Patents Assigned to Raydium Semiconductor Corporation
  • Patent number: 9395825
    Abstract: A touch input device includes a body and a sensing module. The body has an external surface which encloses an accommodation space. The sensing module is disposed in the accommodation space and includes a sensing unit and a signal operation unit. The sensing unit generates a sensing signal. The signal operation unit generates a surface result signal according to the sensing signal to adjust a surface character of the external surface.
    Type: Grant
    Filed: July 31, 2014
    Date of Patent: July 19, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chia-Hsiu Lin, Te-Chang Lin, Ya-Ling Lu, Yi-Ming Chen, Wei-Yuan Cheng
  • Patent number: 9373275
    Abstract: A level shifter applied in a driving circuit of a display is disclosed. The level shifter includes a first stage of level shifting unit and a second stage of level shifting unit and used to convert an input voltage signal with low voltage level into an output voltage signal with high voltage level. In one example, the total number of the transistors needed by the level shifter is much fewer than that of the prior art, and additional voltage sources are not needed to provide middle voltages. The manufacturing cost of the exemplary level shifter can be reduced and the signal level shifting efficiency of multi-power domain can be enhanced.
    Type: Grant
    Filed: October 1, 2014
    Date of Patent: June 21, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventors: Kai-Lan Chuang, Chen-Yu Wang, Chien-Ru Chen
  • Patent number: 9349339
    Abstract: A source driver pre-charging apparatus including a data detection module, a determining module, and a pre-charging module is disclosed. The data detection module captures a first most significant bit having N bits in a current data and a second most significant bit having N bits in a former data and compares them to generate a compared result. N is a positive integer larger than or equal to 2. The determining module judges whether any data is transited from a first grey-level region to a second grey-level region between the former data and the current data and at least one other grey-level region is existed between the first grey-level region and the second grey-level region. If the judgment result of the determining module is yes, the pre-charging module performs a pre-charging action on an output voltage of a source driver.
    Type: Grant
    Filed: August 26, 2014
    Date of Patent: May 24, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventors: Kai-Lan Chuang, Chien-Ru Chen
  • Patent number: 9305499
    Abstract: A driving apparatus applied in a liquid crystal display is disclosed. The driving apparatus at least includes a first latch, a second latch, an output buffer, and a slew rate enhancing module. The first latch is used to store a second data signal. The second latch is used to store a first data signal. The first data signal is previous to the second data signal. The slew rate enhancing module is used to compare the first data signal and the second data signal to generate a compared result, and correspondingly output a control signal to the output buffer according to the compared result to control a driving current of the output buffer.
    Type: Grant
    Filed: April 29, 2013
    Date of Patent: April 5, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventor: Chih Chuan Huang
  • Patent number: 9299315
    Abstract: A source driving circuit is disclosed. The source driving circuit includes a first integrated source driver and a second integrated source driver. The first integrated source driver includes a first receiving unit, a timing controller, a first source-driving-unit and a first transmission unit. The first receiving unit receives an original image data through a displayport (DP) interface, and decodes the original image data to a first display data and a second display data. The timing controller transmits a first control signal and a second signal. The first source-driving-unit receives the first control signal and the first display data. The first transmission unit receives the second display data, and the second integrated source driver receives the second control signal and the second display data, so as to elevate the compatibility between the source driver and the DP interface.
    Type: Grant
    Filed: August 5, 2013
    Date of Patent: March 29, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventors: Ying-Lieh Chen, Wen-Tsung Lin, Li-Ping Lin
  • Patent number: 9287838
    Abstract: A high slew rate operational amplifier including an input terminal, an output terminal, and at least one slew-rate enhancing circuit is disclosed. Each slew-rate enhancing circuit includes a first stage enhancing unit and a second stage enhancing unit. The first stage enhancing unit is coupled between the input terminal and the output terminal. The first stage enhancing unit and the second stage enhancing unit are coupled. The slew-rate enhancing circuit has a threshold voltage and the threshold voltage is related to the size of the first stage enhancing unit. When the threshold voltage is driven, the slew-rate enhancing circuit will rapidly start the second stage enhancing unit to perform a slew rate compensation on the high slew rate operational amplifier.
    Type: Grant
    Filed: July 11, 2014
    Date of Patent: March 15, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventor: Po-Cheng Lin
  • Patent number: 9282611
    Abstract: A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes a power, at least one LED string, a LED control unit, and an input voltage detection circuit. At least one LED string is coupled to the power and includes LEDs connected in series. The input voltage detection circuit is coupled to two ends of at least one LED of the LEDs respectively and used to judge whether an input voltage is lower than a LED conducting voltage. The input voltage detection circuit includes a charging capacitance to be charged when the at least one LED string is conducted. If the judged result of the input voltage detection circuit is yes, the input voltage detection circuit will control the charging capacitance having a charging voltage to discharge to the at least one LED string.
