Backlight Unit Mold Frame Inclined Surface Edge Luminance
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Solution Overview
Problem
Conventional backlight units often suffer from luminance uniformity issues, particularly at the edges of display devices, leading to reduced display quality due to the arrangement of light sources and optical components.
Innovation Solution
A backlight unit design that includes a mold frame with an inclined surface and a supporting member featuring an optical pattern, which enhances light distribution by creating a space between the mold frame and the optical plate, allowing for improved luminance at the edges and uniformity across the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light sources are disposed under the display panel in a direct-lit backlight unit, then the structure is simplified and manufacturing is easier, but luminance uniformity deteriorates due to dark spots at the edges
Solution Approach 1:
The patent applies local quality by creating a non-uniform structure in the mold frame - specifically, an inclined surface is formed only at the edge region (first sidewall) while other regions maintain conventional flat structures. This localized structural modification redirects light to edge areas without complicating the entire backlight unit design, thus improving luminance uniformity while maintaining manufacturing simplicity
Solution Approach 2:
The patent introduces a dimensional change by transforming the flat, two-dimensional mold frame into a three-dimensional structure with an inclined surface. This inclined surface creates a new spatial dimension for light redirection, allowing light to reach edge areas that would otherwise be dark spots, thereby improving luminance uniformity without compromising the straightforward manufacturing process
2Volume of moving object
If an optical plate is disposed directly on LED light sources, then the structure is more compact, but light distribution deteriorates causing reduced luminance at edges
Solution Approach 1:
The patent introduces the inclined surface of the mold frame as an intermediary element between the LED light sources and the optical plate. This intermediary structure redirects light before it reaches the optical plate, ensuring that edge areas receive adequate light. The optical plate remains directly positioned on the LED assembly, maintaining compactness while the inclined surface mediator solves the light distribution problem
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 significantly improves luminance uniformity by ensuring that light reaches the edges of the display panel more effectively, reducing dark spots and enhancing overall display quality.
Implementation Method 1
an inclined surface protruding obliquely downward and inward from an inner side surface of the first sidewall
Implementation Method 2
a supporting member disposed on the mold frame and comprising an optical pattern
Data Source
AI summary
A backlight unit and a display device including the same are provided. The backlight unit includes a light source; a mold frame configured to accommodate the light source and having a window frame shape with an opening therein; and a supporting member disposed on the mold frame and comprising an optical pattern, wherein the mold frame comprises a first sidewall, and an inclined surface protruding obliquely downward and inward from an inner side surface of the first sidewall, and wherein the supporting member is disposed on the inclined surface of the mold frame.