CN203324502U - Light guide plate with microstructure - Google Patents

Abstract

A light guide plate with microstructures comprises a light guide plate and a plurality of microstructures, wherein the light guide plate is provided with a wedge-shaped light incoming part and a plate-shaped light guide part, the microstructures can be formed on an inclined plane of the wedge-shaped light incoming part by adopting a machining technology or an injection molding technology, and the inclined plane can be used for an LED light source to inject light. Therefore, the thin light guide plate or the light guide plate with the thickness smaller than that of the light source is manufactured, so that light can generate diffusion effect through the microstructure, and the light can be uniformly emitted after being transmitted and reflected in the light guide plate, thereby achieving the purpose of improving the brightness and the uniformity of the light guide plate.

Description

Light guide plate with microstructure

technical field

The utility model relates to a structure of a light guide plate, in particular to a light guide plate with a microstructure; more particularly to a wedge-shaped light-incident structure of a light guide plate with a microstructure, so that the light passes through to produce a diffusion effect, so as to improve Brightness uniformity of the light guide plate.

Background technique

In response to the needs of the market, the backlight module emphasizes lightweight, thin, narrow frame, low power consumption, high brightness and low cost in development and design. In contrast, the backlight module is responsible for turning the line light source into a The light guide plate on the bright side has also begun to focus on the design of the microstructure and the improvement of the thinner body.

Existing light guide plates with microstructures, for example: China Taiwan Announcement No. I266120 "Backlight Device and Liquid Crystal Display" invention patent, which discloses a liquid crystal display including a liquid crystal panel and a backlight device. The backlight device includes a light guide plate and a plurality of point light sources. The light guide plate includes an incident surface with a plurality of triangular grooves and a light output surface connected to the incident surface. The plurality of point light sources are arranged relative to the incident surface, and each point light source corresponds to Each triangular groove. The light beam emitted from the point light source passes through the plurality of triangular grooves to enlarge the divergence angle and then enters the light guide plate to reduce the dark band. The liquid crystal panel is arranged adjacent to the light emitting surface of the light guide plate.

Another existing light guide plate with microstructure, for example: China Taiwan Announcement No. M453166 "Light Guide Plate Structure Improvement" new patent, which discloses that a light guide plate is provided with multiple microstructures on at least one side, and each microstructure is recessed in the light guide plate. In the light plate, or the microstructures protrude from the light guide plate, and the depths of the microstructures are different.

Another existing light guide plate with microstructure, for example: China Taiwan Announcement No. I373642 "Light Guide Plate and Backlight Module Using the Light Guide Plate" invention patent, which discloses a backlight module with a light emitting element and a light guide plate. The light guide plate has a light incident surface, and the light-emitting element is arranged corresponding to the light incident surface of the light guide plate to provide light entering the light guide plate from the light incident surface, and the light travels in the light guide plate to provide a uniform luminous effect. A plurality of microstructures are arranged on the light incident surface, each microstructure has a microstructure depth, and the light guide plate has a plate body thickness, and the ratio of the microstructure depth to the plate body thickness is substantially between 0.003 and 0.0625.

Another existing light guide plate with microstructure, for example: China Taiwan Publication No. 201044037 "Light Guide Plate and Backlight Module" invention patent, which discloses a light guide plate, which includes a light incident surface and is connected to the light incident surface The light-emitting surface, the light-incident surface is provided with a plurality of V-shaped grooves recessed into the light-incidence surface, there is a Fresnel lens between adjacent V-shaped grooves, and the extending direction of the V-shaped grooves is perpendicular to the Describe the bright side.

Another existing light guide plate with microstructure, for example: China Taiwan Publication No. 201209483 "Backlight Module and Display Device with the Backlight Module" invention patent, which discloses a backlight module, which includes a light guide plate, At least one first light source and at least one second light source. At least one first light incident surface and at least one second light incident surface are distributed alternately on a light incident side of the light guide plate, and the first light incident surface and the second light incident surface form an included angle. The first light source is arranged at a position adjacent to the first light incident surface and the light beam emitted by the first light source is suitable for traveling toward the left half of the light guide plate, the second light source is arranged at a position adjacent to the second light incident surface and the light beam emitted by the second light source The light beam is suitable to travel toward the right half of the light guide plate, and the first light source and the second light source alternately turn on and off.