    Type: Grant
    Filed: November 20, 2013
    Date of Patent: March 8, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chih-Wei Chu, Yu-En Lee, Shu-Kuang Chou
  • Patent number: 9281815
    Abstract: An electrode unit on a touch-sensing element includes a first electrode and a second electrode. The first electrode includes a first conductive element; and a plurality of second conductive elements extending from the first conductive element in directions in parallel with a first direction within a specific range. The second electrode includes a third conductive element and a plurality of fourth conductive elements extending from the third conductive element in directions in parallel with a second direction within a specific range.
    Type: Grant
    Filed: January 21, 2013
    Date of Patent: March 8, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventor: Sheng-Fu Wang
  • Patent number: 9281819
    Abstract: A resistor renormalization method for a source driving circuit is provided, wherein the source driving circuit includes a plurality of resistors coupled in series, and the resistors respectively have a resistance and correspond to a number section value. The resistor renormalization method includes the steps of: (A) adding the resistances of the resistors to generate a total resistance; (B) providing a radix, wherein the radix is a natural number; (C) dividing the total resistance by the radix to generate a calculated section value; (D) dividing the resistances of the resistors by the radix to generate a plurality of remainders, respectively, and adding the remainders to generate an accumulated remainder; and (E) setting the number section value and the resistance of each resistor according to a relation between the calculated section value and the number section value and a relation between the remainder of each resistor and the radix.
    Type: Grant
    Filed: April 17, 2015
    Date of Patent: March 8, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventors: Kuan-Hung Chou, Yu-Chun Tsai
  • Patent number: 9237615
    Abstract: An electromagnetic touch-control screen structure, comprising: a display panel; a touch-control plate over the display panel; an electromagnetic induction plate over the touch-control plate; and a cover lens attached on the electromagnetic induction plate. The electromagnetic touch-control screen of the disclosure, by deploying reasonable structure and manufacturing technique, stacks an electromagnetic induction plate with a touch-control plate, a cover lens and a display panel. Compared with existing manufacturing techniques, it can reduce one time of lamination operation, and dramatically decrease the thickness and weight of the electromagnetic structure, so that it can meet the need of lightness and thinness, for touch-control display equipments, like cellphone.
    Type: Grant
    Filed: January 31, 2014
    Date of Patent: January 12, 2016
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yung-Hsiang Yang, Chung-Tai Cheng
  • Patent number: 9196217
    Abstract: The present invention discloses a timing controller including a driving signal generation module, a time-locking module, and a first logic circuit. The driving signal generation module generates a first isolation signal. The time-locking module detects whether or not all of a plurality of source driving units of a source driver lock a timing signal. The first logic circuit generates a second isolation signal, and adjusts the second isolation signal according to the output status of the first isolation signal. The gate driver selectively outputs a plurality of gate driving signals to a plurality of gate driving units of the gate driver according to the output status of the second isolation signal.
    Type: Grant
    Filed: February 9, 2013
    Date of Patent: November 24, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventor: Ying-Lieh Chen
  • Patent number: 9197229
    Abstract: A ring oscillator clock automatic synchronization method of a panel driving circuit includes steps of: when a vertical blanking interval happens, a master driver generates a pulse signal to slave drivers respectively. A pulse width of the pulse signal equals to N times of a master ring oscillator clock, wherein N is larger than 0. When a slave driver receives the pulse signal, the slave driver uses its slave ring oscillator clock to count the pulse width of the pulse signal to obtain that the pulse width of the pulse signal equals to M times of the slave ring oscillator clock, wherein M is larger than 0. The slave driver compares M with N and automatically adjusts the slave ring oscillator clock according to the comparison result to make it achieve synchronization with the master ring oscillator clock.
    Type: Grant
    Filed: September 23, 2014
    Date of Patent: November 24, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventors: Feng-Li Lin, Hung Li
  • Patent number: 9197204
    Abstract: A driving circuit includes at least one output end, at least one driving voltage module, and at least one signal module. The output end receives and outputs an analog voltage. The at least one driving voltage module is connected with the at least one output end and generates a driving voltage, wherein the driving voltage module determines a voltage value of an output voltage according to a relation between an analog voltage and the driving voltage and transmits the output voltage to the at least one output end. The at least one signal module is connected with the at least one output end and outputs an analog data according to the analog voltage, wherein the at least one driving voltage module stores a residual voltage of the at least one signal module when the at least one signal module converts the analog voltage and the analog voltage is larger than the driving voltage.
