Patents Assigned to Raydium Semiconductor Corporation
  • LED DRIVING APPARATUS HAVING HOLDING CURRENT CIRCUIT AND OPERATING METHOD THEREOF
    Publication number: 20140111107
    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: Application
    Filed: October 14, 2013
    Publication date: April 24, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Chung-Tai Cheng, Chia-Hsiu Lin
  • DRIVING CIRCUIT
    Publication number: 20140104257
    Abstract: A driving circuit for connecting a display module is provided. The driving circuit includes a polarity control module, an output control module, and a detecting module. The polarity control module provides a polarity control signal. The output control module is connected with the polarity control module and provides a plurality of output control signals. The detecting module is coupled with the polarity control module and the output control module, wherein the detecting module detects the polarity control signal and selectively controls the output control module to operate in at least one of a first control mode and a second control mode to control the output control signals.
    Type: Application
    Filed: October 11, 2013
    Publication date: April 17, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Chih-Chuan Huang, Chien-Ming Chen
  • Optical touch apparatus with noise suppressing function and method of operating the same
    Patent number: 8698780
    Abstract: An optical touch apparatus is disclosed. The optical touch apparatus comprises a light emitting module, a noise suppressing module, a light sensing module, and a processing module. The light emitting module emits at least one sensing beam, and the at least one sensing beam comprises a plurality of sensing rays. If an emitting angle of a specific sensing ray among the plurality of sensing rays toward a light sensor of the light sensing module is larger than a default value, the noise suppressing module will block the specific sensing ray from emitting into the light sensor. After the light sensing module generates a sensing result according to the condition of the light sensing module receiving the at least one sensing beam, the processing module will determine the position of a touch point according to the sensing result.
    Type: Grant
    Filed: June 10, 2010
    Date of Patent: April 15, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Meng-Shin Yen, William Wang, Chung-Cheng Chou
  • Optical touch apparatus and operating method thereof
    Patent number: 8692803
    Abstract: An optical touch apparatus includes a light source emitting module, an optical module, a light sensing module, and a processing module. The optical module and the light sensing module are set on a first side and a second side of a surface of the optical touch apparatus. The light source emitting module sequentially emits a first light source and a second light source. A plurality of scanning lights of the second light source is uniformly distributed above the surface. The optical module receives the first light source and uniformly emits a plurality of lights. The light sensing module generates a first sensing result and a second sensing result based on the conditions of receiving the lights and scanning lights respectively. The processing module determines at least one touch point location corresponding to at least one object on the surface based on the first sensing result and the second sensing result.
    Type: Grant
    Filed: March 8, 2010
    Date of Patent: April 8, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Meng-Shin Yen, William Wang, Chung-Cheng Chou
  • LCD driving apparatus and method
    Patent number: 8692824
    Abstract: The invention discloses a driving apparatus for driving an LCD. The driving apparatus comprises a voltage control unit, an operating unit, a resistance unit, and a voltage selection unit. The operating unit comprises two sets of buffers formed by a plurality of operational amplifiers in negative feedback circuit. The two sets of buffers selectively receive positive polarity voltages and negative polarity voltages respectively. The voltage selection unit is provided with the positive polarity voltages and negative polarity voltages through the operating unit and the resistance unit. The voltage selection unit selectively provides the pixels of the LCD with the positive polarity voltage and the negative polarity voltage. Accordingly, each of the pixels is provided either with the positive polarity voltages or the negative polarity voltages by one of the two sets of buffers.
    Type: Grant
    Filed: October 30, 2008
    Date of Patent: April 8, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yong-Nien Rao, Yu-Lung Lo, Chih-Yu Lee
  • ORTHOGONAL CODE MATRIX GENERATION METHOD AND RELATED CIRCUIT THEREOF
    Publication number: 20140095569
    Abstract: An orthogonal code matrix generation method includes: establishing an N×N orthogonal code matrix, wherein an inner product of every two rows of the orthogonal code matrix is 0, and each column of the orthogonal code matrix has a summation of elements equal to a same value, wherein N is a power of 4; and using the N×N orthogonal code matrix as a basic unit to establish a target orthogonal code matrix. An orthogonal code matrix generation circuit includes: an N×N orthogonal code matrix generator, arranged for establishing an N×N orthogonal code matrix, wherein an inner product of every two rows of the orthogonal code matrix is 0, each column of the orthogonal code matrix has a summation of elements equal to a same value; and a target orthogonal code matrix generator, arranged for using the N×N orthogonal code matrix as a basic unit to establish a target orthogonal code matrix.
    Type: Application
    Filed: January 3, 2013
    Publication date: April 3, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Shih-Lun Huang, Kai-Ming Liu
  • Touch input electronic device
    Patent number: 8686970
    Abstract: An touch input electronic device includes: a touch input device; a clock generation circuit, generating a first clock and a second clock; a touch sensing circuit, coupled to the touch input device, the touch sensing circuit operated under the first clock; a logic circuit, receiving a sensing output signal from the touch sensing circuit, the logic circuit operated under the second clock; and a conversion circuit, outputting an output voltage under control of the logic circuit, the output voltage coupled to the touch sensing circuit, the conversion circuit operated under the second clock. In response to the sensing output signal from the touch sensing circuit, the logic circuit controls the conversion circuit to adjust the output voltage to detect a capacitance variance of the touch input device.
