TWM484120U - Backlight module - Google Patents

Description

Backlight module

The present invention relates to a backlight module, and more particularly to an edge-lit backlight module.

The liquid crystal display can be mainly divided into two parts: a liquid crystal display panel and a backlight module. The liquid crystal display panel is a function for providing a display of the liquid crystal display, and has no illuminating characteristics by itself, and the backlight module is required to provide a light source. Can achieve the effect of the display.

The general backlight module structure can be divided into a direct type backlight module and an edge light type backlight module. In the edge light type backlight module, the light source, the light guide plate, the reflection plate and the diffusion plate are mainly included, and the light guide plate is used for The direction of light transmission is guided to enable light to be uniformly emitted from the light guide plate. The reflector is disposed on the bottom surface of the light guide plate, and the light emitted from the bottom surface of the light guide plate is reflected into the light guide plate again to increase the use efficiency of the light. In order to be disposed on the top surface of the light guide plate opposite to the bottom surface, the light emitted from the top surface of the light guide plate generates more refraction, reflection and scattering phenomenon, so that the light is diffused and more uniform, thereby improving the brightness and uniformity of the liquid crystal display.

For example, in the Republic of China Invention Patent Publication No. I315428, a backlight module of a liquid crystal display includes a light tube, a light guide plate, a diffusion plate, a cymbal plate and a reflection plate, and the lamp tube is used to generate The light guide plate is disposed on one side of the light tube for guiding the light, and the diffusion plate and the slab are disposed on the light guide plate for enhancing the efficiency of the light output by the light guide plate. Wherein, the cymbal includes a main body and a plurality of protrusions, and each of the protrusions has a slope on the main body to prevent light efficiency degradation and ensure a wide viewing angle.

However, in the prior art, the reflector is used to reflect the light back to the light guide plate to increase the utilization of the light, but there is still room for improvement in the light-emitting effect of the backlight module.

The main purpose of the present invention is to solve the conventional reflector provided in the backlight module. Although the utilization of light is increased, the light-emitting effect of the backlight module still needs to be improved.

To achieve the above objective, the present invention provides a backlight module including a light source assembly, a light guide plate, a diffusion sheet, a reflective sheet, and a plurality of reflection points. The light source assembly emits a light; the light guide plate is optically coupled to the light source assembly, and includes a light incident end that introduces the light, a light exiting surface that derives the light, and a light transmitting surface that leads the light and is opposite to the light emitting surface The diffusing sheet is disposed opposite to the light emitting surface and diffuses the light emitted from the light emitting surface; the reflecting sheet is disposed facing the light transmitting surface and reflects the light emitted by the light transmitting surface; and the reflecting point is convexly disposed on the light emitting surface The light reflecting sheet is distributed on the light reflecting sheet, so that the light guided by the light transmitting surface forms a reflecting light source returning to the light guiding plate and diverging at the reflecting point.

In this way, the present invention distributes the reflection point on the reflector, and further forms the diverged reflection light source on the reflection point, so that the reflection source returning to the light guide plate is comprehensive, and the reflection is uniform. The degree not only improves the light-emitting effect of the backlight module, but also further reduces the required brightness of the light source assembly and saves energy.

10‧‧‧Light source components

11‧‧‧shade

12‧‧‧Light source

13‧‧‧Light

131‧‧‧Reflective light source

20‧‧‧Light guide

21‧‧‧Into the light end

22‧‧‧Glossy

23‧‧‧Transparent surface

30‧‧‧Diffuser

40‧‧‧Reflecting film

41‧‧‧Glossy

50‧‧‧Reflection points

61‧‧‧First straight line

62‧‧‧Second straight line

63‧‧‧ third straight line

64‧‧‧fourth straight line

Fig. 1A is a schematic view showing the structure of a first embodiment of the present invention.

Fig. 1B is a partial enlarged view of Fig. 1A.

FIG. 2 is a schematic view showing the position of a reflection point on a diffusion sheet according to the first embodiment of the present invention.

FIG. 3 is a schematic view showing the position of a reflection point on a diffusion sheet according to a second embodiment of the present invention.

The detailed description and technical content of this new model are described below with the following diagram:

Please refer to "FIG. 1A" and "FIG. 1B", and FIG. 1A is a schematic structural view of the first embodiment of the present invention. FIG. 1B is a partial enlarged view of FIG. 1A, as shown in the figure: The present invention is a backlight module comprising a light source assembly 10, a light guide plate 20, a diffusion sheet 30, a retroreflective sheet 40, and a plurality of reflection points 50. The light source assembly 10 emits a light 13 . In this embodiment, the light source assembly 10 includes a lamp cover 11 and a light source 12 . The light cover 11 has an accommodating space and an opening communicating with the accommodating space. The source 12 is disposed in the accommodating space and emits the light 13 toward the opening. The light source 12 can be a Cold Cathode Fluorescent Lamp (CCFL) or a Light-Emitting Diode. ,LED).

The light guide plate 20 is optically connected to the light source assembly 10 and includes an light-incident end 21, a light-emitting surface 22 and a light-transmissive surface 23. The light-incident end 21 is disposed adjacent to the opening for introducing the light source 12 The light ray 13 is disposed on a side of the light guide plate 20 adjacent to the light incident end 21 for deriving the light ray 13 on the other side of the light guide plate 20 The light ray 13 is also disposed opposite to the light-emitting surface 22, and the diffusion sheet 30 is disposed facing the light-emitting surface 22 to diffuse the light ray 13 derived from the light-emitting surface 22, and the reflective sheet 40 faces the light-emitting surface The light transmissive surface 23 is disposed to reflect the light ray 13 derived from the light transmissive surface 23.

