Patents by Inventor Shih-Chin Chang

Shih-Chin Chang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 10514403
    Abstract: A circuit and method of measuring capacitance are disclosed. The capacitance measuring circuit includes an integrator circuit, a first control circuit, a second control circuit and a processor circuit. The capacitance measuring method includes steps of: using a current source and a charging/discharging time to generate a first charge amount related to a second charge amount of a capacitor to be detected; generating a third charge amount and generating a fourth charge amount according to the first charge amount and the third charge amount; generating a fifth charge amount and generating a remaining charge amount according to the fifth charge amount and fourth charge amount; using an integrator to convert the remaining charge amount into a first voltage and generating a judging result according to whether the first voltage meets a second voltage; and calculating the judging result to obtain a capacitance variation of the capacitor to be detected.
    Type: Grant
    Filed: December 4, 2017
    Date of Patent: December 24, 2019
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yu Kuang, Tsung-Yi Su, Shih-Chin Chang
  • Publication number: 20180156853
    Abstract: A circuit and method of measuring capacitance are disclosed. The capacitance measuring circuit includes an integrator circuit, a first control circuit, a second control circuit and a processor circuit. The capacitance measuring method includes steps of: using a current source and a charging/discharging time to generate a first charge amount related to a second charge amount of a capacitor to be detected; generating a third charge amount and generating a fourth charge amount according to the first charge amount and the third charge amount; generating a fifth charge amount and generating a remaining charge amount according to the fifth charge amount and fourth charge amount; using an integrator to convert the remaining charge amount into a first voltage and generating a judging result according to whether the first voltage meets a second voltage; and calculating the judging result to obtain a capacitance variation of the capacitor to be detected.
    Type: Application
    Filed: December 4, 2017
    Publication date: June 7, 2018
    Inventors: Yu Kuang, Tsung-Yi Su, Shih-Chin Chang
  • Publication number: 20130087278
    Abstract: The using of carbon nanotubes to produce a thin film or buckypaper, hereafter referred to as carbon nanotube membrane, which is soaked with epoxy resin or a carbon nanotube-epoxy resin composite adhesive, and then placed between the joining edges of components, where after an electric current is passed through to heat up the carbon nanotube membrane. This leads to the curing temperature of the epoxy resin or carbon nanotube-epoxy resin composite adhesive, thereby hardening the epoxy resin or carbon nanotube-epoxy resin composite adhesive to achieve bonding. This invention utilizes simple equipment, and the method of an electric current passing through for heating, which can rapidly and uniformly heat the epoxy resin or carbon nanotube-epoxy resin composite adhesive, resulting in hardening and bonding. This method is not affected by the environment, and greatly reduces the time and resources required to harden the epoxy resin, and achieves a stronger effect additionally.
    Type: Application
    Filed: January 6, 2012
    Publication date: April 11, 2013
    Inventors: Shih-Chin Chang, Chia-Chi Hsieh
  • Publication number: 20130087277
    Abstract: A method for bonding conductive materials by using composite adhesive made of carbon nanotubes and epoxy resin. Firstly, this composite adhesive is placed between the joining surfaces of the two conductive plates; thereafter an electric current enters from one conductive plate and passes through this composite adhesive, to the other conductive plate. As the electric current passes through the carbon nanotubes, Joule heating results in the overall temperature of the carbon nanotubes-epoxy composite adhesive increasing, leading to speedily joining and patching of the composite adhesive. This method reduces the electrical resistance of the adhesive material by providing a large area and shortening the path of the electric current, also, improving the homogeneity of the temperature of the adhesive and avoiding the positive feedback effect. The simple equipment of this method is not affected by the environment, and effectively reduces the resources and time needed to harden the epoxy resin.
    Type: Application
    Filed: January 6, 2012
    Publication date: April 11, 2013
    Inventors: Shih-Chin Chang, Ping-Cheng Sung
  • Publication number: 20130087941
    Abstract: A kind of production method for carbon nanotube sponges which can control different hole sizes and densities, having uniform cell sizes. The formed carbon nanotube sponge has a soft, flexible and multi-holed structure. The carbon nanotubes pass through a hydrophilic acid process, mixing with different ratios of polymer materials PVA and are dispersed in the solvent. This mixed liquid is frozen under different controlled solidifying rates, forming different sized solid ice crystals having controllable particle sizes, and is vacuumized in the next step, which removes the frozen solvent through low pressure sublimation, the remains being the multi-holed carbon nanotube sponge structure. The size of the cells of the carbon nanotube sponge structure can be controlled through the freezing rate and the addition of polymers. The strength and stiffness can be controlled through the density of the carbon nanotubes and the addition of polymers.
    Type: Application
    Filed: January 5, 2012
    Publication date: April 11, 2013
    Inventors: Shih-Chin Chang, Ping-Cheng Sung
  • Publication number: 20120111497
    Abstract: The present invention discloses a complex epoxy resin adhesive added with carbon nanotubes, and the complex epoxy resin adhesive can be prepared in advance and then stored at room temperature. When use, the preheating step is no longer required anymore, and the complex epoxy resin adhesive mixed with carbon nanotubes is coated uniformly onto an adhering position, and microwave is used for heating and curing the adhesive, so as to achieve the dual effects of surpassing the enhanced curing property of a simple epoxy resin and reducing the curing time.
