Circular Light Emission via Shade Layer Aperture
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Solution Overview
Problem
Conventional LEDs emit light as point sources, limiting their ability to produce circular or focused light beams, which hampers their application in spotlighting and light focusing applications where concentrated illumination is required.
Innovation Solution
A light-emitting device comprising a substrate, a light-emitting chip, a frame, and a transparent sheet with a shade layer is used to confine the light emission, creating a circular shape by positioning the shade layer with an opening over the chip to direct the light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If conventional LEDs are used as point light sources, then the light emission has directivity and simplicity, but the illumination range cannot be concentrated and circular shape cannot be achieved
Solution Approach 1:
A transparent sheet with a shade layer is introduced as an intermediary component between the LED chip and the external environment. The shade layer, positioned on the transparent sheet, acts as a mediating structure that shapes the light emission into a circular pattern while maintaining the simplicity of the LED chip itself. This intermediary element resolves the contradiction by providing the desired circular shape without requiring modification of the LED chip structure.
Solution Approach 2:
The light emission shaping function is segmented from the LED chip structure and assigned to a separate shade layer component. This segmentation allows the LED chip to maintain its simple point light source characteristics while the shade layer independently provides the circular shaping function. The frame structure further segments the device into functional zones: the LED chip area, the transparent sheet area with shade layer, and the peripheral frame area.
2Manufacturing precision
If no frame is used in LED fabrication, then the manufacturing process is simple, but the light emission shape cannot be confined for emitting a light beam
Solution Approach 1:
The frame and shade layer are pre-positioned and fixed to the substrate before the LED chip is mounted. This preliminary action ensures that the light emission confinement structure is already in place, providing precise geometric constraints for the light beam. The frame is attached to the substrate with adhesive, and the transparent sheet with shade layer is positioned accordingly, creating a pre-configured optical path that guides the light emission into the desired circular shape.
3Illumination intensity
If LEDs are used for spotlight applications, then energy saving and long lifetime advantages are maintained, but the illumination cannot be concentrated due to point light source property
Solution Approach 1:
The transparent sheet with shade layer serves as an optical intermediary that concentrates the divergent light from the LED point source into a focused circular beam. This intermediary structure achieves light concentration similar to traditional spotlight systems but with simpler geometry. The shade layer's circular opening acts as an aperture that defines and concentrates the light path, enabling spotlight-like illumination while preserving the LED's energy efficiency and longevity advantages.
Data Source
AI summary
The present invention provides a light-emitting device having circular light emission. By disposing a light-emitting chip on a substrate and a frame on one side of the light-emitting chip, a transparent sheet is disposed on the frame. In addition, a shade layer is disposed on one surface of the transparent sheet and an opening is disposed at the center of the shade layer for providing circular light emission. Alternatively, the opening can be formed on the frame and aligning with the light-emitting and thus providing circular light emission.