Back Light Unit Bezel Width Reduction via Guide Panel Extraction
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Solution Overview
Problem
The existing LCD designs face limitations in reducing the width of the bezel area due to the structural arrangement of the guide panel and light source module, making it difficult to minimize the overall size of the display.
Innovation Solution
The guide panel is formed in a 'rectangular horseshoe' shape with an opened lateral side, and the flexible printed circuit board is designed with a reduced width and modified electrode configuration to minimize the bezel area, allowing the light source module to be positioned at the lateral side of the guide panel, thereby reducing the bezel width.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the guide panel is arranged in a rectangular frame type with the light source module at the bezel area, then the structural stability is maintained, but the width of the bezel area cannot be reduced
Solution Approach 1:
The guide panel is extracted from its traditional rectangular frame configuration and repositioned to be disposed at the lateral side of the light guide panel, removing it from the bezel area entirely. This extraction allows the light source module to be arranged at the lateral side of the guide panel, thereby reducing the bezel width while maintaining structural functionality.
Solution Approach 2:
The arrangement transitions from a planar bezel-area configuration to a lateral-side configuration, utilizing the vertical or side dimension of the display structure. By positioning the guide panel and light source module at the lateral side rather than within the horizontal bezel area, the design exploits dimensional reorganization to reduce bezel width.
2Length of moving object
If the flexible printed circuit board width is reduced to minimize bezel area, then the bezel width is reduced, but the electrode configuration becomes more complex
Solution Approach 1:
The flexible printed circuit board is segmented into a main body and a lateral side extension portion. This segmentation allows the circuit board to be narrowed in its main body while extending laterally to accommodate electrode connections, thereby reducing the overall bezel width while maintaining proper electrode configuration through spatial distribution.
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
An LCD is disclosed. Particularly, a flexible printed circuit board (181) of which electrodes (185a, 186a; 185c, 186c) arranged at one side and the other side are connected to each other through a contact hole (185b, 186b), a back light unit that uses a guide panel (140) of which a lateral side end is opened, and an LCD using the flexible printed circuit board (181) and the back light unit are disclosed.