TWM463819U - Improved light guide structure - Google Patents

Description

Light guide plate structure improvement

The present invention is a light guide plate structure improvement, in particular, a light guide plate structure capable of providing a light guide plate with uniform and sufficient luminance surface light source.

A backlight module that uses a light-emitting diode (LED) to illuminate with a light guide plate has been widely used, and is divided into a side-lit backlight module or a direct-lit backlight module depending on the projection angle of the light source. Among them, in the direct type backlight module, the light emitted by the plurality of light emitting diodes (point light sources) is generally converted into a surface light source through the diffusion film. However, the method of atomizing and diffusing light through the diffusion film reduces the luminance of the surface light source, and the projection position of the light-emitting diode is usually disposed outside the light guide plate and is refracted by the light-incident surface. The structure guides the light source to the light-emitting surface to provide a surface light source. However, since the distance between the projection point of the beam and the refraction point is too large, the beam is easily diffused and not concentrated, so that the uniformity of the surface light source is reduced. In addition, the light guide plate and the light-emitting diode in the direct-lit backlight module are usually separately installed, and the two are not stably combined, and the light source of the light-emitting diode is often projected by the light guide plate and the light-emitting diode. The assembly error of the body is offset, which in turn affects the uniformity of the guiding angle of the light guide plate, and it is difficult to simultaneously consider the uniform characteristics and brightness requirements of the light source.

The main purpose of this creation is to provide a point source that can enter the light guide plate. Converting a light guide plate structure with uniform and sufficient brightness surface light source, using the diffusing structure of the light guide plate to enter the light surface, converting the point light source of the light emitting diode into a uniform and desired brightness through the rough surface of the diffusing structure The surface light source is provided with positioning holes for the aluminum back plates combined at the bottom of the light guide plate to be positioned to each other, and the light emitting diode is fixed to reduce the offset and maintain the fixed light source projection angle, thereby obtaining the best optical effect to solve the traditional guide. The problem of surface light source with uneven light plate and low luminance.

For the purpose of achieving the above, the light guide plate structure provided by the present invention comprises a light guide plate substrate and a diffusing structure disposed on the light incident surface of the light guide plate substrate and a positioning hole for positioning the light guide plate and the aluminum back plate; wherein the light guide plate The substrate has a light-incident surface and a light-emitting surface opposite to the light-incident surface; the diffusing structure is formed by a plurality of accommodating grooves extending along the light-incident surface of the light guide plate and intersecting in a segment shape (ie, a section is not penetrated) a through-hole design is formed by a plurality of through holes to the light-emitting surface, and the surface in the through-hole is formed with a surface structure of different roughness according to the material of the light guide plate, so that when the accommodating groove is used for embedding the LED lamp of the light-emitting diode The light-emitting diode LED lamp can be located at the bottom of the through-hole, so that when the point light source of the light-emitting diode is projected onto the rough surface of the through-hole, the light beam is diffused by the rough surface, projected into the light guide plate and then guided by the light guide plate. Guided to the light-emitting surface to release, the resulting surface light source has a uniform and sufficient brightness optical effect

In order to enhance the optical effect of the surface light source, the present invention also has a plurality of positioning holes on the light guide plate to provide a positioning effect of the aluminum back plate and the light guide plate, thereby fixing the projection angle and the diffusing structure of the light emitting diode. The angle of refraction allows the light guide to produce consistent optical performance.

1‧‧‧Light guide plate substrate

10‧‧‧Into the glossy surface

100‧‧‧ accommodating slots

11‧‧‧Glossy

2‧‧‧Diffuse structure

20‧‧‧through hole

200‧‧‧Refractive surface

3‧‧‧Positioning holes

4‧‧‧Lighting diode base

40‧‧‧LED lights

400‧‧‧Light

401‧‧‧ surface light source

5‧‧‧Aluminum backing plate

50‧‧‧Positioning column

6‧‧‧Light guide plate substrate

60‧‧‧projection space

61‧‧‧Reflective surface

Fig. 1 is a perspective view showing the structure of the light guide plate substrate of the present invention.

Fig. 2 is a top plan view of the light guide plate substrate of the present invention.

Fig. 3 is an enlarged view showing a part of the structure of the light guide plate of the present invention.

Fig. 4 is a structural view of the back surface of the light guide plate substrate of the present invention.

Fig. 5 is a cross-sectional view of the light guide plate substrate of the present invention.

Figure 6 is a schematic diagram of the combination of the light guide plate substrate of the present invention.

Fig. 7 is a perspective view showing the combination of the light guide plate substrate of the present invention.

Figure 8 is a schematic diagram of the light refraction of the present creation.

