TWM508682U - Light guide bar - Google Patents

Description

Light guide strip structure

The present invention relates to a light guide strip structure, and more particularly to a light guide strip structure that can be used for a light box light source module.

A light guiding structure for a light box light source module, which has a plurality of light guiding strip bodies, the light guiding system having a light incident surface, a corresponding surface opposite to the light incident surface, and a connection The light surface and the light emitting surface between the corresponding surface and the reflecting surface. The reflecting surface usually has a plurality of scattering pattern units formed on the reflecting surface of the light guiding body by coating, printing, vapor deposition or sputtering, and the use of the scattering pattern units to increase the reflection of light. Increase the uniformity of illumination.

The main purpose of this creation is to provide a light guide strip structure for improving the uniformity of light output. The light guide bar structure according to the present invention can be applied to a light guiding device including illumination, backlight, signage, and display purpose functions.

In order to achieve the above object, the present invention provides a light guiding strip structure having a long axis structure and defining a long axis direction, the light guiding strip including at least one light incident surface, a reflective surface and a main light emitting surface. The light incident surface is located at an end portion of the light guide strip in the long axis direction, and the reflective surface and the light exit surface are respectively located on opposite sides of the long axis direction of the light guide strip; wherein the reflective surface is The integrally formed recess is provided with a plurality of light reflecting structures arranged along the long axis direction and having a dimensional gradient change.

The light guide bar structure as described above, wherein the plurality of light reflecting structures are hemispherical grooves that open on the surface of the reflecting surface.

In the light guide bar structure as described above, the plurality of light reflection structures are disposed at equal intervals on the surface of the reflection surface in the longitudinal direction of each other.

The light guide bar structure as described above, wherein the plurality of light reflecting structures have a dimensional gradient change which gradually increases in depth in the long axis direction.

The light guide bar structure as described above, wherein the plurality of light reflecting structures have a large depth dimension near the middle portion of the light guiding strip, and a dimensional gradient in which the depth dimension of the both ends of the light guiding strip is tapered.

In order to familiarize the skilled person with the purpose, features and effects of the present invention, the present invention will be described in detail by the following specific embodiments and with the accompanying drawings, however, the drawings are only provided. References and instructions are not intended to limit the creation of this work.

1, 2‧‧‧Light guide strips

10‧‧‧Into the glossy surface

20‧‧‧Main glazing

30‧‧‧reflecting surface

31‧‧‧ surface

32‧‧‧Light reflection structure

50‧‧‧Light source

D‧‧‧ spacing

H1, H2, H3‧‧‧ groove depth

L‧‧‧ incident light

R‧‧‧ opening diameter

X‧‧‧ long axis direction

Y‧‧‧Short axis direction

FIG. 1 is a schematic cross-sectional view showing an embodiment of a light guide bar structure.

2 is a schematic cross-sectional view showing another embodiment of the structure of the light guide bar.

The following is a specific embodiment to illustrate the implementation of the light guide strip structure disclosed in the present application. Those skilled in the art can easily understand the advantages and effects of the present invention by the contents disclosed in the present specification. The present invention may also be implemented or applied by other different specific embodiments, and the details in the present specification may also be based on different viewpoints and applications, without departing from the creation of the present invention. Various modifications and changes are made under the spirit. In addition, the drawings of the present creation are only for the sake of simplicity, and are not depicted in actual dimensions, that is, the actual dimensions of the relevant structures are not reflected, which will be described first. The following embodiments will further explain the related technical content of the present invention, but the disclosed content is not intended to limit the technical scope of the present creation.

Please refer to FIG. 1. FIG. 1 is a cross-sectional view showing an embodiment of a light guide bar structure. The light guide bar 1 has a long axis structure and defines a long axis direction X and a short axis direction perpendicular to the long axis direction X. Y. The light guiding strip 1 includes at least one light incident surface 10, a main light exiting surface 20, and a reflecting surface 30. The light incident surface 10 is located at both ends of the long axis direction X of the light guiding strip 1, and the main light emitting surface 20 and the reflecting surface 30 are respectively located at the opposite end faces of the light guiding strip 1 in the long axis direction X. In other words, the main light emitting surface 20 The short-axis direction Y extending in the longitudinal direction from the reflecting surface 30 is provided on the upper and lower end faces of the light guiding strip 1.

In the present embodiment, the reflecting surface 30 has a surface 31 from which a plurality of light reflecting structures 32 are recessed inside the light bar 1, and the light reflecting structures 32 are arranged at intervals along the long axis direction X. In this embodiment, for simplicity of illustration, only three light reflecting structures 32 are taken as an example, and the number thereof is not a limitation of the present invention. The shape of the light reflecting structure 32 is a plurality of semicircular grooves recessed from the surface of the light guiding strip 1 to the inside of the light bar 1, and each light reflecting structure 32 has the same pitch D therebetween. That is, each of the light reflecting structures 32 has the same distance D from the periphery of the opening of the surface 31 to the periphery of the opening of the adjacent light reflecting structure 32.

