CN201170498Y - light guide - Google Patents

Abstract

A light guide device comprises a light guide column, a light source and a carrier, wherein the light guide column and the light source are both arranged in the carrier, and only the emergent surface of the light guide column is exposed out of the carrier, so that light is prevented from overflowing and leaking, and the brightness can be improved. The light guide column is a cylindrical body with light conducting property, the light guide column is provided with a light incident surface, a light reflecting surface and a light emergent surface which are positioned at different positions on the side surface of the light guide column, the incident surface, the reflecting surface and the emergent surface are all provided with optical structures, so that the incident surface has a light source diffusion effect, the reflecting surface has a light source reflecting effect, and the emergent surface has a light source uniform guiding effect.

Description

light guide

technical field

The utility model relates to a light guide device which can be applied to a backlight module or direct lighting.

Background technique

The use of backlight modules has become increasingly widespread, and it is used in monitors, LCD TVs, notebook computers, ... and other devices that require backlight to display images. A general backlight module usually includes a light guide plate. A reflective sheet is arranged on the first side of the light guide plate, and a plurality of optical films composed of a diffusion sheet and a prism sheet are arranged on the opposite second side. A light source is provided, and the light emitted by the light source is projected into the side of the light guide plate, part of the light is reflected by the reflective sheet, and then sequentially emitted through the diffuser sheet and the prism sheet. In other words, in the known backlight module, the light guide component is a flat light guide plate, but the backlight module manufactured by using the flat light guide plate has a large loss of light source, which may cause uneven brightness of the screen of the display device. Even condition.

Utility model content

The main purpose of the present utility model is to provide a light guide device suitable for backlighting or lighting.

The main feature of the light guide device provided by the utility model is that a columnar body is made of a material with excellent light-transmitting properties, and the light guide column is formed with a light incident surface, a light reflection surface and a light beam at different positions on the side of the light guide column. The exit surface, the incident surface, the reflection surface and the exit surface are all equipped with optical structures, so that the incident surface has the light source diffusion effect, the reflection surface has the light source reflection effect, and the exit surface has the light source uniform export effect; Installed together with the light source in a carrier, the light guide column is covered by the carrier or optical film except the outgoing surface exposed to the carrier, so as to avoid light leakage and reduce the brightness of the outgoing surface.

The optical structure of the light guide column is to integrally form light spots such as V-shaped grooves, rhombuses, diamonds, circles, semicircles, squares, polygons, etc., printing processing, laser beams, etc. when manufacturing the light guide column. Processing, grating, mask, or atomization treatment, etc., to achieve the optical effect of refracting and reflecting light.

After the light guide column and the light source are arranged in the carrier, the light source can be attached to the incident surface of the light guide column, and the light guide body itself is used as a medium to directly project light into the light guide column; the light source can also be kept at a distance from the incident surface, Through the air as the medium, the light is projected into the light guide column.

The utility model is arranged on the incident surface of the light guide column, which can be a plane, or can be formed as a sawtooth surface, or be formed with a plurality of semicircular grooves and a plurality of ㄇ-shaped grooves.

The utility model is arranged on the reflective surface on the side of the light guide column, which has an appropriate angle, so that the light incident from the incident surface can be reflected and emitted from the outgoing surface. The reflective surface can be a plane or a convex shape. The arc surface or the aspherical convex arc surface can also be the concave arc surface or the aspheric concave arc surface.

The utility model is set on the exit surface of the side of the light guide column, which can be a protruding arc surface or an aspherical convex arc surface, a concave arc surface or an aspherical concave arc surface, a plane, a curved surface, a polygonal surface, etc. Various possibilities shape.

The aforementioned structures of the incident surface, the reflective surface and the outgoing surface can be implemented in a permutation and combination manner.

Description of drawings

FIG. 1 is a three-dimensional combined cross-sectional view showing the structure of the first embodiment of the light guide device of the present invention.

FIG. 2 is an exploded perspective view showing the assembly relationship of the components in FIG. 1 .

FIG. 3 is a three-dimensional combined cross-sectional view showing the structure of the second embodiment of the light guide device of the present invention.

FIG. 4A is a partial perspective view showing that the incident surface of the light guide column structure of the first embodiment of the present invention is a plane.

FIG. 4B is a partial perspective view showing the second embodiment of the utility model in which the incident surface of the light guide column structure is a plane.

FIG. 4C is a partial perspective view showing that the incident surface of the light guide column structure of the first embodiment of the present invention is sawtooth-shaped.

FIG. 4D is a partial perspective view showing that the incident surface of the light guide column structure of the second embodiment of the present invention is sawtooth-shaped.