Another existing light guide plate with microstructure, for example: China Taiwan Announcement No. I384296 "Light Source Module and Display Module" invention patent, which discloses a light source module, which includes a light guide plate and a light source. The light guide plate has a light incident surface and a light exit area, and the light guide plate has a plurality of grooves or raised patterns. The length of the groove or the raised pattern is less than that of the light guide plate. The light source is arranged on the light incident surface of the light guide plate, and the groove or raised pattern of the light guide plate is adjacent to the light incident surface.

Another existing light guide plate with microstructure, for example: China Taiwan Announcement No. I369546 "light guide plate microstructure" invention patent, which discloses that a light guide plate microstructure is arranged on at least one surface of the light guide plate, which includes a plurality of groove units are arranged continuously or discontinuously on the surface. The above-mentioned trench unit includes a plurality of trench structures. The two slopes of the plurality of groove structures form a plurality of included angles, each of which is between 80 degrees and 160 degrees, and the angles of the plurality of included angles are different from each other.

However, the existing light guide plates with microstructures of the aforementioned No. I266120, No. M453166, No. I373642, No. 201044037 and No. 201209483 are flat light guide plates, which are only convexly set on the light incident surface of the light guide plate 1' or The microstructure 2' is recessed, and the light source 3' adopts a side-entry type (as shown in Figure 1) to increase the light output efficiency of the light guide plate, but it is actually not suitable for a light guide plate with a wedge-shaped light incident structure, and cannot reduce the The thickness of the light board. In addition, the existing light guide plates with microstructures of the aforementioned No. I384296 and No. I369546 are flat light guide plates, which only have microstructures 2'' protruding or concave on the upper surface or light-emitting surface of the light guide plate 1'', and The light source 3'' adopts a side entry type (as shown in Figure 2) to increase the light output efficiency of the light guide plate, but it is actually not suitable for a light guide plate with a wedge-shaped light incident structure, and the thickness of the light guide plate cannot be reduced. Therefore, it is still necessary to further improve the structure of the existing light guide plate with microstructure, so as to improve the structure of the light incident surface of the existing light guide plate, so that the light source can be guided through the light guide plate to achieve the best light output, and at the same time, the thickness of the light guide plate can be reduced. the goal of. The aforementioned patents are only for reference of the technical background of the present utility model and to illustrate the current state of technological development, and are not intended to limit the scope of the present utility model.

In view of this, the utility model provides a light guide plate with a microstructure in order to meet the above needs, which includes a light guide plate and several microstructures, and the light guide plate has a wedge-shaped light incident part and a flat plate light guide The microstructure is formed on the wedge-shaped light incident part by machining technology or injection molding technology, so as to solve the thickness problem of the existing light guide plate with microstructure.

Utility model content

The purpose of this utility model is to provide a light guide plate with a microstructure, which includes a light guide plate and several microstructures, and the light guide plate has a wedge-shaped light incident part and a flat plate light guide part, and the microstructure is formed by Machining technology or injection molding technology is formed on the wedge-shaped light incident part to make a thin light guide plate or a light guide plate smaller than the thickness of the light source, so that the light from the light source enters the light guide plate through the microstructure, so that the light produces a diffusion effect , so that the light is uniformly emitted after being transmitted and reflected in the light guide plate, so as to reduce the loss of the light source in the light guide plate and improve the light extraction efficiency of the light guide plate.

To achieve the above object, the utility model takes the following technical solutions:

The light guide plate with microstructure of the present invention comprises:

A light guide plate having a light incident portion and a light guide portion; and

Several microstructures are arranged on the light guide plate;

Wherein the light incident part has an inclined surface, and the microstructure is arranged on the inclined surface, and the inclined surface can allow an LED light source to inject light.

The microstructure in a preferred embodiment of the present invention is a V-shaped groove, a trapezoidal groove or an arc groove.

The microstructure of the preferred embodiment of the utility model is an A-shaped convex body, a trapezoidal convex body or an arc-shaped convex body.

In the preferred embodiment of the present invention, the microstructure is formed on the slope by using machining technology or injection molding technology.

The microstructures in the preferred embodiment of the present invention are arranged continuously or discontinuously.

In a preferred embodiment of the present invention, the extension direction of the microstructure is parallel to the longitudinal direction of the light guide plate, or there is an included angle between the extension direction of the microstructure and the longitudinal direction of the light guide plate in the horizontal direction.

In a preferred embodiment of the present invention, the thickness of the light incident portion decreases gradually along the inclination direction of the inclined surface, or the thickness of the light incident portion decreases stepwise along the inclination direction of the inclined surface.

