Transcript Wavelength Division

3D Display Technology
TYWu
3D Display Technology
• Seeing in Depth
– Not only X and Y axis, but also Z
– Stereoscopic Image
• Technologies
– Eyeglass
– Eyeglassless
Spatial Division
• Head Mounted Displays (HMD)
– http://www.i-glassesstore.com/
Polarization Division
• Polarization
– Linear polarization
Polarization Division
• Polarization LCD
– JVC Passive Xpol system
– Linear polarization
• http://www.youtube.com/watch?v=rbx3K1xBxV
U&feature=related
Polarization Division
• Polarization (Linear) LCD
– iZ3D
Polarization Division
• Polarization (Linear)
LCD
– http://viml.nchc.org.t
w/blog/paper_info.ph
p?CLASS_ID=1&SUB
_ID=1&PAPER_ID=14
5
Polarization Division
• Linear polarization
– Any effort to tilt the head sideways would
result in the polarization failing, ghosting, and
both eyes seeing both images.
– Circular polarization has alleviated this
problem.
Polarization Division
• Polarization
– Circularly
Polarization
• If light is composed of
two plane waves of
equal amplitude by
differing in phase by
90°
Polarization Division
• Polarization
– Circularly
Polarization
Polarization Division
• Polarization
– Circularly
Polarization
Polarization Division
• Polarization LCD
– Images are displayed from top to bottom
with alternative lines assigned to left and
right eyes.
– Resolution Penalty
Polarization Division
• Polarization LCD
– Advantage
•
•
•
•
Full-color display
Flicker-free
Polarizing glasses (passive) are cheap
Youtube
– http://www.youtube.com/watch?v=rZgNpzqIIaw&NR=
1
– http://www.youtube.com/watch?v=Sdv0J57_
U5g
Polarization Division
• Two Projectors
Wavelength Division
• Standard LCD
– Red/Blue method
– Japan’s BS11 satellite channel
• Side-by-Side
– Method adopted by Arisawa
– Line-by-Line
– Advantage
 Glasses (passive) are very cheap
Wavelength Division
• Illustration 1
Wavelength Division
• Illustration 2
– Input: Side by Side
Wavelength Division
• Standard LCD
– Example
• http://www.youtube.com/watch?v=dHG2IWV1caE&
feature=related
Wavelength Division
• Anaglyph techniques
– Color separation technique
– Use two complementary colors to display the
left and right views respectively
– Use red and green (blue) glasses to observe
it
– Adv.: simplicity and economical
Wavelength Division
• Anaglyph Technique
Wavelength Division
• Anaglyph Technique
Wavelength Division
• 如果您沒有紅藍立體眼鏡，歡迎您附回郵
索取。回郵請寄 :
• 台北縣三重市光復路一段88-11號8樓
馬路科技顧問股份有限公司 辛金星先生收
• http://www.iz3d.com.tw/news_into.php?id=
MTc3
Time Division
• 120 Hz LCD
– Glasses are very expensive
– Shutter Glasses (Active Glasses)
Time Division
• 120 Hz LCD/Projector
– Glasses
• NVIDIA "Geoforce" Graphics card +
Projector itself needs to be NVIDIA certified
• The glasses work by communicating with an external USB
controller/IR (Infrared) emitter.
Time Division
• 120 Hz LCD
– 3D Wired Shutter Glasses (Cheap)
– http://www.youtube.com/watch?v=mM9NnN9Cebc
Time Division
• DLP 3D Ready Projector
• http://www.dlp.com/projector/dlp-innovations/dlplink.aspx
Time Division
• 利用DMD (Digital
Micromirror Device)反應
速度高達16~25μs
(40~62.5 KHz)的特性，在
左右視角畫面之間插入
2ms的灰階訊號(Gray
Scale Signals)畫面，快門
式眼鏡內建Sensor偵側畫
面灰階訊號藉以切換左右
眼
• DLP-Link 優點：(1)無需
同步訊號發射器； (2)投影
機端無附加硬體成本，業
者導入速度快
Autostereoscopic Display
(Eyeglassless)
• Without Glasses
– Philips 42" 3DWOW
Eyeglassless
• Parallax Barrier
• Lenticular Lenslets
Eyeglassless
• Techniques
– http://www.mrl.nyu.edu/~perlin/demos/autostereo.htm
l#autoshutter
Troubles
• 人眼雖對焦在3D銀幕上，但凝視不同距離
的3D影像內容，兩眼內聚夾角會改變，違
反對焦與內聚同步改變的自然現象。
– 經訓練能適應這種不自然的觀看環境，但跟2D
影像相比，兩眼內聚夾角如隨3D內容不斷改變，
容易使控制眼球的肌肉疲勞。
• 立體視覺就像色盲一樣，不是人人都能感
受得到，約有百分之四人沒有立體視覺，
一成五的人立體視覺異常，這些人都不適
合觀看3D影像。
Troubles
• Illustration
Focus Distance
Focus Distance
Screen
Natural Environment
3D Video
Tools
• Stphmkre
– http://stereo.jpn.org/eng/stphmkr/
– File/Open Left/Right Images…
– File/Open Stereo Image…
• Stereo/ColorAnaglyph
• Etc.
Tools
• Image (side by side)
Tools
• Result
Tools
• 3D Maker
– Filter/3D Glasses
– File/Open Picture
– Set X and Y Offsets
– Mark the area by mouse
– Convert
Tools
• Illustration
Tools
• 3D Video Player
– Stereoscopic Player
– http://www.iz3d.com.tw/support_1.php
References
• http://www.iz3d.com.tw/
• http://viml.nchc.org.tw/blog/paper_info.php?CLASS_ID=1&SUB_ID=
1&PAPER_ID=145
• http://www.nvidia.com/object/product_GeForce_3D_VisionBundle_u
s.html
• http://viml.nchc.org.tw/blog/paper_info.php?CLASS_ID=1&SUB_ID=
1&PAPER_ID=142
• http://andrew.csie.ncyu.edu.tw/pdf3/050504.pdf
• http://www.fpd.edu.tw/entry/content!newsView.htm?id=302
• http://www.taifook.com/data/taiwan/pdf/2010031654022_02_new.pdf
• http://www.3d-forums.com/autostereoscopic-displays-t1.html