FIG. 4E is a partial perspective view showing that the incident surface of the light guide column structure of the first embodiment of the present invention has a plurality of semicircular grooves.

FIG. 4F is a partial perspective view showing that the incident surface of the light guide column structure of the second embodiment of the present invention has a plurality of semicircular grooves.

FIG. 4G is a partial perspective view showing that the incident surface of the light guide column structure of the first embodiment of the present invention has a plurality of ℇ-shaped grooves.

FIG. 4H is a partial perspective view showing that the incident surface of the light guide column structure of the second embodiment of the present invention has a plurality of ℇ-shaped grooves.

FIG. 5A is a schematic end view showing an embodiment of a light guide column of the present invention in which the reflective surface is a plane.

FIG. 5B is a schematic end view of an embodiment showing that the reflective surface of the light guide column of the present invention is a convex arc surface.

FIG. 5C is a schematic end view showing an embodiment in which the reflective surface of the light guide column of the present invention is a concave arc surface.

FIG. 6A is a schematic end view showing an embodiment of the light guide column of the present invention in which the outgoing surface is a convex arc surface.

FIG. 6B is a schematic end view showing an embodiment of the light guide column of the present invention in which the outgoing surface is a plane.

FIG. 6C is a schematic end view showing an embodiment in which the outgoing surface of the light guide column of the present invention is a concave arc surface.

FIG. 6D is a schematic end view showing an embodiment of the light guide column of the present invention in which the outgoing surface is a curved surface.

FIG. 6E is a schematic end view showing an embodiment in which the outgoing surface of the light guide column of the present invention is a polygonal surface.

FIG. 7 is a perspective view showing an embodiment of the light guide column of the present invention applied to a light box.

in the picture

1 light guide column, 11 incident surface, 111 sawtooth, 112 semicircular groove, 113 ㄇ-shaped groove, 12 reflective surface, 13 outgoing surface,

2 light source, 21 circuit board, 22 LED, 3 carrier, 31 inner space, 4 light box, 5 diffusion plate

Detailed ways

The implementation of the present utility model will be described in more detail below in conjunction with the accompanying drawings and component reference signs, so that those familiar with this technical field can implement it after studying this specification.

1 and 2 are perspective views and exploded views showing the first embodiment of the light guide device of the present invention, which includes a light guide column 1, at least one light source 2 and a carrier 3; wherein the light guide column 1 is made of excellent The radial section of the columnar body made of light-conducting material can be in various shapes, but Fig. 1 and Fig. 2 only show one of the shapes, and the rest of the embodiments will be disclosed in the accompanying drawings. The light source 2 is preferably LED22 (light emitting diode), and these LEDs are arranged on the circuit board 21 . The carrier 3 is made of opaque material, and has an inner space 31 capable of accommodating the light guide rod 1 and the light source 2 ; the light guide rod 1 and the light source 2 are installed in the inner space 31 . 1 and 2 show that the light guide column 1 of the present invention has a light incident surface 11, a light reflective surface 12 and a light exit surface 13 located at different positions on its side, and the incident surface 11, reflective surface 12 and exit surface 13 are all An optical structure is integrally provided, so that the incident surface 11 has the effect of light source diffusion, the reflective surface 12 has the effect of light source reflection, and the exit surface 13 has the effect of uniformly deriving the light source. After the light guide column 1 and the light source 2 are installed in the carrier 3, only the outgoing surface 13 of the light guide column 1 is exposed to the carrier 3, and the rest of the parts are covered by the carrier 3; After entering the light guide column 1 , the light will be transmitted in the light guide column, part of the light will be emitted from the exit surface 13 in a straight line, and part of the light will be reflected by the reflective surface 12 and then exit from the exit surface 13 . The carrier 3 is made of a light-impermeable plate material, or may be made of an opaque optical film.

In the light guide device shown in Figure 1 and Figure 2, after the light guide column 1 and the light source are installed in the carrier 3, the light source 2 is directly placed on the incident surface 11, and the light guide column 1 is used as a medium to guide the incident light. However, the present invention can also set the volume of the light guide column 1 to be smaller as shown in FIG. Therefore, the light generated by the light source 2 can be transmitted from the incident surface 11 into the light guide column with air as the medium, and the light can also be reflected by the reflective surface 12 and then emitted from the outgoing surface.

