US 10,890,987 B2
Stylus and operating method thereof for transmitting electrical signals carrying pressure information
Chin-Fu Chang, Taipei (TW); and Shang-Tai Yeh, Taipei (TW)
Assigned to EGALAX_EMPIA TECHNOLOGY INC., Taipei (TW)
Filed by EGALAX_EMPIA TECHNOLOGY INC., Taipei (TW)
Filed on Nov. 4, 2019, as Appl. No. 16/673,089.
Application 16/673,089 is a continuation in part of application No. 15/184,286, filed on Jun. 16, 2016, granted, now 10,503,318.
Application 15/184,286 is a continuation in part of application No. 15/788,051, filed on Oct. 19, 2017, granted, now 10,606,375.
Application 15/788,051 is a continuation of application No. 14/537,082, filed on Nov. 10, 2014, granted, now 9,851,816.
Claims priority of provisional application 62/180,272, filed on Jun. 16, 2015.
Claims priority of provisional application 62/055,995, filed on Sep. 26, 2014.
Claims priority of provisional application 61/992,340, filed on May 13, 2014.
Claims priority of provisional application 61/945,397, filed on Feb. 27, 2014.
Claims priority of provisional application 61/902,137, filed on Nov. 8, 2013.
Claims priority of application No. 104144644 A (TW), filed on Dec. 31, 2015.
Prior Publication US 2020/0064942 A1, Feb. 27, 2020
Int. Cl. G06F 3/041 (2006.01); G06F 3/0354 (2013.01); G06F 3/044 (2006.01); G06F 3/038 (2013.01)
CPC G06F 3/03545 (2013.01) [G06F 3/0383 (2013.01); G06F 3/044 (2013.01); G06F 3/0416 (2013.01); G06F 2203/04108 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A stylus for transmitting electrical signals carrying pressure information, comprising:
a first component with variable impedance reflecting a pressure, wherein the first component is configured for receiving first signals encoded by a pseudo-random number (PN) code in a first time period;
a second component with fixed impedance, wherein the second component is configured for receiving second signals encoded by the PN code in a second time period; and
a conductive tip section configured for:
receiving the first signals from the first component in the first time period;
receiving the second signals from the second component in the second time period;
transmitting electrical signals which is composed of the first signals in the first time period; and
transmitting electrical signals which is composed of the second signals in the second time period.