Backlight Unit Anti-Contact Protrusion for Optical Sheet Protection
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Solution Overview
Problem
Liquid Crystal Displays (LCDs) are prone to damage from contact between the reflective sheet and the top cover due to direct contact, which can lead to mechanical stress and potential damage.
Innovation Solution
A backlight unit design that includes an anti-contact protrusion on the bottom chassis, which contacts the mold frame, allowing it to be spaced apart from the light guide plate and optical sheet, thereby preventing direct contact and potential damage. This design includes a light emitting device, a light guide plate, an optical sheet, a bottom chassis with anti-contact protrusions, and a mold frame that is coupled using anti-contact protrusions, ensuring a predetermined distance between the mold frame and the optical sheet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the mold frame is disposed close to the light guide plate and optical sheet, then the device structure is compact, but the reflective sheet and optical components may be damaged due to direct contact
Solution Approach 1:
The patent introduces an anti-contact protrusion as an intermediary element between the mold frame and the optical sheet. This protrusion extends from the bottom chassis to contact the mold frame, preventing the mold frame from directly touching the optical sheet and light guide plate, thereby protecting these components from damage while maintaining a compact structure.
2Ease of manufacture
If the mold frame contacts the light guide plate directly, then assembly is simple, but mechanical stress damages the optical sheet
Solution Approach 1:
The anti-contact protrusion is designed to preliminarily prevent harmful contact between the mold frame and optical components. By extending this protrusion from the bottom chassis, the design proactively blocks the mold frame from applying mechanical stress to the optical sheet before damage can occur, thus eliminating the harmful effect while maintaining assembly simplicity.
Data Source
AI summary
A backlight unit is disclosed. The backlight unit includes a light emitting device, a light guide plate to guide light irradiated from the light emitting device, an optical sheet disposed on a front surface of the light guide plate, a bottom chassis disposed below the light guide plate, a mold frame disposed on a front surface of the optical sheet, and an anti-contact protrusion disposed at the bottom chassis so as to come into contact with the mold frame, thereby allowing the mold frame to be spaced apart from the light guide plate and the front surface of the optical sheet.