Patents Assigned to Raydium Semiconductor Corporation
  • Patent number: 11361706
    Abstract: A micro-LED display system is disclosed. The micro-LED display system includes a host, a plurality of row/column drivers and a plurality of ?ICs. The row/column drivers are coupled to the host through serial interfaces and used to provide a plurality of row clock signals and a plurality of column data signals respectively. The ?ICs are arranged as a matrix including columns of ?ICs and rows of ?ICs receiving the column data signals and the row clock signals respectively. All ?ICs in the same column of ?ICs are cascaded in order and all ?ICs in the same row of ?ICs are cascaded in order.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: June 14, 2022
    Assignee: Raydium Semiconductor Corporation
    Inventors: Kuan-Hsien Lee, Chien-Yu Chan, Yann-Hsiung Liang, Yu-Lung Lo
  • Patent number: 11341881
    Abstract: A level shifter circuit includes an input terminal, a first output terminal, a second output terminal, an output stage, a first control bias unit, a second control bias unit, and an output stage. The input stage includes a first transistor and a second transistor, and their gates are coupled to the input terminal. The first control bias unit includes a third transistor and a fourth transistor coupled to the first transistor and second transistor respectively and their gates are controlled by a first bias. The output stage includes a fifth transistor and a sixth transistor coupled to the third transistor and fourth transistor respectively and their gates are coupled to the first output terminal and second output terminal. The second control bias unit includes a seventh transistor and an eighth transistor coupled to the fifth transistor and sixth transistor respectively and their gates are controlled by a second bias.
    Type: Grant
    Filed: February 2, 2016
    Date of Patent: May 24, 2022
    Assignee: Raydium Semiconductor Corporation
    Inventors: Po-Cheng Lin, Yu-Chun Lin
  • Patent number: 11329667
    Abstract: A stream decompression circuit is disclosed. The stream decompression circuit includes a coding length first-in-first-out (FIFO) and a calculation circuit. The coding length FIFO is coupled to a variable length coding (VLC) circuit and used to store a coding length that the VLC circuit codes sub-streams and output a specific number of bits when the coding length accumulates over the specific number of bits. The calculation circuit is coupled between the coding length FIFO and a multiplexer circuit and used to calculate a number of bits required for decompression and output an output multiplex control signal to the multiplexer circuit to control the multiplexer circuit to output the sub-streams according to a specific order.
    Type: Grant
    Filed: January 8, 2021
    Date of Patent: May 10, 2022
    Assignee: Raydium Semiconductor Corporation
    Inventor: Chih-Liang Wu
  • Patent number: 11158685
    Abstract: An OLED touch display operation method is disclosed. The OLED touch display operation method includes the following steps: controlling a touch scan transition timing and a display multiplexer switching timing to maintain a specific equidistant relationship; when the OLED touch display performs display function, the OLED touch display performs touch scanning only for a part of display time, and stops touch scanning or performs touch voltage compensation scanning for another part of display time; and when being interfered by external noise, the OLED touch display performs touch scanning only in a blanking period out of the display time and the touch scanning frequency can be adjusted to avoid interference of external noise.
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: October 26, 2021
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chen-Wei Yang, Cheng-Nan Lin
  • Patent number: 11087697
    Abstract: A source driver including a digital-to-analog converter and an output buffer with an interpolation function is disclosed. A digital-to-analog converter converts a plurality of digital input voltages into a plurality of analog input voltages. The output buffer interpolates the analog input voltages. The output buffer outputs a first interpolated output voltage at a first time and a second interpolated output voltage at a second time respectively. A first interpolated voltage output curve of the first interpolated output voltage versus a digital input code and a second interpolated voltage output curve of the second interpolated output voltage versus the digital input code are both non-linear and opposite each other. The output buffer averages the first interpolated voltage output curve at the first time and the second interpolated voltage output curve at the second time to achieve a linear interpolated voltage characteristic.
    Type: Grant
    Filed: March 19, 2020
    Date of Patent: August 10, 2021
    Assignee: Raydium Semiconductor Corporation
    Inventors: Tzong-Yau Ku, Jun-Ren Shih
  • Patent number: 10984701
    Abstract: A source driver includes a phase generator, a control circuit, and an output circuit. The phase generator is configured to generate a plurality of output clock signals according to an input clock signal, in which the phases of the output clock signals are different from each other. The control circuit is configured to sequentially generate a plurality of control signals according to the output clock signals and a latch signal. The output circuit is configured to sequentially output a plurality of data voltages separately according to the control signals.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: April 20, 2021
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chih-Chuan Huang, Yu-Chun Lin, Ching Chuan Chiu
  • Patent number: 10937724
    Abstract: A package structure applied to a driving apparatus of a display is disclosed. The driving apparatus includes at least one driving unit. The package structure includes a substrate, a first connecting unit, a second connecting unit and at least one package unit. The substrate is used to carry the driving unit. The first connecting unit is disposed at one side of the substrate. A longitudinal direction of the first connecting unit is parallel to a first direction. The second connecting unit is disposed at the other side of the substrate. A longitudinal direction of the second connecting unit is parallel to the first direction. The package unit is used to package the driving unit to form driving unit package object. A longitudinal direction of the driving unit package object is parallel to a second direction. The first direction and the second direction are perpendicular to each other.
