Integrated Support Backlight Unit for Slim Display Optical Distance
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Solution Overview
Problem
The challenge in maintaining a constant optical distance in slim display apparatuses to prevent LED mura while simplifying the assembly process, as the number of supporters increases complexity in the backlight unit.
Innovation Solution
A backlight unit design incorporating a bottom chassis, a printed circuit board with light sources, a first reflecting sheet, and an integrated support formed using vacuum forming or air pressure forming, which includes a plurality of supporters to support a diffusion plate, with additional reflecting sheets positioned between the integrated support and the diffusion plate to maintain optical distance and simplify assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the number of supporters is increased to maintain constant optical distance, then LED mura is prevented, but the assembling process becomes complicated
Solution Approach 1:
The patent combines multiple supporters into a single integrated support structure that is formed as one piece through vacuum forming or air pressure forming. This integrated support includes multiple supporter legs arranged in a matrix pattern, eliminating the need for separate supporter components and simplifying the assembly process while maintaining the constant optical distance required to prevent LED mura.
Solution Approach 2:
The patent changes the manufacturing method from traditional mechanical assembly of multiple supporters to a forming process (vacuum forming or air pressure forming) that creates the integrated support structure in one operation. This parameter change in the manufacturing approach reduces assembly complexity while maintaining the functional requirements.
2Length of moving object
If the display apparatus is made thinner, then the device becomes more compact, but maintaining constant optical distance becomes difficult
Solution Approach 1:
The integrated support is designed with multiple supporter legs arranged in a matrix pattern that extends across the backlight unit. This segmentation of the support function into multiple legs allows for precise control of optical distance at multiple locations simultaneously, maintaining consistency across the entire display area even in a thin configuration.
Solution Approach 2:
The integrated support acts as an intermediary structure between the light sources and the diffusion plate. It provides precise spacing and positioning that maintains constant optical distance, enabling the backlight unit to achieve thinness without compromising optical performance or causing LED mura.
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 allows for a thinner backlight unit assembly with reduced assembly time and complexity, maintaining optimal optical distance to prevent LED mura while ensuring efficient light distribution to the display panel.
Implementation Method 1
a first reflecting sheet which is positioned on the printed circuit board and reflects light radiated from the light sources
Implementation Method 2
a second reflecting sheet positioned on the integrated support and between the integrated support and the diffusion plate
Implementation Method 3
a diffusion plate which is disposed to be spaced apart from the light sources so that light radiated from the light sources pass through the diffusion plate
Data Source
AI summary
A backlight unit for a display apparatus is disclosed. For example, the backlight unit including an integrated support for a display apparatus is disclosed. A disclosed example provides the backlight unit for a display apparatus including the integrated support which enables a thin display apparatus using the backlight unit including the integrated support.