Choosing a GOB LED module should begin with the display project, not with the technology label. Two modules may both be described as GOB and share the same pixel pitch, yet differ in dimensions, resolution, PCB construction, bending capability, brightness, protection, maintenance access and control-system requirements.
The correct choice therefore depends on where the screen will operate, how it will be viewed, what shape it must form and how it will be installed and serviced. A flat conference-room wall, a cylindrical museum display and a high-brightness outdoor information screen cannot be specified from the same checklist.
The short answer Select a standard indoor GOB module for conventional flat video walls, an integrated GOB module when a larger matched assembly simplifies the system, a flexible GOB module for engineered curves, and an outdoor GOB module only when the complete brightness and environmental-protection configuration suits the site.
1. Start With the Project, Not the Technology Label
Before comparing product codes, define the operating environment, nearest viewing distance, total screen dimensions, screen shape, ambient light, expected contact, operating hours and maintenance route. Also establish whether the requirement is a new display, an expansion of an existing screen or a replacement for an installed module.
GOB describes an added protective treatment over an assembled SMD pixel surface. It does not independently define pixel density, module format, indoor or outdoor suitability, brightness or compatibility. These characteristics belong to the complete product.
A practical selection sequence is: application environment, screen geometry, viewing requirement, module structure, module size, optical and electrical performance, service access, protection level, control-system compatibility and production batch.
2. The Four Main GOB Module Structures
Figure 1. The GOB surface treatment may be shared, but the mechanical format and intended application are different.
Standard indoor GOB modules
A standard indoor GOB module uses a rigid PCB and a regular module format, commonly 320×160mm within the current PrimeLEDModules range. It is intended for flat cabinet systems and front-service video walls in conference rooms, control rooms, corporate spaces, retail environments, museums and exhibition venues.
This structure is usually the most straightforward option when the cabinet has already been designed around a standard module grid. Verify module thickness, magnetic or screw positions, front-removal method, connector orientation, cabinet flatness and access to the receiving card and power supply.
Integrated indoor GOB modules
An integrated GOB module combines a larger display area and associated structure into one assembly. A 320×480mm format can replace several smaller module positions in a compatible system, reducing some data and power connection points and simplifying repeat installation.
Integrated does not automatically mean universally compatible or always better. The larger assembly requires a matching cabinet, electrical architecture and replacement strategy. One module failure affects a larger screen area, and spare-part size, transport and handling must be considered.
Indoor flexible GOB modules
Flexible GOB modules use a flexible PCB, soft rear structure and usually magnetic mounting. Current formats such as 240×120mm and 320×160mm can support concave, convex, cylindrical, wave-shaped and other engineered indoor surfaces.
Flexible does not mean foldable without limits. The permitted bending direction, minimum radius, repeated-bending tolerance, magnet layout and resin flexibility must match the structure. The steel frame or formed cabinet establishes the final geometry; the module follows that controlled surface.
Outdoor high-brightness GOB modules
Outdoor GOB modules combine the protected pixel surface with outdoor-grade brightness and a defined environmental structure. Depending on the model, installation may use screws, magnets or both, while service may be available from the front, rear or both sides.
The word outdoor must be supported by finished-module brightness, front and rear protection claims, connector design, temperature range, UV resistance, cabinet drainage and installation details. An indoor GOB module should never be moved outdoors simply because its front surface is coated.
3. Standard, Integrated, Flexible and Outdoor Compared
| Selection factor | Standard indoor | Integrated indoor | Indoor flexible | Outdoor GOB |
|---|---|---|---|---|
| Typical shape | Flat | Flat | Flat, concave, convex or cylindrical | Flat or project-specific outdoor structure |
| Common format | 320×160mm | 320×480mm | 240×120mm or 320×160mm | Commonly 320×160mm |
| PCB structure | Rigid | Rigid integrated assembly | Flexible | Rigid outdoor construction |
| Typical mounting | Magnetic or cabinet-specific | Matched integrated system | Magnetic curved structure | Screw, magnetic or combined |
| Typical service | Front | Front | Front | Front, rear or dual service |
| Main selection risk | Electrical and cabinet mismatch | Dependence on dedicated structure | Incorrect radius or bending direction | Incomplete brightness or environmental specification |
4. How to Select Pixel Pitch
The current GOB collection covers pixel pitches from P1.25 to P2.5. Pixel pitch is the center-to-center distance between adjacent pixels. A smaller pitch provides more pixels within the same physical area, but it also increases data load, component density, calibration demands and normally project cost.
