead of distributing the light source in a traditional halftone method, a microstructure is formed on the reflective surface between the reflective layer 11 and the spectral layer 13 to replace the use of a reflecting plate. Among them, a linear light source or a point light source is formed as a surface light source by using diffused particles of the microstructured spectral layer 13, and the reflection pieces are used to correspond to the microstructures of the spectral layer 13 and the reflective layer 11 as well. Without it, the effects of reflection, light guiding and spectroscopy are attained.

Through the above-described technique, the present invention reduces the light loss caused by the reflection fragment. The main method is the reflection fragment or the reflection layer 11 formed simultaneously with the light guide layer 12 capable of spectroscopy. As shown in FIG. 5, the light guide device 1 having the microstructure of the present invention increases the microstructure and one layer of reflective layer 11 on one side of the light guide layer 12 and is formed simultaneously with the light guide device 1. In this way, there is no air contact surface layer between the reflective layer 11 and the light guide layer 12 in the main body of the light guide device 1 having the microstructure. Since there is no air layer between the reflective layer 11 and the light guide layer 12 plate of the present invention, the light guide device 1 having the microstructure of the present invention is light as compared with the conventional technique with air gap as illustrated in FIG. The utilization rate is increased, and the microstructure of the light guide layer reflects and diffuses the light, and at the same time has the effect of reflection and light guide, thereby reducing the light consumption rate to 4% or less. At the same time, the manufacturing process of the light guide device 1 having the microstructure of the present invention is simple, so that the process of attaching the film to the light guide device, the light distribution module manufacturing process, and the cost can be reduced.

Specific embodiments of the reflective layer 11 of the light guide device 1 having the microstructure of the present invention are as follows.

(1) The reflective layer 11 of the present invention is manufactured by mixing two plastic materials having different refractive indices or adding a small amount of reflective particles to the plastic material of the reflective layer.

(2) If the reflective layer 11 is prepared by mixing two plastic materials having different refractive indices, the mixing ratio of the plastic materials having different refractive indices is 7: 3.

(3) If the reflective layer 11 is manufactured by adding the reflective particles 111, the refractive index of the reflective particles 111 should be 2.2 to 3.2 and the addition concentration should be less than 0.5% by weight percentage.

(4) The diameter of the reflective particles 111 is between 1-100 μm, and the most suitable range is 4-50 μm.

(5) The refractive index of the plastic material of the reflective layer 11 itself is between 1.6 and 2.5.

(6) The refractive index difference between the reflective layer 11 and the light guide layer 12 is between 0.05-1.

(3) Overview of the spectral layer 13 (upper layer) of the microstructure of the present invention

In the embodiment of the light guide device 1 having the microstructure of the present invention, a linear light source or a point light source is formed as a surface light source using a plurality of diffused particles 131 added to the spectroscopic layer 13 to reach the effect of spectroscopy. This leads to the effect of masking spectroscopy and defects, thereby enhancing the light utilization rate.

Specific examples of the spectral layer 13 of the light guide device 1 having the microstructure of the present invention are as follows.

(1) A small amount of diffused particles 131 are added to the spectral layer 13, or the surface of the light exit surface 132 of the spectral layer 13 is subjected to fog treatment.

(2) The difference between the refractive indices of the plastic substrates of the diffusion molecule 131 and the spectral layer 13

Between.

(3) The diameter of the diffusion molecule 131 is between 2 µm and 10 µm.

(4) The roughness Ra of the surface (light emitting surface) 132 of the spectral layer 13 improves the brightness and uniformity between 1 µm <Ra <6 µm.

(5) The refractive index of the plastic base material of the spectral layer 13 itself is between 1.42-1.63.

(4) microstructure of the present invention

In the embodiment of the light guide device 1 having the microstructure of the present invention, the neighboring surfaces of the light guide layer 12 and the reflective layer 11 (ie, the lower side of the light guide layer 12 or the upper side of the reflective layer 11). ) Is defined as one reflective surface. The present invention increases the design of a number of microstructures on this reflective surface and / or the upper surface (light emitting surface 132) of the spectral layer 13. In the present invention, the spacing between the microstructures is the same distance, the same distance, or the cross-arrayed microstructures. Each microstructure has a tertiary (for example pyramid) structure, and each face has an asymmetrical or symmetrical triangle, a triangular structure with asymmetrical or symmetrical sides, a columnar structure, a circular structure, and the like. Specific embodiments are as follows.

The depth width of each microstructure of the reflecting surface and / or the light exiting surface is 0.02 to 0.8, and the width of each microstructure is relatively good between 80 µm and 250 µm.

The relationship between the reflecting layer thickness Rh and the depth H2 of the microstructure of the reflecting surface is between 0.02 < Rh (1 / H2) < 0.8, thus having both reflection and light guiding effects.

(5) Relationship between light guide effect and thickness of the microstructure reflective layer 11 (lower layer) of the present invention:

In the embodiment of the light guiding device 1 having the microphone structure of the present invention, the relationship between the thickness of the reflecting layer 11 microstructure and the amount of light incident can be obtained. In other words, the thickness of the reflective layer 11 is not greater than 1/10 of the total body thickness (sum of the thicknesses of the light emitting layer 13, the light guide layer 12, and the reflective layer 11).

(6) Relationship between microstructure reflective layer thickness (lower layer) and microstructure depth of the present invention:

Referring to Fig. 6, this is a luminance relationship curve diagram of a light guide device having a microstructure of the present invention. The biaxial relationship data in this curve is as follows. The vertical axis reflects the luminance of the entire microstructure formation, that is, the luminance value measured at the light exit surface, and the horizontal axis is the reflection layer microstructure obtained by multiplying the thickness Rh of the reflection layer by an inverse of the depth of the microstructure of the reflection surface (1 / H2). Is the relationship between thickness and depth.

