(Tech Parameters Explained — Ultimate Guide)

If you want accurate pricing, correct configuration, and fewer “surprises” after order, your LED display inquiry must look less like “Please quote P3.9 outdoor screen” and more like a mini engineering spec.

This guide shows you:

• what to include in every inquiry,
• what each parameter means (in plain English),
• which specs impact price and reliability the most,
• and a copy-paste RFQ template you can send to suppliers.

Throughout the article, I’ll reference relevant solution pages on ChinaLEDScreens and related internal guides (no external links).

Quick answers (for fast quoting + AI Overview)

What details must be in every LED screen inquiry?

At minimum, include:

1. Application (indoor/outdoor, fixed/rental, façade/window/roadside, camera filming or not)
2. Location environment (city/coastal/industrial/snow/hot & humid + temperature range)
3. Installation type (fixed wall, rental, facade mesh, transparent)
4. Screen size (W×H in meters) and installation method (wall/structure/hanging/pole)
5. Viewing distance range (nearest and farthest typical viewers)
6. LED lamp bead brand ( Nationstar/Kinglight/SINYOPTO/Rayshine/Customized/etc)
7. Pixel pitch target (or let supplier propose options)
8. Brightness requirement (day/night; auto-dimming sensor or manual)
9. Control system requirement (sync vs async; signal inputs; 4K or not)
10. Refresh rate / grayscale (especially if filming)
11. Content type (text-heavy ads, video, live camera, data dashboards)
12. Working hours (hours/day, day-only, night-only, 24/7)
13. Power & voltage (local voltage, plug type, stability, surge protection)
14. Warranty + spares + maintenance expectation

Which 11 parameters change price the most?

These usually drive cost the hardest:

1. LED lamp bead brand ( Nationstar/Kinglight/SINYOPTO/Rayshine/Customized/etc)
2. Pixel pitch (smaller pitch = more LEDs per m²)
3. Brightness (higher nits = higher power/heat and LED binning)
4. LED package (lamp bead brand/spec and black-face options)
5. Driver IC and scan design (image quality & stability)
6. Refresh rate & grayscale depth (especially camera-friendly)
7. Cabinet material/precision (die-cast vs sheet metal; rental locks)
8. Protection level (IP rating, conformal coating, corrosion resistance)
9. Control system level (basic vs 4K, low latency, redundancy)
10. Service method (front access adds structure complexity)
11. Warranty + spare parts + on-site commissioning

Step-by-step: how to prepare a “professional-grade” LED inquiry

Step 1 — Define application & audience (start here)

Write one paragraph answering:

• Where is the screen used? (billboard, store façade, stage rental, control room, showroom, sports, transport hub)
• Who watches it and from how far?
• Is the content mostly text, video, live camera, or interactive?
• Is filming involved? (phones, broadcast, studio, live streaming)

If your project is a building façade solution, also include whether it’s a mesh or transparent/window application:

• Mesh façade solutions: see LED Mesh Screen
• Window/see-through applications: see Transparent LED Screen

Step 2 — Lock screen size, aspect ratio, and resolution target

Provide:

• Visible screen size: Width × Height (meters)
• Quantity: how many screens
• Preferred aspect ratio: 16:9, 21:9, custom
• Any “non-rectangular” shape (curved corners, columns, ring screens, irregular edges)

Tip: If you already know the content format (e.g., 1920×1080 or 3840×2160), tell the supplier. It helps them propose a pitch that lands on a clean pixel grid.

Step 3 — Choose pixel pitch using viewing distance + content type

Pixel pitch is the center-to-center distance between pixels; smaller pitch = higher resolution and closer viewing.

A practical way to avoid overspending is to specify your viewing distance range and let the supplier propose 2–3 pitch options.

• Planar shows that “comfortable viewing distance” increases as pitch increases, and provides a chart mapping pitch to comfortable distance.
• If you need a quick reference: P2.5 often suits mixed indoor viewing, while larger pitches fit longer distances.

Pitch selection heuristics (use as starting point)

Step 4 — Set brightness by environment (not by ego)

Brightness is measured in nits (cd/m²).

