patent citation analysis of e-paper industry
DESCRIPTION
Outline The E-Book Industry E-Paper Technology Literature Methods Results ConclusionTRANSCRIPT
THE EMERGING FIRMS IN THE EMERGING FIELD: PATENT CITATION ANALYSIS OF E-PAPER INDUSTRY
Patent Citation Analysis of E-Paper Industry
Show-Ling Jang, Yun-Chen Yu, Tzu-Ya Wang
Outline The E-Book Industry E-Paper Technology Literature Methods Results Conclusion
The E-Book Industry First introduced by Sony Kindle’s success Brands: Amazon, Sony, Netronix (振耀 ),
Samsung, Fujitsu, 翰林 , NOOK
The E-Book Industry
Technologies of E-Paper EPD (Electrophoretic Display)Charged particles/powdersAdopted by E Ink, SiPix and Bridgestone
Technologies of E-Paper Ch-LCD Cholesteric liquid Adopted by Kent Display
Literature Cassiman and Veugelers (2006) Hadgedoorn and Duysters (2002) Freeman (1977, 1979)
Data and Methods Sample Period: 1994-2008 USPTO issued patents Emerging Firms: E Ink, SiPix, Kent
Display and Bridgestone Knowledge Diffusers: Copytele, Xerox
and Eastman Kodak
Data and Methods Finding Knowledge Diffusers1. Citing Frequency: (Criterion: >10)2. Finding e-paper-related Patent
(Criterion: 38 UPC Classes) Building up the citation network Calculating Network Indicators
Data and Methods Degree Centrality (Direct Linkages)
Betweenness Centrality (Role as Transmitter)
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Results Emerging Stage (1994)
Results Emerging Stage (1999)
Results Developing Stage (2004)
Results Commercialization Stage (2008)
Results Degree Centrality
0
5
10
15
20
25
30
35
40
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008年
%
Bridgestone Copytel E Ink Eastaman Kodak Kent Displays SiPix Xerox
Results Betweenness Centrality
0
10
20
30
40
50
60
1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008年
%
Bridgestone Copytel E Ink Eastman Kodak Kent Displays SiPix Xerox
Conclusions Emerging Firms Knowledge Diffusers ACTIVENESS in learning is essential!