Accordingly, it can be seen from FIG. 6 that different reflecting layer thicknesses and micro structure depth ratios affect the brightness of the light exit surface. When the Rh (1 / H2) value is 0.02 <Rh (1 / H2) <0.8, this range has both reflection and light guiding effect at the same time, and the reflectivity of the reflecting layer is about 80%. When the low or uniform effect is poor and the Rh (1 / H2) value is further increased and the optimum range is 0.02 < Rh (1 / H2) < 0.5, the light guide device having the microstructure of the present invention further shows high luminance on the light emitting surface. The optical quality of reflection and spectroscopy.

(7) Relationship between the thickness, concentration and uniformity of the spectral layer 13 of the present invention:

Among the embodiments of the light guide device 1 having the microstructure of the present invention, the relationship between the thickness, concentration and uniformity of the spectral layer 13 and the light guide layer 12 is as follows.

(1) A small amount of diffusing particles is added to the light guide plate 12 to solve a phenomenon in which bright bands and uniformity are not good.

(2) The smaller the diameter of the diffusion molecule is, the narrower the distribution penetrating into the same is.

(3) The larger the diameter of the diffusion molecule is, the wider the distribution that penetrates into the same is.

(4) It depends on the difference in refractive index and required concentration, and depends on the size of the particle diameter and the required concentration.

The light guide device 1 having the microstructure of the present invention can solve the problem of uneven bright band and uniformity by adding a small amount of diffusion molecules to the light guide layer 12 and improves the light utilization rate. The difference between the refractive index of the diffusing molecule and the plastic substrate, which is the material of the light guide layer 12,

Maintain high penetration rates when in range. In addition, the diameter of the diffusion molecule in the light guide layer 12 is between 2 μm and 10 μm, and the refractive index of the light guide layer 12 itself is between 1.42 and 1.63.

Among them, the thickness ratio of the spectral layer 13 and the light guide layer 12 of the present invention, the concentration, luminance and uniformity of the spectral layer 13 and the diffusion molecules are related.

Among the light guide devices 1 having the microstructure of the present invention, factors affecting the shape of the light guide layer 12 and the roughness of the spectral layer 13 are as follows.

(1) It helps to raise the brightness value of the light guide plate when the surface (light emitting surface) 132 of the spectral layer 13 is not flat (that is, when there is a rough surface).

(2) Roughness of the surface (light emitting surface) 132 of the spectral layer 13 depends on the change in the microstructure of the reflective surface of the reflective layer 11.

Roughness of the surface of the spectral layer 13 (light emitting surface 132) Advantages: (1) Increase the brightness of the light guide plate, (2) solve the bright band problem, (3) improve the uniformity

Therefore, among the relationship between the roughness Ra of the light exit surface 132 of the spectral layer 13 and the brightness L, the best luminance is shown when the roughness is 1 µm to 6 µm.

(8) Embodiments of other embodiments of the specific structure of the light guide device body having the microstructure of the present invention:

In the light guide device 1 having the microstructure of the present invention, the diffusing particles 131 may not be added to the spectral layer 13, and the upper surface (light output surface 132) of the spectral layer 13 is a mirror plane. There are various aspects, such as a fog surface, a continuity microstructure, a discontinuous microstructure for single side incident light design, and a discontinuous microstructure for bilateral incident light design. At the same time, the diffusion molecule 122 may or may not be added to the light guide layer 12. At the same time, the contact surface (reflection surface 112) of the quantum reflection layer 11 and the light guide layer 12 also has a mirror plane, a fog plane, a microstructure with continuity, a discontinuous microstructure with a single side incident light design, and a discontinuity with a double side light incident design. There are various aspects such as a microstructure. Accordingly, the reflective layer 11 of the light guide device 1 having the microstructure of the present invention as shown in FIG. 7 after cross-combining the reflective layer 11 and the light guide layer 12 and the spectral layer 13 of various other designs described above is shown. In the structure of the light guide layer 12 and the spectral layer 13, various embodiments can be obtained. For example, four structural diagrams 411, 412, 413, and 414 shown in order from top to bottom in FIG. 7 each have diffused particles in the spectral layer (FIGS. 411, 412) or do not have diffused particles. (FIGS. 412, 414), the four structural diagrams of which the upper surface of the spectral layer (light emitting surface 4111, 4121, 4131, 4141) of (FIG. 411, 412, 413, 414) are all structural structures with continuity. The contact surfaces (reflective surfaces 4112, 4122, 4132, and 4142) of both the light guide layer and the light guide layer are four embodiments of the plane (mirror surface or fog surface) (in the case of Figures 411 and 413, the diffusion molecules in the light guide layer). However, there are no examples of Figs. 412 and 414.) The four structural diagrams 421, 422, 413 and 424 in Fig. 42 show diffused particles and diffused particles in the spectral layer, respectively (Fig. 421 and 422). (4, 4, 1, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4) Surface) and the contact surfaces of both the reflective layer and the light guide layer (reflective surfaces 4212, 4222, 4232, 4242) are four embodiments of the discontinuous microstructure of the double-layered light incidence design. Both the light exiting surface and the reflecting surface are arranged in the direction of the micro structure provided on the light exit surface and the direction of the micro structure installed on the reflecting surface, in each embodiment of the micro structure (whether continuous, discontinuous, single-sided or bilateral incident design). Are array directions of parallel or frontal crosses.

The structure of the other light exiting surface and the reflecting surface of the light guide device 1 having the microstructure of the present invention can be designed in various combinations, and the specific structure design of the micro structure installed on the light exiting surface and / or the reflecting surface can also be designed. There are many other embodiments. For example, the embodiment illustrated in FIG. 8A to FIG. 8O will be described below one by one.

8A is a first embodiment of a microstructure on a light guide device 1 having a microstructure of the present invention, wherein the microstructures provided on the light exiting surface and / or the reflecting surface are arranged in a number of narrow, long, and parallel arrangements. Continuum triangle bar microstructure 801.

8B is a second embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, in which the microstructures provided on the light exiting surface and / or the reflecting surface are arranged in a plurality of narrow, long and parallel arranged continuities. It is a semi-rod-shaped microstructure 802.

