display presentation
Transcript: Sam B, Blake, Philip, Brendan Displays Devices What is a display? What is a display? 1 2 3 A device that produces light output from the digital or analog information passed to is by a PC to create an image Displays require their own power source Displays receive data from the PC via a multi-wire cable these connections are often simple, keyed, and color coded 4 Display Types Display Types Analog: Large old bulky TV's Technical term--CRT These use continuous signals (think waves) that vary over time to produce images... Very similar to how sound is sent log distance Digital: Most modern displays LCD LED OLED Plasma Projector These use on/off switching to produce images these displays use exact measurements to produce color and light Having Multiple Displays You can set up a PC in a way that provides the user with multiple monitors these monitors are usually linked together to create a very large Image AMD calls this idea "Eyefinity" Nvidia calls it "Nvidia Surround" Multiple Displays Displays Types There are many ways that light is displayed onto screens. Display Types CRT CRT This is a large and bulky display type called the Cathode Ray Tube. It is a vacuum tube with electron guns and phosphorescent screens to display images. LCD LCD An LCD (Liquid Crystal Display) is a display type for smaller computers. It allows for thinner and sharper displays. They have to have a back-light source and use electrical charges to make the liquid crystals align themselves to pass or block lights. LED Light Emitting Diodes are electronic components that produce light when currents run through in proper directions. They can be combined in large amounts to make massive displays like ones in sport arenas. LED OLED The Organic LED uses organic material to produce light, getting rid of the required back light. OLED More types More types - Plasma uses small cells of charged ionized gas. - Projectors use mirrors or prisms to beam light through lenses to increase size. Modern projectors use Digital Light Processing. Display Connectors 1 2 3 Display Connectors VGA - 3 Rows of 5 pins (DB-15) and usually blue HDMI-3 connectors- Standard, Mini, Micro 4 Display Port-Frowny Face Connector, Like HDMI but one side chamfered, comes in Standard or Mini DP DVI-Digital-Comes in single and dual. Missing 4 pins DVI-Integrated-Full Connector, Digital or Analog, Dual or Single DVI-Analog-Missing Pins Features of a display Properties of a display resolution the number of pixel on a given display first number corresponds to number of columns second number corresponds to number of rows common resolutions: 1920x1080 1600X900 1366x768 resolution Title Native resolution the resoultion that conforms exactly to the number of pixels on the screen A 1920x1080 capable screen has the ability to down scale and appear as a 1600 x 900 display but this would not be it's native resolution Response Time Response Time Response time is a measure of how quickly a pixel can display a change from either black to white or from one shade of gray to another. Lower response time is usually better. Normal response time right now is 1ms for TN panels and 4ms for IPS and VA panels. Refresh Rate Refresh rate the number of times per second the LCD monitor and alter the same pixel represents How many times per second the picture is sent to the monitor common rates are: 60 Hz 120 Hz 240 Hz Brightness Brightness A Display control on the monitor allows you to make the monitor brighter or darker usually represented by a sun icon. In the image to the right, is an example of what a monitor controls icon including how the brightness control looks. Contrast Ratio Contrast Ratio Contrast ratio: the number of shades a monitor can produce between it's brightest white and darkest black Pixel Pitch Pixel Pitch The distance from center of the pixel to the center of another pixel. Pixel pitch typically ranges from .9mm up to 10 if this is too large, it appears as if veiwed through a screen door Filters Filters Privacy: A light altering device that prevents the images from from being seen from most angles, typically used on laptops for public transit etc. Anti-glare: Prevents outside light from hitting the screen and bouncing back (glare)