Backlight Module Bearing Portion Concave Surface for Narrow Border
Solution Overview
Problem
Conventional backlight modules with front frames and rear covers cannot meet the requirements of high-end consumers for ultra-thin displays with narrow borders, as they affect the width and thickness of the display frame.
Innovation Solution
A backlight module design featuring a backplane with a bottom wall and side wall, a light guide plate, an optical film, and a plastic frame with a retaining wall and bearing portion, where the bearing portion's first surface protrudes towards the retaining wall, creating a concave surface to elongate the optical path and reduce light intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a conventional backlight module with front frame and rear cover is used, then the structural stability is improved, but the display thickness and border width increase
Solution Approach 1:
The patent removes the traditional front frame and rear cover structures from the backlight module, extracting only the essential functional components (light guide plate, optical films, and a simplified plastic frame) to achieve ultra-thin display design while maintaining structural stability through alternative support mechanisms
Solution Approach 2:
The patent employs thin-film optical components and a streamlined plastic frame structure to replace bulky conventional framing, enabling the display to achieve extreme thinness while preserving structural integrity through the functional design of the light guide plate and optical film assembly
2Ease of manufacture
If the first surface of the bearing portion is made flat, then the manufacturing simplicity is improved, but dark shadows appear at the display edges due to excessive light reflection
Solution Approach 1:
The patent applies a concave structure specifically at the first surface of the bearing portion where light reflection occurs, while maintaining other parts of the structure as simple and flat as possible. This localized modification reduces light reflection and eliminates dark shadows without complicating the overall manufacturing process
Solution Approach 2:
The patent converts the harmful effect of light reflection (which causes dark shadows) into a beneficial effect by using the concave structure to redirect reflected light away from the display edges, transforming the reflection problem into a solution that actively prevents shadow formation
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
The design effectively reduces dark shadows at the display's edges by minimizing light reflection and intensity, thereby improving the display's visual effect and achieving a narrower border.
Implementation Method 1
at least a portion of the first surface protrudes towards a side close to the retaining wall... elongate the optical path and reduce light intensity
Data Source
AI summary
A backlight module and a display apparatus are provided. The backlight module includes a backplane including a bottom wall and a side wall connected to define an accommodating portion; a light guide plate in the accommodating portion; an optical film on a side of the light guide plate away from the bottom wall; and a plastic frame including a retaining wall and a bearing portion, the retaining wall is arranged side by side with the side wall on a side of the side wall away from the light guide plate; the bearing portion is connected to the retaining wall on a side of the side wall and the optical film away from the bottom wall; the bearing portion includes a first surface away from the side wall and opposite to the retaining wall; at least a portion of the first surface protrudes towards a side close to the retaining wall.