8C is a third embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructures provided on the light exiting surface and / or the reflecting surface are three-dimensional continuity curves of a plurality of matrix arrays. Pyramid) microstructure 803.

8d is a fourth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructures provided on the light exiting surface and / or the reflecting surface are three-dimensional continuous spherical microstructures of a plurality of matrix arrangements. Structure 804.

8E is a fifth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructures provided on the light exiting surface and / or the reflecting surface are three-dimensional continuous arcs of a plurality of matrix arrangements. It is a weight micro structure 805.

Illustrated in FIG. 8F is a sixth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructures provided on the light exiting surface and / or the reflecting surface have a plurality of narrow, long and parallel arrangements. It is a continuous three-dimensional triangular bar shape, and the different three-dimensional triangular bar-shapes are boiled and microstructure 806 of controllable density distribution changes that are gradually densified from both sides to the middle.

(Especially suitable for bilateral light incident, that is, both left and right sides of the light guide layer are designed as light incident surfaces.)

8G is a seventh embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface has a plurality of narrow and long parallel array ratios. It is a microstructure (807) of continuous three-dimensional triangle bar shape and equidistant density change.

8H is an eighth embodiment of the microstructure on the light guiding device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface has a plurality of narrow and long parallel array ratios. A continuous three-dimensional semi-rod bar, a gap between these three-dimensional semi-rods, is a microstructure 808 of controllable density distribution changes that boils and gradually densifies from side to side.

(Especially suitable for bilateral light incident, ie, the left and right sides of the light guide layer are all designed as light incident surfaces.)

8i is a ninth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface has a ratio of a plurality of narrow and long parallel arrays. It is a microstructure 809 of continuous three-dimensional semi-rod bar shape and equidistant density change.

8J is a tenth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface is a discontinuous contour of a plurality of matrix arrays. (Pyramids), these dissimilar discontinuities between different discontinuities, are microstructures 810 of controllable density distribution changes that are boiling and become more dense from both sides to the middle.

(Especially suitable for bilateral light incident, that is, both the left and right sides of the light guide layer have a light incident surface design)

8k is an eleventh embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface has a plurality of narrow and long parallel arrays. Is a discontinuous pyramid (pyramid), a microstructure 811 of equidistant density change.

 Illustrated in FIG. 8L is a twelfth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface is a discontinuous three-dimensional structure of a plurality of matrix arrays. The spherical microstructure, between these discontinuous three-dimensional spherical microstructures, is a boiling distance, a controllable density variation microstructure 812 that is densely packed from both sides to the middle.

(Especially suitable for bilateral incident light, that is, both left and right sides of the light guide layer are designed as light incident surfaces.)

8M is a thirteenth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface is a discontinuous three-dimensional structure of a plurality of matrix arrays. Spherical microstructure, microstructure 813 of equidistant density variation.

8N is a fourteenth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface is a discontinuous arc of a plurality of matrix arrays. Shaped Conical Microstructure, This arc shaped conical microstructure is a boiling distance, controllable density change microstructure 814 that comes closer to the middle from both sides.

(Especially, the right and left sides of the light guide layer suitable for bilateral light incident are designed as light incident surfaces)

8o is a fifteenth embodiment of the microstructure on the light guide device 1 having the microstructure of the present invention, wherein the microstructure provided on the light exiting surface or (or) the reflecting surface is a discontinuous arc of a plurality of matrix arrangements. Shape microstructure, microstructure 815 of equidistant density variation.

9, this is another embodiment of the light guide device 1a having the microstructure of the present invention. In this embodiment, the light emitting surface 132a which is the upper surface of the spectral layer 13a of the light guide device 1a having this microstructure, and the reflective surface 112a between the reflective layer 11a and the light guide layer 12a, respectively. Install the micro structure. Among them, the microstructure 114 provided on the light exiting surface 132a and the reflecting surface 112a is both discontinuous and the microstructure on the reflecting surface 112a is not only discontinuous but also a microstructure having a density change. In addition, the non-continuous, density-changing microstructure of the reflecting surface (112a), the distance between two neighboring microstructures on the reflecting surface (112a) closest to the light incident surface 15, the largest G, the light incident surface (15) The distance G between two neighboring microstructures 124 of the reflecting surface 112a far away from) becomes smaller. The farther away from the light incident surface 15 through the controllable density change installed on the reflecting surface 112a, the smaller the gap G becomes (the more densely) the micro structure, the more uniform the light output and the closer the light incident surface 15 is, It is possible to avoid the phenomenon of becoming brighter and darker as it is farther away, and the light exit surface 132a when the numerical value of the structure interval G of the discontinuous microstructure provided in the reflective surface 112a is in the best range between 0 and 1.4 mm. After combining the at least one optical film 590 in combination with each other, a bright line phenomenon (a bright line is not visible) does not appear on the light exit surface 132a. By providing a microstructure with a discontinuously controllable density change, a similar light uniformity effect can be achieved, and at least one optical film 590 and a mouth on the light exit surface 132a of the light guide device 1a having the microstructure of the present invention. One on the optical surface 15 One light distribution module can be configured by installing the light source 2 and combining other conventionally known accessory parts, and then combining the light distribution module with the conventional liquid crystal panel 57 to form one liquid crystal monitor. .

