Backlight Module Frame Gaps for LCD Edge Brightness Uniformity
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Solution Overview
Problem
Large-size liquid crystal display panels spliced from small-size glass substrates suffer from 'dark regions' and brightness decay due to the edge portion of the optical sheet lapping the support frame, affecting display uniformity and visual aesthetics.
Innovation Solution
A backlight module design with a middle frame featuring supporting portions arranged at intervals to create gaps between the optical sheet and the frame, allowing light to enter these gaps and improve edge brightness, thereby reducing 'dark regions' and brightness decay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the optical sheet laps the support frame to ensure structural stability, then the structural stability is improved, but the light transmission is blocked causing dark regions
Solution Approach 1:
The support frame is segmented with multiple gaps instead of being continuous, allowing light to pass through while maintaining structural support. The gaps divide the frame into sections that still provide stability but enable light transmission to reach the edge regions of the optical sheet.
Solution Approach 2:
Different regions of the support frame have different properties - the portions between gaps maintain structural stability while the gap regions allow light transmission. This local differentiation resolves the contradiction by having each region optimized for its specific function.
2Volume of moving object
If the optical sheet is positioned close to the support frame for compact design, then the device compactness is improved, but light transmission is hindered causing brightness decay
Solution Approach 1:
The support frame is segmented with gaps that allow light to reach the optical sheet edges without requiring increased distance. The gaps create light transmission paths within the compact structure, eliminating brightness decay while maintaining device compactness.
3Strength
If the support frame continuously laps the optical sheet for structural support, then the structural support is improved, but light transmission is blocked causing non-uniform display
Solution Approach 1:
The continuous support frame is segmented into discrete sections separated by gaps. These segmented portions provide structural support while allowing light to pass through, eliminating the dark regions and non-uniform display caused by continuous lapping.
Solution Approach 2:
The harmful portions of the support frame that block light are extracted by creating gaps. The remaining frame portions continue to provide structural support, while the removed sections enable light transmission for uniform display.
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 design enhances display uniformity by increasing edge brightness and reducing 'dark frames', improving the overall display quality and visual effect of spliced liquid crystal modules.
Implementation Method 1
a gap is provided between the optical sheet and a surface of a part of the middle frame facing the optical sheet and located between adjacent supporting portions of the plurality of supporting portions
Data Source
AI summary
A backlight module and a display device are provided. In the backlight module, the middle frame includes a connecting portion covering the side wall and located at an end of the side wall away from the bottom wall, a surface of the connecting portion facing the optical sheet is provided with a plurality of supporting portions configured to support the optical sheet, and the plurality of supporting portions are arranged at intervals, a gap is provided between the optical sheet and a surface of a part of the middle frame facing the optical sheet and located between adjacent supporting portions.