Backlight Module Ultra-Narrow Frame Design
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing liquid crystal display devices face challenges in achieving an ultra-narrow frame design due to incorrect positioning methods between the optical film and the plastic frame, which affects the narrow frame design requirements.
Innovation Solution
A backlight module design featuring a plastic frame, backplane, light guide, and optical film with a shading sheet and reflective sheet, where the optical film is positioned close to the upper surface of the plastic frame and light guide, and the shading sheet is applied on the optical film and backplane, creating a gap between the light guide and plastic frame, and a reflective sheet is placed on the light guide's lower surface to enhance light utilization and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the optical film is positioned away from the plastic frame, then the positioning is easier and more stable, but the frame width increases
Solution Approach 1:
The patent introduces a shading tape as an intermediary component between the optical film and the plastic frame. The shading tape serves as a positioning mediator that allows the optical film to be closely positioned to the plastic frame while maintaining manufacturing precision through the tape's adhesive properties and structural intermediary role.
Solution Approach 2:
The patent employs a flexible shading tape with adhesive properties to position the optical film close to the plastic frame. The flexible nature of the tape allows it to conform to the frame surface while maintaining precise positioning, enabling the ultra-narrow frame design without compromising positioning accuracy.
2Length of moving object
If the plastic frame size is reduced, then the frame becomes ultra-narrow, but the structural stability may be compromised
Solution Approach 1:
The patent segments the backlight module into distinct functional components: the plastic frame, the optical film, the shading tape, and the reflective sheet. This segmentation allows each component to perform its specific function while maintaining overall structural stability even with a reduced frame width.
Solution Approach 2:
The patent employs composite material structures, particularly in the shading tape which combines adhesive properties with structural functionality. This composite approach allows the frame to maintain stability despite reduced dimensions, as the adhesive composite materials provide both structural support and positioning functions.
3Length of moving object
If the optical film is closely positioned to the plastic frame, then the frame width is reduced, but the positioning difficulty increases
Solution Approach 1:
The shading tape acts as an intermediary that simplifies the positioning process. Instead of directly positioning the optical film to the plastic frame, the tape serves as a mediator that provides adhesive bonding and positioning guidance, making the manufacturing process easier while achieving close positioning.
Solution Approach 2:
The shading tape is pre-positioned and adhered to the plastic frame before the optical film is installed. This preliminary action establishes a stable positioning baseline that facilitates the subsequent attachment of the optical film, reducing positioning difficulty even when close positioning is required.
4Length of moving object
If the frame width is reduced, then the display device meets narrow frame requirements, but the light distribution uniformity may be affected
Solution Approach 1:
The patent converts the potential harm of close positioning (which could cause light distribution issues) into a benefit by introducing the reflective sheet. The reflective sheet reflects light back toward the display, compensating for the reduced frame width and maintaining uniform light distribution across the display surface.
Solution Approach 2:
The patent changes the optical parameters of the system by introducing the reflective sheet with specific reflectivity properties. This parameter change in the optical path compensates for the geometric changes caused by frame width reduction, maintaining uniform light distribution through adjusted optical parameters rather than geometric adjustments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design effectively reduces the plastic frame size, achieving an ultra-narrow frame by optimizing the positioning of components and improving light distribution, thereby meeting the requirements for narrow frame designs in display devices.
Implementation Method 1
the reflective sheet is provided on the lower surface of the light guide and is close to the horizontal plate
Implementation Method 2
the shading sheet is pasted on the upper surface and the side surface of the optical film
Data Source
AI summary
The present invention discloses a backlight module, which comprises a plastic frame, a backplane, a light guide and an optical film, the backplane comprises a mutually perpendicular vertical plate and horizontal plate, the plastic frame and the light guide are provided inside the backplane, the optical film is close to the upper surface of the plastic frame and the light guide. The present invention further provides a display device, which reduces the size of the plastic frame through pasting the optical film on the upper surface of the plastic frame and the light guide, achieving the ultra-narrow frame design.