Brightness Ranges (Rule-of-Thumb)

What to put in your inquiry:

• Daytime brightness target (nits)
• Nighttime operation? (yes/no)
• Auto brightness sensor required? (recommended for energy + lifespan)

Step 5 — Confirm refresh rate, scan, grayscale (especially if filming)

If the screen will appear on camera (phones, livestream, studio), you must specify:

• Refresh rate target (commonly ≥3840Hz)
• Grayscale/bit depth expectations (smooth gradients)
• Any requirement for low scan artifacts (scan ratio is design-dependent)

Why: refresh rate and scan design influence visible flicker/scan lines on camera. Many pro panels list 3840Hz or 7680Hz refresh options.

What to write in RFQ:

• “Refresh rate ≥3840Hz, camera-friendly” (if filming)
• “Priority: stable grayscale at low brightness” (for premium visuals)

Refresh rate & power consumption examples (real product datasheet)

A Planar brochure lists refresh rates (3840/7680Hz), scan ratios, and typical/max power per m².

Step 6 — Select the control system (sync vs async) + signal topology

Two broad control modes:

• Synchronous: plays in real time from a live video source (PC/camera).
• Asynchronous: content is stored on a player and scheduled.

Your inquiry should state:

• Do you need live HDMI/DP/SDI inputs?
• Any 4K input requirement?
• Distance from control room to screen (need fiber?)
• Redundancy requirement (backup signal/power)

Also specify your preferred ecosystem if you have one (e.g., NovaStar/Colorlight) so the supplier doesn’t mix incompatible parts.

Step 7 — Plan power, voltage, plug, grounding, surge

This is where many LED projects fail—not because the screen is bad, but because the site power is unprepared.

Include:

• Local voltage (e.g., 110/220V) and frequency (50/60Hz)
• Plug/socket type (or ask supplier to provide correct plug standard)
• Voltage stability (industrial areas often fluctuate)
• Surge/lightning risk and whether SPDs are required

Example: Brazil commonly uses 127/220V 60Hz and Type N sockets. Even if your project isn’t in Brazil, this is exactly the level of clarity suppliers need.

Step 8 — Match climate + location risks to protection design

You asked to cover: hot, humid, rainy, sunny, dry, coastal, snow mountain, industrial areas. Here’s the correct way to translate that into specs.

Inquiries should describe the site like this:

• Temperature range (year-round min/max)
• Humidity range + rainy season description
• Salt fog/coastal distance (if applicable)
• Dust level (construction zone, mining, cement plant, traffic)
• Wind load risk (high-rise, tower, rooftop, open façade)
• Sun exposure direction (direct sun hours)

Then request protection measures:

• IP rating (front/rear)
• Conformal coating / anti-corrosion hardware for coastal/industrial
• Drainage + breathable design (avoid trapped moisture)

IP codes are defined under IEC 60529 and indicate dust/water protection level.
Environment → engineering choices

Step 9 — Installation + service access + maintenance plan

Include:

• Mounting type (wall frame, hanging truss, façade, roof, embedded)
• Access limitation (can technicians access rear?)
• Required service method: front access vs rear access
• Any structural limits: max weight per m², thickness limits, wind load constraints

If maintenance access is difficult (towers, rooftops, façades), request:

• Front service modules
• Quick-swap power supplies/receiving cards
• Remote monitoring and error reporting (optional but valuable)

Step 10 — Warranty, spares, training, and acceptance

A “professional inquiry” includes commercial expectations:

• Warranty period (2 years? 3 years?)
• Response time/SLA expectations
• Spare parts list and recommended percentage
• Commissioning/training requirement
• Acceptance criteria (dead pixels policy, brightness uniformity, color calibration)

Tech parameters explained (what customers worry about)

1) LED lamp bead brand (and what to specify)

Customers ask for “lamp bead brand” because it affects:

• brightness efficiency and heat,
• color consistency (binning),
• long-term stability.

What to include in inquiry:

• preferred LED package brand (if any),
• LED type (SMD/GOB/COB/MIP/DIP) and black-face preference,
• expected lifetime usage pattern (hours/day).

If you don’t want to specify a brand, specify performance outcomes:

• “No obvious color shift off-axis”
• “Stable whites and skin tones”
• “Maintain brightness under high ambient temperature”

2) Brightness and day/night usability

Brightness is not just “higher is better.” Higher brightness:

• increases heat and power design burden,
• can shorten LED lifespan if run at full output continuously.