The reflective spot 50 is disposed on the retroreflective sheet 40 and distributed on the retroreflective sheeting 40. In this embodiment, the retroreflective sheeting 40 has a light-facing surface 41 opposite to the translucent surface 23, and the reflective spot 50 The light ray 13 led out from the light-transmissive surface 23 is disposed on the light-incident surface 41 to form a divergent light directly on the reflective surface 50 when the light ray 13 is led to the light-emitting surface 41 of the light-reflecting sheet 40. The reflected light source 131 is configured to make the reflected light source 131 returning to the light guide plate 20 comprehensive, and then return to the light guide plate 20 to improve the uniformity of light emission of the backlight module and improve the light-emitting effect.

In addition, it should be noted that the shape, size, and spacing of the reflective dots 50 can be adjusted to match the size of the retroreflective sheeting 40 to achieve a better overall reflection. For example, in the embodiment, taking the reflection point 50 as a circular shape as an example, a single reflection point 50 may have a diameter of 0.12 to 0.15 mm, and between adjacent reflection points 50 may be between A pitch of 0.05 to 0.3 mm, but not as a limitation of the shape, size, and spacing of the reflection point 50.

Next, please refer to FIG. 2 and FIG. 3 respectively. FIG. 2 is a schematic view showing the distribution position of the reflection point on the retroreflective sheeting of the first embodiment of the present invention, and FIG. 3 is a reflection of the second embodiment of the present invention. In the first embodiment, as shown in FIG. 2, a part of the reflection point 50 is arranged along the first line 61 on the reflector 40, and a part of the reflection point 50 is reflected by the reflection point 50. The sheet 40 is arranged along a second line 62 which is adjacent to and parallel to the first line 61. The reflection point 50 on the first line 61 and the reflection point on the second line 62 50 is in alignment with each other; in the second embodiment, as shown in FIG. 3, a part of the reflection point 50 is also arranged on the retroreflective sheet 40 along a third line 63, and a part of the reflection point 50 is reflected by the reflection point 50. The sheet 40 is arranged along a fourth line 64 which is adjacent to and parallel with the third line 63. The second embodiment differs from the first embodiment in that the third line 63 is located on the third line 63. The reflection point 50 between the reflection point 50 and the reflection point 50 located on the fourth line 64 is Mutual offset, to show that the two arrangements may apply to the reflecting plate 40 to achieve a good overall reflective effect, but not limited to the arrangement position.

In summary, since the present invention distributes the reflection point on the reflector, the light is further formed on the reflection point to form a divergent reflection light source, which has a comprehensive reflection effect and improves the uniformity of reflection. Accordingly, the retroreflective sheeting of the present invention can improve the reflection effect by more than 15%, thereby reducing the required brightness of the light source assembly and making the backlight module more power-saving. The new type is highly progressive and meets the requirements for applying for a new type of patent. It is submitted in accordance with the law, and the praying office will grant the patent as soon as possible.

The present invention has been described in detail above, but the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited. That is, the equal changes and modifications made in accordance with the scope of this new application shall remain within the scope of the patent of this new type.

10‧‧‧Light source components

11‧‧‧shade

12‧‧‧Light source

13‧‧‧Light

20‧‧‧Light guide

21‧‧‧Into the light end

22‧‧‧Glossy

23‧‧‧Transparent surface

30‧‧‧Diffuser

40‧‧‧Reflecting film

41‧‧‧Glossy

50‧‧‧Reflection points

Claims (6)

[Item 1] A backlight module comprising:
a light source assembly that emits a light;
a light guide plate optically connected to the light source assembly, the light guide plate includes a light incident end for introducing the light, a light exiting surface for guiding the light, and a light transmitting surface for guiding the light and facing the light emitting surface;
a diffusing sheet that is disposed on the light-emitting surface and diffuses the light emitted from the light-emitting surface;
a reflecting sheet disposed on the light transmitting surface and reflecting the light emitted from the light transmitting surface; and a plurality of reflecting points protruding from the reflecting sheet, wherein the reflecting point is distributed on the reflecting sheet, so that the light is transmitted The light derived from the surface forms a reflected light source that returns to the light guide plate and diverge at the reflection point. [Item 2] The backlight module of claim 1, wherein the light source assembly comprises a lamp cover and a light source, the lamp cover has an accommodating space and an opening communicating with the accommodating space and facing the light incident end, The light source is disposed in the accommodating space and emits the light toward the opening. [Item 3] The backlight module of claim 1, wherein the retroreflective sheeting has a light-facing surface facing the light-transmissive surface, and the reflecting point is disposed on the light-incident surface. [Item 4] The backlight module of claim 1, wherein the reflection point is circular, and the single reflection point has a diameter of 0.12 to 0.15 mm, and the adjacent reflection points have a range of 0.05 to 0.3mm pitch. [Item 5] The backlight module of claim 1, wherein a part of the reflection point is arranged along a first line on the reflective sheet, and a part of the reflection point is on the reflective sheet along a second adjacent to the first line and parallel to the first line. The lines are arranged in line, and the reflection point on the first line and the reflection point on the second line are aligned with each other. [Item 6] The backlight module of claim 1, wherein a part of the reflection point is arranged along a third line on the reflector, and a part of the reflection point is adjacent to the third line and adjacent to the third line. The fourth straight line is arranged, and the reflection point on the third line and the reflection point on the fourth line are mutually misaligned.