    Type: Grant
    Filed: February 24, 2011
    Date of Patent: April 1, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yu Kuang, Shih-Tzung Chou
  • LED DRIVING APPARATUS AND OPERATING METHOD THEREOF
    Publication number: 20140077712
    Abstract: A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes a controller and an output stage. The output stage includes at least one LED, a switch, and a setup resistor. The at least one LED, the switch, and the setting resistor are coupled in series between an input voltage and ground. The controller is coupled to the input voltage and the switch respectively. The controller receives at least one voltage sensing signal and outputs a setup voltage signal to the output stage. The at least one voltage sensing signal is received from the node between the at least one LED and the switch, between two LEDs, or between two voltage dividing resistors coupled in series between the input voltage and ground.
    Type: Application
    Filed: September 18, 2013
    Publication date: March 20, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Chung-Tai Cheng, Chia-Hsiu Lin
  • LED DRIVING APPARATUS AND OPERATING METHOD THEREOF
    Publication number: 20140070705
    Abstract: A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes an output stage, a reference voltage regulator, a first input resistor, a second input resistor, and a controller. The output stage includes at least one LED. The reference voltage regulator is coupled to an input voltage and used to receive the input voltage and output a reference voltage signal. One end of the first input resistor is coupled to a node. One end of the second input resistor is coupled to the node, and the other end of the second input resistor is coupled to ground. The controller receives the reference voltage signal from the reference voltage regulator and receives a divided voltage signal from the node respectively, and outputs a setting voltage signal to the output stage.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 13, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Chung-Tai Cheng, Chia-Hsiu Lin
  • LED DRIVING APPARATUS AND OPERATING METHOD THEREOF
    Publication number: 20140070722
    Abstract: A LED driving apparatus and an operating method thereof are disclosed. The LED driving apparatus includes an output stage, an input resistor, a plurality of voltage dividing resistors, and a control circuit. A first voltage dividing resistor, a second voltage dividing resistor, and a third voltage dividing resistor are coupled between an input voltage and ground in series to divide the input voltage. The control circuit senses a first voltage signal, a second voltage signal, and a third voltage signal between the first voltage dividing resistor and the second voltage dividing resistor, between the second voltage dividing resistor and the third voltage dividing resistor, and the input resistor respectively, and adjusts a setting voltage signal according to the first voltage signal, the second voltage signal, and the third voltage signal.
    Type: Application
    Filed: September 12, 2013
    Publication date: March 13, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Chung-Tai Cheng, Chia-Hsiu Lin
  • DRIVING CIRCUIT HAVING VOLTAGE DIVIDING CIRCUITS AND COUPLING CIRCUIT FOR CONTROLLING DUTY CYCLE OF TRANSISTOR AND RELATED CIRCUIT DRIVING METHOD THEREOF
    Publication number: 20140070719
    Abstract: A driving circuit includes: a first voltage dividing circuit arranged to generate a first voltage-divided signal according to a supply voltage; a second voltage dividing circuit arranged to generate a second voltage-divided signal according to specific voltage; a coupling circuit coupled between the first voltage dividing circuit and the second voltage dividing circuit, and arranged to couple the first voltage-divided signal into the second voltage-divided signal to generate a coupling signal; and a control circuit arranged to generate a control signal at least according to the coupling signal and a feedback signal to control a duty cycle of a transistor, wherein the feedback is generated by the transistor.
    Type: Application
    Filed: January 11, 2013
    Publication date: March 13, 2014
    Applicant: RAYDIUM SEMICONDUCTOR CORPORATION
    Inventor: Yu-En Lee
  • LED DRIVING APPARATUS AND OPERATING METHOD THEREOF
    Publication number: 20140070726
    Abstract: A LED driving apparatus includes an output stage, an input resistor, a plurality of voltage dividing resistors, and a control circuit. The output stage includes at least one LED. A first voltage dividing resistor, a second voltage dividing resistor, and a third voltage dividing resistor are coupled between a specific voltage and ground in series to divide the specific voltage. A LED current passing through the LED has a duty cycle changed with the specific voltage. The control circuit senses a first voltage signal, a second voltage signal, and a third voltage signal between the first voltage dividing resistor and the second voltage dividing resistor, between the second voltage dividing resistor and the third voltage dividing resistor, and the input resistor respectively, and adjusts a setting voltage signal according to the first voltage signal, the second voltage signal, and the third voltage signal.
    Type: Application
    Filed: September 6, 2013
    Publication date: March 13, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Chung-Tai Cheng, Chia-Hsiu Lin
  • TIMING CONTROLLER, DISPLAY DEVICE AND DRIVING METHOD THEREOF
    Publication number: 20140062994
    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: Application
    Filed: February 9, 2013
    Publication date: March 6, 2014
    Applicant: RAYDIUM SEMICONDUCTOR CORPORATION
    Inventor: YING-LIEH CHEN
  • Signal circuit
    Patent number: 8659332
    Abstract: A signal circuit includes a clock terminal for transmitting a reference clock and a data terminal for transmitting an input/output data. In an embodiment, the frequency of the reference clock is one-eighth of the bit rate of the input/output data.
