Light guiding device

Light guiding device

The present invention relates to a light guiding device that can be applied to a backlight module or a direct lighting application.

The use of backlight modules has become increasingly widespread, and devices such as monitors, LCD TVs, notebook computers, etc. that require a backlight to display a picture are used. A general backlight module usually includes a light guide plate. The first side of the light guide plate is provided with a reflective sheet, and the opposite second side is provided with a plurality of optical films composed of a diffusion sheet and a cymbal sheet. The side of the light guide plate is provided. The light source is arranged, and the light emitted by the light source is projected from the side of the light guide plate, part of the light is reflected by the reflective sheet, and then sequentially passed through the diffusion sheet and the cymbal sheet. In other words, in the conventional backlight module, the light guiding element is a flat light guiding plate, but the backlight module manufactured by using the flat type light guiding plate has a large loss of light source, which may cause brightness of the screen of the display device. Uniform situation.

The main purpose of this creation is to provide a light guiding device suitable for use as a backlight or illumination.

The main feature of the light guiding device provided by the present invention is that a columnar body is formed by using a material having excellent light-conducting properties, and a light incident surface, a light reflecting surface and a light having different positions on the side of the light guiding column are formed in the light guiding column. The exit surface, the incident surface, the reflective surface and the exit surface are all provided with an optical structure, the incident surface has a light source diffusion effect, the reflective surface has a light source reflection effect, and the exit surface has a uniform light source output effect; the light guide column Mounted in a carrier together with the light source, the light guide column is covered by the carrier or the optical film except that the exit surface exposes the carrier, thereby reducing the brightness of the exit surface by avoiding light leakage.

The optical structure of the light guiding column is integrally formed into a light spot such as a V-shaped groove, a diamond shape, a diamond shape, a circular shape, a semicircular shape, a square shape, a polygonal shape, a printing process, and a laser when manufacturing the light guiding column. Processing, grating, reticle, or atomization to achieve the optical effect of refracting and reflecting light.

After the light guide column and the light source are disposed in the carrier, the light source can be attached to the incident surface of the light guide column, and the light guide body directly serves the medium to project the light into the light guide column; the light source can also maintain a distance from the incident surface. Light is projected into the light guide column through the air as a medium.

The creation is provided on the incident surface of the light guide column, and may be a flat surface, or may be formed as a sawtooth surface, or formed into a shape having a plurality of semicircular grooves and a plurality of meandering grooves.

The present invention is provided on a reflecting surface disposed on the side of the light guiding column, and has an appropriate angle so that light incident from the incident surface can be reflected and emitted from the emitting surface, and the reflecting surface can be a plane or a convex arc. The surface or aspherical convex arc surface may also be a concave curved surface or an aspherical concave curved surface.

The present invention is provided on the exit surface of the side of the light guide column, and may be a convex curved surface or an aspherical convex curved surface, a concave curved surface or an aspheric concave curved surface, a plane, a curved surface, a polygonal surface, and the like. .

The structures of the incident surface, the reflecting surface and the emitting surface described above can be implemented in a combination of arrangement and combination.

The implementation of the present invention will be described in more detail below with reference to the drawings and component symbols, so that those skilled in the art can implement the present specification after studying the present specification.

1 and 2 are a perspective view and an exploded view showing a first embodiment of the light guiding device of the present invention, comprising a light guiding column 1, at least one light source 2 and a carrier 3; wherein the light guiding column 1 is provided A columnar body made of a material excellent in light-conducting properties may have various shapes in a radial cross section. However, the first and second figures show only one of the shapes, and the remaining embodiments will be disclosed in the following drawings. . Preferably, the light source 2 is an LED 22 (light emitting diode), and the LEDs are disposed on the circuit board 21. The carrier 3 is made of a material that is opaque to light, and has an inner space 31 that can accommodate the light guide column 1 and the light source 2; the light guide column 1 and the light source 2 are mounted in the inner space 31. The first and second figures show that the light guide column 1 of the present invention has a light incident surface 11, a light reflecting surface 12 and a light exit surface 13 at different positions on the side thereof, and the incident surface 11, the reflecting surface 12 and the emitting surface 13 are integrated. The optical structure is provided such that the incident surface 11 has a light source diffusing effect, and the reflecting surface 12 has a light source reflecting effect, and the emitting surface 13 has a light source uniform deriving effect. After the light guide column 1 and the light source 2 are mounted in the carrier 3, only the exit surface 13 of the light guide column 1 is exposed to the carrier 3, and the remaining portion is covered by the carrier 3; when the light emitted by the light source 2 is emitted from the incident surface 11, After being guided into the light column 1, the light is conducted in the light guide column, and some of the light is directly emitted from the exit surface 13, and part of the light is reflected by the reflective surface 12 and then emitted from the exit surface 13. The carrier 3 is made of a non-transparent plate material, and can also be made of a non-transparent optical film.