Referring to Figures 10 and 11, which is an embodiment process diagram and schematic diagram of a common extrusion fabrication with a light guide device having a microstructure, respectively, according to the present invention. The manufacturing process is a common extrusion process of the light guide device 1a having the microstructure of the present invention having a three-layer structure integrally formed as illustrated in FIG. 9, for example, first of the reflective particles 111a respectively forming the reflective layer 11a. The plastic material is placed in the sub-extruder (1) material container 21 of the extruder, and the plastic material of the diffusing particles 122a of different particle diameters and different refractive indices forming the light guide layer 12a is placed in the main extruder of the extruder. (1) The plastic material of the diffuser particles 131a having different particle diameters and different refractive indices which are placed in the material container 22 to form the spectral layer 13a is subjected to the sub-extruder 2 of the extruder. ) Among them, the plastic material and the diffusion particles 122a and 131a used in the light guide layer 12a and the spectral layer 13a may be the same or different materials. Subsequently, the plastic materials in the material containers 21, 22, and 23 are respectively smelted through the spiral rods, and then placed in the main and sublayers of the extrusion die T Die 25. Then, the rollers of R1, R2 and R3 sets are again pressed and molded, and thus, the all-in-one light guide device 1a of the integral molding is completed. Compared with the prior art, that is, compared with the prior art of coating one reflective layer on the surface under the light guide layer in a film-coated manner, the present invention clearly shows the convenience and progress in the manufacturing process.

Referring to FIG. 12, the present invention is a schematic diagram of a jetting process of a rough surface on a light exit surface of a light guide device having a micro structure. In the present invention, to form a rough surface or a fog surface of the light-emitting surface of the light guide device having a micro structure, that is, in forming a rough surface or a fog surface of the upper surface of the light guide layer, the degree of the rough surface is the injection device 31 The injection pressure (p), the injection speed (v) and the injection (32) and the roller surface (33) distance (d) of the control is applied. Then, in the process of extruding together the roller surface 33 of the predetermined rough surface by the rollers R1, R2, and R3 illustrated in Fig. 11, the plastic sheet material extruded was molded and further extruded by the present inventors. A rough surface is extruded from the light guide device reflective surface and / or the light exit surface of the three-layer structure. The roughness of the rough surface affects the degree of electrostatic adsorption and the uniformity of the light guiding ability between the light exiting surface and the optical film fragment of the reflective spectrophotometer having the microstructure of the present invention, as shown in Table 2, for example.

<Relationship between roughness of light emitting surface and adsorption degree of optical film fragment> Example A Example B Example C Example D Example E d (mm) 220 220 220 220 220 p (MPa) 0.38 0.38 0.38 0.38 0.38 v (m / min) 15 12 8 4 One Roughness of light exit surface Ra (㎛) 0.07 0.46 1.35 2.21 2.52 Optical film piece adsorption degree Easy adsorption Relatively non-adsorbed No adsorption No adsorption No adsorption

In Table 2, when the roughness Ra of the rough surface formed on the light exit surface of the light guide device having the micro structure of the present invention is less than 0.46 µm, electrostatic adsorption phenomenon between the light exit surface of the light guide device having the micro structure and the optical film is serious. And scratch damage. If the roughness Ra is larger than 2.21㎛, the light extraction efficiency is increased, so that the light output of the light guide device having the micro structure may be reduced, and when the Ra is larger than 6㎛, the light output quality may not even pass quality control. There is. Therefore, in the present invention, it is possible to control the roughness of the rough surface formed on the light exit surface of the light guide device having the micro structure between 0.07 μm and 2.52 μm. Especially between 0.46 micrometers and 2.21 micrometers is favorable, and 1 micrometer is most preferable in 2.21 micrometer.

In the present invention, the light guide layer and the reflective layer are all selected from plastic materials currently known, for example, acrylic (polymethylmethacrylate: PMMA), polycarbonate (PC), polyethylene terephthalate (PET), It is not limited to MS. Diffusion particles added in the light guide layer may also be selected from currently known materials, for example, but not limited to PMMA fine particles, PC fine particles, PET fine particles, MS fine particles, and the like. Reflective particles are also selectable from the currently known materials, for example, but not limited to SiO 2 fine particles, TiO 2 fine particles and the like.

In the light guide device having the microstructure of the present invention, it is extruded and integrally molded together to increase the light utilization rate, reduce the light loss, and eliminate the need for the use of reflection fragments and the brightness increasing film (BEF) separately, and the simplified module. In addition to lowering the structure and cost of light distribution modules and reducing electrostatic adsorption of optical film fragments, the improvement of optical effects (light uniformity, brightness, quality, etc.) of light guide is also an important factor.

13a to 13b show an embodiment of the light guide device having the microstructure of the present invention and a corresponding curve between the light angle and the light brightness of the light emitting surface, wherein the X axis of the curve is the light angle and the light angle value of the light emitting surface. The range of 0 to 90 degrees, the Y axis is the brightness number. Taking the structure of the light guiding device 1b of the present invention illustrated in Fig. 13A as an example, the main body of the light guiding device 1b is a three-layer flat plate-like structure that is integrally extruded, which is a spectral layer 13b located at an upper layer, A light guide layer 12b positioned in the intermediate layer and a reflective layer 11b positioned in the lower layer to which reflective particles are added are included. One side of the light guiding layer 12b of the body of the light guiding device 1b is one light incidence surface 15, and a side light source 2 (CCFL or LED) is provided next to the light incidence surface 15 so that one light ( 20 is generated and the light 20 enters the light guide layer 12b of the light guide device 1b through the light incident surface 15. The surface where the light guide layer 12b and the reflective layer 11b are adjacent to each other (that is, the bottom surface of the light guide layer 12b or the top surface of the reflective layer 11b) is the reflective surface 112b and the reflective layer in the spectral layer 13b. The side surface away from (11b) (that is, the top surface of the spectral layer 13b) is one light emitting surface 132b. The light guide layer and the spectral layer may or may not be added with diffused particles. When both of their own plastic materials (containing diffusing particles therein) are the same, the light guiding device 1b is substantially the same as the two-layer structure of the pressure-integrating molding of the light guiding layer and the reflecting layer. In the embodiment of the light guiding apparatus 1b of the present invention, the material of the light guide layer and the spectral layer has the same material of its own plastic material (containing diffused particles therein) In this embodiment, the light incident surface 150 and the light emitting surface 121b are used. Are perpendicular to each other at any position of the light exit surface 121b. The characteristic of the reflective layer 11b is that when the light 20 is bent flat inside the light guide layer 12b and shines the reflective surface 112b, the light 20 is microscopic. The reflection angle 203 is reflected from the reflective surface 112b having the structure to reflect the light back to the light guide layer 12b, and the angle thereof changes, but the light 20 traveling inside the light guide layer 12b is reflected on the light exit surface 132b. When entering, the angle θ, which is the angle between the traveling direction of the light 20 and the normal line N of the light exit surface 132b, is different, and the reflection 201 or the light exit 202 has two different optical effects. The deciding factor of whether light 20 reflects or is emitted from the light exit surface is determined by the refractive index n of the light guide layer and the spectroscopic layer itself plastic material and the critical angle θc upon refraction to the outside air, where the critical angle is θc =. sin-1 (1 / n).

