Backlight Unit Reflection Frame Reduces Thickness
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Solution Overview
Problem
Conventional LCDs require a reflection sheet for backlight units, which increases assembly complexity and thickness due to tight tolerances between frames, and involves an additional coupling process.
Innovation Solution
A backlight unit design without a reflection sheet, utilizing a reflection frame with a reflection surface outside a fixing frame to reflect leaked light, reducing assembly tolerance and thickness, and simplifying the assembly process by eliminating the need for a separate reflection sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a reflection sheet is used in the backlight unit, then leaked light can be reflected, but the thickness of the display apparatus increases and assembly complexity increases due to tight tolerances
Solution Approach 1:
The reflection function is merged with the fixing frame by forming a reflection surface directly on the outer side of the fixing frame. This integration eliminates the need for a separate reflection sheet, thereby reducing the overall thickness while maintaining the light reflection function.
Solution Approach 2:
The fixing frame is given multiple functions: it not only holds the light guide plate and light emitting unit but also serves as a reflection surface for leaked light. This multi-functionality reduces the number of components and simplifies the structure.
2Loss of energy
If a reflection sheet is used in the backlight unit, then leaked light can be reflected, but the assembly process becomes more complex with additional coupling steps
Solution Approach 1:
The reflection function is merged with the fixing frame by forming a reflection surface directly on the outer side of the fixing frame. This integration eliminates the need for a separate reflection sheet, thereby reducing the overall thickness while maintaining the light reflection function.
Solution Approach 2:
The reflection sheet is extracted from the assembly, removing the need for a separate coupling process. The reflection function is achieved through the fixing frame itself, simplifying the assembly steps.
3Manufacturing precision
If tight assembly tolerance is maintained between fixing frame and reflection sheet, then proper alignment is achieved, but manufacturing difficulty increases
Solution Approach 1:
The reflection function is merged with the fixing frame by forming a reflection surface directly on the outer side of the fixing frame. This integration eliminates the need for a separate reflection sheet, thereby reducing the overall thickness while maintaining the light reflection function.
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 reduces the thickness of the display apparatus and simplifies the assembly process by minimizing the assembly tolerance between frames and omitting the reflection sheet coupling step, enabling thinner and more efficient LCDs.
Implementation Method 1
a reflection frame comprised at an outer side of the fixing frame and reflecting leaked light
Data Source
AI summary
Disclosed are a backlight unit and a display apparatus having the same. The backlight unit comprises a light guide plate receiving light and outputting the light, a light emitting unit comprised at an one end portion of the light guide plate, a fixing frame comprising an opened interior, in which the light emitting unit and the light guide plate are comprised in the opened interior, and a reflection frame comprised at an outer side of the fixing frame and reflecting leaked light.