4A to 4H show some embodiments of the incident surface 11 of the structures of the two light guide rod embodiments of the present invention. 4A and 4B show that the incident surface 11 of the first and second embodiments of the light guide rod 1 can be a plane. FIG. 4C and FIG. 4D show that a plurality of serrations 111 can be formed on the incident surface of the first and second embodiments of the light guide rod 1 . 4E and 4F show that the incident surface of the first and second embodiments of the light guide rod 1 can be formed with a plurality of semicircular grooves 112 . 4G and 4H show that the incident surface of the first and second embodiments of the light guide rod 1 can be formed with a plurality of ℇ-shaped grooves 113 .

5A to 5C show several embodiments of the reflective surface 12 of the present utility model, because the incident surface 11 and the outgoing surface 13 can be in any form, and can cooperate with the reflective surface 12 in a permutation and combination mode, so reflection The surface 12 is shown by a solid line, and the incident surface 11 and the outgoing surface 13 are both shown by phantom lines. As shown in Figure 5A, the reflective surface 12 can be a plane; it can also be a convex arc surface (or aspheric convex arc surface) as shown in Figure 5B; it can also be a concave arc surface (or aspheric convex arc surface) as shown in Figure 5C. or aspherical concave arc surface).

6A to 6E show several embodiments of the exit surface 13 of the present utility model. Since the incident surface 11 and the reflection surface 12 can be in any form, and can be arranged and combined with the exit surface 13, the exit The surface 13 is shown by a solid line, and the incident surface 11 and the reflective surface 12 are both shown by phantom lines. As shown in Figure 6A, the outgoing surface 13 can be a convex arc (or aspheric convex arc); it can also be a plane as shown in Figure 6B; it can also be a concave arc (or as shown in Figure 6C). Aspherical concave arc surface); also can be the curved surface as shown in Figure 6D; also can be the polygonal surface as shown in Figure 6E.

Fig. 7 shows that the light guide device of the present invention can be installed in the light box 4, and then a diffusion plate 5 or optical film is covered on the light box 4, so that the light guide column 1 can be illuminated in the light box.

The above-mentioned ones are only used to explain the preferred embodiments of the present utility model, and are not intended to limit the present utility model in any form. Therefore, any modification or change made under the same spirit will be accepted. Still should be included in the category that the utility model intends to protect.

Claims (23)

1. A light guiding device, characterized in that, said light guiding device comprises: A light guide column is a columnar body with the property of transmitting light. The light guide column has a light incident surface, a light reflection surface and a light exit surface at different positions on its side. The incident surface, reflection surface and exit surface are uniformly provided with an optical structure, so that the incident surface has a light source diffusion effect, the reflective surface has a light source reflection effect, and the exit surface has a light source uniform export effect; a light source, located close to the incident surface of the light guide column; A carrier is used to provide the light guide column and the light source in it, and expose the outgoing surface to the carrier, and the rest of the parts are covered by the carrier. 2. The light guiding device according to claim 1, wherein the incident surface is a plane. 3. The light guiding device according to claim 1, wherein the incident surface has a plurality of sawtooths. 4. The light guiding device according to claim 1, wherein the incident surface has a plurality of semicircular grooves. 5. The light guiding device according to claim 1, wherein the incident surface has a plurality of ㄇ-shaped grooves. 6. The light guiding device according to any one of claims 1 to 5, characterized in that the reflective surface is a plane. 7. The light guiding device according to any one of claims 1 to 5, wherein the reflective surface is a convex arc surface. 8. The light guiding device according to any one of claims 1 to 5, wherein the reflective surface is a concave arc surface. 9. The light guide device according to claim 6, wherein the outgoing surface is a convex arc surface. 10. The light guiding device according to claim 7, wherein the outgoing surface is a convex arc surface. 11. The light guiding device according to claim 8, wherein the outgoing surface is a convex arc surface. 12. The light guiding device according to claim 6, wherein the outgoing surface is a plane. 13. The light guiding device according to claim 7, wherein the outgoing surface is a plane. 14. The light guiding device according to claim 8, wherein the outgoing surface is a plane. 15. The light guiding device according to claim 6, wherein the outgoing surface is a concave arc surface. 16. The light guiding device according to claim 7, wherein the outgoing surface is a concave arc surface. 17. The light guiding device according to claim 8, wherein the outgoing surface is a concave arc surface. 18. The light guide device according to claim 6, wherein the outgoing surface is a curved surface. 19. The light guiding device according to claim 7, wherein the outgoing surface is a curved surface. 20. The light guiding device according to claim 8, wherein the outgoing surface is a curved surface. 21. The light guide device according to claim 6, characterized in that, the outgoing surface is a polygonal surface. 22. The light guiding device according to claim 7, characterized in that the outgoing surface is a polygonal surface. 23. The light guiding device according to claim 8, wherein the outgoing surface is a polygonal surface.

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