Light Guide Plate Supporting Rib for Thin LCD Backlight
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Solution Overview
Problem
Existing edge-type backlight modules are unable to achieve a thin liquid crystal display device design while maintaining cost-effectiveness due to the necessity of a rubber frame, which increases production costs and thickness.
Innovation Solution
The proposed solution replaces the rubber frame with a supporting part integrated into the light guide plate, which includes a positioning part with planar or inclined surfaces to support and position the optical sheet, thereby reducing material usage and production costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a rubber frame is used to support the display panel and position the optical sheet, then the structural stability is improved, but the device thickness and production cost increase
Solution Approach 1:
The patent merges the supporting function and optical sheet positioning function into the light guide plate itself by adding a supporting rib structure. The supporting rib extends from the back surface of the light guide plate to provide mechanical support for the display panel, while its protruding end positions the optical sheet. This integration eliminates the need for a separate rubber frame, thereby reducing device thickness while maintaining structural stability.
Solution Approach 2:
The light guide plate is designed to perform multiple functions: light guiding, mechanical support for the display panel, and positioning of the optical sheet. The supporting rib structure enables the light guide plate to simultaneously provide structural support and precise positioning, replacing what previously required separate components like the rubber frame.
2Stability of the object's composition
If a rubber frame is used to support the display panel and position the optical sheet, then the structural stability is improved, but the production cost increases
Solution Approach 1:
The patent merges the supporting function and optical sheet positioning function into the light guide plate itself by adding a supporting rib structure. The supporting rib extends from the back surface of the light guide plate to provide mechanical support for the display panel, while its protruding end positions the optical sheet. This integration eliminates the need for a separate rubber frame, thereby reducing device thickness while maintaining structural stability.
Solution Approach 2:
The light guide plate is designed to perform multiple functions: light guiding, mechanical support for the display panel, and positioning of the optical sheet. The supporting rib structure enables the light guide plate to simultaneously provide structural support and precise positioning, replacing what previously required separate components like the rubber frame.
3Length of stationary object
If the supporting part is integrated into the light guide plate, then the production cost and thickness are reduced, but the positioning precision of the optical sheet must be maintained
Solution Approach 1:
The supporting rib is designed with specific local geometric features including a protruding end that contacts the optical sheet. The rib has a width and height that are optimized to provide precise positioning while maintaining structural integrity. This local structural optimization ensures that the integrated supporting part can accurately position the optical sheet without requiring additional positioning components.
Data Source
AI summary
The present disclosure provides a backlight module and a display device. The backlight module includes a back plate, a light guide plate (LGP) arranged on the back plate and including a central region and a peripheral region, and an optical sheet arranged on a light-exiting surface of the LGP. The LGP includes a supporting part arranged on the peripheral region and configured to support a display panel.