Projection Lamp Light Shielding Member Stray Light Control
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Solution Overview
Problem
Existing commercial projection lamps suffer from interference by stray light, resulting in poor projection effects and affecting user experience.
Innovation Solution
A projection lamp design featuring a light shielding member with a first opening, positioned between the peripheral region of a transparent mask and the optical lens, prevents stray light from interfering by allowing light to pass only through the opening after being emitted through the optical lens, while enhancing the stereoscopic effect with material differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a transparent mask and optical lens are used for projection, then the projection effect is improved, but stray light interferes with the projection effect
Solution Approach 1:
A light shielding member is introduced as an intermediary component between the optical lens and the transparent mask. This member blocks stray light paths while allowing the central beam to pass through its opening, effectively eliminating stray light interference without compromising the projection effect
Solution Approach 2:
The light shielding member is designed with a segmented structure featuring a central opening surrounded by blocking material. This segmentation allows the central region to transmit light for projection while the peripheral region blocks stray light, resolving the contradiction between projection quality and stray light elimination
2Object-affected harmful factors
If a light shielding member is added to block stray light, then stray light interference is reduced, but the device complexity increases
Solution Approach 1:
The light shielding member serves multiple functions simultaneously: it blocks stray light, supports the transparent mask, and provides structural alignment between optical components. By combining these functions into a single component, the solution reduces overall device complexity while effectively addressing stray light interference
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
Effectively prevents stray light interference, improving the projection effect and enhancing the stereoscopic experience with a dynamic, color-differentiated presentation.
Implementation Method 1
the light shielding member having a first opening in a middle portion thereof so that the central region of the optical lens is aligned with the central region of the transparent mask, wherein the light from the light source only passes through the first opening of the light shielding member to emit out from the transparent mask after passing through the optical lens
Data Source
AI summary
A projection lamp is provided, which includes a first shell assembly, a projection assembly and a light shielding member. The first shell assembly includes a transparent mask. The projection assembly includes an optical lens, an optical element, a light source and a driving source for driving the optical element to move. The optical element is positioned to direct light from the light source to the optical lens when the light source is powered. At least part of the light shielding member is disposed between the peripheral region of the transparent mask and the peripheral region of the optical lens. The light shielding member has a first opening, and the light from the light source only passes through the first opening of the light shielding member to emit out from the transparent mask after passing through the optical lens.