LED Light Box Billboard with Hydraulic Lift and Dust Cleaning System

The problem

Outdoor and indoor light box billboards often face two operational challenges: maintenance difficulty and dust accumulation. Standard designs are typically bolted directly to walls or frames, requiring tools and time to open for bulb replacement or wiring checks. Furthermore, the display surface collects dust over time, which reduces brightness and clarity, especially in exposed environments. Manual cleaning is frequent and labor-intensive. Existing solutions rarely integrate mechanical assistance for both accessibility and cleanliness, leading to higher long-term upkeep costs and potential downtime for advertisers.

The solution

This patent describes a light box billboard that integrates hydraulic mechanics for movement and a mechanical system for cleaning. The core of the design is the cabinet (1), which houses the components.

1. Vertical Lift: Two first hydraulic cylinders (2) are mounted at the top sides of the cabinet’s inner cavity. Their piston bars (3) extend through the bottom of the cabinet to connect to the top sides of the LED billboard (4). This allows the panel to be raised or lowered within the frame.
2. Angle Adjustment: A third hydraulic cylinder (24) connects to a second casing (26) and a pendant (27) on the right side. By extending the piston rod, it changes the tilt angle of the entire assembly relative to the mounting point.
3. Cleaning Mechanism: Inside the cabinet, a motor (10) drives a round brush (29) via bearings (9). The brush rotates against the surface of the LED panel to sweep away dust.
4. Dust Collection: A dust-catching board (14) and sweep-up pipe (15) channel the swept dust into a dust catcher (16) located at the bottom of the cabinet, preventing it from scattering back onto the display or the environment.
5. Mounting System: The cabinet attaches to a fixed wall plate using a first sleeve (17) fitting over a first pendant (18) and a second pendant (27) inserting into a second casing. This dual-point lock secures the unit but allows it to be pulled out for service without removing the wall bolts.

Who it is for

• Retail Store Owners who need bright, clean signage that is easy to update when product lines change.
• Advertising Agencies managing large portfolios of physical displays where maintenance speed impacts client satisfaction.
• Facility Managers in malls or airports looking to reduce the frequency of manual cleaning crews for vertical displays.
• Signage Manufacturers seeking to differentiate their products with integrated mechanical features like auto-cleaning and adjustable angles.

How it works

The main parts

The device relies on a coordinated set of mechanical and electrical components housed within the protective cabinet shell.

Operating Steps

1. Installation: The fixed plate (19) is bolted to the wall. The cabinet (1) is slid onto the pendants (18, 27), locking it in place via the sleeves and casings.
2. Display Setup: The operator activates the third hydraulic cylinder (24) to tilt the display to the desired viewing angle.
3. Maintenance Access: When bulbs or wiring need checking, the first hydraulic cylinders (2) raise the LED panel (4) within the cabinet frame, exposing the interior. Alternatively, the entire unit can be detached from the wall mounts for bench repair.
4. Cleaning Cycle: Periodically, the processor (12) triggers the motor (10). The round brush (29) rotates, sweeping dust across the panel. The airflow or mechanical action directs dust into the pipe (15) and down into the catcher (16).

Applications

Shopping Mall Kiosks

Malls have high traffic and dust levels. The auto-cleaning feature maintains the brightness of promotional displays without requiring staff to climb ladders for wiping. The adjustable angle helps direct attention to specific storefronts.

Airport Gate Areas

Airports require clear, legible signage for flight information or advertisements. The robust hydraulic lift allows technicians to quickly access the LED modules for repairs during short turnaround windows between flights, minimizing disruption.

Street-Facing Retail Windows

Store owners often struggle with keeping window displays clean from road dust. The enclosed cabinet protects the mechanism, while the internal brush keeps the visible glass or lens surface clear, ensuring ads remain vibrant day after day.

Exhibition Booths

Trade shows demand flexible setups. The quick-release mounting allows booths to be dismantled and reassembled rapidly. The angle adjustment lets organizers optimize visibility based on booth layout and crowd flow.

Where it is less suitable

• Very Small Displays: The hydraulic and motor systems add bulk; this design is not efficient for compact desktop signs.
• Extreme Weather Exposure: While the cabinet protects internals, the external brush mechanism may require additional sealing for heavy rain or snow zones not specified in the patent.
• Static Permanent Installations: If the sign never needs angle changes or cleaning, the added cost and complexity of hydraulics and motors may not be justified compared to simple fixed frames.