LCD Backlight Structural Integration for Thickness Reduction
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Solution Overview
Problem
Conventional LCD designs with multiple frames and inner covers increase the thickness, weight, and manufacturing costs, making them inconvenient for carrying and assembling.
Innovation Solution
The design eliminates the inner cover and optimizes the use of frames and bezels to reduce thickness and weight by positioning the reflection sheet directly on the outer cover, with a bezel that encloses the backlight module and liquid crystal panel, and using a frame to support the liquid crystal panel and lock optical films, thereby reducing the need for additional frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If an inner cover is disposed between the reflection sheet and the outer cover to define the edge reflector, then the structural integrity is improved, but the thickness and weight of the LCD increase
Solution Approach 1:
The patent removes the inner cover component entirely from the LCD structure. Instead of having an inner cover between the reflection sheet and outer cover, the design uses the outer cover itself in combination with a bezel to define the edge reflector containing space, thereby eliminating the unnecessary component that added weight and thickness.
Solution Approach 2:
The outer cover is given multiple functions: it serves as both the protective outer shell and as part of the structural definition for the edge reflector containing space when combined with the bezel. This multi-functionality eliminates the need for separate inner cover components while maintaining structural integrity.
2Reliability
If multiple frames are disposed between the outer cover and bezel to fix the edge reflector and other parts, then the fixing reliability is improved, but the thickness, weight, and manufacturing cost increase
Solution Approach 1:
The patent merges the functions of multiple frames into a single integrated bezel structure. The bezel is designed to fix the edge reflector, light source, and other components simultaneously, eliminating the need for multiple separate frames while maintaining fixing reliability.
Solution Approach 2:
The bezel serves multiple functions: it fixes the edge reflector, supports the light source, and provides structural support for the backlight module. This multi-functional design replaces multiple specialized frames with a single universal component, reducing complexity while maintaining reliability.
3Manufacturing precision
If an inner cover extends from under the light source to over the light source to define the edge reflector, then the positioning precision is improved, but the thickness and weight increase
Solution Approach 1:
The patent removes the inner cover that extended across the light source area. Instead, the edge reflector containing space is defined by the combination of the outer cover and bezel structure, which provides adequate positioning precision without requiring the light source-spanning inner cover, thereby reducing thickness.
4Strength
If an inner cover is disposed between the reflection sheet and the outer cover, then the structural support is improved, but the assembling time and manufacturing cost increase
Solution Approach 1:
The patent merges the structural support function of the inner cover into the integrated bezel structure. The bezel provides the necessary structural support for the backlight module components without requiring assembly of separate inner cover pieces, thereby reducing assembling time and complexity.
Solution Approach 2:
The bezel provides multiple functions including structural support, component fixation, and edge reflector definition simultaneously. This eliminates the need for separate inner cover components that would require additional assembly steps, improving productivity while maintaining structural strength.
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 configuration results in a lighter, thinner LCD with reduced assembling time and manufacturing costs, while maintaining sufficient luminance and structural integrity.
Implementation Method 1
a reflection sheet for reflecting a light beam into a light guide plate (LGP) in the backlight module
Implementation Method 2
an edge reflector... wherein a containing space is defined by the outer cover and the edge reflector
Data Source
AI summary
A liquid crystal display (LCD) includes an outer cover, a backlight module, a liquid crystal panel, and a bezel. The backlight module includes a reflection sheet, a light guide plate (LGP), an edge reflector, and a light source. The reflection sheet is disposed on the outer cover and faces the outer cover. There is an interval between the outer cover and the reflection sheet. The LGP is stacked on the reflection sheet and the edge reflector is disposed on the outer cover, wherein a containing space is defined by the outer cover and the edge reflector. The light source is disposed in the containing space. The liquid crystal panel is stacked on the LGP. The bezel is assembled to the outer cover. The outer cover and the bezel enclose the backlight module and the liquid crystal panel and the bezel exposes the liquid crystal panel.