CN102980098A - Backlight module and display device - Google Patents

Abstract

The invention discloses a backlight module, comprising: a frame, light sources arranged on two opposite inner side walls of the frame, a backboard arranged under the frame and fixedly connected thereto, the backboard The main body has a reflection function, and its cross-sectional structure includes: two arches arranged side by side and protruding toward the backside of the backlight module, and the arrangement direction of the two arches is perpendicular to the inner wall where the light source is arranged. In the backlight module provided by the present invention, there is no light guide plate or diffusion plate, the structure is simpler, and the manufacturing cost is correspondingly reduced. The invention also discloses a display device comprising the above-mentioned backlight module.

Description

Backlight module and display device

technical field

The invention relates to the field of display technology, in particular to a backlight module and a display device including the backlight module.

Background technique

The backlight module is one of the key components of the liquid crystal display device. Since the liquid crystal itself does not emit light, the main function of the backlight module is to provide a uniform and high-brightness illuminant for the liquid crystal panel. The illuminant is converted into a surface luminous product with high brightness and uniform gray scale through an effective light mechanism, so that the liquid crystal panel can display images normally. In addition to being used in LCD TVs and liquid crystal display devices, backlight modules can also be used in display devices that require backlights such as digital photo frames, electronic paper, and mobile phones.

The backlight modules in the prior art are divided into side-emitting backlight modules and direct-lit backlight modules, wherein the side-emitting backlight modules include: a frame, a light source arranged on the inner wall of the frame, and a support connected to the frame. The functional planar structure of the back plate and the optical film that can gain light and have a certain degree of haze also includes a light guide plate for supporting the optical film and scattering light. The direct-type backlight module includes: a frame, a backplane with a supporting planar structure connected to the frame, a light source arranged above the backplane, and an optical film that increases light and has a certain degree of haze. Optical diaphragm and diffuser plate to scatter light. It can be known from the above that the backlight modules in the prior art all have a light guide plate or a diffuser plate for supporting the optical film and scattering light, the structure of which is relatively complicated and the cost is high.

To sum up, how to simplify the structure of the backlight module and reduce the cost is an urgent problem to be solved by those skilled in the art.

Contents of the invention

In view of this, the first object of the present invention is to provide a backlight module. Compared with the prior art, the structural design of the backlight module omits the light guide plate or the diffusion plate, the structure is simpler, and the manufacturing cost is reduced. The second object of the present invention is to provide a display device comprising the above-mentioned backlight module.

In order to achieve the above object, the present invention provides the following technical solutions:

A backlight module, comprising: a frame, light sources arranged on two opposite inner walls of the frame, and further comprising:

The backplane arranged under the frame and fixedly connected with it, the body of the backplane has a reflection function, and its cross-sectional structure includes: two arches arranged side by side and protruding toward the back side of the backlight module, the two The arrangement direction of the two arches is perpendicular to the inner wall where the light source is arranged.

Preferably, in the above backlight module, the backplane is a white plastic backplane.

Preferably, in the above backlight module, the backplane is a metal backplane, and its inner wall is covered with a reflective layer.

Preferably, in the above backlight module, the reflective layer is a PEP reflective layer.

Preferably, in the above backlight module, the curvature radius of the arch is 190 mm.

Preferably, in the above backlight module, the height difference between the lowest point of the arch and the edge of the arch is 33.74 mm.

Preferably, in the above-mentioned backlight module, the frame and the backplane are integrally structured.

The backlight module also includes: an optical film that can be arranged on the lower polarizer of the display screen used in conjunction with the backlight module.

Preferably, in the above backlight module, the optical film is a diffusion film and/or a prism film.

More preferably, the optical film is a composite film material with functions of diffusing and concentrating light.

A display device, comprising a display screen and the backlight module described in any one of the foregoing technical solutions.

Preferably, in the above display device, the optical film is attached to the lower polarizer of the display screen.

When applying the backlight module provided by the present invention, the light emitted from the light sources arranged on the two opposite side walls of the frame directly irradiates or reflects on the arched structure of the body of the back plate, because the body of the back plate has a reflection function , so the light is directly irradiated or reflected on the arched structure of the body and can be directly reflected on the optical film, thereby achieving the purpose of breaking up the light. In addition, the optical film in the present invention can be arranged on the lower polarizer of the display screen used in conjunction with the backlight module, and does not need to be supported by a diffusion plate or a light guide plate. To sum up, in the backlight module provided by the present invention, there is no light guide plate or diffusion plate, the structure is simpler, and the manufacturing cost is correspondingly reduced.

In order to achieve the above-mentioned second object, the present invention also provides a display device comprising any one of the above-mentioned backlight modules. Since the above-mentioned backlight module has the above-mentioned technical effects, the installation device having the backlight module should also have corresponding technical effects.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

1 is a side view of a backlight module provided by an embodiment of the present invention;

Fig. 2 is a schematic structural diagram of a backplane and a frame provided by an embodiment of the present invention;

Fig. 3 is a side view of the backplane and the frame provided by the embodiment of the present invention.

Among them, in Figure 1-Figure 3:

1-frame 2-light source 3-display

4-Optical film 5-Back plate 6-Reflective layer

Detailed ways

The first object of the present invention is to provide a backlight module. Compared with the prior art, the structural design of the backlight module omits the light guide plate or the diffuser plate, the structure is simpler, and the manufacturing cost is reduced. The second object of the present invention is to provide a display device comprising the above-mentioned backlight module.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

As shown in FIG. 1, FIG. 2 and FIG. 3, the backlight module provided by the embodiment of the present invention includes a frame 1, a light source 2 arranged on two opposite inner side walls of the frame 1, and arranged under the frame 1. And the back plate 5 fixedly connected with it, the body of the back plate 5 has a reflection function, and its cross-sectional structure includes: two arches arranged side by side and protruding to the back side of the backlight module, the arrangement of the two arches The direction is perpendicular to the inner wall on which the light source 2 is arranged.