The whole section or a part of the light incident part of the preferred embodiment of the utility model is a wedge-shaped light incident part.

The light guide part in a preferred embodiment of the present invention is a flat plate light guide part.

In a preferred embodiment of the present invention, the thickness of the light incident portion is smaller than that of the light guide portion, or the thickness of the light incident portion is smaller than that of the LED light source.

The beneficial effect of the utility model is: the utility model is made into a thin light guide plate or a light guide plate smaller than the thickness of the light source, so that the light can produce a diffusion effect through the microstructure, and the light can be uniformly emitted after being transmitted and reflected in the light guide plate, which can achieve an improvement. Brightness and uniformity of light guide plate.

Description of drawings

Figure 1: A schematic top view of an existing light guide plate with microstructures.

Figure 2: A schematic side view of an existing microstructured light guide plate.

FIG. 3 : A three-dimensional schematic diagram of a light guide plate with a microstructure according to the first preferred embodiment of the present invention.

FIG. 4 : A three-dimensional schematic diagram of a light guide plate with a microstructure combined with a light source according to the first preferred embodiment of the present invention.

Fig. 5: A schematic cross-sectional view of a light guide plate with a microstructure combined with a light source in the first preferred embodiment of the present invention.

FIG. 6A to FIG. 6F : Schematic diagrams of the microstructure morphology of the light guide plate with microstructure in the first preferred embodiment of the present invention.

FIG. 7 is a three-dimensional schematic diagram of a light guide plate with microstructures according to a second preferred embodiment of the present invention.

FIG. 8A to FIG. 8F : Schematic diagrams of the microstructure morphology of the light guide plate with microstructure according to the second preferred embodiment of the present invention.

Reference numerals: 1, 1', 1'': light guide plate; 11: light incident part; 111: slope; 12: light guide part; 2, 2', 2'': microstructure; 3, 3', 3 '': LED light source; D: thickness of light guide; D': thickness of light incident; D'': thickness of LED light source.

Detailed ways

In order to fully understand the utility model, preferred embodiments will be exemplified below and described in detail with the accompanying drawings, which are not intended to limit the utility model.

The light guide plate with microstructure in the preferred embodiment of the present invention can be widely used in backlight modules of electronic products with thinner, lighter and narrower borders, such as touch-sensitive mobile phones, notebook computers, tablet computers, and handheld games Machines and liquid crystal displays, etc., to reduce the thickness of the backlight module and increase the brightness of the backlight module, so that the product has the characteristics of light weight and high brightness, so as to meet the needs of consumers and enhance market competitiveness, but it is not To limit the scope of the present utility model.

Fig. 3 discloses a perspective view of a light guide plate with a microstructure in a preferred embodiment of the present invention; Fig. 4 discloses a perspective view of a light guide plate with a microstructure combined with a light source in a preferred embodiment of the present invention, which corresponds to that of Fig. 3 Schematic diagram; FIG. 5 discloses a cross-sectional schematic diagram of a light guide plate with a microstructure combined with a light source in a preferred embodiment of the present invention, which corresponds to the schematic diagram in FIG. 3 . Please refer to Fig. 3 to Fig. 5, the light guide plate with microstructure according to the first preferred embodiment of the present invention includes a light guide plate 1 and several microstructures 2, and the light guide plate 1 has a light incident part 11 and A light guide part 12, and the light incident part 11 has an inclined surface 111, and the inclined surface 111 can allow an LED light source 3 to inject light.

3 to 5, the extension direction of the microstructure 2 (dotted line in FIG. 3) is parallel to the longitudinal direction of the light guide plate 1, or the extension direction of the microstructure 2 is horizontal to the longitudinal direction of the light guide plate 1. There is an included angle in the direction (for example: 5° or other angles).

Please refer to FIG. 3 to FIG. 5 again, the thickness D' of the light incident portion 11 decreases gradually along the inclination direction of the inclined surface 111, or the thickness D' of the light incident portion 11 increases in steps along the inclination direction of the inclined surface 111. Formula (not shown) decreases, and the whole or part of the section of the light incident part 11 is a wedge-shaped surface, so the whole or part of the light incident part 11 is a wedge-shaped light incident part. In addition, the The light guide part 12 is adjacent to the light incident part 11, and the cross section of the light guide part 12 is a rectangular surface, so the light guide part 12 is a flat light guide part, and the thickness D' of the light guide part 11 [ That is, the vertical thickness) is smaller than the thickness D of the light guide part 12 and the thickness D'' of the LED light source 3, so that a thin light guide plate is made to achieve the purpose of light and thin light guide plate.

