Displays Flashcards
True or false: The gpu handles communication between the monitor and the CPU
Yee
CRTs were dangerous. Why?
They had toxic materials inside
True or false: Light travels horizontally and vertically at 90 degree angles only
False. Light travels in waves at all kinds of angles.
True or false: Many waves of light create the image of white
True
True or false: Singular waves of light create an image of a specific colour
True. The colour depends on the wavelength.
What do liquid crystals do when charged
They straighten out and block light that is vertical
What happens when no elec is applied to Liquid crystals?
They allow light to pass through horizontally
How do liquid crystals work
They bend light and control how much light escapes through the polarizing filter after it, deciding the brightness of the light that gets through.
What is the order in which light goes from the backlight to the RGB filter
Backlight > Polar Horizontal (Allows Horizontal) > LC > Polar Horizontal (Allows vertical) > RGB filter
True or false: The B>P>LC>P>CF nonsense takes place within a single sub-pixel?
True
What is the difference between a pixel and a sub-pixel
A pixel is three combined subpixels with colour filters of RGB.
What are 2 benefits and drawbacks of TN?
Pros
Cheap
Fast response times
Cons
Bad colour
Bad viewing angle
What are 2 benefits and cons of IPS
Pros
Good colour
Good viewing angles
Cons
Expensive
Slower response times
What are 2 pros and cons of va panels
Pros
Good contrast ratio
Good midground between tn and ips
Cons
Black smudging
Shit response times
What does an inverter do?
Converts DC power to AC for legacy monitors
What is edge backlighting?
When backlights are around the edge of the monitor. This can lead to the middle of the screen looking dark.
What does CCFL mean
Cold cathode florescent lamp
What is 640x 480
VGA mode
What is PPI
Pixels per inch - Tells of the screen’s overall clarity by taking resolution and size of the screen into account.
What is a good and bad PPI number?
70 or less is bad
100-110 is good
What is monitor brightness measured in?
Nits
What is the standard range of nits for monitors?
100-1000. 300 avg.
What is Oled?
A technology that uses an organic compound that, when, charged, lights up. This means no backlight is needed.
Which technology claims to have “true blacks”
OLED
Name five display connectors
VGA DVI HDMI Displayport Thunderbolt
What connectors has thunderbolt been known to use?
Minidisplay port, usb-c
How can you tell if a port is thunderbolt compatible?
A small lightning bolt will be next to it.
What are the three types of DVI connection
A,D,I
A monitor’s image is shifted slightly to the left. What tool can be used to fix this?
Physical screen adjustment using the monitor’s built in menu
What is the measurement of light used with projectors?
Lumens
What is the suggested lumen rating for a large room
10,000 lumens
What is throw distance
The max distance the projector can be to the projection surface.
Is an ultra-short throw distance implying the projector needs to be closer for farther away from the projection surface?
Closer
What is the lumen suggestion for a small, dark room.
1000-1500
What is the most popular type of projector lamp
Metal halide
What are three characteristics of metal halide
Bright
Small form factor
3000h
What are three characteristics of LED projector lamps
Less cooling needed, RGB, 20K hour usage
What are three characteristics of Laser lamps
Bright
Colourful
30,000h
A display is glitchy and looks like a mess, but works fine in VGA mode. What is likely the issue?
Drivers
