Medical Display Projection Surface for EMC and Cleaning
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Solution Overview
Problem
Medical apparatuses, such as dialysis machines, face challenges with complex sealing and EMC protection due to screen size, interfering contours that hinder cleaning, and parallax errors from the distance between the monitor and the user's position, especially in touch-sensitive systems.
Innovation Solution
A translucent projection surface illuminated by a projector is used, allowing for a freestanding and adjustable display that reduces EMC emissions, facilitates cleaning, and integrates capacitive or resistive sensors for interactive operation, with a two-channel input evaluation system for enhanced user interaction and alarm signaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a monitor with inherent housing is used for display, then display functionality is provided, but complex sealing and EMC protection measures are required
Solution Approach 1:
The patent extracts the display functionality from the traditional monitor housing structure and implements it as a projection system. The projection device projects images onto a projection surface without requiring a sealed housing, thereby eliminating complex sealing and EMC protection measures while maintaining display functionality.
Solution Approach 2:
The patent replaces the mechanical monitor housing structure with an optical projection system. Instead of using a physical enclosed space for display, the system uses light projection onto a surface, substituting the mechanical enclosure with an optical field-based display approach that inherently avoids sealing and EMC issues.
2Ease of operation
If a monitor housing with screen is used, then display is provided, but interfering contours impede cleaning operations
Solution Approach 1:
The patent removes the monitor housing structure entirely and replaces it with a projection system consisting of a projection device and a projection surface. This extraction eliminates the interfering contours and corners that impede cleaning, allowing the underlying surface to be cleaned directly without navigating around housing structures.
Solution Approach 2:
The patent uses a projection surface that can be a flat panel or flexible membrane without a bulky housing. This thin-film approach eliminates protruding contours and creates a smooth surface that is easily cleanable, while still providing the necessary display function through optical projection.
3Measurement precision
If a monitor is positioned at a distance from the user, then display is provided, but parallax errors occur in touch-sensitive systems
Solution Approach 1:
The patent merges the display surface (projection surface) with the touch-sensitive operating field into the same plane. By projecting the display image directly onto the surface where touch input is detected, the system eliminates the spatial separation between display and interaction, thereby eliminating parallax errors and improving touch position accuracy.
Solution Approach 2:
The projection surface acts as an intermediary that simultaneously serves as both the display medium and the touch-sensitive interface. This single surface mediates between the projection device and the user's touch input, ensuring that visual feedback and tactile input occur at the same location, thus eliminating parallax discrepancies.
4Ease of manufacture
If a translucent projection surface is used, then EMC emissions are reduced and cleaning is facilitated, but manufacturing precision requirements increase
Solution Approach 1:
The patent employs a translucent projection surface in the form of a thin film or panel that can be manufactured with standard precision techniques. The simplicity of using a flat translucent surface rather than a complex housing structure outweighs the moderate precision requirements for the projection surface itself, especially since such surfaces are commonly manufactured with adequate precision for display applications.
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 provides a more efficient and user-friendly display system that ensures clear visibility of operating conditions, improved EMC protection, easier cleaning, and reduced manufacturing costs, while maintaining effective interaction and alarm signaling.
Implementation Method 1
a projection apparatus (light-emitting and spaced in parallel from the projection surface) which is arranged on the medical apparatus and is configured to project the predetermined display content from a rear side of the projection surface onto the projection surface
Implementation Method 2
at least one interactive element may be provided which may be equipped with a capacitive or resistive sensor system (touch-sensitive layer or touchscreen)
Implementation Method 3
at least one interactive element may be provided which may be equipped with a capacitive or resistive sensor system (touch-sensitive layer or touchscreen)
Data Source
AI summary
A display device for a medical apparatus including a projection surface arranged on the medical apparatus and configured to present a predetermined display content in a way visible to a user of the medical apparatus, and a projection device arranged on the medical apparatus and configured to project the predetermined display content from a rear side of the projection surface onto the projection surface. The projection surface and the projection device are configured as a head-up display unit for visual field presentation of the display content, and the medical apparatus may be an apparatus for carrying out extracorporeal blood treatment including the display device.