It is worth noting that the plurality of light reflecting structures 32 are arranged at intervals along the long axis direction X and have a size gradient change setting. As shown in FIG. 1, wherein the light reflecting structure 32 is a groove opening to the surface 31 of the reflecting surface 30, the light reflecting structure 32 has the same surface 31 opening diameter R and different groove depths H1, H2, H3. Wherein, the groove depths H1, H2, and H3 respectively exhibit a dimensional gradient change that gradually increases along the long axis direction X. In other words, in the present embodiment, the plurality of light reflecting structures 32 It is a combination of a plurality of semicircular grooves having the same opening diameter R and a groove depth H1 < H2 < H3 depth dimension change.

It should be noted that the shape of the light reflecting structure 32 may be selected from a hemispherical shape, a U-cut, an elliptical shape, a conical shape, or a pyramidal shape, or a spherical or aspheric curved surface shape reflecting structure as a conventional lens. . In addition, the distance D between the light reflecting structures 32 and the size of the opening diameter R may correspond to different shapes of the light guiding strips 1 and may have different combinations of dimensional changes, which is not a limitation of the present invention.

The light-incident surface 10 of the light-guiding strip 1 is provided with a light source 50 for providing incident light L. The light source 50 is disposed at the side of the light-guiding strip 1 to form a light-guide module of one side, and the conventional light source 50 is, for example, a light-emitting diode. Polar body (LED). The incident light L may be partially reflected by the light reflecting structure 32 on the reflecting surface 30 to guide the incident light L to the main light emitting surface 20. The light reflecting structure 32 having the dimensional gradient change, for example, the light reflecting structure 32 of FIG. 1 exhibits an increasing size gradient change away from the light source 50, so that the incident light L of the light source 50 is away from the light guiding strip away from the light source 50. In the interior, the portion of the incident light L can be guided away from the main light exiting surface 20 of the light source 50, whereby the incident light L emitted from the light source 50 can be self-exposed by the light reflecting structure 32. The face 20 is vented to increase the uniformity of the light exiting the main illuminating surface 20 and to reduce the occurrence of dark bands.

In addition, please refer to FIG. 2, which is a cross-sectional view of another embodiment of the structure of the light guide bar. The light guide strip structure of FIG. 2 is similar to the light guide strip structure of FIG. 1, and the same portions are not described herein again. The main difference between the two structures is that the size gradient of the light reflection structure varies. In this embodiment, the size gradient of the light reflection structure can be different according to the structure of the light guide bar and the number of light sources. The concept of the arrangement of changes is further explained.

In the present embodiment, the two light sources 59 are respectively disposed on the light-incident surface 10 side of both end portions of the long-axis direction X of the light-guide strip 2. Since the size of the light reflecting structure 32 corresponds to the distance of the light source 50, the change is gradually increased. Therefore, in the case where the light source 50 is disposed at both ends of the light guiding strip 2 in this embodiment, the size gradient of the light reflecting structure 32 changes to be self-guided. At the center of the light strip 2 or between the two light sources 50, the light guides 10 on both sides of the light strip 2 are gradually reduced in distribution pattern. For example, the light reflecting structure 32 may have a size change of a normal distribution curve, and the light reflecting structure 32 at the center of the light incident surface 10 at both ends of the light guiding strip 2 has a maximum groove depth H2.

The light guide strip of this creation can be molded by using a mold. The mold can be completed by using a laser repair welding technique. Therefore, the light reflecting structure and the light guiding strip can be integrally formed, and the manufacturing process is simple and the cost is low. Moreover, by means of the shape, size, spacing (degree of density) of the light reflecting structure, the light reflecting structure controls the optical path to guide the incident light in the light guiding strip to the main light emitting surface to generate uniformity. The effect of surface illumination.

The above description is only a preferred and feasible embodiment of the present invention, and thus does not limit the scope of the patent of the present invention. Therefore, any equivalent technical changes made by using the present specification and the contents of the schema are included in the scope of protection of the present creation. .

1‧‧‧Light guide strip

10‧‧‧Into the glossy surface

20‧‧‧Main glazing

30‧‧‧reflecting surface

31‧‧‧ surface

32‧‧‧Light reflection structure

50‧‧‧Light source

D‧‧‧ spacing

H1, H2, H3‧‧‧ groove depth

L‧‧‧ incident light

R‧‧‧ opening diameter

X‧‧‧ long axis direction

Y‧‧‧Short axis direction

Claims (5)

A light guiding strip structure having a long axis structure and defining a long axis direction, comprising: at least one light incident surface, the light incident surface being located at an end of the long axis direction of the light guiding strip; And a reflecting surface, the reflecting surface and the main light emitting surface are respectively located on opposite sides of the long axis direction of the light guiding strip; wherein the surface of the reflecting surface is concavely arranged with a plurality of lengths arranged along the long axis direction and having a size gradient A changing light reflecting structure. The light guide strip structure of claim 1, wherein the light reflecting structures are hemispherical grooves that open on a surface of the reflecting surface. The light guide bar structure according to claim 1, wherein the light reflection structures are disposed at equal intervals along the long axis direction on the surface of the reflective surface. The light guide bar structure of claim 1, wherein the light reflection structures have a dimensional gradient change that gradually increases in depth in a long axis direction. The light guide bar structure according to claim 1, wherein the light reflection structures have a large depth dimension near the middle portion of the light guide bar, and a size gradient in which the depth dimension of both ends of the light bar is tapered.