Backlight module

Abstract

The utility model discloses a backlight module, which belongs to the technical field of screen display and comprises plastic iron, a reflector plate is arranged on the plastic iron, a light source and optical fiber rods which are arranged side by side are arranged on the reflector plate, and each optical fiber rod corresponds to one LED (light-emitting diode) in the light source; an optical film set is arranged on the optical fiber rod, and a shading assembly surrounding the light source is arranged above the rubber iron where the periphery of the optical film set is located. According to the backlight module, the brightness of the whole backlight module is improved through the distribution state of the LEDs and the optical fiber rods and the application of the optical film set, so that the backlight module effectively avoids interference of stray light while ensuring efficient transmission of light rays, and uniform, stable and high-quality backlight is provided for display equipment.

Description

Technical Field

[0001] The utility model belongs to the technical field of screen display and relates to a backlight module. Background Art

[0002] In today's era of rapid advancements in display technology, LCD (liquid crystal display) performance, as one of the mainstream display products, has always been a focus of industry attention. Brightness, a key factor influencing the visual experience, is subject to stringent requirements from end-users. With growing consumer demand for high-definition and high-brightness displays, effectively improving the brightness of LCD display products has become a critical issue that needs to be addressed in the development of display technology.

[0003] Currently, there are two main methods used in the industry to increase the brightness of LCD display products: one is to improve the transmittance of the display panel by optimizing the display panel structure and improving the materials; the other is to enhance the brightness output of the backlight module, using a more powerful light source to ensure display brightness. However, both methods face significant challenges in practical application.

[0004] As technology continues to advance, the room for improvement in display panel transmittance is shrinking, and further breakthroughs require high R&D costs and complex production processes. Meanwhile, increasing backlight module brightness has also encountered a bottleneck. Not only is the brightness gain limited, but it also comes with a significant increase in costs, placing significant market pressure on the product.

[0005] Therefore, based on the existing technology, designing a new backlight module solution to improve the brightness of LCD display products in a more efficient and economical way has become a technical problem that needs to be solved urgently in the industry. Utility Model Content

[0006] The purpose of the present invention is to provide a backlight module to solve the current problem of difficulty in improving the brightness of the backlight module and the cost.

[0007] The purpose of this utility model is achieved through the following technical solutions:

[0008] A backlight module includes a plastic iron, a reflective sheet is provided on the plastic iron, a light source and optical fiber rods are placed side by side on the reflective sheet, each of the optical fiber rods corresponds to an LED in the light source; an optical film group is provided on the optical fiber rod, and a shading component that encloses the light source is provided above the plastic iron where the periphery of the optical film group is located.

[0009] As a further improvement of an embodiment of the present invention, the optical film group is provided with a lower diffusion sheet, an upper diffusion sheet, a lower brightness enhancement sheet and an upper brightness enhancement sheet in sequence from bottom to top.

[0010] As a further improvement of an embodiment of the present invention, the lower diffusion sheet and the upper diffusion sheet are aligned vertically and are distributed with equal lengths; the lower brightness enhancement sheet and the upper brightness enhancement sheet are aligned vertically and are distributed with equal lengths.

[0011] As a further improvement of an embodiment of the present invention, the cross section of the optical fiber rod is a square structure or a semicircular structure.

[0012] As a further improvement of an embodiment of the present invention, a plurality of U-shaped grooves are provided on the rubber iron, and an LED and an optical fiber rod are provided in each of the U-shaped grooves.

[0013] As a further improvement of an embodiment of the present invention, the light source includes a light bar and an LED arranged on the light bar, and both ends of the light bar are respectively installed on one end of the optical fiber rod and the support base of the shading component through light glue.

[0014] As a further improvement of one embodiment of the present utility model, one end of the lower diffuser, upper diffuser, lower brightness enhancement sheet, upper brightness enhancement sheet, optical fiber rod and reflective sheet are aligned, the other end of the reflective sheet is exposed outside the optical fiber rod to form a first step for placing the LED, the other end of the optical fiber rod is exposed outside the lower diffuser to form a second step for placing one end of the light strip, and the other end of the upper diffuser is exposed outside the lower brightness enhancement sheet to form a third step for placing the support member.

