How is Double-Sided Front and Rear Display Achieved on LED Transparent Screens?

3 views admin 2026-01-28

The double-sided front and rear display of LED transparent screens is realized by special structural design and optical/circuit optimization, which enables display units to emit light in two directions and be controlled independently while maintaining high transmittance. The mainstream technical approaches are divided into three categories: double-panel superposition, double-sided LED mounting on a single substrate, and dual light emission from a single light source, each with its own implementation logic and applicable scenarios.
Mainstream Implementation Technical Schemes
Scheme 1: Back-to-Back Superposition of Double Panels
Structure: Two independent LED transparent screens are attached back-to-back with a tiny gap reserved in between, sharing or having independent power supply and control systems.
Principle: Each screen is responsible for single-sided display, with its own independent LED beads and drive circuits, and can play the same or different content.
Scheme 2: Double-Sided LED Mounting on a Single Substrate
Structure: Transparent conductive circuits (ITO/nanosilver) are fabricated on both the front and back sides of the same transparent substrate (e.g., glass, PET), and micro LED beads are mounted with their positions on the two sides precisely aligned.
Principle: The substrate is made of high-transparency materials to ensure bidirectional light penetration; the double-sided circuits are driven independently to control the display content on the front and back sides separately; ultra-thin packaged LED beads are adopted to minimize the impact on transmittance.
Scheme 3: Dual Light Emission Design with a Single Light Source
Structure: Based on a single panel, special optical components (e.g., double-sided lenses, micro-reflectors, light guide structures) are used to make a single LED light source emit light evenly in two directions.
Principle:
Double-sided lens solution: Custom double-sided lenses are equipped for LED beads to distribute light evenly to the front and rear directions;
Micro-rotary reflection solution: The angle of reflectors is controlled by a Micro-Electro-Mechanical System (MEMS) to switch the light emission direction;
Light guide plate solution: Light guide plates and optical films are used to guide light from a single-side light source evenly to both sides.
Core Technical Support
1. Transparent Circuit Technology
Dual-layer transparent conductive layer: Materials such as ITO, nanosilver wires or ultra-thin copper foil (3μm) are adopted, with a light transmittance of over 90% to reduce circuit occlusion.
Independent double-sided wiring: The front and rear circuits are independent of each other, and signal connection is realized through vias or side leads to avoid short circuits and interference.
2. Drive and Control Technology
Independent drive ICs: Independent driver chips are equipped for the front and back sides, supporting independent control of double-sided content (able to display the same or different images).
Synchronous control algorithm: Ensures the synchronization of display content on both sides and avoids image delay or misalignment.
Low-power design: The drive circuit is optimized to reduce energy consumption during double-sided display (usually 30% lower than traditional double-sided screens).
3. Optical Optimization Technology
High-transparency LED packaging: Packaging processes such as COB (Chip on Board) and COG (Chip on Glass) are adopted to reduce light occlusion by packaging materials.
Viewing angle matching design: Ensures the consistent viewing angle range of double-sided display and avoids uneven brightness during viewing.
Anti-reflection treatment: The substrate surface is coated with an AR (Anti-Reflection) layer to reduce ambient light reflection and improve display contrast.
Key Challenges in Achieving Double-Sided Display
Balance between transmittance and display effect: The double-sided structure may reduce transmittance and affect the viewing experience.
Heat dissipation issue: Simultaneous operation of double-sided LED beads leads to concentrated heat, which impacts service life and stability.
Signal interference: Close operation of double-sided circuits is prone to electromagnetic interference.
Viewing angle consistency: The optimal viewing angles of the two sides may be inconsistent, resulting in differences in viewing effects.
Summary
The essence of realizing double-sided display on LED transparent screens is to solve the two core problems of bidirectional light emission and independent control through structural innovation and technology integration on the premise of maintaining high transmittance. From the mature back-to-back superposition of double panels, to the advanced double-sided LED mounting on a single substrate, and then to the innovative dual light emission design with a single light source, the technical approaches are constantly evolving. This drives the wide application of double-sided transparent screens in fields such as commercial advertising, exhibition display and architectural decoration, and realizes the value multiplication effect of "one screen for two uses".