Backlight structure with micro-structure reflecting layer back plate

Abstract

The backlight structure comprises the back plate serving as a metal base material, an LED light source is arranged on one side in the back plate, microstructures and a reflecting layer forming light reflection are evenly arranged at the bottom in the back plate, the back plate and the reflecting layer are of an integrated structure, a light guide plate is arranged on the reflecting layer, and the light guide plate is arranged on the reflecting layer. And an optical film is arranged on the light guide plate. The back plate is directly used as a metal base material of an original reflector plate, and the microstructures are uniformly arranged at the bottom in the back plate to form a reflecting layer for light reflection, so that the reflectivity of the backlight structure is improved, the heat resistance of the backlight structure is greatly improved, and the service life of the backlight structure is prolonged.

Description

Technical Field

[0001] The invention relates to a backlight structure with a microstructured reflective layer back plate. Background Art

[0002] At present, the traditional backlight structure is mostly composed of a back plate, an LED light source, a reflector, a light guide plate and an optical film, and the back plate and the reflector are mostly split structures, such as Figure 1 As shown in the figure, most reflectors are made of white PET, ESR film, and metal substrates, which have the following disadvantages: 1. Traditional reflectors have high manufacturing costs, especially for large-size ESR film, where the material cost accounts for a significant proportion; 2. They have poor heat resistance. Traditional reflectors are prone to heat aging and yellowing under the high power density of MiniLEDs. When the temperature exceeds 80°C, the reflectivity of traditional reflectors decreases by more than 5%; 3. They have low reflectivity. The reflectivity of traditional metal substrate reflectors is usually less than 85%, and they lack the ability to control the optical path. Summary of the Invention

[0003] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of this application to avoid obscuring the purpose of this section, the abstract and the title of the invention, and such simplifications or omissions should not be used to limit the scope of the present invention.

[0004] The technical problem to be solved by the present invention is how to improve the reflectivity of the backlight structure.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a backlight structure with a backplane with a microstructured reflective layer, comprising a backplane as a metal substrate, an LED light source arranged on one side of the backplane, and microstructures evenly arranged on the bottom of the backplane to form a reflective layer for reflecting light. The backplane and the reflective layer are an integrated structure, which not only improves the overall structural strength of the backlight structure, but also improves the reflectivity of the reflected light. A light guide plate is arranged on the reflective layer, and an optical film is arranged on the light guide plate.

[0006] As a preferred solution of the backlight structure of the backplane with a microstructure reflective layer described in the present invention, the cross-sectional shape of each of the microstructures is an inverted pyramid, and the inclination angle of the microstructure is 100°-120°, so that the reflected light can be vertical, with a depth of 3-6um, which is easy to manufacture.

[0007] As a preferred solution of the backlight structure of the backplane with a microstructured reflective layer described in the present invention, the density of the microstructures is greater than 80 / mm2 to improve the light reflection efficiency and uniformity.

[0008] As a preferred solution of the backlight structure of the backplane with microstructured reflective layer described in the present invention, a SiO2 multilayer film is deposited on the surface of the microstructure to form an optical enhancement layer to improve the reflectivity of the reflective layer.

[0009] As a preferred solution of the backlight structure of the backplane with microstructured reflective layer of the present invention, the optical enhancement layer has 5 or more layers and a thickness of 200-500 nm, which further improves the reflectivity of the reflective layer.

[0010] As a preferred solution of the backlight structure with a microstructured reflective layer backplane described in the present invention, the backplane is made of aluminum, which improves the overall structural strength of the backlight structure. At the same time, aluminum itself has a high reflectivity and reduces the production cost of the backlight structure.

[0011] The beneficial effects of the present invention are:

[0012] 1. By using the backplane directly as the metal substrate of the original reflective sheet and evenly arranging microstructures on the bottom of the backplane to form a reflective layer for light reflection, not only the reflectivity of the backlight structure is improved, but also the heat resistance of the backlight structure is greatly improved, thus extending the service life;

[0013] 2. In the traditional backlight structure, the back plate and reflector adopt a double-layer split structure. This backlight structure improves the overall structural strength of the backlight structure by designing the back plate and reflector into an integrated structure. The microstructure is used to optimize the light angle, thereby improving the utilization rate and uniformity of light.

[0014] 3. The back panel is made of aluminum, which not only has a high reflectivity, but also reduces the production cost of the backlight structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort. Among them:

[0016] Figure 1 Schematic diagram of the overall structure of the traditional backlight structure.

[0017] Figure 2 Schematic diagram of the overall structure of the backlight structure with a microstructured reflective layer backplane.

[0018] Figure 3 Schematic diagram of the position structure of the reflective layer composed of microstructures.

[0019] Figure 4Schematic diagram of light reflected by the reflective layer of the backplane.

