CN201318632Y - Light source laying structure of backlight module - Google Patents

Abstract

The utility model relates to a light source laying structure of a backlight module, which is mainly characterized in that the two opposite sides of a light guide board are respectively provided with a plurality of light sources; and the light sources at the two sides are mutually staggered and arranged so as to lead the rays projected into the light guide board to be conducted and distributed more uniformly in the light guide board; the light sources can be arranged at the lateral edges of the light guide board, can also be arranged in the light guide board to keep a distance with the lateral edges, and an included angle can even been arranged on the ray projection direction between the light source at one side of the light guide board, which all can achieve the goal of leading the light guide board to uniformly shine.

Description

Light source layout structure of backlight module

technical field

The utility model relates to a backlight module, in particular to a light source layout structure of the backlight module.

Background technique

The application of backlight modules is very common, such as notebook computers, monitors, mobile phones, LCD TVs, ... and other electronic devices whose displays do not emit light, all need backlight modules to provide light sources.

A general backlight module includes a light guide plate and a light source. For electronic products that require thinner body thickness, LEDs are usually used as the light source, and the light source is placed on the side of the light guide plate. The first side of the light guide plate is A reflection sheet is arranged, and a plurality of optical films composed of a diffusion sheet and a prism sheet are arranged on the opposite second side, and an outer frame surrounds these components. 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 reflection sheet, and then emitted through the diffusion sheet and the prism sheet in sequence.

For a backlight module with a small size, since the area of the light guide plate is small, it is only necessary to install the light source on one side of the light guide plate, but for a backlight module with a larger size, if the light source is only installed on one side of the light guide plate , the light projected into the light guide plate will gradually attenuate when it is transmitted to the other side, resulting in uneven brightness of the light guide plate. Therefore, light sources are usually installed on both sides of the large-area light guide plate to improve the aforementioned single Problem with side lights.

It can be seen from FIG. 5 that a plurality of LED light sources 2 are respectively installed on opposite sides of a light guide plate 1, and the light sources 2 on opposite sides are symmetrical to each other. Therefore, when the light source projects light, the light source along the X direction The problem of low brightness is likely to occur between them, resulting in uneven brightness of the entire light guide plate.

Contents of the invention

The technical problem to be solved by the utility model is to provide a light source arrangement structure of a backlight module, aiming at solving the above problems.

In order to solve the above technical problems, the utility model is achieved through the following technical solutions:

The utility model comprises: a light guide plate and a plurality of light sources; the plurality of light sources are respectively arranged on opposite sides of the light guide plate, and the light sources on the two sides are interlaced to project light from both sides of the light guide plate into the light guide plate.

Compared with the prior art, the beneficial effect of the utility model is that the relative positions of the light sources arranged on both sides of the light guide plate are changed, so that the light projected into the light guide plate can be fully taken into account, thereby achieving the purpose of uniform brightness.

Description of drawings

FIG. 1 is a schematic diagram showing a first embodiment of the present invention in which a plurality of light sources are respectively arranged on opposite sides of a light guide plate, and the light sources on both sides are interlaced.

FIG. 2 is a schematic diagram showing a second embodiment of the present invention in which a plurality of light sources are arranged on opposite sides in a light guide plate, and the light sources on both sides are interlaced.

FIG. 3 is a schematic diagram showing a third embodiment of the present invention in which a plurality of light sources are arranged on opposite sides of the light guide plate, and the two sides of the light guide plate are further provided with optical structures.

FIG. 4 is a schematic diagram showing a fourth embodiment of the present invention in which a plurality of light sources are respectively arranged on opposite sides of the light guide plate, and the light projection directions of the light sources on one side and the light source on the other side form an included angle.

FIG. 5 is a schematic view showing a backlight module in the prior art, which is a schematic diagram of symmetrically arranging light sources on opposite sides of a light guide plate.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

The main purpose of the present invention is to solve the lack of uneven brightness caused by the layout structure of the light source of the backlight module in the prior art on the light guide plate.

The main feature of the utility model is to change the relative positions of the light sources arranged on both sides of the light guide plate, so that the light projected into the light guide plate can be fully taken into account, so as to achieve the purpose of uniform brightness.

One of the technical means of the utility model is to arrange a plurality of light sources on the opposite side edges of the light guide plate respectively, and the light sources on the two sides are arranged in a staggered manner, so as to project light from the opposite sides of the light guide plate into the light guide plate Inside.

Another technical means of the present invention is to arrange a plurality of light sources on opposite sides of the light guide plate respectively, and have a distance from the edges of the two opposite sides of the light guide plate, and the light sources on the two sides are distributed alternately.