P1.25
P1.25 is suited to close-viewing applications that require detailed text, graphics and fine image structure. It is relevant to control rooms, premium meeting rooms, studios and high-resolution commercial displays. The cabinet, calibration and processing system must be sufficiently precise to benefit from the additional density.
P1.53 and nearby pitches
P1.53-class products provide a useful balance between fine detail and project economics. They can support medium-to-close indoor viewing and selected high-resolution outdoor applications when brightness and environmental protection are appropriate.
P1.86 and P1.875
These pitches balance resolution, screen size and viewing distance for conference, exhibition, retail and creative installations. Flexible options can be especially practical when a curved surface requires good detail without moving to the highest pixel density.
P2 and P2.5
P2 and P2.5 are practical for larger displays and longer viewing distances. They reduce pixel count per square meter compared with P1.25 while still supporting detailed commercial and public-information content. Final suitability depends on screen size and the smallest information that must remain readable.
The smallest pitch is not automatically the best choice. If the audience stands farther away, the extra pixels may provide little visible benefit while increasing processing, power, spares and budget requirements.
5. Viewing Distance Is a Range, Not a Single Formula
Simple rules that convert pixel pitch directly into one viewing distance are useful only as an initial reference. Comfortable and acceptable viewing distances also depend on content type, text size, visual acuity, total screen size, ambient light and the amount of visible pixel texture the project will accept.
A command center displaying dense maps has different requirements from a retail wall showing large video content. A camera can also reveal moiré or scan behavior that a person does not notice. Representative content should therefore be tested at the actual nearest viewing position and, where relevant, through the intended camera system.
6. Module Size and Complete Screen Geometry
Module dimensions affect more than mechanical installation. The screen width and height should normally be divisible by the selected module or cabinet grid. Module resolution determines cabinet resolution, total screen resolution, sending-system load and the aspect ratio available for content.
A 240×120mm flexible module can provide more layout increments around a small or complex curve. A 320×160mm module aligns with many standardized cabinet systems. A 320×480mm integrated module reduces the number of separate module positions but requires a dedicated matched structure.
Before ordering, calculate the horizontal and vertical module count, total physical dimensions, total resolution and cabinet arrangement. Confirm whether the final screen matches the intended video ratio or requires content cropping, scaling or custom processing.
7. Selecting GOB Modules for Curved and Cylindrical Displays
Figure 2. Flexible modules follow an engineered support surface. The module alone does not define or stabilize the final radius.
For a curved display, specify whether the surface is concave or convex, the required radius, screen height, arc length and viewing direction. For a cylinder, provide the diameter or circumference, height, coverage angle and whether a complete 360-degree closure is required.
The module width must be reconciled with the circumference. If the circumference is not close to a whole number of module widths, the final seam may be too wide, modules may be forced beyond their permitted radius or the supporting structure may require adjustment.
Also confirm the bending axis. A module designed to curve along its width may not be suitable for curvature along its height. Compound curves generally require a dedicated product and structure rather than forcing a single-axis module over a two-directional surface.
8. Choosing the Correct Brightness
Indoor brightness
Indoor brightness should be matched to ambient light, viewing comfort, black-level requirements and operating hours. Excessive brightness can reduce comfort, increase power and heat, and make low-gray calibration more demanding. The useful question is whether the display maintains contrast and grayscale at its normal operating brightness.
Outdoor brightness
Outdoor selection must consider direct sun, orientation, shading, seasonal changes and required nighttime dimming. The quoted value should apply to the finished GOB module because the protective material becomes part of the optical path. Power, thermal management and local brightness restrictions should be evaluated at the same time.
9. Refresh Rate, Scan Mode and Camera Performance
A refresh-rate figure such as 3840Hz is important, especially for camera-facing displays, but it is not a complete camera-performance specification. Driver IC, PWM implementation, scan ratio, grayscale depth, operating brightness, camera shutter speed, frame rate and synchronization all affect the recorded result.
Broadcast, virtual production, livestreaming and photographed commercial installations should be validated with the actual camera chain. Two modules quoting the same refresh rate may perform differently at low brightness or under a short shutter time.
10. Front Service, Rear Service and Dual Service
Front-service modules are useful when a display is installed against a wall or when no rear maintenance aisle is available. Magnets and front-removal tools may allow the module to be extracted from the viewing side.
