Passive module for the visual display of dust deposition levels in indoor spaces

A power-free display module with replaceable or integrated display units addresses the need for a visual dust deposition indicator in indoor spaces, offering reliable dust accumulation detection without power supply, suitable for various indoor and vehicle environments.

DE202025003692U1Active Publication Date: 2026-02-19BENKHARDT AXEL +2
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Patent Information

Application Number
DE202025003692
Authority / Receiving Office
DE · DE
Patent Type
Utility models
Current Assignee / Owner
Filing Date
2025-11-28
Publication Date
2026-02-19
Estimated Expiration
2035-11-30

AI Technical Summary

Technical Problem

There is a lack of a power-free, visual, modular, and consumer-friendly display device for detecting dust deposition status in indoor spaces, as existing devices either require power or are not designed for indoor use and lack a display device.

Method used

A power-free display module comprising a housing, viewing area, and display unit that changes visually with dust deposition, allowing for replaceable or integrated display units, using methods like dust absorption, adhesion, or optical alteration, without requiring a power supply.

Benefits of technology

Enables timely detection of cleaning needs with a simple, electricity-free module that provides reliable visual indication of dust accumulation, suitable for various indoor environments and vehicles.

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Abstract

Module for passive, power-free visual indication of dust deposition status in indoor spaces, comprising: - a case, - at least one display unit, - at least one area of ​​consideration, the display unit exhibits a visually perceptible change when dust particles are deposited, indicating the dust condition of an interior space.
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Description

[0001] The invention relates to a power-free display module intended for indoor use, which indicates the state of dust deposition by means of an optically perceptible change. The invention allows the detection of a cleaning need and comprises an interchangeable or permanently integrated display unit that does not itself require a power supply.

[0002] Dust collection pads, sticky pads, and passive dust samplers are known from industrial environmental monitoring. These devices are used for the technical or scientific analysis of dust deposits but are not intended for visual consumer display or indoor use. They typically lack a display device, a household housing, a multi-stage optical status indicator, modular interchangeability of display elements, and consumer mounting.

[0003] Electronic dust sensors also exist that use optical or electrical methods to measure dust concentrations in the air. However, these require a power supply, calibration, and electronics and are not suitable as a power-free household module. Furthermore, they measure airborne dust, not dust deposits on a defined surface.

[0004] In the area of ​​household products, cleaning products and anti-dust products are known, but there is no passive module that creates a visual display through dust deposition and is designed for indoor use as a cleaning indicator.

[0005] Thus, the current state of the art lacks a power-free, visual, modular and consumer-friendly display device for the dust deposition status in indoor spaces.

[0006] The purpose of the invention is to provide a simple, electricity-free and cost-effective module that visually indicates dust accumulation indoors, thereby enabling timely detection of cleaning needs. The display should be reliably created by dust deposition and should have at least two different display states.

[0007] Furthermore, the module should have a replaceable display unit, so that once a deposit has accumulated, a new insert can be used without having to dispose of the module. Alternatively, a permanently integrated, cleanable display unit should also be possible to cover all variants.

[0008] The task is solved by a power-free display module consisting of: • a housing, • at least one viewing area, • a display unit, • where the display unit shows a visually perceptible change when dust particles are deposited, reflecting the dust condition of an interior space.

[0009] The display unit can be replaceable or permanently integrated. The display is generated by dust accumulation, surface changes, light reflection, light scattering, structural changes, or any other optical alteration. The module requires no power supply.

[0010] The following preferred (non-limiting) embodiments are: 1. The display unit is designed as a pad, film, cartridge or insert. 2. The display unit can function by dust absorption through adhesive effects, microstructures, electrostatic properties or mechanical adhesion. 3. The module can be attached to walls, furniture, or freestanding. 4. The display unit can have several visually distinguishable states. 5. The module can be used in any indoor space, especially living rooms, bedrooms, children's rooms, offices, hotels, holiday apartments or similar spaces. 6. The display unit can be replaced at defined intervals or after complete deposition. Variant 7: Display unit permanently integrated and reactivated by cleaning. 8. Replacement or refill sets of display units can be provided separately.

[0011] The module can also be used in vehicles, particularly in vehicle interiors, where dust deposits are especially common due to limited air circulation and changing environmental conditions. The module can be mounted, for example, on the dashboard, in the glove compartment, in door pockets, or on other interior surfaces. Its power-free operation allows for trouble-free use even when the vehicle is switched off. The term "vehicle interior" as used in the invention also includes motorhomes, caravans, and other mobile interiors with their own dust accumulation surfaces.

Claims

[1] Module for passive, power-free visual indication of a dust deposition state in indoor spaces, comprising: - a case, - at least one display unit, - at least one area of ​​consideration, the display unit exhibits a visually perceptible change when dust particles are deposited, indicating the dust condition of an interior space. [2] Module according to claim 1, characterized by that the display unit is replaceable. [3] Module according to claim 1, characterized by that the display unit is permanently integrated and reusable through cleaning. [4] Module according to one of the preceding claims, wherein the optically perceptible change is selected from at least one of the following groups: - Color change, - Change in brightness, - Contrast change, - Texture change, - Pattern change, - Structural change, - Change in light reflection, - Change in light scattering, - Change in transparency or opacity. [5] Module according to one of the preceding claims, wherein the display unit comprises a dust collection surface which collects dust by means of: - mechanical adhesion, - electrostatic effect, - Micro- or macrostructures, - Adhesive properties, - Fiber or nonwoven properties, - coatings or a combination thereof. [6] Module according to one of the preceding claims, wherein the display unit has several visually distinguishable states corresponding to different levels of dust deposition. [7] Module according to any of the preceding claims, suitable for wall mounting, furniture mounting, freestanding placement or fastening by means of adhesive, magnetic, plug-in or hanging elements. [8] Use of the module according to any one of claims 1 to 7 for indicating a cleaning requirement in indoor spaces. [9] Set of display units (replacement pads, replacement films or inserts) for use in a module according to claim 2. [10] Use of the module according to any one of claims 1 to 7 in vehicle interiors, in particular for indicating a dust deposit condition in the dashboard area, on storage surfaces, door surfaces or other vehicle surfaces.