Large Lecture Hall Upgraded with LED Display
Improved visibility while supporting lectures and a wide range of events.
Project Background
The client was considering to update the aging multimedia system in a large lecture hall. While a video projector had been previously used, an LED display was adopted to address visibility challenges.
After upgrading to an LED display with high brightness and a wide viewing angle inherent to self-emissive technology, excellent visibility was achieved even when all lights in the lecture hall are turned on, compared with the previous projector-based system.
A COB LED model with excellent dust resistance and impact resistance was selected. The audio system was also renewed. Previously, a combination of front speakers and ceiling speakers had been used; however, based on the results of an acoustic simulation, the ceiling speakers were removed and line array speakers with directivity control functions were selected for the front speakers.
In addition, a remote camera equipped with a 20× optical zoom function was newly installed, enabling HyFlex lectures and lecture recording. With improved visibility and audio quality enhanced learning effectiveness is expected.
System Configuration
The large display at the front of the room is a 165-inch LED display (1.9 mm pixel pitch, COB model). An electric lift-type whiteboard is installed in front of the display, allowing lectures to be conducted using the whiteboard as before. When video content is used during lectures, the whiteboard can be stored to allow the use of the LED display.
The line array speakers adopted for this system are equipped with directivity control functions and built-in amplifiers for speaker drive, allowing sound reinforcement for the entire room using only the front speakers.
A wall-mounted remote camera has been installed, supporting a wide range of use cases including HyFlex lectures.
The wireless microphone system adopts a DECT-based standard, minimizing interference from Wi-Fi and other radio signals.
For system control, a touch-panel operation interface is installed in the AV rack beside the lectern, providing intuitive operation. The system support remote control via tablet devices, enabling flexible control of equipment and facilities from anywhere.
Testimonial
With the upgraded facilities, the room is expected to be used not only for lectures but also for various events such as academic conferences and university festivals. This expanded usage is anticipated to enhance the return on investment. Depending on the results, the client is also considering expanding the system to other classrooms.
Installed Equipment
LED Display
A 165-inch LED display was installed. The display was mounted on a newly constructed support structure at the location where the projector screen had previously been installed.
Specifications:
| Item | Specification |
| Screen Size | 165-inch(3648×2052mm) |
| Pixel Pitch | 1.9mm |
| Resolution | 1920×1080 |
| LED Type | COB 1R1G1B(FlipChip) |
| Brightness | 600～1000 nits |
Electric Lift Whiteboard
The whiteboard installed in front of the LED display is electrically operated, allowing it to be deployed or stored depending on the usage scenario.
Line Array Speakers
Through pre-installation simulation and precise on-site acoustic, the system was optimized for the size and shape of the lecture hall, delivering rich sound quality despite the removal of the ceiling speakers.
Control Panel
A user-friendly control panel with a customized user interface has been implemented for system operation.
Wireless Microphone
Wireless microphones compliant with the DECT standard were adopted to minimize the risk of radio interference.
Remote Camera
A remote camera was installed to support HyFlex lectures.
AV Rack
Equipment is consolidated in AV racks located near the lectern and in the back-of-house area.
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