In the present embodiment, when the refractive index of the light guide layer (the same as the light emitting layer) is n = 1.58, substituting n = 1.58 into the formula can calculate the critical angle θc = 39.26 ° (about 40 °). In the case where the writing ratio of the light guiding layer (same as the light emitting layer) is n = 1.49, the critical angle θ c = 42.16 ° (about 42 °) can be calculated: the light 20 and the normal (N) shining on the light exit surface 132b. When the angle θ is smaller than the critical angle θc, the light 20 is emitted 202 and is emitted from the light exit surface 132b, and when the angle θ is larger than the critical angle θc, the light 20 is reflected 201. The light is reflected back to the light guide layer 12b.

13A is a structure of one embodiment of the light guiding apparatus 1b of the present invention, and the corresponding curve diagram between the light angle and the brightness of the light exit surface can be tested and shown in the drawing. Examples shown in Fig. 13B are a double layer structure (i.e., a light guide layer and a reflective layer, or when the spectral layer and the light guide layer plastic material are the same), and a three layer structure (spectral layer, light guide layer and Reflective Layer) Two kinds of light guide devices are tested and plotted in the drawing by testing the corresponding curves between the light angular angle and the light brightness of the light exit surface, as shown by the curve illustrated in Fig. 13B. The curve clearly shows that the light emitted from the light exit surface is the brightest in the inclination angle range of about 30 degrees to 50 degrees when the outgoing angle is inclined to the right of the vertical normal of 0 degrees and lacks different refractive indices. The visually appropriate zero-degree visual brightness is relatively low, but the depth-width of the microstructure on the appropriate reflecting surface, the refraction of the appropriate spectral and light guide layers The curve of the embodiment of the three-layer light guide device, which is designed with the ratio of the ratio of the thickness and the thickness ratio, clearly shows the light emitted from the light exit surface at the right time, so that the light exit surface is the brightest in the visual range of plus and minus 20 degrees, increasing the brightness of the light distribution module. .

Based on the above-described optical efficiency evaluation method, cross-combination is performed on reflecting surfaces of different microstructures with different width and depth ratios, spectral layers and light guide layers having different spectral layer refractive indices and different thickness ratios. According to the method illustrated in 13b, the brightness of the light emitting surface is simulated and the results are summarized in Table 3 below.

The test method of the light exit surface brightness described above is an embodiment schematic view of the light brightness of the light exit surface 132 of the light guide device 1 of the present invention illustrated in FIG. As illustrated in FIG. 14, the test zones of 13 different positions were selected in the light exit surface 132 range indicated by the upward direction. From the left side, the light source of the light guide device 1 of different structural design emits light and illuminates it, and then test the brightness of the light at regular time in 13 test zones on the light exit surface 132 of the light guide device 1 again. After taking the average value and summarized the brightness obtained by the test in Table 3 to Table 6 as follows.

<Light Brightness Statistics of Light Guide Devices with Microstructure Reflective Surfaces with Different Depth Widths, Refractive Index and Thickness Ratios of Different Spectral and Light Guide Layers> number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) One 0.5 1.58 radish 3 0 radish 2867 2 0.5 1.49 radish 3 0 radish 2932 3 0.5 1.58 1.46 2 One 2 1917 4 0.5 1.49 1.58 2 One 2 991.6 5 0.5 1.58 1.49 1.5 1.5 One 2271 6 0.5 1.49 1.58 1.5 1.5 One 1688 7 0.5 1.58 1.49 One 2 0.5 2600 8 0.5 1.49 1.58 One 2 0.5 2340 9 0.5 1.58 1.49 0.5 2.5 0.2 2909 10 0.5 1.49 1.58 0.5 2.5 0.2 2917 number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) 11 0.419 1.58 radish 3 0 radish 4598 12 0.419 1.49 radish 3 0 radish 4593 13 0.419 1.58 1.49 2 One 2 3249 14 0.419 1.49 1.58 2 One 2 3265 15 0.419 1.58 1.49 1.5 1.5 One 3699 16 0.419 1.49 1.58 1.5 1.5 One 3776 17 0.419 1.58 1.49 One 2 0.5 4123 18 0.419 1.49 1.58 One 2 0.5 4239 19 0.419 1.58 1.49 0.5 2.5 0.2 4551 20 0.419 1.49 1.58 0.5 2.5 0.2 4625 21 0.419 1.58 1.49 0.3 2.7 0.11 4519 22 0.419 1.49 1.58 0.3 2.7 0.11 4632

