LED Anatomy, Structure of LED | Working of LED

LED Screen Works

An LED display is a flat panel display, which uses an array of light-emitting diodes as pixels for a video display. LED displays are capable of providing general illumination in addition to a visual display, as when used for stage lighting or other decorative (as opposed to informational) purposes. But mainly we don’t focus on “working of led”, I mean how it works?

The first true all-LED flat panel television screen was possibly developed, demonstrated and documented by James P. Mitchell in 1977.

In my Article I will give some details about Overall TWO Type of LED display, in later I will make another article to describe Full LED.

They are :

• AMOLED
• QLED

In this article I will write about AMOLED Display, just keep your eyes on our next publication for nexy(QLED)

AMOLED (Active-Matrix Organic Light-Emitting Diode) is a display technology used in smartwatches, mobile devices, laptops, and televisions. OLED describes a specific type of thin-film-display technology in which organic compounds form the electroluminescent material, and active matrix refers to the technology behind the addressing of pixels.

Design Anatomy:

An AMOLED display consists of an active matrix of OLED pixels generating light (luminescence) upon electrical activation that have been deposited or integrated onto a thin-film transistor (TFT) array, which functions as a series of switches to control the current flowing to each individual pixel.

Typically, this continuous current flow is controlled by at least two TFTs at each pixel (to trigger the luminescence), with one TFT to start and stop the charging of a storage capacitor and the second to provide a voltage source at the level needed to create a constant current to the pixel, thereby eliminating the need for the very high currents required for passive-matrix OLED operation.

TFT backplane technology is crucial in the fabrication of AMOLED displays. In AMOLED, the two primary TFT backplane technologies, polycrystalline silicon (poly-Si) and amorphous silicon (a-Si), are currently used offering the potential for directly fabricating the active-matrix backplanes at low temperatures (below 150 °C) onto flexible plastic substrates for producing flexible AMOLED displays.

In the market, there are approx 7 types of display available :