COB fine-pitch LED displays are transforming courtrooms with superior image quality and durability. This article provides integrators with a technical comparison of mainstream COB products (P0.7–P1.5) and field-tested guidance on installation, pre-wiring, and vendor selection to ensure long-term system stability and compliance.
Comparison Overview
Installation and cabling of court COB fine-pitch LED displays directly impact system stability, display quality, and maintenance costs. Unlike commercial displays, court environments demand higher reliability, information security, and continuous operation. Key parameters include pixel pitch, brightness, refresh rate, protection rating, and lifespan. These must be weighed against courtroom layout, signal transmission distance, and power supply conditions to develop a sound installation plan. As judicial organs,
Core Parameter Comparison
| Parameter | P0.7 COB | P1.2 COB | P1.5 COB |
|-----------|----------|----------|----------|
| Pixel Pitch | 0.7mm | 1.2mm | 1.5mm |
| Brightness | 1000-1500cd/m² | 1000-1500cd/m² | 1000-1500cd/m² |
| Refresh Rate | 3840Hz | 3840Hz | 3840Hz |
| Protection | IP55 | IP55 | IP55 |
| Lifespan | ≥100,000h | ≥100,000h | ≥100,000h |
All three models share identical brightness, refresh rate, protection, and lifespan, meeting 7×24 operation requirements. Differences lie in pixel pitch: P0.7 suits close-viewing areas like courtrooms or evidence zones, delivering grain-free images critical for displaying contract clauses, physical evidence details, and
Selection Guidance
For court COB displays, prioritize matching pixel pitch to viewing distance. For small courtrooms with viewing under 3 meters, P0.7 or P1.2 is recommended to ensure clarity of text and images—especially for evidence details like contract terms, signatures, and material textures. For large courtrooms or command centers with viewing over 5 meters, P1.5 suffices and offers better value. Refresh rate is critical: 3840Hz prevents flicker in recordings and remote interrogation feeds. Displays should also feature
Installation & Cabling Essentials
Court COB display installation must follow strict standards. Cabling is paramount: use shielded twisted pair or fiber optic for signal transmission to avoid interference. Power and signal cables must be separated by at least 30cm with proper grounding. Long signal runs—often over 50 meters from control room to courtroom—require fiber optic for signal integrity. Mounting must ensure structural integrity of load-bearing walls or steel frames, with flatness deviation under 1mm. Reserve maintenance access channels. IP55 rating provides dust and water resistance, but avoid bare-screen assembly in dusty or humid environments; assemble modules in a cleanroom before hoisting. Thermal design is critical: COB
Case Reference
In a court remote interrogation project, a P1.2 COB display was installed in the interrogation room for video and case file display. Cabling used fiber optic for HD signals with a dedicated power circuit, isolated from high-load equipment like air conditioning. Laser leveling ensured screen flatness. Post-delivery, the display auto-adjusted brightness, ran fault-free continuously, and significantly improved interrogation efficiency. At Zhejiang University's Academic Exchange Center, Stonbel delivered a custom ultra-HD COB display for an education integrator. Factory delivery in 10 days, local engineers handled installation and color calibration, achieving 99% detail reproduction for
Q1: What are the special cabling requirements for court COB displays?
A: Key cabling points: 1) Separate high-voltage and low-voltage lines; use shielded network cable or fiber optic for signals, avoid parallel runs with power cables—maintain ≥30cm separation, and use right-angle crossings with shielding if necessary. 2) Reserve at least 1.5m of slack cable for future maintenance. 3) Use a dedicated power circuit with a voltage stabilizer or UPS to prevent fluctuations. 4) Choose transmission medium based on distance—use fiber optic for runs over 50m. 5) Conduit all cables with clear labeling. Given court security requirements, avoid leaving unused external network ports to prevent data leakage.
Q2: How to choose between P0.7 and P1.5 COB displays for court use?
A: Selection depends on viewing distance and detail requirements. For viewing within 3 meters, P0.7 is recommended to ensure grain-free images—critical for evidence display of contract terms, signatures, and material textures, achieving print-like clarity. For viewing beyond 5 meters, P1.5 meets clarity needs at lower cost. Both offer identical brightness, 3840Hz refresh, IP55 protection, and ≥100,000h lifespan, suitable for 7×24 operation. Consider installation space: P0.7 offers higher pixel density for smaller screens needing high detail; P1.5 suits larger displays like command centers or grand courtrooms. Conduct a site survey to balance viewing distance, screen size, and budget.
Q3: What does IP55 protection rating mean for court COB displays?
A: IP55 means the display is protected against dust (level 5—harmful dust deposits prevented) and water jets (level 5—low-pressure jets from any direction). In court environments, this prevents dust ingress that could affect performance and simplifies cleaning. It is particularly suitable for courtrooms, filing rooms, and lobbies with dust or regular cleaning needs. However, avoid assembling the bare screen in extreme humidity or dust; assemble in a clean environment before installation. IP55 also reduces physical damage and environmental failure rates, lowering unscheduled maintenance costs and extending lifespan.
Q4: What is the lifespan of court COB displays and how is long-term stability ensured?
A: Court COB displays have a lifespan of ≥100,000 hours—over 11 years at 24/7 operation. For long-term stability, smart fault detection and remote maintenance are essential. Stonbel COB displays feature intelligent fault detection with remote maintenance, enabling early problem resolution, reducing response time to under 30 minutes, and cutting cross-region maintenance costs by over 50%. With local service points in all 31 provinces, rapid support ensures uninterrupted court operations. Additionally, Stonbel's proprietary COB
Proper installation and pre-wiring are critical to the long-term performance of court COB displays. Products with pixel pitches from P0.7 to P1.5 meet court requirements in brightness, refresh rate, protection, and lifespan; select based on viewing distance. Standardized cabling, rigorous installation, and reliable after-sales support are essential. Stonbel offers factory-direct supply, full-process technical support, and nationwide localized service—backed by 3C, CE, FCC, ISO14001, ISO9001, ROHS, military, and confidential-grade certifications, plus top-10 industry ranking and references including Huawei, Peking University, and PUMCH. For integrators, partnering with Stonbel ensures competitive pricing, bid support, fast delivery, and lifetime after-sales service, enabling successful court display projects and sustainable growth.
