Transparent Elevator Shaft Door Projection System
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Solution Overview
Problem
Existing elevator installations in modern buildings face design complications and poor image quality due to the need for projectors in elevator lobbies, which are affected by daylight and require complex installations that can obstruct the architectural design and cause image darkening.
Innovation Solution
Projecting images onto glass or partly transparent shaft doors from within the elevator shaft, using a projector and optical deflecting devices positioned in the shaft to avoid the need for lobby-mounted equipment, ensuring high-quality image representation without disturbing the lobby design and preventing image darkening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a projector is arranged in the elevator lobby to project images onto shaft doors, then information can be displayed to passengers, but the architectural design of the lobby is compromised and image quality deteriorates under daylight conditions
Solution Approach 1:
The projector is relocated from the traditional lobby space to the elevator shaft itself, inverting the conventional arrangement. This allows the projection system to operate in a previously unused space, eliminating the need for complex lobby installations while maintaining information display functionality.
Solution Approach 2:
The projection system utilizes the vertical dimension of the elevator shaft by positioning the projector on the ceiling of the shaft to project downward onto the shaft door. This dimensional approach allows for simple optical paths without requiring complex lateral deflecting devices in the lobby.
2Area of stationary object
If a projector is positioned at a substantial distance from the shaft door to cover large areas, then broad information coverage is achieved, but persons entering the beam path darken the image
Solution Approach 1:
The projector is extracted from the lobby environment and positioned within the elevator shaft, removing it from the space where passengers move. This eliminates the problem of persons inadvertently entering the beam path and darkening the image, while the projection still covers the necessary area of the shaft door.
3Illumination intensity
If high-quality projectors are used in daylight conditions in the lobby, then image quality can be maintained, but the cost and complexity of the installation increases
Solution Approach 1:
The dark environment of the elevator shaft, which would normally be considered a limitation, is converted into an advantage. The low-light conditions in the shaft eliminate the need for high-power, expensive projectors required for daylight operation in the lobby, thereby reducing installation costs and complexity while maintaining high image quality.
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
This solution allows for high-quality information representation on shaft doors without compromising the architectural design of modern buildings, as images are projected from the shaft onto the doors, avoiding light disturbance and enabling flexible projector placement within the shaft.
Implementation Method 1
Due to the property of the shaft door to reflect an incident light beam only partly, an image is imaged on the other side, which faces the elevator lobby, of the shaft door
Implementation Method 2
arrange at least one optical deflecting device, which projects the light beams emanating from the projector onto the shaft door, in the elevator shaft
Data Source
AI summary
An elevator installation includes an elevator car moved in an elevator shaft between floors in a building. A shaft door for closing the elevator shaft is arranged at each floor. A method for representing information on the shaft doors makes possible a qualitatively high-grade projection of an image on the shaft door. The shaft doors are formed to be at least partly transparent, wherein a projector is arranged in the elevator shaft and projects an image onto the side of the shaft door facing the elevator shaft.