US 11,995,250 B2
Active stylus and capacitive position detection system having touch object detecting mode and stylus detecting mode
Viktor Kremin, Lviv (UA); Andriy Ryshtun, Lviv (UA); and David G. Wright, Woodinville, WA (US)
Assigned to Wacom Co., Ltd., Saitama (JP)
Filed by Wacom Co., Ltd., Saitama (JP)
Filed on Jul. 25, 2022, as Appl. No. 17/872,861.
Application 17/872,861 is a continuation of application No. 17/164,676, filed on Feb. 1, 2021, granted, now 11,397,477.
Application 17/164,676 is a continuation of application No. 16/712,909, filed on Dec. 12, 2019, granted, now 10,908,710, issued on Feb. 2, 2021.
Application 16/712,909 is a continuation of application No. 15/896,950, filed on Feb. 14, 2018, granted, now 10,521,027, issued on Dec. 31, 2019.
Application 15/896,950 is a continuation of application No. 15/866,033, filed on Jan. 9, 2018, granted, now 10,261,605, issued on Apr. 16, 2019.
Application 15/866,033 is a continuation of application No. 14/979,090, filed on Dec. 22, 2015, granted, now 9,904,378, issued on Feb. 27, 2018.
Application 14/979,090 is a continuation of application No. 14/095,930, filed on Dec. 3, 2013, granted, now 9,218,073, issued on Dec. 22, 2015.
Application 14/095,930 is a continuation of application No. 13/431,425, filed on Mar. 27, 2012, granted, now 8,878,823, issued on Nov. 4, 2014.
Claims priority of provisional application 61/512,324, filed on Jul. 27, 2011.
Prior Publication US 2022/0365613 A1, Nov. 17, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G06F 3/0354 (2013.01); G06F 3/038 (2013.01); G06F 3/041 (2006.01); G06F 3/044 (2006.01); G06F 3/033 (2013.01)
CPC G06F 3/03545 (2013.01) [G06F 3/0383 (2013.01); G06F 3/0414 (2013.01); G06F 3/04186 (2019.05); G06F 3/044 (2013.01); G06F 3/0442 (2019.05); G06F 3/0446 (2019.05); G06F 3/033 (2013.01); G06F 3/041 (2013.01); G06F 2203/04104 (2013.01); G06F 2203/04105 (2013.01); G06F 2203/04106 (2013.01); G06F 2203/04107 (2013.01); G06F 2203/04114 (2019.05)] 12 Claims
OG exemplary drawing
 
1. A stylus detecting system, comprising:
a sense array including first lines and second lines crossing the first lines;
a detector-side antenna; and
a touch controller connected to the sense array and configured to:
(i) in a touch object detecting mode, drive the first lines as transmission (TX) lines with a finger sensing TX signal and measure reception (RX) signals on the second lines as RX lines, and
(ii) in a stylus detecting mode, measure a stylus TX signal transmitted by a stylus, on both the first lines and the second lines, wherein, in the stylus detecting mode, the touch controller transmits synchronization or timing data wirelessly from the detector-side antenna to a stylus-side antenna inside the stylus, using magnetic coupling between the detector-side antenna and the stylus-side antenna, to cause the stylus to transmit the stylus TX signal.