Figure 9 is an exploded view of another embodiment of the present creation.

Figure 10 is a combination of another embodiment of the present creation.

FIG. 1 is a perspective view of the structure of the light guide plate. The light guide plate structure includes a light guide plate substrate 1 having a light incident surface 10 and a light exit surface 11 and a diffusing structure extending on the light incident surface 10 of the light guide plate substrate 1. 2 and a positioning hole 3 penetrating the light-incident surface 10 and the light-emitting surface 11 (as shown in FIGS. 1 to 3); wherein the diffusing structure 2 (as shown in FIGS. 4 and 5) has a substrate along the light guide plate The accommodating groove 100 extending through the light-incident surface 10 and the plurality of through-holes 20 extending through the accommodating groove 100 to the light-emitting surface 11 in a segment type, the through-hole 20 being a refracting surface having a rough surface on one side or more 200 connected to form.

When assembling (see FIG. 6), the accommodating groove 100 of the light-incident surface of the light guide plate substrate 1 is received by the light-emitting diode base 4 above the aluminum back plate 5, even if the LED lamp 40 of the light-emitting diode is buried. At the bottom of the through hole 20 (as shown in FIG. 7), the aluminum back plate 5 is assembled with the light-emitting diode base 4 and the light guide plate substrate 1; and the positioning hole 3 of the light guide plate substrate 1 is provided for the aluminum back. The positioning post 50 of the board 5 is integrated and integrated into a single body, so that the light-emitting diode base 4 is sandwiched by the light guide plate substrate 1 and the aluminum back plate 5 to obtain a positioning effect, so that the light-emitting diode base is obtained. The seat 4 does not shift, but maintains a uniform projection angle of the LED lamp 40.

During operation (see FIG. 8), once the light 400 emitted by the LED lamp 40 of the light-emitting diode reaches the refractive surface 200 of the through-hole roughness, the light beam may be affected by the roughness and concentrated or diffused. The light 400 is diffused in various directions in the light guide plate substrate 1 to facilitate light incident on each region of the light guide plate substrate 1 to provide an optimal guiding effect, and a uniform surface light source 401 having sufficient brightness is generated by the light emitting surface. 11 released.

FIG. 9 is another embodiment of the diffusing structure on the substrate of the light guide plate. The light guide plate substrate 6 is similar to the light guide plate substrate shown in FIG. 1 , and the same components are denoted by the same symbols (refer to FIG. 9 ). The radiation structure includes a accommodating groove 100 opened on the light-incident surface of the light guide plate substrate 1 and a projection space 6 that communicates with the accommodating groove 100 and faces the light-emitting surface 11 without a light-emitting surface 11 . The embedding of the diode LED lamp 40 and the assembly of the components related to the aluminum back plate 5 (refer to FIG. 10), such a structure, the beam generated by the LED lamp 40 embedded in the projection space 6 is generated more The diffusing angle and effect are beneficial to obtain a more uniform surface light source.

1‧‧‧Light guide plate substrate

11‧‧‧Glossy

2‧‧‧Diffuse structure

3‧‧‧Positioning holes

Claims (8)

The structure of the light guide plate is improved, which mainly comprises: a light guide plate substrate, a light exit surface and a light incident surface opposite to the light exit surface; and a plurality of diffusing structures, the diffusing structure is disposed on the light guide plate substrate from the light incident surface a space formed by connecting one or more refractive surfaces having a roughness; the plurality of light-emitting diodes, including a pedestal and an electrically connected LED lamp, embedded in the diffusing structure, and a plurality of positioning holes It is connected between the light-emitting surface and the light-incident surface to locate the combination of the light guide plate substrate and the aluminum back plate. The structure of the light guide plate according to claim 1 is improved, wherein the diffusing structure comprises a plurality of accommodating grooves extending in the same direction along the light incident surface and a plurality of through holes penetrating the accommodating groove. The structure of the light guide plate according to claim 2 is improved, wherein the accommodating groove and the diffusing structures are disposed opposite to each other. The structure of the light guide plate according to claim 2 is improved, wherein the through hole is a refraction space formed by connecting one or more refractive surfaces having roughness. The structure of the light guide plate according to claim 2 is improved, wherein the diffusing structure is a non-penetrating space formed by connecting two or more refractive surfaces having roughness. The structure of the light guide plate according to claim 3 is improved, wherein the data range of the roughness is preferably 0.25 to 0.1 μm/a depending on different materials. The structure of the light guide plate according to claim 1 is improved, wherein the diffusing structures are arranged in an array. The structure of the light guide plate according to claim 1 is improved, wherein the inner surface of the positioning holes may be a surface having a roughness.