An IC and related circuitry which encodes and decodes complex waveforms, such as music and voice. Such waveforms can be stored directly, but would take up many times as much storage as waveforms compr [..]

LCD displays do not emit light (are not emissive), so they require external light, either from ambient sources (e.g., sunlight) or a backlight behind the LCD. The light from the backlight passes throu [..]

Lighting using a special florescent light bulb. Advantages: white light easily obtainable, can be very bright. Disadvantages: complex drive circuitry, limited life (roughly 5,000 hours), limited cold- [..]

Equipment tested to comply with applicable CE requirements (directives). The specific applicable directives depend on a variety of factors, such as voltages used in the equipment (i.e., high-voltage e [..]

Canadian Standards Association, a test and certification organization.

A touch screen consisting of an array of transparent conductors on top or embedded near the top of a piece of plastic or glass, along with electronics to sense the capacitance between adjacent conduct [..]

The manner in which the display contrast is controlled. Most terminals allow manual control, where the software allows the operator to adjust the contrast while viewing the display. Better terminals a [..]

The ratio between the lightest element on a screen and the darkest. Higher contrast ratios generally make a display easier to read.

The most common serial interfaces. EIA-232 is single-ended, ±12V, for two devices. EIA-422 is differential, 0-5V, for two devices. EIA-485 is differential, 0-5V, for up to 32 devices. COM ports on PCs [..]

A light source consisting of phosphors between flexible layers, excited by a high-voltage, high frequency power source. Almost any color can be created by using different phosphors. Advantages: provid [..]