Curved Frame Planar Illumination Apparatus Fixation
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Solution Overview
Problem
Conventional planar illumination apparatuses require supporting and concave portions on a curved frame to fix optical sheets, making it difficult to reduce the frame size.
Innovation Solution
The planar illumination apparatus features a curved frame with optical sheets overlapping in a plan view, where end portions of the sheets are fixed to the upper end surface of the frame via fixing members, allowing for a reduced frame size without the need for supporting and concave portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If supporting portions and concave portions are provided on the curved frame to fix optical sheets, then the optical sheets can be securely fixed, but the frame size increases
Solution Approach 1:
The patent transitions from a two-dimensional planar frame structure to a three-dimensional curved frame structure. The frame is bent in the vertical direction to match the curvature of the optical sheets, allowing the fixing surfaces to be positioned in different vertical levels. This dimensional change enables secure fixation without requiring additional horizontal space, thus reducing frame size while maintaining fixation reliability.
Solution Approach 2:
The patent integrates the fixing function directly into the frame structure itself. The curved frame incorporates fixing surfaces that simultaneously serve as both the structural support and the fixation mechanism. This nesting of functions eliminates the need for separate supporting portions and concave portions, reducing overall frame size while maintaining secure optical sheet fixation.
2Reliability
If supporting portions and concave portions are provided on the curved frame, then optical sheets can be fixed, but the device complexity increases
Solution Approach 1:
The patent merges the supporting function and the fixing function into a single integrated curved frame structure. The frame simultaneously provides structural support and optical sheet fixation through its curved geometry and integrated fixing surfaces. This consolidation eliminates the need for separate supporting portions and concave portions, reducing device complexity while maintaining fixation security.
Solution Approach 2:
The curved frame is designed to perform multiple functions: it provides structural support, defines the curved geometry for the optical sheets, and incorporates fixing surfaces for securing the optical sheets. This multi-functionality reduces the number of separate components needed, simplifying the overall device structure while ensuring reliable fixation.
Data Source
AI summary
A planar illumination apparatus according to an embodiment includes: a frame including a bottom surface that is curved as viewed in a cross section, and a side wall that is provided in a standing manner so as to surround a circumference of the bottom surface; a light guide plate that is housed in the frame, that is curved along the bottom surface as viewed in the cross section, and that includes an emission surface for emitting light; and a plurality of optical sheets that are arranged along the emission surface of the light guide plate and that overlap with one another in a plan view. An end portion of at least one of the plurality of optical sheets is fixed to an upper end surface of the side wall of the frame via a fixing member.