Rear service is common when outdoor cabinets or fixed structures provide safe access behind the screen. Dual-service designs offer additional flexibility for transportation, public-information and other sites where access conditions may vary.
Module service direction does not automatically define service access for the complete display. Confirm whether power supplies, receiving cards, data cables and structural fasteners can also be reached from the required side.
11. New Display Versus Replacement Selection
A new display allows pixel pitch, module format, cabinet, power, control system and maintenance strategy to be designed together. A replacement project begins with constraints established by the installed screen.
For replacement, the same pitch and dimensions are not enough. Verify module resolution, PCB hole positions, thickness, magnet layout, HUB connector and pinout, power connector and voltage, scan mode, driver IC, receiving-card configuration, surface finish, brightness, calibration data and production batch.
Two P1.25 320×160mm GOB modules can be mechanically, electrically and optically incompatible. Clear photographs of the front, rear PCB, connectors, driver markings and model label are essential before a replacement is selected.
12. Why Different GOB Modules Should Not Be Mixed
A display should not casually mix uncovered SMD with GOB, different GOB finishes, different driver configurations or unrelated production batches. Even if the modules light, the screen may show differences in black appearance, reflection, brightness, color, low-gray behavior and camera artifacts.
Batch-matched spare modules are the safest maintenance strategy. Their calibration data should be retained with the project documentation, and stored modules should be protected from unsuitable temperature, humidity and contamination.
Figure 3. Flat and cylindrical displays can share GOB surface protection while requiring completely different module structures and mechanical planning.
13. Recommended GOB Module Selection Workflow
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Define the environment: indoor or outdoor conditions, ambient light, temperature, moisture, dust and expected contact.
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Confirm geometry: total dimensions, flat or curved surface, radius, diameter and viewing direction.
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Select pixel pitch: use nearest viewing distance, content detail and camera requirements.
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Choose structure and format: standard, integrated, flexible or outdoor; then confirm module dimensions.
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Verify performance: finished brightness, refresh rate, scan mode, driver IC, grayscale and thermal behavior.
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Plan installation and service: mounting, cabinet, front or rear access, wiring and removal tools.
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Confirm compatibility and spares: interfaces, control system, calibration data and batch-matched replacement modules.
14. Frequently Asked Questions
Which GOB module is best for a flat indoor video wall?
A standard rigid indoor GOB module is normally the most direct choice. An integrated module may be appropriate when the cabinet is specifically designed for its larger format.
When should an integrated GOB module be used?
Use it when the larger assembly, reduced connection count and matched cabinet structure provide a clear installation or system benefit.
Can a flexible GOB module be installed flat?
Often yes, provided the supporting structure, magnet layout and manufacturer instructions permit it. A rigid module may still be simpler for a permanently flat screen.
How is module quantity calculated for a cylinder?
Divide the designed circumference by the module width in the bending direction, then check whether a whole-number layout closes correctly within the permitted radius and seam tolerance.
Is P1.25 always better than P1.875?
No. P1.25 offers higher density, but P1.875 may satisfy the viewing requirement with lower processing and project cost.
Can an indoor GOB module be used outdoors?
No, unless the exact model is designed and qualified for the required outdoor brightness and environmental conditions.
Does front service mean the entire screen is front serviceable?
Not necessarily. Power supplies, receiving cards, cables and cabinet fasteners must also be accessible from the front.
Can two GOB modules with the same size be mixed?
Not safely without full mechanical, electrical and optical verification. Size and pitch alone do not establish compatibility.
15. Information to Prepare Before Ordering
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Pixel pitch, module size and module resolution
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Indoor or outdoor environment and required protection
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Flat, concave, convex, cylindrical or custom screen shape
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Total display dimensions, nearest viewing distance and content type
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Required brightness, refresh rate and camera conditions
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Front, rear or dual-service requirement
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Control system, driver IC, scan mode, data interface and power connection
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Cabinet structure, installation method, quantity, spare requirement and project schedule
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For replacement: clear front, rear PCB, connector, IC and model-label photographs
Explore GOB LED Module Options
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Standard Indoor GOB Modules for flat professional LED video walls.
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Integrated Indoor GOB Modules for matched larger-format display systems.
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Indoor Flexible GOB Modules for curved, cylindrical and custom-shaped installations.
For outdoor GOB requirements, new display engineering or replacement matching, please CONTACT US and provide the project information listed above before ordering.