[0015] As a further improvement of an embodiment of the present utility model, the shading assembly includes a support seat fixed at one end of the rubber iron, a support member placed on the third step, a first shading plate and a second shading plate, the first shading plate is arranged at the upper end of the light bar, and a mouth glue layer is arranged between the second shading plate and the first shading plate, the mouth glue layer extends to one side and covers the support member and extends to one side of the upper light-enhancing sheet.

[0016] As a further improvement of an embodiment of the present invention, one end of the rubber iron is bent upward and embedded in the support seat.

[0017] The above technical solution has the following beneficial effects: the brightness of the overall backlight module is improved through the distribution of LEDs, optical fiber rods and the application of optical film groups, so that the backlight module can effectively avoid the interference of stray light while ensuring efficient light transmission, providing the display device with uniform, stable and high-quality backlight. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can, without inventive effort, derive other implementation drawings based on the provided drawings.

[0019] The structures, proportions, sizes, etc. illustrated in this specification are intended solely to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, without affecting the efficacy and objectives of the present invention, shall remain within the scope of the technical contents disclosed herein.

[0020] Figure 1 This is a schematic diagram of the state structure provided by the utility model.

[0021] Figure 2 This is a schematic diagram of the optical fiber rod and LED distribution provided by the utility model.

[0022] Figure 3 This is a schematic diagram of the distribution of the optical fiber rod, LED, and glue-iron provided by the utility model.

[0023] Figure 4 The present invention provides a three-dimensional schematic diagram of an optical fiber rod.

[0024] Figure 5 This is a three-dimensional schematic diagram of another optical fiber rod provided by the utility model.

[0025] In the picture:

[0026] 1-LED;

[0027] 2-light bar;

[0028] 3-light glue;

[0029] 4- opening glue layer;

[0030] 5-optical film assembly; 51-upper brightness enhancement film; 52-lower brightness enhancement film; 53-upper diffusion film; 54-lower diffusion film;

[0031] 6-fiber rod;

[0032] 7-reflective sheet;

[0033] 8-Glue iron;

[0034] 9-support seat;

[0035] 10- second shading plate;

[0036] 11- support member;

[0037] 12-First shading plate. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0039] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0040] In the present invention, unless otherwise specified, directional words such as "up, down, top, bottom" are usually used with reference to the directions shown in the drawings, or with reference to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention. Example

[0041] See also Figure 1-Figure 5 As shown, a backlight module plays a key role in display devices, providing uniform and appropriate light for the screen. The adhesive iron 8 is a key support structure for the entire module. A reflective sheet 7 is placed above the adhesive iron 8. This reflective sheet 7 efficiently reflects light, reducing light loss and ensuring that light is fully utilized within the module.

[0042] A light source and fiber optic rods 6 are placed side by side on a reflective sheet 7. The LED 1 in the light source is the core lighting component, offering advantages such as high brightness, low power consumption, and long life. Each fiber optic rod 6 corresponds one-to-one with an LED 1. This precise correspondence ensures a clear and stable light transmission path. As a key component in light transmission, the fiber optic rod 6 transmits light emitted from the LED within it through the principle of total internal reflection, minimizing light loss during transmission and thus guiding and optimizing the light emitted from the LED.

[0043] The optical film assembly 5, mounted above the fiber optic rod 6, further processes the light. A light shielding assembly is also located above the adhesive iron 8 and around the optical film assembly 5. This shielding assembly encloses the light source, effectively blocking interference from external stray light and preventing light from leaking outward within the module, ensuring that light is concentrated in the desired area and improving light utilization efficiency.

[0044] Specifically, the optical film assembly 5 is provided with a lower diffusion sheet 54 , an upper diffusion sheet 53 , a lower brightness enhancement sheet 52 and an upper brightness enhancement sheet 51 in sequence from bottom to top.

[0045] The lower diffuser 54 is located at the bottom and serves to initially diffuse the light. After the light is transmitted from the optical fiber rod 6, the lower diffuser 54 disperses the relatively concentrated light, allowing it to evenly disperse in all directions, avoiding the formation of concentrated light spots and laying the foundation for subsequent optical processing.

