Backlight module with blue light barrier LED lamp plate
By non-uniformly arranging low-power and standard-power LEDs on the LED light board, and combining gradient spacing and software compensation, the blue edge problem in the backlight module was solved, achieving improved light efficiency uniformity and cost-effectiveness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING CHINA ELECTRONICS PANDA LIGHTING
- Filing Date
- 2025-07-04
- Publication Date
- 2026-06-23
AI Technical Summary
In existing technologies, the blue edge problem caused by blue LEDs in backlight modules seriously affects the uniformity of the display. Traditional solutions suffer from problems such as large loss of light efficiency, high cost or slow response speed. Furthermore, the blue edge problem is exacerbated by the gap tolerance between the lamp board and the diffuser plate and under high temperature conditions.
The LED light panel adopts a non-uniform arrangement structure, with low-power LEDs arranged in the outer edge area and standard-power LEDs arranged in the middle area. By gradually increasing the spacing between LEDs and dynamically adjusting the current through software compensation, combined with the design of the film and display panel, the light intensity concentration is improved.
It effectively reduces the width of the blue edge, lowers the edge color temperature deviation and the growth rate of the blue edge at high temperatures, improves the uniformity of light effect, and solves the blue edge problem while reducing costs and response speed.
Smart Images
Figure CN224400028U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a backlight module with an anti-blue edge LED light panel. Background Technology
[0002] Currently, blue LEDs (wavelength 450nm) are increasingly widely used in backlight modules, but the resulting blue edge problem (edge brightness significantly higher than the center area) seriously affects the uniformity of the display. Traditional solutions include: 1. Optical film shielding: solving the blue edge problem by adding light-shielding tape or a black matrix, but this results in a loss of more than 15% in luminous efficacy; 2. Diffuser adjustment: solving the blue edge problem by spraying phosphor around the backlight assembly, but this solution is costly; 3. Software compensation: solving the blue edge problem by dynamically adjusting the LED current, but the dynamic adjustment response speed is slow and the cost is high. In addition, when the fit gap tolerance between the lamp board and the diffuser plate is greater than ±0.1mm, the blue edge width will increase sharply; in high temperature (85℃) environments, blue light wavelength drift will also exacerbate edge light leakage; LED displacement under vibration conditions will also cause dynamic diffusion of the blue edge. Therefore, a new type of anti-blue edge LED lamp board structure is urgently needed to solve the above problems. Utility Model Content
[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.
[0004] The technical problem this invention aims to solve is how to better address the issue of blue edges appearing on LED light panels.
[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: a backlight module with an anti-blue edge LED light board, including a frame, an LED light board disposed within the frame, low-power LED beads arranged in the outer edge area of the LED light board, standard-power LED beads arranged in the middle area of the LED light board, and the LED beads on the LED light board are non-uniformly arranged to improve the light intensity concentration in the outer edge area of the LED light board, a display board disposed at the top of the frame, and a diaphragm disposed between the display board and the LED light board.
[0006] As a preferred embodiment of the backlight module with anti-blue edge LED light panel of this utility model, the spacing between adjacent LED beads on the LED light panel gradually increases from the middle area to the outer edge area. Compared with the traditional uniform layout, this layout improves the concentration of light intensity at the edge and better solves the blue edge problem caused by the LED light panel.
[0007] As a preferred embodiment of the backlight module with anti-blue edge LED light panel of this utility model, the spacing between adjacent LED beads in the middle area of the LED light panel is 4mm, and the spacing between adjacent LED beads gradually increases from 4mm in the middle area to 5.5mm in the outer edge area, so as to achieve a natural transition of light intensity.
[0008] As a preferred embodiment of the backlight module with anti-blue edge LED light panel described in this utility model, the power of the low-power LED beads is 70% of that of the standard power LED beads, so as to accurately balance the brightness of the array LED beads and improve the uniformity of light effect. The current of the low-power LED beads is generally 60mA, and the current of the standard power LED beads is generally 85mA.
[0009] Beneficial effects: By arranging low-power LEDs on the outer edge of the LED panel and standard-power LEDs in the middle, and by using a non-uniform arrangement of LEDs on the LED panel, the light intensity concentration on the outer edge of the LED panel is improved, thereby reducing the blue edge width of the backlight assembly. Attached Figure Description
[0010] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0011] Figure 1 This is a schematic diagram of the overall structure of a backlight module with an anti-blue edge LED light panel.
[0012] Figure 2 This is a structural diagram of an LED light board with anti-blue edge LED light board.