Usually, the backlight module also includes: an optical film 4 that can be arranged on the lower polarizer of the display screen used in conjunction with the backlight module.

When the backlight module provided by the embodiment of the present invention is applied, the light emitted from the light source 2 arranged on the two opposite side walls of the frame 1 is directly irradiated or reflected on the arched structure of the body of the back plate 5. The body of the plate 5 has a reflective function, so light directly irradiated or reflected on the arched structure of the body can be directly reflected on the optical film 4, thereby achieving the purpose of scattering the light. In addition, the optical film 4 in the present invention can be arranged on the lower polarizer of the display screen 3 used in conjunction with the backlight module, and does not need to be supported by a diffusion plate or a light guide plate. To sum up, in the backlight module provided by the present invention, there is no light guide plate or diffusion plate, the structure is simpler, and the manufacturing cost is correspondingly reduced.

Wherein, the light source 2 can be an LED (Light Emitting Diode, light-emitting diode) lamp, and the light source 2 can be directly embedded on the inner wall of the frame 1, or can be arranged on the inner wall of the frame 1 by clamping or threaded connection.

In the above embodiment, the backboard 5 can be a white plastic backboard. The white plastic itself has the function of reflecting light, and the price is relatively low. Using white plastic to process the backplane 5 not only satisfies the reflection function of the backplane 5, but also Reduced processing costs.

In this embodiment, the back plate 5 can also use a metal back plate, and at the same time, in order to meet the reflection function of the back plate 5, a reflective layer 6 is covered on the inner wall of the back plate 5. In this way, the reflections reflected by the metal back plate The utilization of light is higher than that reflected by the white plastic backplane. Wherein, the reflective layer 6 may be a PEP (phosphoenolpyruvate, phosphoenolpyruvate) reflective layer, and PEP has stable performance and is easier to process and shape. Of course, the reflective layer 6 can also be made of PC (Polycarbonate, polycarbonate) material, which is not limited here.

After many experiments, it is concluded that when the curvature radius of the arch of the cross-sectional structure of the backplane 5 body can be 190mm, and the height difference between the lowest point of the arch and the edge of the arch is 33.74mm, the effect of optical simulation is the best . Therefore, preferably, the radius of curvature of the arch can be set to 190 mm, and further the height difference between the lowest point of the arch and the edge of the arch can be set to 33.74 mm.

In this embodiment, in order to further simplify the structure and manufacturing process of the backlight module, the frame 1 and the backplane 5 can be provided as an integrated structure. With such an arrangement, the frame 1 and the back plate 5 can be processed through integral molding, without having to process the frame 1 and the back plate 5 separately, and then fix the two together, thus simplifying the manufacturing process accordingly.

Preferably, the optical film 4 is a diffusion film and/or a prism film, and the optical film 4 is a composite film having functions of diffusing and concentrating light.

Based on the backlight module provided in the above-mentioned embodiment, the embodiment of the present invention also provides a display device, the display device includes any one of the above-mentioned backlight module, since the display device adopts the backlight module in the above-mentioned embodiment, Therefore, for the beneficial effect of the display device, please refer to the above-mentioned embodiments.

Wherein, in the structure of the display device of the above-mentioned embodiment, the optical film 4 can be attached on the lower polarizer of the display screen 3, and it can be pasted by glue. The screen 3 is molded together and is not limited again.

In addition, the above-mentioned display device can be any product or component with a display function, such as a liquid crystal panel, an electronic paper, an OLED panel, a liquid crystal TV, a liquid crystal display, a digital photo frame, a mobile phone, and a tablet computer.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (12)

1. backlight module comprises: framework, be arranged at the light source on two relative madial walls of described framework, it is characterized in that, also comprise:

Be arranged at the below of described framework and the backboard that is fixedly connected with it, the body of described backboard has reflection function, and its cross section structure comprises: two are arranged side by side and protruding arch to the backlight module dorsal part, and the orientation of described two arches is perpendicular to the madial wall that is provided with described light source.

2. backlight module according to claim 1 is characterized in that, described backboard is the white plastic backboard.

3. backlight module according to claim 1 is characterized in that, described backboard is metal backing, and is covered with the reflecting layer on its inwall.

4. backlight module according to claim 3 is characterized in that, described reflecting layer is the PEP reflecting layer.

5. backlight module according to claim 1 is characterized in that, the radius of curvature of described arch is 190mm.

6. backlight module according to claim 1 is characterized in that, the minimum point of described arch and the difference in height of described arch edge are 33.74mm.

7. backlight module according to claim 1 is characterized in that, described framework and described backboard are the integral type structure.

8. backlight module according to claim 1 is characterized in that, also comprises: can be arranged at the blooming piece on the lower polaroid of the display screen that is used with this backlight module.

9. backlight module according to claim 1 is characterized in that, described blooming piece is diffusion barrier and/or prism film.

10. backlight module according to claim 1 is characterized in that, described blooming piece is the compound film material with diffusion and optically focused effect.

11. a display unit comprises display screen and backlight module, it is characterized in that, described backlight module is each described backlight module among the claim 1-10.

12. the display unit according to claim 11 is characterized in that, described blooming piece is attached on the lower polaroid of described display screen.

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