Magnetically Repositionable LED Advertising Panel

The problem

Retail stores, event venues and public spaces often rely on fixed-layout LED signs. When the promotional message needs to change, the business either swaps the entire board or uses a fully programmable pixel matrix, both of which add cost and complexity. Simple static boards cannot adapt to seasonal campaigns, daily specials or rotating sponsor logos without physical replacement. According to the patent, the goal is an advertising panel whose display pattern can be adjusted to specific needs without dismantling the shell, making it convenient to regulate the position of each LED lamp bead.

The solution

1. The shell (1) consists of an upper transparent plate (3) and a bottom reflector (5). Multiple LEDs (2) are arranged between them.
2. A transparent conductive film (4) coats the inner surface of the upper plate, and a reflective conductive film (6) coats the inner surface of the bottom plate. These two films supply positive and negative voltage respectively.
3. Each LED includes a lamp bead (7), a ferromagnetic base (10), a return spring (9) and a leaf spring (8). The lower end of the lamp bead is fixed to the top of the ferromagnetic base.
4. The leaf spring sits at the upper end of the lamp bead and presses upward against the transparent conductive film. The return spring is fixed to the underside of the ferromagnetic base and presses downward against the reflective conductive film.
5. To move an LED, an electromagnet (11) is placed on the outside of the bottom reflector. It attracts the ferromagnetic base, compressing the return spring so the module drops slightly and can be dragged across the panel.
6. When the electromagnet is switched off, the return spring pushes the module back up, restoring electrical contact through both springs.

Who it is for

• Independent retail shops that rotate window promotions weekly and want a physical illuminated sign they can update themselves without buying new hardware each time.
• Event rental companies supplying signage for trade shows, conferences and pop-up markets where every client needs a different logo or directional text.
• Educational institutions and makerspaces looking for a hands-on display technology demonstrator that shows how magnetic actuation and conductive films interact.
• Menu board operators in cafes or food courts that change item highlights daily but prefer large, bright physical indicators over small pixel screens.

How it works

The main parts

Repositioning steps

1. Activate the electromagnet - place the electromagnet (11) against the outside of the bottom reflector (5) near the target LED and switch it on.
2. Compress the spring - the magnetic field attracts the ferromagnetic base (10), pulling the entire LED module (2) downward and compressing the return spring (9). This breaks or loosens the pressure of the leaf spring (8) against the transparent conductive film (4).
3. Slide the module - move the electromagnet along the outside of the bottom reflector. Because the magnet holds the base, the LED drags across the interior space to the desired coordinate.
4. Release - switch off the electromagnet. The elastic force of the return spring pushes the ferromagnetic base back up.
5. Re-establish contact - the leaf spring at the top of the lamp bead presses firmly against the transparent conductive film again, and the return spring (or its conduction disk) presses against the reflective conductive film, completing the circuit so the lamp bead lights up in its new position.
6. Repeat - perform the same steps for each remaining LED to build the full graphic or text pattern.

Applications

Retail storefront windows

Shop owners arrange the lamp beads to spell out weekend sale prices or seasonal greetings. When the promotion ends, they use the electromagnet to drag the beads into a new word without replacing the board or dealing with fragile wiring.

Trade show booths

Exhibitors rent booth space for short events and need their company name lit up quickly. The rental provider sets the beads before shipping, and if the exhibitor wants to highlight a different product line on day two, the on-site staff repositions the modules in minutes.

University engineering labs

Instructors use the panel to demonstrate how transparent conductive coatings deliver power to moving contacts. Students practice mapping coordinates and operating the electromagnet, turning a theoretical lesson on circuits and magnetism into a visible result.

Hospitality wayfinding

Hotels and conference centers mount these panels near elevators to point guests toward specific banquet rooms. As the daily schedule changes, the facilities team slides the LEDs to form new arrows or room numbers rather than printing paper signs.

Cafe daily specials

A cafe highlights its “soup of the day” by arranging a few bright beads around the menu item’s printed card behind the transparent plate. The visual emphasis shifts as the kitchen rotates dishes, keeping the physical menu board dynamic.

Where it is less suitable

• High-resolution video or scrolling text - this design moves discrete lamp beads manually, so it cannot replicate the thousands of pixels needed for video playback or rapid scrolling messages.
• Outdoor weather exposure - the patent describes a shell, but the sliding mechanism relies on spring contact against conductive films, which may degrade under extreme temperature swings or heavy condensation unless specifically ruggedized.
• Fully automated remote updates - because an operator must physically hold the electromagnet against the panel to move each bead, it does not support software-driven content scheduling from a central server.