Fluorescent Lamp LCDs require a warm-up period
Summary
Liquid crystal display (LCD) panels that use fluorescent lamps require a warm-up period to reach normal brightness.
Products Affected
Apple Studio Displays, Apple Cinema Displays, iBook, MacBook Pro, MacBook, PowerBook, iMac
Many Apple products use fluorescent lamps to illuminate the display, including:
- Some MacBook Pro computers
- MacBook (All Models)
- Some PowerBook computers
- iBook computers
- Some iMac computers
- Apple Cinema Displays
- Apple Studio Displays
These products use fluorescent lamp backlighting and reflective techniques to produce a bright image.
When you first turn on the computer, or wake it from a lengthy sleep, its brightness gradually increases until it reaches a normal operating temperature. This warm-up period can range from several minutes to over an hour, depending on display's size and the environment in which it is being used.
Additional information
For more information on flat panel LCD technology, see "PowerBook Displays: Active vs. Passive Matrix Comparison."