That’s why asking for auto-dimming is often the smarter request, especially outdoors. Typical brightness guidance ranges are shown earlier.

3) Viewing distance + viewing angle

Inquiries should include:

• nearest viewer distance (m),
• typical distance (m),
• farthest meaningful distance (m),
• horizontal/vertical viewing angle requirement.

For wide public viewing areas, many products target wide viewing angles; for example, a Planar brochure lists 140°/140° viewing angles for some panels.

4) IC (driver), refresh rate, scan rate, grayscale

These are the “image quality engine” specs.

In practical RFQ language:

• “Prefer high refresh (≥3840Hz), stable grayscale at low brightness”
• “If camera use: prioritize flicker-free performance”
• “If mostly text: prioritize clarity and contrast”

Refresh rates of 3840Hz and 7680Hz are common targets in professional specs.

5) Control system (and what suppliers need from you)

At minimum, state:

• synchronous or asynchronous control requirement,
• input interfaces (HDMI/DP/SDI),
• max input resolution (1080p/4K),
• number of screens and whether they must sync.

Also state the content workflow:

• Will content come from a laptop? Media server? Broadcast switcher?
• Do you need scheduled playback when the PC is off?

6) Power supply and power consumption

Request both:

• Typical power (W/m²) and max power (W/m²)
• Total power estimation for your screen area

Real datasheets show that typical power can be far lower than max, and max can exceed ~900–1000 W/m² for some products. Industry commentary also highlights that typical consumption depends heavily on brightness settings and content.

If your project is hot, high altitude, or vibration-prone, specify that so the supplier selects appropriate PSU grade.

7) Climate/location + voltage stability

Convert “our city is humid” into numbers:

• humidity range,
• rainy season duration,
• salty air exposure distance to coast,
• temperature extremes.

And don’t skip voltage reality:

• Many projects fail because the incoming voltage is unstable or grounding is poor.
• Ask for surge protection guidance if the site has lightning risk.

Copy-paste LED Display RFQ template (send this to suppliers)

Mandatory fields (must-have)

1. Project name / country / city / site type
2. Application: indoor/outdoor, fixed/rental, façade/window/roadside
3. Screen quantity: __ sets
4. Screen size (W×H): m × m (each)
5. Viewing distance: nearest m; typical m; farthest __ m
6. Content type: text-heavy / video / live camera / mixed
7. LED lamp bead brand: Nationstar/Kinglight/SINYOPTO/Rayshine/Customized/etc
8. Pixel pitch: preferred __ mm (or propose 2–3 options)
9. Brightness: daytime target __ nits; nighttime use yes/no; auto-dimming yes/no
10. Refresh requirement: ≥__ Hz (camera use? yes/no)
11. Control system: synchronous/asynchronous; required inputs (HDMI/DP/SDI); 1080p/4K
12. Site power: V, Hz; plug type __; voltage stable? yes/no
13. Operating environment: temperature to °C; humidity __%; coastal/industrial/dust/snow/wind notes
14. Installation method: wall/structure/hanging/pole; front service required? yes/no
15. Warranty: __ years; spare parts recommendation requested
16. Delivery terms: EXW/FOB/CIF; target delivery date

Optional but recommended (to avoid change orders)

• IP rating requirement (front/rear)
• Cabinet material preference (die-cast aluminum / steel)
• Redundancy (power/signal) requirement
• Remote monitoring requirement
• Acceptance criteria: dead pixel policy, brightness uniformity, color calibration expectations
• Commissioning/training requirement

Supplier confirmation questions (high value)

• Please confirm recommended pitch based on our viewing distance & content.
• Please provide typical + max power and recommended breakers/cables.
• Please confirm service method (front/rear) and spare parts list for 2 years.
• Please advise protection measures for our climate (humidity/coastal/dust/heat).

Internal links used (5–7, incl. homepage)

• ChinaLEDScreens (Homepage)
• Outdoor LED Display
• LED Mesh Screen
• Transparent LED Screen
• How to Choose Pixel Pitch for Window Holographic LED Screens
• Contact Us