glossary

PCN stands for Product Change Notification See also: FAQ: Product Update and Change Notifications Editor

PLED stands for Polymer Light Emitting Diode. PLEDs are also called P-OLEDs. Crystalfontz briefly carrier some PLED displays, however the poor shelf lifetime of these displays (1-2 years)led us to discontinue the displays. Many of the PLED modules we offered have drop in OLED or LCD replacements. Get in touch with our support team for

PMOLED is Passive Matrix OLED — Passive Matrix Organic Light Emitting Diode. Passive Matrix refers to the arrangement of the driving electrodes in the OLED display. In PMOLED displays, there is an array of horizontal conductors and an array of vertical conductors, with the OLED material between them. A pixel is formed where the vertical

PUN stands for Product Update Notification See also: FAQ: Product Update and Change Notifications Editor

PWM stands for Pulse Width Modulation. Pulse width modulation describes a method of sending a signal as a pulse in order to drive analog components at varying power levels. By changing the width of the pulse, a smaller amount of power is delivered each period. Pulse width modulation is used to control the brightness of

R5G6B5 or 565: A method of storing a full-color pixel in a single 16-bit word of memory. For each pixel, the red and blue channels can take on 32 levels, encoded as 5 bits each. The green channel can take on any of 64 levels, encoded as 6 bits. Theoretical color depth is 216 or

RAM stands for Random Access Memory. This is memory that may be written to some value, then later read. RAM is the normal memory in a computer system. RAM only holds data when the RAM is powered. If power is interrupted, the data stored in the RAM is lost. Editor

A reflective LCD depends on having sufficient ambient light to reflect in order to be read. A reflective LCD does not have a backlight and does not make any light on its own.   A reflective LCD can be seen well in any lighting situation where you could read text on a paper, they are

The RGB interface transfers image data using a separate parallel line for each bit of color information. For larger color depths, more lines have to be independently controlled. Each line represents a 2x multiplier on potential colors that can be described. Monochrome displays have just 1-bit color and pixels are either “on” or “off”. A

ROM stands for Read Only Memory. This is memory that is factory pre-programmed to hold some data. ROM is data that can be read, but cannot be written or changed. Editor

SPI stands for Serial Peripheral Interface. SPI is a simple serial bus that is often used by LCD or OLED controllers. SPI as implemented for OLED and LCD controllers typically uses a “3-wire SPI” or “4-wire SPI” scheme. Detailed Definition SPI was originally championed by Motorola (now Freescale). In its original “pure” form SPI uses