number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) 23 0.319 1.58 radish 3 0 radish 4996 24 0.319 1.49 radish 3 0 radish 5318 25 0.319 1.58 1.49 2.9 0.1 29 2891 26 0.319 1.49 1.58 2.9 0.1 29 5609 27 0.319 1.58 1.49 2.5 0.5 5 2919 28 0.319 1.49 1.58 2.5 0.5 5 5634 29 0.319 1.58 1.49 2 One 2 3456 30 0.319 1.49 1.58 2 One 2 5459 31 0.319 1.58 1.49 1.5 1.5 One 4039 32 0.319 1.49 1.58 1.5 1.5 One 5321 33 0.319 1.58 1.49 One 2 0.5 4628 34 0.319 1.49 1.58 One 2 0.5 5130 number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) 35 0.288 1.58 radish 3 0 radish 4081 36 0.288 1.49 radish 3 0 radish 4495 37 0.288 1.58 1.49 2.9 0.1 29 2516 38 0.288 1.49 1.58 2.9 0.1 29 5735 39 0.288 1.58 1.49 2.7 0.3 9 2520 40 0.288 1.49 1.58 2.7 0.3 9 5750 41 0.288 1.58 1.49 2.6 0.4 6.5 2520 42 0.288 1.49 1.58 2.6 0.4 6.5 5755 43 0.288 1.58 1.49 2.5 0.5 5 2549 44 0.288 1.49 1.58 2.5 0.5 5 5751 45 0.288 1.58 1.49 2.3 0.7 3.29 2701 46 0.288 1.49 1.58 2.3 0.7 3.29 5592 47 0.288 1.58 1.49 2 One 2 2975 48 0.288 1.49 1.58 2 One 2 5326 49 0.288 1.58 1.49 1.5 1.5 One 3342 50 0.288 1.49 1.58 1.5 1.5 One 4900 51 0.288 1.58 1.49 One 2 0.5 3922 52 0.288 1.49 1.58 One 2 0.5 4470

number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) 53 0.233 1.58 radish 3 0 radish 2267 54 0.233 1.49 radish 3 0 radish 2576 55 0.233 1.58 1.49 2.9 0.1 29 1352 56 0.233 1.49 1.58 2.9 0.1 29 4301 57 0.233 1.58 1.49 2.5 0.5 5 1383 58 0.233 1.49 1.58 2.5 0.5 5 4283 59 0.233 1.58 1.49 2 One 2 1648 60 0.233 1.49 1.58 2 One 2 3813 61 0.233 1.58 1.49 1.5 1.5 One 1941 62 0.233 1.49 1.58 1.5 1.5 One 3818 63 0.233 1.58 1.49 One 2 0.5 2239 64 0.233 1.49 1.58 One 2 0.5 2783 number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) 65 0.2 1.58 radish 3 0 radish 2266 66 0.2 1.49 radish 3 0 radish 2182 67 0.2 1.58 1.49 2.9 0.1 29 815.2 68 0.2 1.49 1.58 2.9 0.1 29 2576 69 0.2 1.58 1.49 2.5 0.5 5 853.5 70 0.2 1.49 1.58 2.5 0.5 5 2534 71 0.2 1.58 1.49 2 One 2 1209 72 0.2 1.49 1.58 2 One 2 2553 73 0.2 1.58 1.49 1.5 1.5 One 1560 74 0.2 1.49 1.58 1.5 1.5 One 2511 75 0.2 1.58 1.49 One 2 0.5 1874 76 0.2 1.49 1.58 One 2 0.5 2436 77 0.2 1.58 1.49 0.5 2.5 0.2 2135 78 0.2 1.49 1.58 0.5 2.5 0.2 2361

number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) 79 0.181 1.58 radish 3 0 radish 2512 80 0.181 1.49 radish 3 0 radish 2399 81 0.181 1.58 1.49 2 One 2 1254 82 0.181 1.49 1.58 2 One 2 2313 83 0.181 1.58 1.49 1.5 1.5 One 1655 84 0.181 1.49 1.58 1.5 1.5 One 2433 85 0.181 1.58 1.49 One 2 0.5 2038 86 0.181 1.49 1.58 One 2 0.5 2513 87 0.181 1.58 1.49 0.7 2.3 0.3 2245 88 0.181 1.49 1.58 0.7 2.3 0.3 2559 89 0.181 1.58 1.49 0.5 2.5 0.2 2352 90 0.181 1.49 1.58 0.5 2.5 0.2 2606 91 0.181 1.58 1.49 0.3 2.7 0.11 2365 92 0.181 1.49 1.58 0.3 2.7 0.11 2541 number Structure Depth Width n1 n2 t1 (mm) t2 (mm) t1 / t2 Light brightness (nits) 93 0.134 1.58 radish 3 0 radish 1739 94 0.134 1.49 radish 3 0 radish 1601 95 0.134 1.58 1.49 2 One 2 1106 96 0.134 1.49 1.58 2 One 2 1468 97 0.134 1.58 1.49 1.5 1.5 One 1259 98 0.134 1.49 1.58 1.5 1.5 One 1562 99 0.134 1.58 1.49 One 2 0.5 1417 100 0.134 1.49 1.58 One 2 0.5 1644

In Tables 3 to 6, the numerical values in the "structure depth width" column indicate the ratio values of the depth (H2) and the width (P2) of the microstructure of the reflective surface (that is, the upper surface of the reflective layer) of the light guide plate. The numerical value in the column is the refractive index value of the spectral layer, the numerical value in the “n2” column is the refractive index value of the light guide layer, the numerical value in the “t1” column is the thickness value of the spectral layer, and the numerical value in the “t2” column is the thickness of the light guide layer. The numerical value in the "t1 / t2" column is the thickness comparison value of both the spectral layer and the light guide layer, and the numerical value in the "light brightness" column is the average value of the light brightness of 13 zones of the light exit surface obtained by the measurement performed in FIG.

)As can be seen by comparing the light brightness obtained in the examples of numbers 11 to 64 of Table 3 with those of the other embodiments, the depth and width ratio (H2 / P2) of the reflecting surface is between 0.233 and 0.419 (i.e.,

)

Have relatively good light brightness. In addition, the light brightness of the embodiment of n1 <n2 is also better than that of n2> n1. Also, as can be seen from the light brightness obtained in Example 23 to 78 in Table 3, the thickness when the depth and width ratio (H2 / P2) of the reflecting surface is between 0.2 and 0.319 (with appropriate spectral and light guide layers) The percentage range is

The light guide device of the three-layer structure inside shows higher light brightness than the light guide device of the two-layer structure (light guide layer thickness 0). In addition, the light brightness of the three-layer light guide device is even 67% higher than that of the two-layer light guide device. (For example, comparing the light brightness values of the two embodiments of No. 54 and No. 56) The curve of the three-layer light guide device illustrated in Fig. 13B is a curve obtained based on the three-layer structure of the No. 42 embodiment. Light brightness reaches 5755 nits.