    Type: Grant
    Filed: January 14, 2013
    Date of Patent: November 24, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventor: Cheng-Chin Liu
  • Patent number: 9116188
    Abstract: A capacitance evaluation circuit includes a capacitive voltage divider, an analog-to-digital converter (ADC) and a processing module. The capacitive voltage divider includes a switch circuit, a known capacitor and a capacitor under test. The switch circuit is controlled by first and second clock signals. A voltage variation at a first terminal of the known capacitor is coupled to a first terminal of the capacitor under test based on a conduction state of the switch circuit. The ADC converts a voltage on the first terminal of the capacitor under test into a digital signal. The processing module detects a capacitance and a capacitance variation of the capacitor under test according to the digital signal from the ADC and a parameter of the ADC.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: August 25, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventor: Yu Kuang
  • Patent number: 9091714
    Abstract: A capacitance measurement circuit includes an operation amplifier; a reference capacitor having a first terminal coupled to a first input terminal of the operation amplifier and a second terminal selectively coupled to a first or second reference voltage; a sensor capacitor having a first terminal coupled to a second input terminal of the operation amplifier and a second terminal selectively coupled to the first or second reference voltage; an approximation unit having an output terminal and an input terminal coupled to an output terminal of the operation amplifier; a conversion unit having an output terminal and an input terminal coupled to the output terminal of the approximation unit; and a coupling capacitor having a first terminal coupled to the first or second input terminal of the operation amplifier and a second terminal coupled to the output terminal of the conversion unit.
    Type: Grant
    Filed: November 20, 2012
    Date of Patent: July 28, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventors: Shih-Tzung Chou, Yong-Nien Rao, Yu Kuang
  • Patent number: 9094031
    Abstract: A driving circuit includes channels, a positive converting unit, a negative converting unit, an input switch, and an operational amplifier. A first digital data and a second digital data are alternatively transmitted in a first channel and a second channel. The positive converting unit and negative converting unit are respectively disposed in first channel and second channel and convert first digital data and second digital data into a positive analog data and a negative analog data. A first input terminal and a second input terminal of operational amplifier are respectively in first channel and second channel. After input switch respectively transmits positive analog data and negative analog data to first input terminal and second input terminal or to second input terminal and first input terminal, positive analog data and negative analog data are transmitted in a channel of the channels corresponding to entering operational amplifier.
    Type: Grant
    Filed: July 1, 2014
    Date of Patent: July 28, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yu-Lung Lo, Kuan-Hung Chou, Chien-Ming Chen
  • Patent number: 9066390
    Abstract: A LED driving apparatus having a holding current circuit and an operating method thereof are disclosed. The holding current circuit includes an input terminal, a holding resistor, a regulator, a first resistor, a second resistor, a setup resistor, a control unit, and a transistor. The holding resistor and the regulator, the first resistor and the second resistor, and the transistor and the setup resistor are coupled between the input terminal and ground terminal respectively. The control unit is coupled to the transistor, between the holding resistor and the regulator, and between the first resistor and the second resistor respectively. The control unit receives a first voltage between the holding resistor and the regulator and a second voltage between the first resistor and the second resistor and outputs a control signal to selectively control the transistor off.
    Type: Grant
    Filed: October 14, 2013
    Date of Patent: June 23, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chung-Tai Cheng, Chia-Hsiu Lin
  • Patent number: 9063606
    Abstract: The present invention discloses a control device for a touch panel that comprises a plurality of X-directional sensing lines and Y-directional sensing lines. The X-directional sensing lines and Y-directional sensing lines are arranged in an interlaced manner. The control device comprises a clock generation circuit, a selection module, a driving signal generation circuit, a differential detection module, and a digital-to-analog conversion module. The selection module selects a first sensing line and a second sensing line from the X-directional sensing lines or Y-directional sensing lines. The driving signal generation circuit generates first and second driving signals to the first and second sensing lines, respectively. The digital to analog conversion module selectively outputs a first voltage to the first sensing line or outputs a second voltage to the second sensing line. The operation frequency of the touch panel can be increased using the control device of the present invention.
    Type: Grant
    Filed: December 28, 2011
    Date of Patent: June 23, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yu Kuang, Yong Nien Rao, Shih Tzung Chou, Tsung Lin Wu
  • Patent number: 9046971
    Abstract: A detection method for detecting a plurality of contacts on a touch panel which includes a plurality of first sensing axes on a first dimension and a plurality of second sensing axes on a second dimension includes: generating a preliminary sensing data according to the contacts on the touch panel; determining at least one specific sensing axis included in the plurality of first 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 sensing output; and utilizing a determining circuit to receive a completion instruction.
    Type: Grant
    Filed: October 26, 2011
    Date of Patent: June 2, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventors: Hsu-Ming Chuang, Shih-Tzung Chou
  • Patent number: 9041703
    Abstract: A source driver applied in a liquid crystal display is disclosed. The source driver at least includes a first pair of channels, a second pair of channels, two P-type digital/analog converting modules, two N-type digital/analog converting modules, two multiplexers, two polarization multiplexers, and four amplifying and buffer modules. The first pair of channels includes a first channel and a second channel which are adjacent, and the second pair of channels includes a third channel and a four channel which are adjacent. The two P-type digital/analog converting modules correspond to a first set of gamma values, and the two N-type digital/analog converting modules correspond to a second set of gamma values. The first pair of channels shares the two P-type digital/analog converting modules and the second pair of channels shares the two N-type digital/analog converting modules to save the used chip area.
    Type: Grant
    Filed: March 11, 2013
    Date of Patent: May 26, 2015
    Assignee: Raydium Semiconductor Corporation
    Inventor: Yu-Jen Yen