3d display technology tywu. 3d display technology seeing in depth –not only x and y axis, but also...
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3D Display Technology3D 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=rbx3K1xBxVU&feature=related
Polarization Division
• Polarization (Linear) LCD– iZ3D
Polarization Division
• Polarization (Linear) LCD– http://
viml.nchc.org.tw/blog/paper_info.php?CLASS_ID=1&SUB_ID=1&PAPER_ID=145
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
– AdvantageGlasses (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/dlp-
link.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.html#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
Screen
3D Video
Focus Distance
Natural Environment
Focus Distance
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