Referring to FIGS. 15A, 15B, and 15C, this illustrates a different embodiment of the reflection surface depth width H2 / P2 in the light guiding apparatus of the present invention for the light reflection effect, respectively.

15A shows that when the depth width H2 / P2 of the reflecting surface 112c is too small, the light beam 20 reflects through the reflecting surface 112c microstructure of the reflecting layer 11c, and then the light beam is dashed in the dashed angle direction. When it is out of the right time, the light brightness measured at the light emitting surface 132c becomes relatively low, and therefore, the range of H2 / P2 is best when not less than 0.134, that is, the following formula should be met.

15B has the following result when the refractive index of the spectral layer 13d is smaller than the refractive index of the light guide layer 12d (n1 <n2), for example, when n1 = 1.49 and n2 = 1.58.

As a result, the light is directed through the structure of the reflective layer 11d and then emitted directly to the light exiting surface 132d to emit light. Is conducted again, and the light energy is lost to obtain a relatively high light brightness of the light exit surface 132d.

15C shows that when the depth width H2 / P2 of the reflecting surface 112e is too large, the light beam 20e passes through the microstructure of the reflecting surface 112e of the reflecting layer 11e, and then the light beam 20e receives the light incident surface ( 15) It is best to incline in the direction of the side, and when it is outside the right time, the brightness of the light is too low so that the range of H2 / P2 is not larger than 0.5, that is, the following equation is met.

As can be seen from the above equation, when the reflecting surface microstructure of the light guiding apparatus of the present invention meets the following formula, it shows a relatively high light output surface brightness.

Among them, P2 value is best between 80µm and 250µm. If it is smaller than 80µm, the molding rate of micro structure is lowered by roller extrusion in common extrusion process. This happens.

The above-described embodiments do not limit the scope of application of the present invention, and the scope of protection of the present invention is a range that is included in both the spirit of technology and equivalent changes thereto, which are defined in the scope of the scope of the present application. In other words, even if any equivalent changes and modifications are applied in the scope of the present invention, the meaning of the present invention is still considered, which belongs to the spirit and scope of the present invention, and thus all of them are regarded as advanced embodiments of the present invention. To reveal.

1, 1a, 1b: Light guide device with micro structure
11, 11a, 11b, 11c, 11d, 11e: reflective layer
111, 111a: reflective particles
112, 112a, 112b, 112c, 112d, 112e: reflecting surface
12, 12a, 12b, 12c, 12d, 12e: light guide layer
122, 122a: Diffusion molecule
13, 13a, 13b, 13c, 13d, 13e: light emitting layer
131, 131a: diffuse particles
132, 132a, 132b, 132c, 132d, and 132e
15: Light incident surface 2: Light source
20, 20c, 20d, 20e: light
201, 203: reflection 202: light output
21, 22, 23: material container 24: smelting the spiral rod
25: Extrusion frame R1, R2, R3: Roller
31: injection device 32: injection mouth
33: roller surface 41, 42: column
411, 412, 413, 414, 421, 422, 423, 424: degrees
4111, 4121, 4131, 4141, 4211, 4221, 4231, 4241: exit surface
4112, 4122, 4132, 4142, 4212, 4222, 4232, 4242: reflective surface
5: light distribution module 50: light source module
51: circuit board 520; Light plate
523: plane of light injection 524: reflector
54: half-light layer 55: rhombic lens module
56: diffusion film 57: liquid crystal face plate
581: Light 582: Brightest Area
583: next lighter zone 584: relatively darker zone
590: optical film 801 to 815: microstructure

Claims (10)

A light guide device having a micro structure used in combination with a light source,
A light guide layer including a light incident surface and receiving light from the light source through the light incident surface;
A reflection layer reflecting the light to return the light directed from the light guide layer to the reflection layer back to the light guide layer; And
A spectral layer formed on an upper side of the light guide layer opposite to the reflective layer and including a light exit surface from which the light received from the light guide layer exits,
The light guide layer is located between the reflective layer and the spectral layer, the light exit surface and the light exit surface are perpendicular, and at least a portion of the light in the light guide layer exits the light exit surface,
The reflective layer, the light guide layer, and the spectroscopic layer are integrally formed and extruded together, an air contact surface is not interposed between the reflective layer and the light guide layer, a reflective surface is defined between the light guide layer and the reflective layer, and the half Light guide device with three-dimensional micro structure installed on the slope. The method of claim 1,
The light exit surface is provided with a micro structure separate from the micro structure provided on the reflective surface, and (depth / width) of the micro structure of the reflective surface is

And

Wherein H2 is the depth of the microstructure of the reflective surface, P2 is the width of the microstructure of the reflective surface, n1 is the refractive index of the spectral layer, and n2 is the refractive index of the light guide layer. The method of claim 2,
The light guide device

,
The P2 value is between 80 μm and 250 μm, and the depth width ratio (H2 / P2) value of the reflecting surface is between 0.2 and 0.319, and the ratio range of the thickness t1 of the spectral layer and the thickness of the light guide layer t2 is

