Backlight Partition Wall with Light-Penetrable Support
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Solution Overview
Problem
The existing backlight modules with partition structures for dynamic local dimming technology suffer from dark areas in the image due to the thickness of the partition walls, which affects the overall image quality.
Innovation Solution
A backlight module design featuring a first light-penetrable wall with a light reflective layer positioned between lighting areas, where the light reflective layer is supported by the first light-penetrable wall, allowing for partial or complete blocking of light to adjust brightness while minimizing the thickness of the reflective layer and reducing dark areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a partition structure with certain thickness is used to divide backlight areas, then the brightness interference between adjacent areas is reduced, but dark areas occur in the image at the position of the partition structure
Solution Approach 1:
The partition wall is segmented into two functional parts: a light-penetrable portion (first wall) and a light-blocking portion (second wall with reflective layer). This segmentation allows the light-penetrable part to transmit light and avoid dark areas, while the light-blocking part provides effective brightness separation between adjacent backlight areas.
Solution Approach 2:
Different portions of the partition wall have different optical properties. The first wall portion is made light-penetrable to maintain illumination, while the second wall portion is made light-blocking with a reflective layer to prevent brightness interference. This local differentiation resolves the contradiction between needing brightness separation and avoiding dark areas.
2Reliability
If a light reflective layer is added to the partition wall to block light, then the brightness of each area can be adjusted, but the thickness of the partition wall increases causing dark areas
Solution Approach 1:
The partition wall is divided into a light-penetrable first wall and a light-blocking second wall with reflective layer. By segmenting the light-blocking function into a separate thin layer rather than increasing the thickness of the entire partition wall, the design achieves brightness adjustment capability while minimizing overall thickness to avoid dark areas.
Solution Approach 2:
The light reflective layer is implemented as a thin film structure on the second wall portion. This thin film approach provides effective light blocking for brightness control while maintaining minimal thickness, preventing the formation of dark areas that would result from a thick solid partition wall.
3Illumination intensity
If the partition structure is made thinner to reduce dark areas, then the image quality improves, but the ability to block light and adjust brightness decreases
Solution Approach 1:
The partition wall uses a composite structure combining a light-penetrable first wall material and a light-blocking second wall material with reflective layer. This composite design allows the overall structure to remain thin (maintaining good illumination) while the reflective layer provides effective light blocking (maintaining brightness control capability).
Solution Approach 2:
The partition wall is segmented into functional zones: the first wall portion transmits light to maintain illumination quality, while the second wall portion with reflective layer provides light blocking for brightness control. This functional segmentation enables thin overall thickness while preserving brightness adjustment capability.
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 effectively reduces the occurrence of dark areas in the emitted light by controlling the brightness of each area and minimizing the thickness of the reflective layer, enhancing the image quality of liquid crystal display devices.
Implementation Method 1
The light reflective layer is formed on the wall surface of the first light-penetrable wall... the light reflective wall is disposed vertically on the bottom plate. By means of the position of the light reflective layer, the light emitted from the two adjacent lighting areas can be partially or completely blocked or reflected
Data Source
AI summary
A backlight module, a liquid crystal display using the backlight module, and a manufacturing method thereof are provided. The backlight module includes a bottom plate, a plurality of light source sets and at least one partition wall. A plurality of lighting areas is formed on the bottom plate and light source sets are disposed on the lighting areas, respectively. The partition wall is disposed on the bottom plate and between each two adjacent lighting areas to fully or partially block/reflect the light emitted from the lighting areas. The partition wall includes a first light-penetrable wall and a light reflective layer formed on a wall surface of first light-penetrable wall. The light reflective layer is erected on the bottom plate through the support provided by the first light-penetrable wall and its wall surface.