Backlight Frame Interlocking for Curved Display Stability
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Solution Overview
Problem
Conventional backlights for curved and narrow-frame displays face challenges in maintaining display quality due to deformation of the molded frame, leading to gaps that allow water, dust, and other contaminants to enter, causing abnormalities, and existing solutions like tape fastening are costly and ineffective over time.
Innovation Solution
The design incorporates interlocking portions on the molded and rear frames, including projections and pockets that regulate movement in the inward-and-outward direction, preventing deformation and eliminating the need for tape fastening, thus maintaining display quality and preventing contamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the frame width of the molded frame is reduced to prioritize design, then the display region frame width is narrowed, but the molded frame becomes difficult to interlock with the rear frame and deforms under vibration or impact
Solution Approach 1:
The frame structure is segmented into multiple functional components: the molded frame (first frame) and rear frame (second frame) are divided into multiple interlocking portions distributed along the frame. This segmentation allows each portion to independently contribute to the overall interlocking strength, enabling reliable connection even when the total frame width is reduced.
Solution Approach 2:
The interlocking mechanism transitions from relying solely on frame width to utilizing a multi-dimensional interlocking system. Projections extend in the inward-and-outward direction perpendicular to the light-outgoing surface, creating interlocking portions that engage with corresponding pockets. This dimensional change allows effective interlocking without requiring increased frame width.
2Ease of manufacture
If tape is used to fasten the molded frame to the rear frame, then the frames are fastened together, but tape adhesion deteriorates with age and the connection becomes unreliable
Solution Approach 1:
The adhesive/tape-based mechanical fastening system is replaced with a projection-pocket interlocking mechanism. This mechanical interlocking system provides durable, permanent connection that does not deteriorate with age like adhesive bonds. The projections fit into pockets to create a rigid, stable connection between the molded frame and rear frame.
3Adaptability or versatility
If the molded frame is allowed to deform, then the frame can accommodate curved display surfaces, but gaps are generated that allow water and dust to enter
Solution Approach 1:
The interlocking portions with projections and pockets are designed to preemptively prevent frame deformation that would create gaps. By providing rigid mechanical interlocking in advance, the structure resists vibration and impact forces before they can cause deformation and contaminant intrusion.
Solution Approach 2:
The design accommodates curved display surfaces through the flexible optical member configuration while the rigid interlocking frame structure maintains its shape. The curvature adaptation is achieved in the optical path rather than the frame structure, preventing gap formation while maintaining versatility for curved displays.
Data Source
AI summary
Provided is a backlight capable of keeping display quality, and a display including the backlight. The backlight includes a molded frame and a rear frame that hold an optical member forming an area light source from the front and back sides of a light-outgoing surface of the area light source. The molded frame has a portion forming the frame of the area light source, and has molded-frame projections selectively disposed in this portion and facing the rear frame in the back-and-forth direction. The rear frame has a portion forming the frame of the area light source, and has rear-frame pockets selectively disposed in this portion and facing the molded frame in the back-and-forth direction. Each molded-frame projection and each rear-frame pocket are interlocked, and regulate a movement in the inward-and-outward direction.