When we create a profile for a device, we make sure that device is in a stable and repeatable state. As long as that device never changes, you should not need to re-profile. In experience, however, this is an unrealistic expectation. Below are guidelines and information about profiling different kinds of devices.
CRT Displays
Traditional cathode-ray tube displays will shift over time due to burn-in, phosphor fading and diminished efficiency of the cathode and intensity of the electron beam. CRTs are also very sensitive to electro-magnetic fields and changes in power supply voltage. We recommend keeping speakers, motors and other monitors away from your profiled display to help reduce these effects. Variances in the line voltage supplied to your facility can also change the behaviour of your display, so a line conditioner or uninterruptible power supply (UPS) is suggested.
- For the hobbyist, profiling once or twice a months should be sufficient.
- For individuals using their system frequently, we recommend profiling once a week.
- For professionals who rely on the accuracy of their display for their livelihood, we recommend profiling daily.
In general, it is safer to profile more frequently rather than less frequently.
LCD Displays
Liquid-crystal displays tend to be more stable than CRT displays because of their design. Each pixel is fixed in place rather than being "painted" by an electron beam many times a second. This allows them to be more consistent and color displayed on one part of the display has less effect on the other areas. Furthermore, digitally connected displays, such as those using a DVI or ADC connector, are more consistent because the signal is less vulnerable to interference from surrounding equipment. However, the phosphors do still fade, as will the bulb in the back-light.
- For the hobbyist, profiling once or twice a months should be sufficient.
- For individuals using their system frequently, we recommend profiling once a week.
- For professionals who rely on the accuracy of their display for their livelihood, we recommend profiling daily. However, this may not be necessary with a digitally connected display.