[0020] In the figure: 1. Back panel; 2. LED light source; 3. Reflector; 4. Light guide plate; 5. Optical film; 6. Reflective layer. DETAILED DESCRIPTION

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0022] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive of other embodiments.

[0024] Example

[0025] Reference Figures 2-4 This embodiment provides a backlight structure with a microstructured reflective layer backplane, including a backplane 1 as a metal substrate, an LED light source 2 is arranged on one side of the backplane 1, microstructures are evenly arranged on the bottom of the backplane 1, forming a reflective layer 6 for reflecting light, the backplane 1 and the reflective layer 6 are an integrated structure, a light guide plate 4 is arranged on the reflective layer 6, and an optical film 5 is arranged on the light guide plate 4.

[0026] The back panel 1 as a whole is a frame structure with an open top, which directly serves as a metal base for reflection in the backlight structure to replace the base material layer in the traditional reflective sheet 3. An LED light source 2 is installed on the left side of the back panel 1 to irradiate sufficient light. A uniform microstructure is formed on the lower surface of the back panel 1 by etching to form a reflective layer 6 for light reflection. In other embodiments, an impact method can also be used. In the backlight structure of this embodiment, the back panel 1 and the reflective layer 6 are an integrated structure, which not only improves the overall structural strength of the backlight structure, but also improves the reflectivity of light reflection. A light guide plate 4 is installed on the upper part of the reflective layer 6, and an optical film 5 is installed on the upper part of the light guide plate 4. In this embodiment, the back panel 1 is directly used as the metal base material of the original reflective sheet 3, and microstructures are evenly arranged on the bottom of the back panel 1 to form a reflective layer 6 for light reflection. This not only improves the reflectivity of the backlight structure, but also greatly improves the heat resistance of the backlight structure, thereby extending the service life.

[0027] Furthermore, the cross-sectional shape of each microstructure is an inverted pyramid, the inclination angle of the microstructure is 100°-120°, and the depth is 3-6 μm.

[0028] This embodiment refers to the microstructure of the high-brightness light guide plate 4, and the cross-sectional shape of each microstructure is designed to be an inverted pyramid. The inclination angle of the microstructure is 100°-120°, so that the reflected light can be as vertical as possible. The depth of the microstructure is 3-6um to facilitate the formation of the microstructure.

[0029] Furthermore, the density of the microstructures is greater than 80 / mm2.

[0030] In this embodiment, the density of the microstructures on the inner lower surface of the back plate 1 is greater than 80 / mm2, which further improves the reflection efficiency and uniformity of light.

[0031] Furthermore, a SiO2 multilayer film is deposited on the surface of the microstructure to form an optical enhancement layer.

[0032] In this embodiment, a SiO2 multilayer film is deposited on the surface of the microstructure to form an optical enhancement layer, thereby further improving the reflectivity of light. In other embodiments, a TiO2 multilayer film may also be deposited on the surface of the microstructure.

[0033] Furthermore, the number of the optical enhancement layer is greater than or equal to 5 layers, and the thickness is 200-500 nm.

[0034] The number of optical enhancement layers in this embodiment is greater than or equal to 5 layers, and the thickness is 200-500 nm, which further improves the reflectivity of light.

[0035] Furthermore, the back plate 1 is made of aluminum.

[0036] The material of the back plate 1 in this embodiment is aluminum with a thickness of 0.1-0.5 mm to improve the overall structural strength of the backlight structure. At the same time, aluminum itself has a high reflectivity and reduces the production cost of the backlight structure.

[0037] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A backlight structure having a microstructured reflective layer backplane, characterized in that: The invention comprises a back plate (1) as a metal substrate, an LED light source (2) is arranged on one side of the back plate (1), a microstructure is evenly arranged on the bottom of the back plate (1), and a reflective layer (6) for reflecting light is formed, the back plate (1) and the reflective layer (6) are an integrated structure, a light guide plate (4) is arranged on the reflective layer (6), and an optical film (5) is arranged on the light guide plate (4).

2. The backlight structure with a microstructured reflective layer backplane according to claim 1, wherein: The cross-sectional shape of each microstructure is an inverted pyramid, the inclination angle of the microstructure is 100°-120°, and the depth is 3-6 μm.

3. The backlight structure with a microstructured reflective layer backplane according to claim 2, wherein: The density of the microstructures is greater than 80 / mm2.

4. The backlight structure with a microstructured reflective layer backplane according to claim 2, wherein: A SiO2 multilayer film is deposited on the surface of the microstructure to form an optical enhancement layer.

5. The backlight structure with a microstructured reflective layer backplane according to claim 4, wherein: The optical enhancement layer has 5 or more layers and a thickness of 200-500 nm.

6. The backlight structure with a microstructured reflective layer backplane according to claim 1, wherein: The back plate (1) is made of aluminum.

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