Projector Light Blocking Mechanism for Vent Leakage
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Solution Overview
Problem
Conventional projector devices fail to completely prevent light from leaking through the exhaust vent due to the inefficiency of existing light blocking mechanisms, which allows outgoing beams from the lamp unit to escape outside the casing.
Innovation Solution
A light blocking mechanism comprising first and second light blocking members with inclined plates arranged in a specific phase difference to cover the vent openings, ensuring that light emitted from the lamp unit is blocked in all orientations, preventing leakage through the exhaust vent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If light blocking plates are arranged to cover the vent opening, then light leakage is reduced, but outgoing beams in certain orientations still escape through the gaps between plates
Solution Approach 1:
The light blocking mechanism is divided into multiple light blocking plates arranged in parallel, each plate creating individual gaps for air flow. This segmentation allows the system to block light while maintaining ventilation functionality.
Solution Approach 2:
The light blocking plates are arranged at an inclination angle relative to the vent opening plane, transitioning from a two-dimensional flat blocking surface to a three-dimensional angled arrangement. This angular positioning prevents light from passing through gaps by blocking it from multiple orientations.
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 described light blocking mechanism effectively prevents light from leaking outside the casing, ensuring that outgoing beams from the lamp unit are fully blocked, thereby extending the lamp's life by maintaining optimal temperature and reducing noise from the exhaust fan.
Implementation Method 1
the light blocking mechanism 9 blocks the light emitted from the lamp unit 4 toward the vent in all orientations
Implementation Method 2
The lamp unit is air-cooled by cooling air, because the lamp unit generates heat when it emits light
Data Source
AI summary
A projector device-of the present invention includes a light blocking mechanism for blocking leak light from a lamp unit. The light blocking mechanism includes a first light blocking member having a plurality of first light blocking plates arranged therein at certain pitches, and a second light blocking member having a plurality of second light blocking plates arranged therein at certain pitches. The first light blocking plates and the second light blocking plates each define a gap providing an air flow passage. A flat inclined part of each second light blocking plate extends in an inverted direction to a flat inclined part of each first light blocking plate, with a predetermined angle of inclination, so that the first light blocking plates and the second light blocking plates block the light emitted from the lamp unit toward a vent of a casing in all orientations.