And
The microstructure of the reflecting surface is a non-continuous microstructure, the value of G, which is the interval between adjacent microstructures, satisfies any one between 0 and 1.4 mm. The method of claim 2,
The light guide device includes at least one or more of the following items, wherein the item adds a plurality of diffused particles to the light guide layer, adds a plurality of diffused particles to the spectroscopic layer, and installs a three-dimensional microstructure on the light exit surface. And mixing two plastic materials of different refractive indices in the reflective layer, adding a plurality of reflective particles to the reflective layer and forming a coarse face or a fog face of controllable density distribution on the light exit surface. The method of claim 4, wherein
When a plurality of diffused particles are added to the light guide layer, a numerical value of Δn, which is a refractive index difference between the diffused particles in the light guide layer and the plastic substrate itself, is between 0.04 <Δn <0.1, and the particle diameter of the diffused particles in the light guide layer is Is between 2 μm and 10 μm, and the refractive index of the light guide layer itself plastic substrate is between 1.42-1.63,
When a plurality of diffused particles are added to the spectral layer, the value of Δn, which is the difference in refractive index between the diffused particles in the spectral layer and the plastic base material of the spectral layer itself, is between 0.04 <Δn <0.1, and the diffused particles in the spectral layer Has a particle diameter of between 2 μm and 10 μm, and the refractive index of the spectral layer itself plastic substrate is 1.42-1.63,
When two plastic materials having different refractive indices are mixed in the reflective layer, the mixing ratio is 7: 3,
When the plurality of reflective particles are added to the reflective layer, the refractive index of the reflective particles is 2.2 to 3.2, the concentration of addition is less than 0.5% by weight, the diameter of the reflective particles is between 4-50 μm, The refractive index is between 1.6-2.5, the refractive index difference between the reflective layer and the light guide layer is between 0.05-1,
A light guide device having a roughness of the light exiting surface when Ra has a rough surface on the light exit surface, between 1 µm <Ra <6 µm. The method of claim 4, wherein
When the light exit surface has a rough surface, the numerical value of Ra, which is the roughness of the light exit surface, is 1 µm <Ra <2.21 µm. The method of claim 2,
And a three-dimensional micro structure is provided in the light exit surface micro structure, and the arrangement direction of the micro structure of the light exit surface and the array direction of the reflecting surface micro structure are any one of an alignment direction parallel or front to each other. The method of claim 7, wherein
The microstructure of the light exiting surface and the microstructure of the reflecting surface may be any one of the following items, wherein the items are a plurality of narrow, long and parallel arranged continuous triangular bar-shaped microstructures, a plurality of narrow, long and parallel arranged Continuous semi-barbed microstructures, three-dimensional continuity spherical microstructures of multiple matrix arrays, three-dimensional continuity spherical microstructures of multiple matrix arrays, three-dimensional continuity arc-like microstructures of multiple matrix arrays, many narrow, long and parallel An array of discontinuous three-dimensional triangular rods, wherein the different triangular triangular shapes are boiling distances and microstructures of controllable density distribution changes gradually densely from both sides to the middle, and a plurality of narrow and long parallel discontinuous three-dimensional triangle rods. Shape and said each other Other three-dimensional triangular rods are microstructures of equidistant density changes, a number of narrow, long parallel arrays of non-continuous three-dimensional semi-rods, and the different three-dimensional semi-rods are boiled and controllable density distribution gradually densified from both sides to the middle. Microstructure of change, multiple narrow and parallel arrays of discontinuous three-dimensional semi-rods, microstructure of equidistant density change, discontinuousness of multiple matrix arrangements, and the different weights are boiling and come from both sides to the middle Microstructure of increasingly densely controllable density distribution variation, multiple narrow and long parallel array discontinuities, microstructure of equidistant density variation, discontinuous three-dimensional spherical microstructure of multiple matrix arrays, and different spherical microstructures Is the boiling distance, and on both sides is It is a microstructure of controllable density change gradually becoming more dense, discontinuous three-dimensional spherical microstructure of multiple matrix arrangements, microstructure of equidistant density change, discontinuous arc-shaped microstructure of multiple matrix arrangements, A light guide device which is an arc-shaped cone-shaped microstructure, which is boiling, a controllable density-variable microstructure densely concentrated on both sides, and a discontinuous arc-shaped cone microstructure of a plurality of matrix arrangements, and a microstructure of an equidistant density change. A light distribution device comprising a light guiding device,
Photometric source;
A light guide layer including a light incident surface and receiving light from the light source through the light incident surface;
A reflection layer reflecting the light to return the light directed from the light guide layer to the reflection layer back to the light guide layer; And
A spectral layer formed on an upper side of the light guide layer opposite to the reflective layer and including a light exit surface from which the light received from the light guide layer exits,
The light guide layer is located between the reflective layer and the spectral layer, the light exit surface and the light exit surface are perpendicular, and at least a portion of the light in the light guide layer exits the light exit surface,
The reflective layer, the light guide layer, and the spectroscopic layer are integrally formed and extruded together, an air contact surface is not interposed between the reflective layer and the light guide layer, a reflective surface is defined between the light guide layer and the reflective layer, and the half The slope is equipped with a three-dimensional microstructure,
The depth width information value of the micro structure of the reflective surface is

And

Wherein H2 is the depth of the microstructure of the reflective surface, P2 is the width of the microstructure of the reflective surface, n1 is the refractive index of the spectral layer, and n2 is the refractive index of the light guide layer. A liquid crystal monitor comprising a light guide device,
Photometric source;
A light guide layer including a light incident surface and receiving light from the light source through the light incident surface;
A reflection layer reflecting the light to return the light directed from the light guide layer to the reflection layer back to the light guide layer;
A spectral layer formed on an upper side of the light guide layer opposite to the reflective layer and including a light exit surface through which the light received from the light guide layer is emitted;
An optical film covered by the light exit surface; And
It includes a liquid crystal panel located on the side of the light guide layer spaced apart from the optical film,
The light guide layer is located between the reflective layer and the spectral layer, the light exit surface and the light exit surface are perpendicular, and at least a portion of the light in the light guide layer exits the light exit surface,
The reflective layer, the light guide layer, and the spectroscopic layer are integrally formed and extruded together, an air contact surface is not interposed between the reflective layer and the light guide layer, a reflective surface is defined between the light guide layer and the reflective layer, and the half The slope is equipped with a three-dimensional microstructure,
The depth width information value of the micro structure of the reflective surface is

And

Wherein H2 is the depth of the microstructure of the reflecting surface, P2 is the width of the microstructure of the reflecting surface, n1 is the refractive index of the spectral layer, and n2 is the refractive index of the light guide layer.

Images