[0046] Next is the upper diffuser 53, which further diffuses the light processed by the lower diffuser 54 in a more detailed manner, making the distribution of light on the entire plane more uniform and soft, reducing display defects that may be caused by uneven light distribution.

[0047] The lower brightness enhancement sheet 52 is located above the upper diffusion sheet 53. Its main function is to increase the brightness of the already uniform light. The lower brightness enhancement sheet 52 can effectively gather light, making the brightness of the light after passing through it stronger, thereby improving the light output efficiency of the entire backlight module.

[0048] Finally, the upper brightness enhancement sheet 51 further enhances the light brightness while also fine-tuning the light angle. This ensures that the output light is optimal in terms of brightness, uniformity, and angle, providing high-quality backlighting for the display device.

[0049] In the backlight module, the fiber optic rod 6 offers unique advantages. First, it transmits light more efficiently. This means that, given the same light source, it allows more light to be transmitted through it, reducing light loss during transmission. This allows the backlight module as a whole to receive more effective light, resulting in higher brightness. This is crucial for display quality; higher brightness results in clearer, more vivid images, providing users with a better visual experience.

[0050] like Figure 4 、 Figure 5 As shown, the cross-section of the optical fiber rod 6 is designed to be square or semicircular. A square cross-section allows for more regular arrangement and installation within the module, with the four right-angled sides better aligned with other components, ensuring module structural stability. Furthermore, this structure allows for more regular internal reflection angles during light transmission, improving light transmission efficiency.

[0051] When the optical fiber rod 6 has a semicircular cross-section, its curved surface can help converge light. After entering the optical fiber rod, light is more efficiently transmitted within the semicircular internal structure. This structure also provides a more concentrated light distribution, further improving the brightness of the backlight unit. Whether square or semicircular, both structures provide different perspectives for optimizing backlight unit performance.

[0052] Specifically, the rubber iron 8 is provided with several U-shaped grooves, each housing an LED 1 and an optical fiber rod 6. The U-shaped grooves provide stable and reasonable placement for the LEDs 1 and optical fiber rod 6. Specifically, the U-shaped grooves have dedicated snap-in locations for the LEDs 1 and optical fiber rod 6. This snap-in location ensures that the LEDs 1 and optical fiber rod 6 are securely positioned within the U-shaped grooves.

[0053] During installation, the LED 1 and fiber optic rod 6 can be precisely snapped into their corresponding snap-in positions, preventing them from moving or shaking during use, thereby ensuring stable and reliable light transmission. Furthermore, the U-shaped groove design also allows for more precise relative positioning of the various components, facilitating efficient light transmission from the LED 1 to the fiber optic rod 6, thereby improving the performance of the entire backlight unit. Furthermore, the provision of multiple U-shaped grooves allows for orderly arrangement of multiple LEDs 1 and fiber optic rods 6, ensuring uniform and stable illumination from the backlight unit and optimizing its overall performance.

[0054] In this embodiment, the light source includes a light bar 2 and an LED 1 mounted on the light bar 2. Both ends of the light bar 2 are secured together using light glue 3. One end of the light bar 2 is connected to one end of a fiber optic rod 6. This tight connection ensures that light emitted from the LED 1 on the light bar 2 is efficiently transmitted to the fiber optic rod 6. The fiber optic rod 6 optimizes and guides this light, providing a good foundation for subsequent light processing.

[0055] The other end of light bar 2 is mounted on support base 9 of the shading assembly. This provides a stable support point for light bar 2, allowing it to maintain a fixed position within the module. Connecting light bar 2 to support base 9 via light glue 3 not only ensures a secure connection but also reduces the effects of vibration and other factors on the light source. This design ensures a tight fit between the various components of the light source, improving light transmission efficiency while also ensuring the stability and reliability of the backlight module's overall structure, thus laying the foundation for high-quality light output from the backlight module.

