Light-emitting module
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Solution Overview
Problem
Light-emitting modules can be damaged by external light such as sunlight concentrating on the light-emitting surface due to backward travel through the optical system.
Innovation Solution
A light-emitting module design incorporating a protective member with a light-transmitting member and a light-shielding film that covers a first resin, which includes a light-shielding film at the surface of the light-transmitting member to shield external light and a first resin that can be light-shielding or light-absorbing, along with a ventilation portion to equalize internal and external pressures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light-emitting module uses an optical system to project light forward, then light distribution control is improved, but external light can travel backward and concentrate at the light-emitting surface causing damage
Solution Approach 1:
A light-shielding film is introduced as an intermediary component between the light-emitting elements and the external environment. This film selectively blocks harmful backward-traveling external light from reaching the light-emitting surface while allowing forward-traveling emitted light to pass through, thus protecting the module without compromising illumination function
Solution Approach 2:
The light-shielding film is applied specifically at the light-emitting surface area where external light concentration occurs, rather than shielding the entire module. This localized approach provides targeted protection against harmful light concentration while maintaining optical performance in the light emission direction
2Object-affected harmful factors
If a light-shielding film is added to block external light, then protection from external light damage is improved, but the device complexity increases
Solution Approach 1:
The invention uses a thin light-shielding film rather than a bulky shielding structure. This thin-film approach provides effective light blocking functionality while minimizing added complexity and maintaining a sleek module design
Solution Approach 2:
The light-shielding film serves multiple functions simultaneously: it blocks harmful external light, acts as a protective layer for the light-emitting elements, and can be integrated with the existing encapsulation structure. This multi-functionality reduces the need for separate protective components
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 design effectively protects the module from external light damage, suppresses stray light, and maintains high light extraction efficiency while ensuring reliable operation and accurate projection.
Implementation Method 1
a light-shielding film located at a surface of the light-transmitting member, the light-shielding film covering the first resin when viewed in plan view
Implementation Method 2
a light-transmitting member covering the first resin when viewed in plan view
Data Source
AI summary
A light-emitting module including a first wiring substrate, a second wiring substrate located on the first wiring substrate, a plurality of light-emitting elements located on the second wiring substrate, a wire connecting a first terminal of the first wiring substrate and a second terminal of the second wiring substrate, a first resin located on the first wiring substrate and on the second wiring substrate, and a protective member located on the first resin. The first resin covers the wire and surrounds the plurality of light-emitting elements when viewed in plan view. The protective member includes a light-transmitting member covering the first resin when viewed in plan view, and a light-shielding film located at a surface of the light-transmitting member. The light-shielding film covers the first resin when viewed in plan view.