Projector Swelling Portion Integrates Receiver Without Steps
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Solution Overview
Problem
Existing projectors with cover members for input terminals compromise exterior appearance and functionality due to steps and protrusions, leading to dust ingress and poor optical signal reception when trying to integrate light receivers with the projector's design.
Innovation Solution
A projector design featuring a swelling portion on the exterior enclosure that covers part of the front-side lens, allowing the receiver to be oriented to receive optical signals from behind, eliminating the need for special cable cover shapes or light-transmissible members, and enabling reliable remote control operation without degrading the exterior appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover member with a recessed portion is provided to allow light receiver access, then optical signal reception is enabled, but exterior appearance deteriorates due to steps and protrusions
Solution Approach 1:
The light receiver is repositioned from the rear surface to the upper surface of the projector, utilizing a different spatial dimension. The swelling portion on the upper surface accommodates the light receiver, allowing it to receive optical signals from above without creating steps or protrusions that would affect the rear surface appearance.
Solution Approach 2:
The swelling portion acts as an intermediary structure that houses the light receiver. This intermediate element allows the light receiver to be integrated into the upper surface without compromising the overall exterior appearance, as the swelling portion is designed to match the surrounding surface.
2Reliability
If a hole is formed in the cover member for light receiver access, then optical signal reception is enabled, but dust ingress increases compromising the cover's protective function
Solution Approach 1:
The light receiver is extracted from the cover member structure and repositioned to the upper surface. This eliminates the need for holes or openings in the cover member, allowing the cover to maintain its complete protective function while the light receiver accesses optical signals through the swelling portion on the upper surface.
3Reliability
If a light transmissible member is inserted into the hole, then optical signal reception is enabled, but part complexity increases and exterior appearance deteriorates
Solution Approach 1:
The light transmissible member is eliminated by extracting the light receiver from the cover member and repositioning it to the upper surface. The swelling portion provides direct access for the light receiver without requiring any additional light-transmissible components, thereby reducing part complexity.
4Object-affected harmful factors
If the cable cover is attached to the rear surface to protect input terminals, then protection function is improved, but optical signal reception is blocked
Solution Approach 1:
The light receiver is repositioned from the rear surface (where it would be blocked by the cable cover) to the upper surface of the projector. This dimensional change allows the cable cover to be attached to the rear surface for protection while the light receiver simultaneously accesses optical signals from above without 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
The projector ensures reliable optical signal reception and remote control functionality while maintaining a sleek appearance by integrating the receiver with the swelling portion, preventing dust ingress and simplifying manufacturing.
Implementation Method 1
a receiver (6B) disposed in the swelling portion (20) and so oriented that the receiver (6B) receives an optical signal incident from a side opposite to a side where the light is projected through the projection lens (36)
Data Source
AI summary
A projector includes a projection lens having a plurality of lenses and projects modulated light from a light modulator, a receiver that externally receives an optical signal, and an exterior enclosure that forms the exterior of the projector. The projection lens has a front-side lens disposed in a most downstream position in an optical path among the plurality of lenses and having a diameter larger than the diameters of the other lenses. The exterior enclosure has an upper surface portion. The upper surface portion has a swelling portion that swells in such a way that the swelling portion covers part of a circumferential edge portion of the front-side lens. The receiver is disposed in the swelling portion and so oriented that the receiver receives the optical signal incident from a side opposite to a side where the light is projected through the projection lens.