Transcript 幻灯片 1 - Pallas Australia Home Page

Transparent Frame
(Active Bezel)
Seamless LCD
Jan. 2013
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4 TYPES OF VIDEO WALLS
1) DLP – Digital Lighting Process (Back Projection)
2) PDP – Plasma Display Panel (Self-Lighted)
3) LED – Light-Emitting Diode (Self-Lighted)
4) LCD – Liquid Crystal Display (Back-Lighted)
LCD Characteristics
1) LCD is a maturity industry with huge industry chains
2) LCD is the king of display
- Everybody takes LCD, usually takes more than one of them
- Everywhere is spread by LCD, house, office, public building
3) LCD is higher reliability
- It usually falls into outdate before it stops working
4) LCD size is becoming larger and larger
- Today, the largest size of LCD is 120 inches, though it’s hard to be shipped
5) Resolution of LCD is going to be 4,000 (4K)
- A Full HD could be easily made in a size of mobile phone
- In other words, a size of 4 mobile phones will reach 4K resolution
6) LCD is Lower Power Consumption with Long Life
- Power Consumption is about 260 w/m2
- Working Life is over 60,000 hours
A Typical DLP Body
Pixel = 1024 x 768
Bezel = 3 mm
Brightness =
225 ~ 300 cd/m2
Required
Back
Space at
1m
Suitable to
A Dimmer Room
Lower Brightness, Resolution and Life
Higher Maintenance and Larger Space required
650 ~
815 mm
DLP Projector
1.5 mm
Black Frame
Black Frame
Front Screen
650 ~ 815 mm
Central Light
Video Source
Side Structure
Black Bezel of DLP at about 3 mm
1.5 mm
PDP Three-Cells to Trip-Color
Front Glass
General Electrode
Discharge
UV
Fluorescent
Address Electrode
Three Vacuum Cells Displayed as Trip-Color
Vacuum Cells is keeping Discharged
and easily to cause Cell Burned
Real Picture of PDP Vacuum Cell
Pixel Pitch ≈ 1.3 mm
3 Vacuum Cells
Displays as one Pixel
Cell Dimension
is physically limited
to be smaller
- Resolution is lower
Power Consumption
is about 760 w/m2
1.3 mm
PDP Video Wall
Bezel at 3 mm
LED Video Wall
LED Background
Audience
Audience
Ballet Actress
LED Floor
LED Display
LED Display is a Matrix of R,G,B LED
6 ~ 20 mm
P6: 18 m Watching
P20: 60 m Watching
A Nice Watching Distance ≈ LED Pitch x 3,000
Relationship between LED Pitch and Eyes Resolution Ratio
20 mm
If LED Pitch = 20
A nice Watching Distance ≈ 20 x 3,000 mm ≈ 60 meters
≈ 0.02°
Eyes Resolution Ratio ≈ 0.005°
60 m
That’s why we still can detect
the brightness and darkness between LED dots
even over 60 meters away
LED Dots Detected by Long-Focus
And some dots damaged
LED Dots are clearly detected
when a Long-Focus camera
focuses on actors
who are just before the LED screen
Video Wall over 30 Years
DLP (Projector)：Thicker Body，Lower Brightness and Resolution
PDP (Plasma)： Lower Resolution，
Higher Power Consumption and Heat Generation
Why they dominated Video Wall market over 30 years?
The major reason is they have a small Bezel at about 2~3 mm
LED is good for outdoor：Long distance view，wider pitch with lower price
Pitch of LED now reaches 1.9 mm，a precondition of indoor display
Pitch 1.9 ≈ 526 pieces LED per meter，277,000 LED per m2
It’s a really challenge at Unit Price, Power Consumption and Heat Generation
Why Video Wall is not LCD Yesterday
LCD uses Leaser Cutting Tech., a maturity process to build higher resolution
- A mobile can easily reaches Full HD at 2K
- A size of 4 mobiles reaches 4K
Why LCD only came to Video Wall applications in year’s of 2010?
Obstacle is the Black and Dead Bezel which is a nature of LCD
Black and Dead Bezel is a Bar jails LCD for Video Wall applications
Black Bezel over Full HD display likes one tights his belt over his suit
It’s an obstacle for some applications sensitive to Black and Dead Bezel
- Display an import person like TV Station
- Showing data in Central Bank
- Detect dots of carriers on map or radar in control room
LCD Panel Structure
4.6
Dead Bezel
Dead Bezel 15 ~ 25
Dead Bezel
2.7
LED B/L
Active Area
Dead Bezel 15 ~ 25
LED B/L
Liquid Crystal Glass
Civil TV
In Supermarket
Industry
Super Narrow
with
Dead Bezel
LCD Display Result
7
> 30
Civil TV in Supermarket
Civil TV is no way for Video Wall
Industry Super Narrow Frame
DLP and PDP
Is estimable for Narrow Bezels
The Narrower the Bezel, the Higher the Technology
But No Dead Bezel, No Active LCD!
Where is a solution?
Displaying Lost under Super Narrow Frame
What wrong with this picture?
It’s a fault to display everything!
(Face Destroyed, Eyes and Nose are gapped)
Image under Bezel
must be cut / covered
(Displaying Lost)
Whatever narrow of the bezel，video under the bezel must be cut / covered
Picture in picture (PIP) is cut into Four Portions by Black Frame
DLP, PDP or Super Narrow with Dead Bezel
Bar to Display
Transparent vs. Supper Narrow
Display Restoring
4.6
4.6
LED B/L
Transparent
Frame
Active Area
LED B/L
Active Area
Super Narrow
Frame
Dead Bezel
Transparent
Frame
Active Bezel
Seamless
2.7
2.7
Bar to Display
Display Restoring
Transparent Frame (Active Bezel)
Super Narrow Frame
(Dead Bezel)
Transparent Frame
(Active Bezel)
Transparent Frame (Active Bezel) Restores the Display
Cut / Covered by Dead Bezel
PIP on Transparent Frame
Transparent Frame (Active Bezel)
Conclusion
LCD is the King of Display
Every one takes several LCDs and LCD spreads everywhere
LCD for video wall is only about three years
but almost kills Thirty-year’s DLP and PDP
Transparent Frame (Active Bezel) is assisting LCD
to be the King of Video Wall
Thanks