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The Dell XPS 15 Touch Screen laptop (9530, using Haswell) was first released in October 2013, and is a high-end notebook. It was the fourth generation XPS 15, which has taken many of the design elements of the Ivy Bridge Edition XPS 15 but fixes the cooling/throttling, adds a Haswell CPU and an updated GeForce GT 750M, no optical drive, and a ...
A touchscreen (or touch screen) is a type of display that can detect touch input from a user. It consists of both an input device (a touch panel) and an output device (a visual display). The touch panel is typically layered on the top of the electronic visual display of a device.
This in turn controls a high-voltage (1.3 kV) DC-AC inverter or a matrix of LEDs. The method to control the intensity of LED is to pulse them with PWM which can be source of harmonic flicker. [citation needed] The bare display panel will only accept a digital video signal at the resolution determined by the panel pixel matrix designed at ...
XPS requires high vacuum (residual gas pressure p ~ 10 −6 Pa) or ultra-high vacuum (p < 10 −7 Pa) conditions, although a current area of development is ambient-pressure XPS, in which samples are analyzed at pressures of a few tens of millibar. When laboratory X-ray sources are used, XPS easily detects all elements except hydrogen and helium.