In the light guiding device shown in FIG. 1 and FIG. 2, after the light guiding column 1 and the light source are mounted in the carrier 3, the light source 2 is directly placed on the incident surface 11, and the light guided by the light guiding column 1 is used to conduct the incident light. . However, the present invention can also set the volume of the light guide column 1 to be small as shown in the third figure. After the light guide column 1 and the light source 2 are mounted in the carrier 3, the light source 2 and the incident surface 11 are kept at a distance. Therefore, the light generated by the light source 2 can be transmitted from the incident surface 11 into the light guide column by air as a medium, and the light can also be reflected by the reflective surface 12 and emitted from the exit surface.

The fourth to fourth H-th drawings show some embodiments of the incident face 11 of the structure of the two light guide column embodiments. 4A and 4B show that the incident surface 11 of the first and second embodiments of the light guiding column 1 may be a flat surface. The fourth C and four D graphs show that the incident faces of the first and second embodiments of the light guiding column 1 can form a plurality of saw teeth 111. The fourth E and fourth F diagrams show that the incident faces of the first and second embodiments of the light guiding column 1 can be formed with a plurality of semicircular grooves 112. The fourth G and four H patterns show that the incident faces of the first and second embodiments of the light guiding column 1 can be formed with a plurality of meandering grooves 113.

The fifth to fifth C diagrams show several embodiments of the reflective surface 12 of the present invention, since the incident surface 11 and the exit surface 13 can be of any form and can be matched with the reflective surface 12 in an array arrangement. Therefore, the reflecting surface 12 is indicated by a solid line, and the incident surface 11 and the exit surface 13 are both indicated by imaginary lines. As shown in FIG. 5A, the reflective surface 12 may be a flat surface; or may be a convex curved surface (or an aspherical convex curved surface) as shown in FIG. 5B; or may be as shown in FIG. The concave curved surface (or the aspherical concave curved surface).

6A to 6E show several embodiments of the exit surface 13 of the present invention, since the incident surface 11 and the reflective surface 12 can be of any form and can be matched with the exit surface 13 in an array arrangement. Therefore, the exit surface 13 is indicated by a solid line, and the incident surface 11 and the reflective surface 12 are both indicated by imaginary lines. As shown in FIG. 6A, the exit surface 13 may be a convex curved surface (or an aspherical convex curved surface); or may be a flat surface as shown in FIG. 6B; or as shown in FIG. A concave curved surface (or an aspherical concave curved surface); a curved surface as shown in FIG. 6D; or a polygonal surface as shown in FIG.

The seventh figure shows that the light guiding device of the present invention can be installed in the light box 4, and then a diffusing plate 5 or an optical film is placed on the light box 4 so that the light guiding column 1 can be illuminated in the light box.

The above description is only for the purpose of explaining the preferred embodiment of the present invention, and is not intended to impose any form of limitation on the creation, so that any modifications or changes made in the same spirit are still It should be included in the scope of this creative intent.

<p>1. . . Light guide column</p><p>11. . . Incident surface</p><p>111. . . Sawtooth</p><p>112. . . Semicircular groove</p><p>113. . . False groove</p><p>12. . . Reflective surface</p><p>13. . . Exit surface</p><p>2. . . light source</p><p>twenty one. . . Circuit board</p><p>twenty two. . . led</p><p>3. . . Carrier</p><p>31. . . Inner space</p><p>4. . . Light box</p><p>5. . . Diffuser</p>

The first figure is a perspective sectional view showing the structure of the first embodiment of the present light guiding device.

The second figure is an exploded perspective view showing the component combination relationship of the first figure.

The third figure is a perspective sectional view showing the structure of the second embodiment of the present light guiding device.

4A is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the first embodiment of the present invention is a flat surface.

FIG. 4B is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the second embodiment of the present invention is a flat surface.

The fourth C is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the first embodiment of the present invention is sawtooth.

The fourth D is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the second embodiment of the present invention is sawtooth.

The fourth E is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the first embodiment of the present invention has a plurality of semicircular grooves.

The fourth F is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the second embodiment of the present invention has a plurality of semicircular grooves.

The fourth G diagram is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the first embodiment of the present invention has a plurality of meandering grooves.

The fourth H is a partial perspective view showing an embodiment in which the incident surface of the light guiding column structure of the second embodiment of the present invention has a plurality of meandering grooves.

Figure 5A is a schematic end view showing an embodiment in which the reflecting surface of the present light guiding column is a flat surface.

Fig. 5B is a schematic end view showing an embodiment in which the reflecting surface of the present light guiding column is a convex curved surface.

The fifth C is a schematic end view showing an embodiment in which the reflecting surface of the present light guiding column is a concave curved surface.

Figure 6A is a schematic end view showing an embodiment in which the exit surface of the present light guide column is a convex curved surface.

Figure 6B is a schematic end view showing an embodiment in which the exit surface of the present light guide is flat.

The sixth C is a schematic end view showing an embodiment in which the exit surface of the present light guiding column is a concave curved surface.

The sixth D-figure is a schematic end view showing an embodiment in which the exit surface of the creative light guide column is a curved surface.

Figure 6E is a schematic end view showing an embodiment in which the exit surface of the present light guiding column is a polygonal surface.

The seventh figure is a perspective view showing an embodiment in which the light guide column of the present invention is applied to a light box.