Display Technologies Flashcards
What is Pixel short for?
Picture Element.
What does LCD mean?
Liquid Crystal Display
What is RGB?
RGB refer to the red, green, blue colours that make up a pixel.
The mix of which can be assigned an RGB value
What is CCFL?
Cold Cathode Flourescent Lamp. An old technology used to back light displays.
What is LED?
Light-Emitting Diode. A technology used to backlight a display.
What is TN?
Twisted Nematic, is a lower cost display panel type.
What is IPS?
In-Plane Switching, a type of display panel.
What is resolution of a monitor?
Resolution is the number of pixels horrizontal and vertical.
What is Nt?
Nit, a measure of the light emitted from a display.
What is the measurement of light emitted from a display panel?
Nt, Nit.
What is response time of monitor?
How long it takes a pixel to go from black to white and back to black, however some monitors rate themselves grey to white to grey.
Is measured in Miliseconds, ms and is replacing refresh rate, normal range 1-4ms.
What is OLED?
Organic Light-Emitting Diode. Each colour is a signle bulb.
Produces thinner monitors and has the ability to be flexible.
What is DLP?
Digital Light Processing. Using a grid of mirrors shine a light through a colour wheel to create an image, more common in projectors than monitors.
What are the main parts of and LCD monitor?
Screen panel,
Backlight unit,
Inverter if CCFL,
Connectors:
Inputs from data,
Power connection.
What is the job of the back panel or backlight unit?
To evenly distribute light across the whole of the panel.
Why do CCFL have inverters?
As they are powered in AC unlike LED’s
What is a GPU?
Graphic Processing Unit, aka Video card. Provide visual output.
What is Frame buffering?
Frame buffing is old technology that used on board RAM to track each pixel of a screen.
Who manufacturers GPUs?
Nvidia and AMD, historically ATI.
Intel their own onboard.
What is an Integrated GPU?
Intels GPU that is built into the CPU.
Also called an APU by AMD
What is an APU?
Accelerated Processing Unit by AMD. GPU built into the CPU.
What is VGA?
Video Graphic Array. 15 pins spread across 3 rows, blue normally. Uses anolog signal.
What is DVI?
Digital Visual Interface. Connector and signal that replaced VGA.
What is DVI-I?
Digitial Video Interface - Intergrated. Backward compatible DVI with VGA adapter to turn digital signals anolog.
What is DVI-D
Digital Video Interface - Digital, DVI that is just digital.
What port is this?
DVI-I
What port is this?
DVI-D
What difference are there in Single and Dual-link DVI types?
Single link has a gap of collums in the connector.
Dual-link has the abillity to run dual monitors but also large high res monitors.
What is DRM?
Digital Rights Management. Protection of poroduction media so it cannot be stolen.
What is HDMI.
High Definition Multimedia Interface. Does sound, vision and DRM.
Avilable in mini-HDMI.
What is DP?
Display port. Also avilable in mini.
An alternative/competitor of HDMI
What slot do GPU’s use on a motherboard?
PCIe x16, with next lane down for multiple GPU’s
What needs to be done if a system has multiple GPU’s?
Define the primary card in the system setup.
What is the Native Resolution?
The resolution that a monitor was designed to preform best at.
Most projectors use which 2 technologies for colour?
DLP, Digital Light Processing
and LCD, Liquid Crystal Display.
What technologies do projectors use for light?
Bulb and LED.
What is Lumens?
The rated brightness of a bulb which must match the projectors requirements.
What is a projectors “throw”.
The distance the projector can display an image at.
Projectors require geometric adjustments to display correctly,
What adjustment is this shape refered to as?
Pincushion.
Projectors require geometric adjustments to display correctly,
What adjustment is this shape refered to as?
Keystone.
Projectors require geometric adjustments to display correctly,
What adjustment is this shape refered to as?
Skew.
Troubleshooting (display technologies):
Overheat shutdown.
GPU overheating, check fans, check airflow.
Troubleshooting (display technologies):
Dead pixels.
Replace the LCD monitor.
What is display artifact?
Display artifacts is where old display data is still present and seen with new display data.
Troubleshooting (display technologies):
Artifacts
Vram could be going bad, test with a different GPU and replace.
Troubleshooting (display technologies):
Incorrect colours patterns.
Check cables, reseat or replace and VRAM, replace GPU.
Troubleshooting (display technologies):
Dim image.
Check brightness level. Backlight failing, replace monitor.
Troubleshooting (display technologies):
Flickering image.
Check cable, replace.
Troubleshooting (display technologies):
Distorted image, monitor.
Check resoltuion, set to the native.
Troubleshooting (display technologies):
Distorted image, Projector.
Adjust geometry.
What is “burn in” and what technology does it affect?
Burn in is an artifact of a stationary image affecting Plasma monitors.
Troubleshooting (display technologies):
Burn in.
Allow power off for some time,
Display a constant changing image/video,
Replace monitor.
Troubleshooting (display technologies):
Persistant image.
Allow power off for some time,
Display a constant changing image/video,
Replace monitor.
