petition - reverent petition to a deity orison, prayer prayer wheel - a cylinder with prayers written on it; each revolution counts as uttering the prayers; used especially by Buddhists in Tibet
Laptop inverter boards (also know as LCD inverter, FL inverter, screen inverter, backlight inverter) come in different shapes and sizes. On the picture above you see some typical looking inverter boards found in laptop computers. The inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. The inverter board converts low voltage DC power (few volts) supplied by the motherboard to high voltage AC power (few hundred volts) needed for the backlight lamp. When the inverter board works properly, the backlight lamp gets power and the LCD screen lights up. As a result, the image on the screen is bright.
A particle board is a kind of manufactured wood product that is ideal for countertops because it is stable, lightweight and inexpensive. The board is reasonably friendly to the environment since it is manufactured from recycled wood and wood scraps that are shredded. A type of resin is use as binding material. Particle boards are actually denser than hardwoods and are less expensive, but it is not as strong or moisture-resistant.