FIG. 6A to FIG. 6F are schematic diagrams showing the microstructure morphology of the light guide plate with microstructure according to the preferred embodiment of the present invention. Please refer to FIG. 3 and FIG. 6A to FIG. 6F, the microstructure 2 is formed on the inclined surface 111 of the light guide plate 1 by machining technology or injection molding technology, and the shape of the microstructure 2 can be selected from a V-shaped concave Groove, a trapezoidal groove, an arc groove or grooves of other shapes, and the microstructures 2 are discontinuously arranged on the slope 111 (as shown in Figure 6A, Figure 6C and Figure 6E ) or in a continuous arrangement (as shown in Figure 6B, Figure 6D and Figure 6F).

3 and 4 again, the LED light source 3 is adjacent to the slope 111, and the LED light source 3 is parallel to the slope 111. When the LED light source 3 illuminates, the LED light source 3 is on the light guide plate. 1 produces an illuminating surface (not marked), and the illuminating surface is coupled to the inclined surface 111, or the LED light source 3 adjusts the illuminating angle according to the inclined surface 111, so that the illuminating surface is coupled to the inclined surface 111, so that the LED light source 3 can fully enter the light guide plate 1 to avoid light energy loss of the LED light source 3 . In addition, when the light from the LED light source 3 enters the light incident part 11 through the microstructure 2, it will have a diffusion and conduction effect, so that the light from the LED light source 3 will be guided to the light guide part 12 to be reflected and then emitted uniformly. In this way, it can avoid The light of the LED light source 3 is directly and totally reflected to achieve the purpose of improving the light output efficiency and luminance of the light guide plate.

Fig. 7 discloses a three-dimensional schematic diagram of a light guide plate with a microstructure according to a second preferred embodiment of the present invention; Fig. 8A to Fig. 8F disclose a schematic view of the microstructure of a light guide plate with a microstructure according to a second preferred embodiment of the present invention Compared with the first embodiment, the microstructure 2 of the second preferred embodiment is protruded on the inclined surface 111, and the shape of the microstructure 2 can be selected from an A-shaped convex body, a trapezoidal convex body or An arc convex body or other shape convex body, and the microstructures 2 are discontinuously arranged on the slope 111 (as shown in Figures 8A, 8C and 8E) or continuously arranged (as shown in Figures 8B, 8D and 8F ﹞. The second preferred embodiment of the present invention is not intended to limit the scope of the present invention, and the rest of the components are compared with the first preferred embodiment, which are incorporated herein for reference and will not be described in detail.

The aforementioned preferred embodiments only illustrate the utility model and its technical characteristics, and the technology of this embodiment can still be properly implemented in various substantive equivalent modifications and/or replacements; therefore, the scope of rights of the utility model must be viewed The scope defined by the appended claims shall prevail.

Claims (10)

1. the light guide plate of a tool microstructure, is characterized in that, it comprises:

One light guide plate, it has a light in part and a light guide section; And

Several microstructures, it is arranged on this light guide plate;

Wherein this light in part has an inclined-plane, and this microstructure is arranged on this inclined-plane, and light can be injected for a LED light source in this inclined-plane.

2. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, described microstructure is a V-type groove, a ladder type groove or an arc groove.

3. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, described microstructure is an A type convex body, a ladder type convex body or a circular arc convex body.

4. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, described microstructure selects Machining Technology or injection molding technology to be formed on described inclined-plane.

5. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, described microstructure is continuous arrangement or discontinuous arrangement.

6. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, the bearing of trend of described microstructure be parallel to described light guide plate vertically, or there is in the horizontal direction an angle between the bearing of trend of described microstructure and described light guide plate vertical.

7. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, the thickness of described light in part is along with the vergence direction on described inclined-plane successively decreases, or the thickness of described light in part successively decreases with staged along with the vergence direction on described inclined-plane.

8. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, complete section of described light in part or a part of paragraph are a wedge type light in part.

9. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, described light guide section is a plate light guide section.

10. according to the light guide plate of tool microstructure claimed in claim 1, it is characterized in that, the thickness of described light in part is less than the thickness of described light guide section, or the thickness of described light in part is less than the thickness of described LED light source.

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