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Key display test results at a glance
- The resolution should match the screen size and the content displayed. Newer displays usually have a 4K UHD resolution. In some cases, full HD displays are also possible, for example with videowall displays, as the combination of several displays then results in a higher resolution overall. 4K displays ensure that text and image details remain razor-sharp and easy to read, even with larger screen diagonals
- With a videowall, several displays are arranged next to each other to create a large overall picture. As a rule, special videowall displays are used for this, as they have several important advantages. On the one hand, these displays have a particularly narrow frame to avoid large black bars between the individual displays. On the other hand, the displays must have the ability to split a single image signal between them. This is possible with daisy chain technology, for example. Additional setting options for colour calibration ensure that all displays can be set to exactly the same brightness and colour temperature.
- The two most widely used touch technologies are infrared and capacitive.
- With infrared technology, a fine, invisible infrared grid is placed over the display. When the finger or a stylus breaks through the grid, the position is recognised. This technology is inexpensive, robust and responds to inputs with fingers, even with gloves, as well as with any pen. It is therefore used in many displays, but is less precise than capacitive technologies.
- With capacitive displays, similar to a smartphone, an electric field is disturbedby the touch of your finger (or a special pen). This technology is very precise and responsive, but also more expensive. As a rule, it only works with special pens in addition to your finger
- The required brightness of the displays depends heavily on the application and the installation location. As a rule of thumb, if the display is to be used in direct sunlight or outdoors, at least 700 cd/m² is required, although a higher brightness is recommended for better recognisability.When used in rooms with artificial lighting but without direct sunlight, 500 cd/m² is often sufficient . If the lighting conditions in the room can be regulated and the light dimmed as required, 350-450 cd/m² is sufficient
- Displays are often rated according to their operating time (e.g. 16/7 or 24/7). The reason for this lies in the components used: displays for 24-hour use are equipped with particularly durable materials. These include, for example, power supply units that can withstand the high continuous load. In addition, fans or passive heat sinks are installed to regulate the heat. The panels are also more resistant to static images (e.g. a company logo) that are permanently displayed. Overall , displays are better able to withstand the high loads caused by massive heat build-up in the device.A display should always be operated within the specified operating time. Otherwise, irreparable damage to the device may occur, which is not covered by the warranty
- When selecting a display mount, you should consider the size and weight of your display. Check the VESA mounting points and make sure they are compatible with your display. Most mounts can accommodate different VESA hole patterns and are therefore compatible with various displays. It is also important that the weight of the display, including accessories, does not exceed the maximum load capacity of the mount. Also consider where you want to mount the display: on the wall, on the ceiling or on a trolley. In the case of wall or ceiling mounting, these must be able to bear a corresponding load. A trolley is particularly interesting for flexible use of the displays.Special multi-brackets can be used for videowalls, which can hold several displays at the same time. You can find the right mount for your display at visunext
- When choosing the signage software or content management software (CMS), it must be clarified whether it runs directly on the display (system-on-chip; SoC) or requires an external player. Other important factors include user-friendliness when creating content, possible integration into calendar systems such as Microsoft 365 for room bookings and the decision as to whether flexible cloud management or a local on-premise solution on your own server is preferred.
- Exactly which connections should be considered when buying a display depends very much on your specific requirements and where the display will be used. As a rule, displays should have connections such as HDMI and/or Displayport for video and audio, LAN for networking and remote maintenance and USB for connecting peripheral devices. USB-B for touch transmission and USB-C for the combined transmission of image, sound, data and power are particularly useful for meeting and classroom displays
- To avoid tangled cables on the conference table, there are various common methods that can be used to supply displays with content wirelessly. One option is integrated consumer standards such as Miracast (for Windows/Android) or AirPlay (for Apple). However, these can sometimes be unreliable in corporate networks in terms of security and bandwidth. The most robust and simplest method is therefore to use professional presentation systems. Such systems, such as Barco ClickShare or Kindermann Klick&Show, use a transmitter that is plugged into the laptop and a receiver on the display. In addition, some presentation systems can also be connected to video conferencing technology such as cameras, microphones and speakers so that you can access these devices from your laptop.
