1. 1 FPD / ADO Lab Yi-Ching Huang 2009 Paper Review 31.3: Reduction and Measurement of 3D Moiré Caused by Lenticular Sheet and Backlight Shin-ichi Uehara, Tsutomu Hiroya, Kouji Shigemura, and Hideki Asada Electric-field-driven LC lens for 3-D/2-D autostereoscopic display HyungKi Hongm, SungMin Jung, ByungJu Lee, HyunHo Shin Speaker: Yi-Ching Huang 黃怡菁 Advisors: Prof. Han-Ping D. Shieh( 謝漢萍教授 ) Prof. Yi-Pai Huang( 黃乙白教授 ) Prof. Yi-Pai Huang( 黃乙白教授 ) Dept. of Photonics & Display Institute National Chiao Tung University 交通大學 Hsinchu, Taiwan e-mail: mosseyes.H@gmail.com August 17, 2009

2. 2 FPD / ADO Lab Yi-Ching Huang Outline  Introduction -- Cylindrical lens arrays for 3D display  Reduction and Measurement of 3D Moiré caused by Lenticular Sheet and Backlight -- Reduction methods -- Measurement methods -- Summary  Electric-field-driven LC lens for 3D/2D autostereoscopic display -- Introduction -- Design of ELC lens -- Experiment results -- Summary  Conclusions

3. 3 FPD / ADO Lab Yi-Ching Huang Outline  Introduction -- Cylindrical lens arrays for 3D display  Reduction and Measurement of 3D Moiré caused by Lenticular Sheet and Backlight -- Reduction methods -- Measurement methods -- Summary  Electric-field-driven LC lens for 3D/2D autostereoscopic display -- Introduction -- Design of ELC lens -- Experiment results -- Summary  Conclusions

4. 4 FPD / ADO Lab Yi-Ching Huang Introduction Binocular Parallax Auto-Stereoscopic (without glasses) Parallax Barrier Lens Arrays

5. 5 FPD / ADO Lab Yi-Ching Huang Introduction Lens Arrays  Low Resolution  Narrow viewing angle RLRLRL Parallax Barrier  Low Brightness  Low Resolution RLRLRL Issue: Moiré effect

6. 6 FPD / ADO Lab Yi-Ching Huang Introduction -- Moiré Issue: Moiré effect Factors of 3D Moiré : Lens Arrays + period 1period 2 Moiré

7. 7 FPD / ADO Lab Yi-Ching Huang Outline  Introduction -- Cylindrical lens arrays for 3D display  Reduction and Measurement of 3D Moiré caused by Lenticular Sheet and Backlight -- Reduction methods -- Measurement methods -- Summary  Electric-field-driven LC lens for 3D/2D autostereoscopic display -- Introduction -- Design of ELC lens -- Experiment results -- Summary  Conclusions

8. 8 FPD / ADO Lab Yi-Ching Huang Reduction methods Moiré effect has been improved! Before Prism sheet (Backlight) Non-uniform light distribution After

9. 9 FPD / ADO Lab Yi-Ching Huang Measurement method and Result HDDP (Horizontally Double-Density Pixels) Moiré effect has been improved! Measurement method: Measurement result: 2.7’ 3D LCD : 3D crosstalk = 0.8%

10. 10 FPD / ADO Lab Yi-Ching Huang Summary 3D Moiré caused by lenticular sheet and backlight can be reduced. Before After Measurement method of 3D Moiré had been proposed. Issue: Low Brightness

11. 11 FPD / ADO Lab Yi-Ching Huang Outline  Introduction -- Cylindrical lens arrays for 3D display  Reduction and Measurement of 3D Moiré caused by Lenticular Sheet and Backlight -- Reduction methods -- Measurement methods -- Summary  Electric-field-driven LC lens for 3D/2D autostereoscopic display -- Introduction -- Design of ELC lens -- Experiment results -- Summary  Conclusion

12. 12 FPD / ADO Lab Yi-Ching Huang Introduction Lens Arrays 2 view Lenticular lens:ELC lens: 2D3D ELC lens achieve 2D/3D switching

13. 13 FPD / ADO Lab Yi-Ching Huang Design

14. 14 FPD / ADO Lab Yi-Ching Huang Experiment V 1 =3.5V V 1 =4V 15’ 2D/3D LCD V2:V2: V2:V2: Crosstalk ~ 20%

15. 15 FPD / ADO Lab Yi-Ching Huang Summary A new structure of Electric-field-driven LC lens (ELC lens) has been proposed. Issue: Long response time Double layer ELC lens glass LC layer electrode d/2

16. 16 FPD / ADO Lab Yi-Ching Huang Outline  Introduction -- Cylindrical lens arrays for 3D display  Reduction and Measurement of 3D Moiré caused by Lenticular Sheet and Backlight -- Reduction methods -- Measurement methods -- Summary  Electric-field-driven LC lens for 3D/2D autostereoscopic display -- Introduction -- Design of ELC lens -- Experiment results -- Summary  Conclusions

17. 17 FPD / ADO Lab Yi-Ching Huang Conclusions Reduction and measurement methods of 3D Moiré had been proposed. A new structure of Electric-field-driven LC lens (ELC lens) has been proposed. Before After Issue: Low Brightness Issue: Long response time

18. 18 FPD / ADO Lab Yi-Ching Huang Thank you for your kind attention! Display Institute, National Chiao Tung University http://www.di.nctu.edu.tw/en/index.htm

19. 19 FPD / ADO Lab Yi-Ching Huang + Period aPeriod b Period p θ

20. 20 FPD / ADO Lab Yi-Ching Huang Specification

21. 21 FPD / ADO Lab Yi-Ching Huang Design W 1 :W 2 =80:10W 1 :W 2 =160:10

22. 22 FPD / ADO Lab Yi-Ching Huang = E = distance between viewing zones P lens = lens pitch i = sub-pixel pitch D = cell gap of ELC lens

23. 23 FPD / ADO Lab Yi-Ching Huang One layer LC lens Double layer LC lens glass LC layer electrode d/2