[0013] In the diagram: 1. Frame; 2. LED light board; 3. Low-power LED beads; 4. Standard-power LED beads; 5. Display board; 6. Diaphragm. Detailed Implementation
[0014] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.
[0015] Many specific details are set forth in the following description in order to provide 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 can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
[0016] Secondly, the term "an embodiment" or "embodiment" as used 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 different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.
[0017] Example
[0018] Reference Figure 1 and Figure 2 This embodiment provides a backlight module with an anti-blue edge LED light panel, including a frame 1, an LED light panel 2 disposed within the frame 1, low-power LED beads 3 arranged in the outer edge area of the LED light panel 2, and standard-power LED beads 4 arranged in the middle area of the LED light panel 2. The LED beads on the LED light panel 2 are arranged non-uniformly to improve the light intensity concentration in the outer edge area of the LED light panel 2. A display panel 5 is disposed on the top of the frame 1, and a diaphragm 6 is disposed between the display panel 5 and the LED light panel 2.
[0019] The frame 1 serves as the mounting base for the entire backlight module. An LED light board 2 is installed at the bottom of the frame 1. Low-power LED beads 3 are arranged in the outer edge area of the LED light board 2, and standard-power LED beads 4 are arranged in the middle area of the LED light board 2. The LED beads on the LED light board 2 are arranged non-uniformly to improve the light intensity concentration in the outer edge area of the LED light board 2, thereby reducing the blue edge width. A diaphragm 6 is installed on the top of the LED light board 2, and a display panel 5 is installed on the top of the diaphragm 6 (the top of the frame 1). In this embodiment, by arranging low-power LED beads 3 in the outer edge area of the LED light board 2, standard-power LED beads 4 in the middle area, and using a non-uniform arrangement of LED beads on the LED light board 2, the light intensity concentration in the outer edge area of the LED light board 2 is improved. This not only significantly reduces the blue edge width of the backlight assembly, but also significantly reduces the edge color temperature deviation and the growth rate of high-temperature blue edge.
[0020] Furthermore, the spacing between adjacent LED beads on the LED light panel 2 gradually increases from the middle area to the outer edge area.
[0021] In this embodiment, the spacing between adjacent LED beads on the LED light board 2 is set to gradually increase from the middle area to the outer edge area. Compared with the traditional uniform layout, this layout method improves the concentration of light intensity at the edge and better solves the blue edge problem generated by the LED light board 2.
[0022] Furthermore, the spacing between adjacent LED beads in the middle area of the LED light board 2 is 4mm, and the spacing between adjacent LED beads gradually increases from 4mm in the middle area to 5.5mm towards the outer edge area.
[0023] In this embodiment, the spacing between adjacent LED beads in the middle area of the LED light board 2 is set to 4mm, and the spacing between adjacent LED beads gradually increases from 4mm in the middle area to 5.5mm from the outer edge area. At the same time, software compensation is used to dynamically adjust the LED current to achieve a natural transition of light intensity. It should be noted that the software compensation method used in this embodiment is existing technology, so it will not be described in detail.
[0024] Furthermore, the power of the low-power LED 3 is 70% of that of the standard-power LED 4.
[0025] In this embodiment, the power of the low-power LED bead 3 is 70% of that of the standard power LED bead 4, so as to accurately balance the brightness of the array of LED beads and improve the uniformity of light effect. The current of the low-power LED bead 3 is generally 60mA, while the current of the standard power LED bead 4 is generally 85mA.
[0026] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.
Claims
1. A backlight module with an anti-blue edge LED light panel, characterized in that: The application relates to a frame (1) provided with an LED lamp plate (2), the outer edge area of the LED lamp plate (2) is arranged with low-power lamp beads (3), the middle area of the LED lamp plate (2) is arranged with standard-power lamp beads (4), the lamp beads on the LED lamp plate (2) are arranged in a non-uniform mode, the light intensity of the outer edge area of the LED lamp plate is improved, the top of the frame (1) is provided with a display plate (5), and a diaphragm (6) is arranged between the display plate (5) and the LED lamp plate (2). 2.The backlight module with the blue light barrier LED lamp panel of claim 1, wherein: The interval between the adjacent lamp beads on the LED lamp plate (2) gradually increases from the middle area to the outer edge area. 3.The backlight module with the blue light barrier LED lamp panel of claim 2, wherein: The interval between the adjacent lamp beads in the middle area of the LED lamp plate (2) is 4 mm, and the interval between the adjacent lamp beads gradually increases from 4 mm in the middle area to 5.5 mm in the outer edge area.
4. The backlight module with blue light barrier LED lamp panel of claim 3, wherein: The power of the low-power lamp beads (3) is 70% of the standard-power lamp beads (4).