    Type: Grant
    Filed: January 4, 2012
    Date of Patent: February 25, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Ko-Yang Tso, Hui-Wen Miao, Yann-Hsiung Liang, Chin-Chieh Chao, Ren-Feng Huang
  • POWER-ON RESET CIRCUIT
    Publication number: 20140049300
    Abstract: A power on reset circuit is capable of changing logic level of reset signal at different threshold voltages.
    Type: Application
    Filed: October 30, 2013
    Publication date: February 20, 2014
    Applicant: RAYDIUM SEMICONDUCTOR CORPORATION
    Inventor: LI PING LIN
  • Touch sensing circuit and touch sensing method
    Patent number: 8654089
    Abstract: The invention discloses a touch sensing circuit applied to a capacitance touch panel for detecting the position of a sensed object touching the capacitance touch panel. The touch sensing circuit includes a first signal supplying module, a second signal supplying module, a first measurement module, a second measurement module and a processing module. The first signal supplying module inputs signals in turn to first sensing lines arranging along the first direction. The second signal supplying module inputs signals in turn to second sensing lines arranging along the second direction. The first measurement module and the second measurement module are used for measuring the first equivalent capacitances of the first sensing lines and that of the second sensing lines. The processing module is coupled to first measurement module and the second measurement module for determining the position of the sensed object.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: February 18, 2014
    Assignee: Raydium Semiconductor Corporation
    Inventors: Shih-Tzung Chou, Zong-Lin Wu
  • DRIVING CIRCUIT AND OPERATING METHOD THEREOF
    Publication number: 20140028641
    Abstract: The invention provides a driving circuit applied in a LCD apparatus. The driving circuit includes N first channels, N second channels, 2N first switching units, and 2N second switching units. N is a positive integer and N?2. N second channels correspond to N first channels. When the driving circuit is operated under a first operation mode, N first switching units in the N first channels switch to connect with the corresponding N second channels, and the other N first switching units in the N second channels switch to connect with the corresponding N first channels according to a control signal respectively. N second switching units in the N first channels switch to connect with the corresponding N second channels, and the other N second switching units in the N second channels switch to connect with the corresponding N first channels according to a control signal respectively.
    Type: Application
    Filed: July 25, 2013
    Publication date: January 30, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Yi-Ting Wang, Li-Ping Lin, Ying-Lieh Chen
  • TOUCH INPUT ELECTRONIC DEVICE
    Publication number: 20140028622
    Abstract: An touch input electronic device includes: a touch input device; a clock generation circuit, generating a first clock and a second clock; a touch sensing circuit, coupled to the touch input device, the touch sensing circuit operated under the first clock; a logic circuit, receiving a sensing output signal from the touch sensing circuit, the logic circuit operated under the second clock; and a conversion circuit, outputting an output voltage under control of the logic circuit, the output voltage coupled to the touch sensing circuit, the conversion circuit operated under the second clock. In response to the sensing output signal from the touch sensing circuit, the logic circuit controls the conversion circuit to adjust the output voltage to detect a capacitance variance of the touch input device.
    Type: Application
    Filed: October 2, 2013
    Publication date: January 30, 2014
    Applicant: Raydium Semiconductor Corporation
    Inventors: Yu Kuang, Shih-Tzung Chou
  • LEVEL SHIFTER
    Publication number: 20140015588
    Abstract: A level shifter is disclosed and includes at least four Type 1 transistors and at least four Type 2 transistors. The sources of several Type 1 transistors are electrically connected to a first voltage terminal while the sources of several Type 2 transistors are connected to a second voltage terminal. The level shifter receive an input signal and outputs a logically equivalent output signal with higher voltage, wherein the voltage of the output signal is between the voltages of the first voltage terminal and the second voltage terminal.
    Type: Application
    Filed: September 19, 2013
    Publication date: January 16, 2014
    Applicant: RAYDIUM SEMICONDUCTOR CORPORATION
    Inventor: Ying-Lieh Chen
  • DISPLAY DEVICE AND SOURCE DRIVER THEREOF
    Publication number: 20140015815
    Abstract: The present invention discloses a display device and its source driver comprising a plurality of data lines, a selection module, and a plurality of channel groups. The selection module receives a plurality of first data signals from the data lines, rearranges the first data signals in a first mode or a second mode according to a mode control signal, and outputs a plurality of second data signals accordingly. The channel groups transmit the second data signals outputted by the selection module, and each channel group has a first channel unit and a second channel unit. The first channel unit and the second channel unit of any of the channel groups respectively receives the different second data signals in the first mode, and the first channel unit and the second channel unit of any of the channel groups respectively receives the same second data signal in the second mode.
    Type: Application
    Filed: October 18, 2012
    Publication date: January 16, 2014
    Applicant: RAYDIUM SEMICONDUCTOR CORPORATION
    Inventor: KAI-LAN CHUANG