Another technical means of the present invention is that when the light source is installed inside the light guide plate, an optical structure capable of reflecting light can also be provided on the opposite side edges of the light guide plate to compensate for the brightness between the back of the light source and the edge of the light guide plate; The optical structure can be distributed along the entire length of the edges on both sides of the light guide plate, or it can be arranged at the positions corresponding to the light sources on both sides of the light guide plate; made.

Another technical means of the present invention is that light sources are arranged on both sides of the light guide plate, and the light projection direction of the light source on one side has an included angle with the light projection direction of the light source on the opposite side, which can compensate When the distance between two adjacent light sources is different, the brightness difference produced by the light guide plate.

Example 1

Referring to Fig. 1, the first embodiment of the present utility model is that a plurality of light sources 2 are respectively arranged on opposite side edges of a light guide plate 1, and the light sources 2 on the two sides are interlaced with each other so as to transmit light from the light guide plate. The opposite sides are projected into the light guide plate. With this arrangement, after the light is projected into the light guide plate, it can achieve a wider and more uniform coverage, so that the light guide plate has a more uniform brightness.

Example 2

Referring to Fig. 2, the second embodiment of the present utility model is that the plurality of light sources 2 are respectively arranged in the opposite sides of a light guide plate 1, and have a distance S from the edges of the opposite sides of the light guide plate 1, and the two The light sources 2 on one side are interlaced with each other, so the light source on one side can project light to the opposite side, and form a wide coverage area.

Example 3

Referring to Fig. 3, the third embodiment of the present utility model follows the structure of the aforementioned second embodiment, that is, the plurality of light sources 2 are respectively arranged in the opposite sides of a light guide plate 1, and are connected to the opposite sides of the light guide plate 1. The side edge has a distance S, and the light sources 2 on the two sides are distributed alternately; however, an optical structure 11 capable of reflecting light can also be provided on the opposite side edges of the light guide plate 1, so that after the light source 2 is projected to the opposite side, The light can be reflected by the optical structure 11 to make up for the lack of brightness that may not be directly projected by the light between the back of the light source 2 and the edge of the light guide plate 1 . The optical structure 11 can be distributed along the entire length of both sides of the light guide plate 1, or it can be arranged at the position corresponding to the light source 2 on both sides of the light guide plate; points are arranged. In the embodiment shown in FIG. 3 , the optical structure 11 is formed by a plurality of sawtooth arrays, and is only arranged on the edge of the light guide plate corresponding to the rear position of the light source 2 .

Example 4

Referring to Fig. 4, the fourth embodiment of the present utility model is that a plurality of light sources 2 are arranged on both sides of the light guide plate 1, and the light sources 2 on the two sides are interlaced with each other, and the light projection direction of the light source 2a on one side There is an included angle with the light projection direction of the light source 2 on the opposite side, the inclination angle of the oblique light source 2a, and the distance between the two light sources 2a can be adjusted according to actual needs, so that two adjacent light sources can be compensated for. When the distance of 2 is different, the brightness difference produced by the light guide plate can achieve wider and more uniform coverage, so that the light guide plate has a more uniform brightness.

The above descriptions 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 relevant modifications or changes made under the same spirit remain unchanged. It should be included in the intended protection scope of the utility model.

Claims (10)

1. A light source layout structure of a backlight module, comprising: a light guide plate and a plurality of light sources; it is characterized in that: the plurality of light sources are respectively arranged on opposite sides of the light guide plate, and the light sources on the two sides are interlaced with each other , so as to project light into the light guide plate from both sides of the light guide plate. 2 . The light source layout structure of the backlight module according to claim 1 , wherein the light sources are arranged on two side edges of the light guide plate. 3 . 3 . The light source arrangement structure of the backlight module according to claim 1 , wherein the light source is disposed in the light guide plate and has a distance from two opposite edges of the light guide plate. 4 . 4 . The light source layout structure of the backlight module according to claim 3 , wherein optical structures for reflecting light are provided on opposite side edges of the light guide plate. 5 . The light source arrangement structure of the backlight module according to claim 4 , wherein the optical structures are distributed along the entire length of the two side edges of the light guide plate. 6 . 6 . The light source arrangement structure of the backlight module according to claim 4 , wherein the optical structure is arranged at the positions corresponding to the light sources on the two side edges of the light guide plate. 7 . 7. The light source arrangement structure of the backlight module according to claim 4, 5 or 6, wherein the optical structure is formed by a plurality of sawtooth arrangements. 8. The light source layout structure of the backlight module according to claim 4, 5 or 6, wherein the optical structure is formed by arranging a plurality of protrusions. 9. The light source arrangement structure of the backlight module according to claim 4, 5 or 6, wherein the optical structure is formed by arranging a plurality of concave points. 10 . The light source arrangement structure of the backlight module according to claim 1 , wherein the light projection direction of the light source on one side of the light guide plate has an included angle with the light projection direction of the light source on the opposite side of the light guide plate. 11 .

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