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Types of monitors
2
Types of Monitors
Tomáš Denemark, Marek Honzírek, Michal Jex, Matěj Laitl
Timeline
CRT
LCD
Plasma
OLED
Advantages
Operating principle
OLED examples
Phospor lay-outs
Operating principle
Types of LCD
Metal Cathode
Electron Transport Layer
triades
stripes
Organic Emitters
- Slim
- Accurate color reproduction
- Deep, true blacks (contrast
ratio up to 1:2 000 000)
- Wide viewing angles; no image
degradation at high angles
- Nonexistent motion blur
Hole Transport Layer
1) Electron guns
2) Electron beams
3) Focusing coil
4) Deflecting coil
5) Anode
6) Shadow mask
7) Phospor layer
8) Close-up
- Protective glass
- Display electrodes (covered
by MgO protective layer)
- Xenon & neon gas cells,
phosphor-coated from inside
- Address electrodes (covered
by protective layer)
- Rear glass
- Passive Twisted Nematic Display (TNLCD)
- Super Twisted Nematic LCD (STNLCD)
- Thin Film Transistor LCD (TFT LCD)
- Rear Projection LCD
Indium Tin Oxide Layer
- Light travels through the spacing
of the molecular arrangement
- Light bends 90 degrees as it follows
the twist of the molecules
- Molecules rearrange themselves
vertically along with the electric field
- No twisting thoughout the movement
- Polarized light cannot pass through
the lower analyzer
Glass Substrate
Drawbacks
Advantages
Drawbacks
- Energy efficiency
- Produce little heat
- Sharpness
- Brightness
- Thin and light-weight
- Demise
- Large and heavy monitors
- Health concerns
- Implosions
- Security
- Native-supported resolution for best display effect
- High response time
- Limited viewing angles
- Lower contrast ratio
- Dead pixels
- Poor black
- Screen burn-in, image retention
(older models affected more)
- Gradual decline of brightness
(modern panels last 60 000 hours)
- Large-area flicker
- Unavailability of panels smaller than 32"
- Reflection glare
- Heavier than LCD (glass screen)
- High altitude operation difficulties
1960s
1990s
1970s
1920s