    Type: Application
    Filed: December 4, 2010
    Publication date: May 10, 2012
    Applicant: National Tsing Hua University
    Inventors: Shih-Chin Chang, Tsun-Hsu Chang, Tzu-Huan Chiu, Tsung-Han Chen
  • Publication number: 20120075219
    Abstract: A detection method for detecting a plurality of contacts on a touch panel includes: generating a preliminary sensing data according to the contacts on the touch panel; determining a plurality of first specific sensing axes included in a plurality of first sensing axes and a plurality of f second specific sensing axes included in a plurality of second sensing axes according to the preliminary sensing data; utilizing a configuration circuit to configure a driving and receiving sequence of the plurality of first sensing axes and the plurality of second sensing axes for obtaining a first sensing data and a second sensing data; and utilizing a determining circuit to receive a completion instruction, wherein when the determining circuit receives the completion instruction, the determining circuit determines a touch detection result according to the first sensing data and the second sensing data.
    Type: Application
    Filed: September 22, 2011
    Publication date: March 29, 2012
    Inventors: Tung-Ke Wu, Shih-Tzung Chou, Shih-Chin Chang
  • Publication number: 20120038574
    Abstract: A detection method for detecting a touch event on a touch panel includes a plurality of first sensing axes on a first dimension, and a plurality of second sensing axes on a second dimension. The detection method includes: regarding each first sensing axis, choosing another first sensing not neighboring with the first sensing axis as a first reference axis, and utilizing the first sensing axis and the first reference axis to derive a first sensing data corresponding to the first sensing axis; utilizing the second axes to derive a second sensing data corresponding to each second sensing axis; and utilizing first sensing data respectively corresponding to the first sensing axes and second sensing data respectively corresponding to the second sensing axes to derive a touch event detection result.
    Type: Application
    Filed: August 11, 2011
    Publication date: February 16, 2012
    Inventors: Shih-Chin Chang, Shih-Tzung Chou, Tung-Ke Wu
  • Patent number: 5822409
    Abstract: An incoming message automatic reporting system installed in the telephone line of a fax machine to automatically notify the addressee after the sender has sent a fax message to the fax machine, the system including a microprocessor, a multi-frequency decoder, a multi-frequency signal generator, a voice IC, a telephone line interface, and three electric connectors, wherein when the sender inputs the code number of a sub-telephone set, the code number is simultaneously stored in the microprocessor, when the sender's fax message is completely received by the addressee's fax machine, the microprocessor picks up the stored code number to dial the sub-telephone set of the addressee, and drives the voice IC to send a voice message to the addressee when the addressee picks up the handset of the sub-telephone set, informing the addressee of the incoming of a fax message.
    Type: Grant
    Filed: December 9, 1996
    Date of Patent: October 13, 1998
    Assignee: Advanced Scientific Corp.
    Inventors: Joseph Chang, Shih-Chin Chang, James Lee
  • Patent number: 5743519
    Abstract: A U-turn high capacity sheet feeder including: a sheet storing tray for holding a stack of sheets of paper, having a stack advancing spring for advancing a stack of sheets of paper; a transfer roll; a feed roll and a drive mechanism controlled to separate an individual sheet of paper from the sheet storing tray to the transfer roll for allowing it to be further driven by the transfer roll to a host machine; a U-turn baffle channel for guiding an individual sheet of paper moving away from the sheet storing tray to the transfer roll; a pivotable baffle channel for guiding an individual sheet of paper from the U-turn baffle channel to the host machine and for supporting the individual sheet of paper against the feed roll of the host machine; a control mechanism for determining the timings of the engagement of the feed roll and the drive mechanism for transporting individual sheets of paper one by one into the feed zone of the host machine in conjunction with feeding cycle of the host machine; and a housing, whic
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: April 28, 1998
    Inventors: Joseph Chang, Shih-Chin Chang, Joe-Te Hsiung, C. Y. Chang
  • Patent number: 5523821
    Abstract: A mobile copy machine extension unit including a casing having a paper tray for holding blank sheets of paper, a front cover and a back cover mounted on the casing and spaced by a loading space for letting a mobile copy machine to be loaded between the front and back cover, a reversible motor, sheet-transfer rollers turned by the reversible motor through a set of gears to carry individual blank sheets of paper into the mobile copy machine through a paper inlet on the front cover, an idle wheel turned by the reversible motor through a belt transmission to carry copied sheets of paper out of the mobile copy machine to a paper deck on the casing through a paper outlet on the back cover.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: June 4, 1996
    Assignee: Advanced Scientific Corp.
    Inventors: Joseph Chang, Shih-Chin Chang, C. Y. Chang
  • Patent number: 5505442
    Abstract: An electronic apparatus is disclosed for receiving and distributing confidential papers. This apparatus comprises: (a) a motor, which is connected to a plurality of gears, a plurality of transmission belts, and a plurality of correlated rollers, for transferring printed papers from a printer output to one of a plurality of closed-type paper bins via an arched paper guiding plate; (b) means for providing a computer signal to control the selection of the closed-type paper bin for sending the printed papers; (c) a main lock control system provided for locking and unlocking the closed-type paper bins in their entirety; (d) a plurality of independent lock control modules, each of the independent lock control modules being provided for everyone of the closable paper bins; (e) lock opening means provided with the independent lock control modules which allows a user to lock and unlock one of the closed-type paper bins by entering a set of computer-set codes.
    Type: Grant
    Filed: May 26, 1994
    Date of Patent: April 9, 1996
    Inventors: Joseph Chang, Jenner Chang, Shih-Chin Chang
  • Patent number: 5161602
    Abstract: A technique of preparing graphite molds for growing single crystals of active metals and alloys. The inner surfaces of the graphite molds in contact with the growing up single crystals are of passive graphite. Various types of single crystal selectors are available in the graphite molds.
    Type: Grant
    Filed: July 22, 1991
    Date of Patent: November 10, 1992
    Assignee: National Science Council
    Inventors: Shih-Chin Chang, Tsing-Shien Sheu