The LEDs in touch panel operate at IR frequencies, so that the light is ___________ to a user.

Related MCQs

• LEDs operate on __________ frequencies.
• In flat panel display the emissive displays are devices that converts electric energy into_____________.
• In liquid crystal display the flat panel device is referred to as a _____________LCD.
• The sampling frequencies often used in multimedia are _____________.
• A CRT monitor displays color picture by using a combination of phosphor that emits light of __________ color
• The__________________ emits a small spot of light at each position contacted by the electron beam.
• The simplest model for a light emitter is _______________.
• The scattered light is called as____________.
• Spotlights are used to control the amount of light emitted within a cone with apex at ______________ source position.
• The emissive displays are devices that convert __________ energy to light