[0056] Furthermore, one end of the lower diffuser 54, the upper diffuser 53, the lower brightness enhancement sheet 52, the upper brightness enhancement sheet 51, the optical fiber rod 6 and the reflective sheet 7 are aligned. This alignment ensures the continuity and stability of light during transmission.

[0057] The other end of the reflector 7 is exposed outside the fiber optic rod 6, forming a first step for the LED 1. This first step provides dedicated space for the LED 1. The other end of the fiber optic rod 6 is exposed outside the lower diffuser 54, forming a second step for one end of the light bar 2. This design makes the connection between the light bar 2 and the fiber optic rod 6 more natural and smooth, facilitating light transmission. The other end of the upper diffuser 53 is exposed outside the lower light-enhancing sheet 53, forming a third step for the support member 11.

[0058] In this embodiment, the shading assembly includes a support seat 9 fixed to one end of the adhesive iron 8, a support member 11 placed on the third step, a first shading plate 12, and a second shading plate 10. The first shading plate 12 is arranged at the upper end of the light bar 2, which can effectively block stray light from above the light bar 2 and ensure the purity of the light. A gap glue layer 4 is provided between the second shading plate 10 and the first shading plate 12. The gap glue layer 4 not only serves to connect the first shading plate 12 and the second shading plate 10, but also extends to one side and covers the support member 11 and extends to one side of the upper light-enhancing plate 51, thereby enhancing the integrity and sealing of the shading assembly. One end of the adhesive iron 8 is bent upward and embedded in the support seat 9. This design makes the connection between the adhesive iron 8 and the support seat 9 more firm and reliable, providing a stable foundation for the entire shading assembly.

[0059] In summary, the backlight module of the present invention effectively avoids the interference of stray light while ensuring efficient light transmission, thereby providing a uniform, stable and high-quality backlight for the display device.

[0060] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0061] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0062] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0063] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A backlight module, characterized in that: It includes a rubber iron, a reflective sheet is provided on the rubber iron, a light source and an optical fiber rod are placed side by side on the reflective sheet, and each optical fiber rod corresponds to an LED in the light source; an optical film group is provided on the optical fiber rod, and a shading component that encloses the light source is provided above the rubber iron where the periphery of the optical film group is located.

2. The backlight module according to claim 1, wherein: The optical film group is sequentially provided with a lower diffusion sheet, an upper diffusion sheet, a lower brightness enhancement sheet and an upper brightness enhancement sheet from bottom to top.

3. The backlight module according to claim 2, wherein: The lower diffusion sheet and the upper diffusion sheet are aligned vertically and are distributed with equal lengths; the lower brightness enhancement sheet and the upper brightness enhancement sheet are aligned vertically and are distributed with equal lengths.

4. The backlight module according to claim 1, wherein: The cross section of the optical fiber rod is a square structure or a semicircular structure.

5. The backlight module according to claim 3, wherein: The rubber iron is provided with a plurality of U-shaped grooves, and each of the U-shaped grooves is provided with an LED and an optical fiber rod.

6. The backlight module according to claim 5, wherein: The light source includes a light bar and an LED arranged on the light bar. The two ends of the light bar are respectively mounted on one end of the optical fiber rod and the support base of the shading component through light glue.

7. The backlight module according to claim 6, wherein: One ends of the lower diffuser, upper diffuser, lower brightness enhancement sheet, upper brightness enhancement sheet, optical fiber rod and reflective sheet are aligned, the other end of the reflective sheet is exposed outside the optical fiber rod to form a first step for placing the LED, the other end of the optical fiber rod is exposed outside the lower diffuser to form a second step for placing one end of the light strip, and the other end of the upper diffuser is exposed outside the lower brightness enhancement sheet to form a third step for placing the support member.

8. The backlight module according to claim 6, wherein: The shading assembly includes a support seat fixed at one end of the rubber iron, a support member placed on the third step, a first shading plate and a second shading plate. The first shading plate is arranged at the upper end of the light bar, and a rubber layer is arranged between the second shading plate and the first shading plate. The rubber layer extends to one side and covers the support member and extends to one side of the upper light-enhancing sheet.

9. The backlight module according to claim 7, wherein: One end of the rubber iron is bent upward and embedded in the support seat.

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