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Views of a liquid-crystal display, both with electroluminescent backlight switched on (top) and switched off (bottom). A backlight is a form of illumination used in liquid-crystal displays (LCDs) that provides illumination from the back or side of a display panel.
Once the switch happens, green changes to red. This feature allows the presenter to be aware of the upcoming transition, and, for example, change their posture. In addition to the tally lights, an additional light called ISO is sometimes used. ISO is the abbreviation for isolated, and it indicates that the video signal is being recorded separately.
To identify the switch or switch position by means of which a normal run (e.g. of tape) is started in the indicated direction. Pause U+23F8 ⏸ #5111B Pause; Interruption: To identify the control or the indicator which stops operation intermittently and keeps the equipment in operating mode. Play/pause toggle U+23EF ⏯ —
This is because even in the "off" state, black pixels still allow some light from the backlight through. Some LED-backlit LCDs use local dimming zones to increase contrast between bright and dim areas of the display, but this can result in a "blooming" or "halo" effect on dark pixels in or adjacent to an illuminated zone. [3]
A UK illuminated rocker switch in the off position. Illuminated switches incorporate a small neon lamp or LED, allowing the user easily to locate the switch in the dark. Household illuminated switches were introduced in the mid-1950s. [4]
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Power On (IEC 60417-5007) and Power Off (IEC 60417-5008) symbols are used to indicate positions of the rocker switch Power button marked with Standby symbol (IEC 60417-5009) turns the device on or off without fully disconnecting power supply. A power symbol is a symbol indicating that a control activates or deactivates a particular device.
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