Projector Vertical Stacking and Asymmetric Light Divergence
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Projectors with speakers positioned at the lower side suffer from sound reflection and vibration issues, affecting sound and image quality due to the installation surface.
Innovation Solution
A projector design with a two-tiered structure where the projection optical unit and speaker section are stacked vertically, with the speaker section positioned above the projection optical unit, and the light emitted from the projection lens having different divergence angles to minimize sound reflection and improve image quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the speaker is disposed at the lower side of the projector, then the structure is simplified and easy to manufacture, but the sound emitted from the speaker is reflected by the installation surface causing indistinct sound quality and image quality deterioration
Solution Approach 1:
The patent applies dimensional change by transitioning from a horizontal arrangement to a vertical stacked arrangement of the speaker and projection optical unit. The speaker is positioned above the projection optical unit in the vertical direction, which changes the spatial dimension of sound emission and prevents sound reflection from the installation surface, thereby resolving the contradiction between manufacturing simplicity and sound quality.
Solution Approach 2:
The patent employs asymmetry in the light flux divergence angles. The light flux has a smaller divergence angle at the speaker side than at the opposite side, creating an asymmetric optical path that avoids the speaker section while maintaining projection quality. This asymmetric design allows the speaker to be positioned above without interfering with the projected image.
2Ease of manufacture
If the speaker is disposed at the lower side of the projector, then the assembly process is simplified, but the vibration of the speaker affects the image quality of the projector
Solution Approach 1:
By arranging the speaker vertically above the projection optical unit rather than horizontally adjacent to it, the patent separates the vibration source from the optical path in the vertical dimension. This spatial separation prevents speaker vibrations from directly affecting the projection lens and image quality, while maintaining assembly simplicity through the stacked configuration.
3Area of stationary object
If the light flux has a small divergence angle at the speaker side, then the blind area in the projected image is minimized, but the light distribution pattern becomes more complex
Solution Approach 1:
The patent applies local quality by creating different divergence angles for different regions of the light flux. The light flux has a smaller divergence angle at the speaker side and a larger divergence angle at the opposite side, optimizing the projection pattern locally in each region. This local optimization reduces blind areas near the speaker while maintaining adequate light distribution elsewhere, without requiring complex overall system redesign.
Data Source
AI summary
A projector according to the present disclosure includes a projection optical unit section including a projection lens, a speaker section, and a chassis having a first holding part configured to hold the projection optical unit section, and a second holding part which is stacked along a first direction with respect to the first holding part, and is configured to hold the speaker section, wherein light emitted from the projection lens spreads toward a second direction perpendicular to the first direction in a plane including the first direction and an optical axis of the projection lens, and in the light emitted from the projection lens, a divergence angle at an opposite side to the first direction with respect to the second direction is smaller than a divergence angle at the first direction side with respect to the second direction.