Development of Flat type fluorescent lamp for LCD Backlighting system

Transistor Considerations for LCD Backlighting

LCD Back l ight ing has generated widespread interest from many diverse disciplines within the engineering industry. This has no doubt been fueled by the t rend to portabi l i ty and particularly to the enormous growth of the computing market. Products such as notebook, laptop, and palmtop personal computers , portable te levisions, viewcams, point of sale terminals, automotive dashboards, avio...

Electrical feedback control for driving mercury-free flat fluorescent lamp

Joung-Hu Park Jong-Bok Baek Bo-Hyung Cho Abstract — Recently, a mercury-free flat fluorescent lamp has been developed for LCD backlight application, utilizing a glow-discharge mode instead of a discharge contraction. This paper proposes a lamp-driving system with a feedback loop which prevents discharge contraction and stabilizes the operation of the lamp ignition and radiation. By measuring th...

Fluorescent Lamp Modelling for Voltage Fluctuations

Low-Frequency Square-Wave Drive for Large Screen LCD-TV Backlighting Systems

This paper presents a low-frequency square-wave drive, consisting of a single high voltage converter, an ac lamp ignition circuit, current control devices and a single backlight controller, capable of driving an arbitrary number of parallel cold cathode fluorescent lamps (CCFLs) with independent accurate lamp current regulation. Key to the architecture is a proposed capacitive coupling approach...

Under Carnap's Lamp: Flat Pre-semantics

“Flat pre-semantics” lets each parameter of truth (etc.) be considered separately and equally, and without worrying about grammatical complications. This allows one to become a little clearer on a variety of philosophical-logical points, such as the usefulness of Carnapian tolerance and the deep relativity of truth. A more definite result of thinking in terms of flat pre-semantics lies in the a...