Transparent Support Wall for LCD Backlight Uniformity
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Solution Overview
Problem
The existing planar light-source apparatus for liquid crystal displays faces issues with damage to the supporting structure during manufacturing and transportation, and generates dust and uneven brightness due to the contact between the diffusing plate and the brace, leading to potential luminance non-uniformity.
Innovation Solution
A planar light-source apparatus with a support wall made of transparent material, featuring uneven surfaces or bonded diffusing films, which supports the diffusing plate without direct contact, reducing the risk of damage and dust generation, and ensures even light distribution by diffusing light within the support wall.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a columnar or conical brace is used to support the diffusing plate, then the diffusing plate can be supported during manufacturing and transportation, but the brace may be damaged due to excessive force and generate dust from contact with the diffusing plate
Solution Approach 1:
A support wall made of transparent material is introduced as an intermediary structure between the brace and the diffusing plate. The support wall has a top face that lies adjacent to the diffusing plate without direct contact, while the brace supports the support wall. This intermediary structure prevents direct contact between the brace and diffusing plate, eliminating dust generation while maintaining support reliability.
Solution Approach 2:
The support wall replicates the supporting function of the brace but with improved properties. Instead of the brace directly contacting the diffusing plate, the support wall creates a contactless support system where the top face is positioned adjacent to the diffusing plate, preventing dust generation while maintaining structural support.
2Reliability
If a columnar or conical brace is used to support the diffusing plate, then the diffusing plate can be supported, but uneven brightness is generated due to the shadow of the brace
Solution Approach 1:
The support wall acts as an intermediary that eliminates the shadow problem. By positioning the top face of the support wall adjacent to the diffusing plate without direct contact, and making the support wall transparent, the structure no longer blocks light paths, thereby eliminating uneven brightness caused by shadows while maintaining support function.
Solution Approach 2:
The support wall is made of transparent material, changing its optical properties from opaque (as in traditional braces) to transparent. This allows light to pass through the support structure without being blocked, eliminating shadow effects and ensuring uniform brightness across the diffusing plate.
3Reliability
If the end extremity of the brace comes in contact with the diffusing plate, then the diffusing plate can be supported, but damage to the diffusing plate and brace can occur
Solution Approach 1:
The support wall serves as an intermediary structure that prevents direct contact between the brace and the diffusing plate. The brace supports the support wall, and the top face of the support wall lies adjacent to the diffusing plate without contact, eliminating the risk of damage to both the diffusing plate and brace while maintaining support reliability.
Solution Approach 2:
The support wall provides a cushioning layer between the brace and the diffusing plate. Even though the top face of the support wall does not directly contact the diffusing plate, it creates a protective barrier that prevents excessive force from being transmitted to the diffusing plate, thereby preventing damage beforehand.
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 solution enhances the durability of the support structure, prevents dust accumulation, and maintains even brightness by diffusing light within the support wall, thereby improving the overall performance and quality of the liquid crystal display.
Implementation Method 1
light emitted from the light source provided in the light-source unit is diffused on a first side facing the light source of the support wall, and incident light in the interior of the support wall from the first side of the support wall is emitted from a second side opposing the first side of the support wall and from the top face of the support wall
Data Source
AI summary
A planar light-source apparatus illuminates, from the backside, a transmissive liquid crystal display having a display area composed of pixels formed in a two-dimensional matrix arrangement, and the planar light-source apparatus includes a diffusing plate facing the liquid crystal display, a plurality of planar light-source units, each unit having a light source, and a support wall arranged between the planar light-source units for supporting the diffusing plate, and the top face of the support wall lies adjacent to the diffusing plate.