I. Clarity Experience: Difference Disappears at Increased Distance
To verify the actual difference in clarity, we simulated a typical medium-sized conference room scenario:
Screen Size: 4.8 meters wide, 2.7 meters high (approximately 200 inches diagonally)
First row audience distance from screen: 3 meters
Last row audience distance: 8 meters
Viewing from 3 meters:
P2 Screen: 2.0mm pixel pitch, theoretical resolution limit approximately 1/2mm⁻¹ = 0.5 line pairs/mm. At 3 meters, the resolution limit of normal human vision (1.0) is approximately 0.5mm. This means that the P2's pixels are just at the edge perceptible to some viewers. For small font sizes (e.g., below 6pt), sensitive users may perceive slight jagged edges.
P1.8 Screen: 1.8mm pixel pitch, denser pixels. At 3 meters, most people cannot distinguish individual pixels; text edges are smoother, and image details are richer.
Viewing from 5 meters away:
Whether it's P1.8 or P2, the human eye cannot distinguish individual pixels; the difference in clarity between the two is almost negligible. For viewers in the last row at 8 meters, the viewing experience of P2 and P1.8 is completely identical.
Conclusion: If the viewing distance from the front row of the conference room is less than 4 meters, the advantage of P1.8 is evident; if it's greater than 4.5 meters, the clarity of P2 is perfectly adequate, and the difference between the two is indistinguishable to the naked eye.
II. Other Factors: Installation, Maintenance, and Brightness
1. Module Universality and Maintenance
P2: Uses a standard 320mm×160mm module, fully compatible with P2.5, P3, etc. This means spare parts are easy to procure, repair and replacement are convenient, and costs are low.
P1.8: Some brands, in pursuit of smaller pixel pitch, use 240mm×240mm or other irregularly shaped modules, which are incompatible with mainstream sizes. If repair is needed, spare parts may require custom manufacturing, resulting in long response times and high costs. Of course, there are also P1.8 products using the standard 320mm×160mm size; you should confirm with the manufacturer before purchasing.
2. Brightness and Meeting Room Ambient Light
Typical illuminance in meeting rooms is between 200-500 lux. A P2 screen is recommended to have a brightness of 600-800 cd/m², which can easily cover ambient light, resulting in a bright and clear image.
P1.8 can achieve similar brightness, but due to the denser LEDs, the drive current is slightly lower at the same brightness, and the heat generation is also slightly lower. However, in actual use, both need to be adjusted to 400-600 cd/m² to avoid glare. Therefore, the difference in brightness is not a decisive factor.
III. Practical Verification: A "Distance Test" is Recommended
Before making a final decision, we recommend using the following simple method for on-site verification:
Contact two LED suppliers and request sample modules of the same size for both P1.8 and P2 (e.g., one 320×160mm module each).
Place the two modules side-by-side in the intended installation location in the conference room and play the same test footage (including full-screen white, small-font text, charts with thin lines, and close-ups of faces).
Have several colleagues stand at the actual distance from the front row and at the middle distance to observe and judge which module is clearer and more comfortable.
Then inquire about the price. If the price difference for P1.8 is within an acceptable range and the improvement is visually apparent, choose P1.8; otherwise, P2 is perfectly adequate.
IV. Summary: P2 is a high-performance, cost-effective choice for most conference rooms.
Final Conclusion:
For the vast majority of medium-sized and larger conference rooms (front row distance ≥ 3.5 meters), P2 is the most cost-effective choice. It offers nearly indistinguishable clarity from P1.8 in actual viewing at approximately a 30% price advantage, while being easy to maintain and having interchangeable spare parts.
P1.8 is suitable for the following few situations: small, high-end conference rooms (front row < 3 meters), scenarios with extremely high requirements for text edge sharpness (such as code review, design draft proofreading), or those with a sufficient budget who want a one-stop solution.
In short: If your meeting room isn't particularly small, save your budget on P1.8 and choose P2 instead. Invest the savings in a better sound system, intelligent control system, or renovation, and the overall improvement in meeting experience will be more noticeable.
