Transparent LED Substrate Layout for Multi-Directional Illumination
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Solution Overview
Problem
Conventional LED illumination devices emit directional light, limiting their applications and having low luminous efficiency due to their inability to provide multi-directional lighting and uniform illumination.
Innovation Solution
A light emitting element with a transparent substrate and LED chips that allow light to pass through, emitting light from both surfaces with a beam angle greater than 180 degrees, enhancing luminous efficiency and light shape, and optionally incorporating a wavelength conversion layer for color adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional LED is used as a directional light source, then the device structure is simple, but the illumination application is limited and luminous efficiency is low
Solution Approach 1:
The patent transitions LED illumination from a single-direction (one-dimensional) emission to multi-directional emission by placing LED chips on both the front surface and the back surface of the transparent substrate, and by utilizing the beam spread beyond 180 degrees. This dimensional expansion of light emission directions enables the device to provide both direct and indirect illumination, significantly increasing adaptability for various illumination applications including indoor lighting, outdoor lighting, and decorative lighting.
2Use of energy by moving object
If conventional LED emits light from a single side, then the device structure is simple, but the luminous efficiency is relatively low
Solution Approach 1:
The patent segments the LED illumination system into multiple independent light emitting units: LED chips on the front surface, LED chips on the back surface, and transparent substrate serving as a light guide. This segmentation allows each component to contribute to light emission independently, with front surface LEDs providing direct illumination and back surface LEDs providing indirect illumination through the transparent substrate, thereby increasing overall luminous efficiency without creating a overly complex integrated structure.
3Use of energy by moving object
If LED chips are arranged on substrate to provide multi-directional light, then the luminous efficiency is enhanced, but the device complexity increases
Solution Approach 1:
The transparent substrate serves multiple functions simultaneously: it acts as a mounting substrate for LED chips on both surfaces, serves as a light guide to transmit and distribute light from back surface LEDs to the front surface, and functions as a protective cover. This multi-functionality reduces the need for separate components, thereby enhancing luminous efficiency through multi-directional emission while keeping the overall device structure relatively simple and integrated.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution enables LED illumination devices to emit light in multiple directions, improving luminous efficiency and light distribution while allowing for cost reduction and enhanced lighting effects.
Implementation Method 1
Light emitted from at least one of the LED chips passes through the transparent substrate and emerges from the second main surface
Implementation Method 2
a wavelength converting layer for converting wavelength of light
Data Source
Figure 1~2
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Figure 6~7
AI summary
A light emitting element (1; 310) includes a transparent substrate (2) and a plurality of light emitting diode (LED) chips (3; 14). The transparent substrate (2) has a support surface (210) and a second main surface (21B) disposed opposite to each other. At least some of the LED chips (3; 14) are disposed on the support surface (210) and light emitting surfaces (34) of the LED chips (3; 14) and at least a part of the support surface (210) without the LED chips (3; 14) form a first main surface (21A) where light is emitted from. Each of the LED chips (3; 14) includes a first electrode (16; 31A) and a second electrode (18; 31B). Light emitted from at least one of the LED chips (3; 14) passes through the transparent substrate (2) and emerges from the second main surface (21B). An illumination device (10; 10'; 11; 50; 301; 302; 303; 304) includes at least one light emitting element (1; 310) and a supporting base (5; 26; 324). The light emitting element (1; 310) is disposed on the supporting base (5; 26; 324), and an angle is formed between the light emitting element (1; 310) and the supporting base (5; 26; 324).