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Indicators and Display Devices

Classification of Printers

Classification of Printers: Classification of Printers – Character printers and graphic plotters are the two devices used to prepare a permanent (or hard copy) record of computer output. The basic difference between printers and plotters is that the former are de­vices whose purpose is to print letters, numbers and similar characters in text-readable form, while …

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Structure of Liquid Vapour Display (LVD)

Structure of Liquid Vapour Display (LVD): Liquid Vapour Display (LVD) are the latest in economical display technology. They employ a new reflective passive display principle and depend on the presence of ambient lights for their operation. Figure 2.25 gives the structure of a typical LVD cell. It consists of a transparent volatile liquid encased between …

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Structure of Electrophoretic Image Display (EPID)

Structure of Electrophoretic Image Display (EPID): EPID – Electrophoretic Image Display is the movement of charged pigment particles suspended in a liquid under the influence of an electric field. This phenomenon has been utilised in electrophoretic image displays, as shown in Fig. 2.24. The basic principle; fabrication and operating characteristics of a reflective type Electrophoretic …

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Incandescent Display using 16 Segment

Incandescent Display using 16 Segment: Incandescent Display has been a basic process of light generation for several decades. This process is now down in fully integrated electronic displays. Incandescent display using 16 segment as well as 5 x 7 dot matrix formats fabricated using thin film micro electronics are now available for alphanumeric characters. Such …

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7 Segment Display using Gaseous Discharge

7 Segment Display using Gaseous Discharge: Segmented gas discharge display work on the principle of gas discharge glow, similar to the case of Nixie tubes. They are mostly available in 7 segment display or 14 segment form, to display numeric and alphanumeric characters. Since these devices require high voltages, special ICs are developed to drive …

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Gas Discharge Plasma Display

Gas Discharge Plasma Display | Nixie Tubes – Symbolic Representation: Gas Discharge Plasma Display – These are the most well-known type of alphanumeric Plasma Display. Their operation is based on the emission of light in a cold cathode gas filled tube under break­down condition. These cold cathode numerical indicators are called Nixies (Numicators and Numbertrons). …

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What is Liquid Crystal Display (LCD)?

What is Liquid Crystal Display (LCD)?: Liquid Crystal Display (LCD) are passive displays characterized by very low power consumption and good contrast ratio. They have the following characteristics in common. They are light scattering. They can operate in a reflective or transmissive configuration. They do not actively generate light and depend for their operation on …

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What is the use of Light Emitting Diode (LED)?

What is the use of Light Emitting Diode (LED)?: What is the use of Light Emitting Diode (LED)? – The Light Emitting Diodes, Fig. 2.10 (a) is basically a semiconductor PN junction diode capable of emitting electromagnetic radiation under forward conductions. The radiation emitted by LEDs can be either in the visible spectrum or in …

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