Title:
COVER GLASS FOR PEN INPUT DEVICE AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2015/072297
Kind Code:
A1
Abstract:
A cover glass for a pen input device, said cover glass being characterized in that: the haze value is less than 1%; the Martens hardness is in the range of 2,000 N/mm2 to 4,000 N/mm2; when a moving member incurring a load of 150 gf (1.47 N) is moved in one direction with a speed of 10 mm/sec on the surface of the cover glass at room temperature, the coefficient of dynamic friction (μk) is 0.14 - 0.50 in a region where the relationship between the dynamic friction force (Fk) (N) and time is approximated by a straight line, and the standard deviation (σ) (N) of the dynamic friction force (Fk) (N) is 0.03 or less; and the moving member is a pen having a polyacetal resin pen tip with a Rockwell hardness of M90, with the pen tip having a radius of curvature of 700 μm.
Inventors:
SUGIMOTO NAOKI (JP)
SHIBUYA TAKASHI (JP)
HANASHIMA KEISUKE (JP)
HOMMA OSAMU (JP)
SUZUKI KATSUMI (JP)
NAKAMURA KIYOHISA (JP)
TAKESHITA NOBUHIKO (JP)
SHIBUYA TAKASHI (JP)
HANASHIMA KEISUKE (JP)
HOMMA OSAMU (JP)
SUZUKI KATSUMI (JP)
NAKAMURA KIYOHISA (JP)
TAKESHITA NOBUHIKO (JP)
Application Number:
PCT/JP2014/078038
Publication Date:
May 21, 2015
Filing Date:
October 22, 2014
Export Citation:
Assignee:
ASAHI GLASS CO LTD (JP)
International Classes:
G06F3/041; C03C3/083; C03C3/085; C03C3/087; C03C3/091; C03C3/093; C03C15/00; C03C17/30; C03C21/00
Domestic Patent References:
| WO2013015039A1 | 2013-01-31 | |||
| WO2012160894A1 | 2012-11-29 |
Foreign References:
| JP2013077135A | 2013-04-25 | |||
| JP2011510904A | 2011-04-07 | |||
| JP2014080332A | 2014-05-08 |
Attorney, Agent or Firm:
ITOH, Tadashige et al. (JP)
Tadashige Ito (JP)
Tadashige Ito (JP)
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