    Type: Grant
    Filed: April 17, 2019
    Date of Patent: March 2, 2021
    Assignee: Raydium Semiconductor Corporation
    Inventors: Ching-Yung Chen, Wen-Tsung Lin
  • Patent number: 10938379
    Abstract: An automatic frequency modulation circuit and an automatic frequency modulation method using efficiency statistics as a reference for frequency modulation applied to a pulse-width modulation (PWM) system are disclosed. The automatic frequency modulation circuit includes an oscillator unit, an on-time generating unit, a frequency adjusting unit and a frequency selecting unit. The oscillator unit receives a reference current and generate a clock signal. The on-time generating unit, coupled to the oscillator unit, receives a reference voltage and a first voltage of the oscillator unit and generates an on-time signal. The frequency adjusting unit, coupled to the on-time generating unit, receives the on-time signal and a PWM signal and generates a frequency adjusting signal. The frequency selecting unit is coupled to the frequency adjusting unit and automatically adjusts an original frequency according to the frequency adjusting signal to generate an adjusted frequency.
    Type: Grant
    Filed: June 17, 2020
    Date of Patent: March 2, 2021
    Assignee: Raydium Semiconductor Corporation
    Inventors: Ji-Ting Lai, Shen-Xiang Lin, Chih-Jen Hung
  • Patent number: 10886936
    Abstract: An image processing apparatus is applied to a display and includes a sampling unit, a comparing unit, a determining unit and an operating unit. The sampling unit is configured to receive a pulse-width modulation (PWM) signal and sample the PWM signal to output a current image. The comparing unit is coupled to the sampling unit and configured to compare the current image with a previous image to generate a comparison result, wherein the previous image is prior to the current image. The determining unit is coupled to the comparing unit and configured to determine whether the current image is the same with the previous image according to the comparison result and a threshold value. If a determination result of the determining unit is YES, the operating unit stops its operation.
    Type: Grant
    Filed: December 6, 2019
    Date of Patent: January 5, 2021
    Assignee: Raydium Semiconductor Corporation
    Inventors: Yu-Min Chang, Chung-Sung Tsai, Yan-Han Lin
  • Patent number: 10819339
    Abstract: A capacitive touch sensing circuit includes a first switch to a fourteenth switch, an operational amplifier, a comparator, a detection capacitor, a feedback capacitor, an amplifier capacitor and a mutual inductance capacitor. The tenth switch is coupled between a first node and a second node respectively coupled to a negative input terminal and an output terminal of operational amplifier. The amplifier capacitor is coupled between a third node and a fourth node. The eleventh switch is coupled between the first node and the third node. The twelfth switch is coupled between the second node and the fourth node. The thirteenth switch is coupled between the third node and the second node. The fourteenth switch is coupled between the fourth node and the first node. The capacitive touch sensing circuit sequentially operates under a first charging phase, a first transfer phase, a second charging phase and a second transfer phase.
    Type: Grant
    Filed: December 27, 2019
    Date of Patent: October 27, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chih-Kai Chang, Chih-Hsiung Chen, Yu-Chin Hsu
  • Patent number: 10817044
    Abstract: A power saving control apparatus applied to a display driving circuit is disclosed. The power saving control apparatus includes a data analysis unit, a bias control unit and a charge sharing unit. The bias control unit is used to perform bias control. The charge sharing unit is used for charge sharing. The data analysis unit is coupled to the bias control unit and the charge sharing unit respectively. The data analysis unit instantly analyzes the display data to generate an instant analysis result and dynamically adjust the setting of bias and slew rate of the bias control unit according to the instant analysis result. The data analysis unit can dynamically adjust the setting of charge sharing range and charge sharing group number needed to be performed by the charge sharing unit according to the instant analysis result.
    Type: Grant
    Filed: March 21, 2019
    Date of Patent: October 27, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chien-Hao Chen, Chih-Hao Wu, Chih-Chuan Huang, Sung-Bo Chen
  • Patent number: 10818211
    Abstract: A display apparatus is disclosed. The display apparatus includes a display panel, a master timing controller embedded driver (TED), N slave TEDs and an inter-chip bus. N is a positive integer. The display panel has (N+1) display areas. The master TED is disposed corresponding to a first display area. The N slave TEDs are disposed corresponding to a second display area˜a (N+1)-th display area respectively and controlled by the master TED. The inter-chip bus includes a first wire and a second wire coupled between the master TED and N slave TEDs respectively and used for bi-directionally transmitting clock signal and data signal respectively.
    Type: Grant
    Filed: April 25, 2019
    Date of Patent: October 27, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Shang-Han Yu, Sung-Bo Chen, Chih-Chuan Huang
  • Patent number: 10789882
    Abstract: An optical compensation apparatus applied to panels is disclosed. A panel of the panels includes sub-pixels. The optical compensation apparatus includes an optical measurement module, a data processing module and an optical compensation module. The optical measurement module measures optical measurement values corresponding to the sub-pixels. The data processing module determines first optical compensation values needed for the sub-pixels according to the optical measurement values, determines an overall compensation operation reference of the panel accordingly, determines a demura algorithm suitable for the panel according to at least one threshold compensation value and the overall compensation operation reference and obtains second optical compensation values accordingly. Then, the optical compensation module outputs the second optical compensation values to perform optical compensation on a display data provided to the panel.
    Type: Grant
    Filed: June 15, 2018
    Date of Patent: September 29, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Shang-Ping Tang, Hung Li
  • Patent number: 10789889
    Abstract: A source driver module, a display device and a method for driving a display panel are provided. The method for driving a display panel is applicable to the source driver module, which includes a source driver circuit, a first switch coupled between the source driver circuit and a first end of a first data line, and a second switch coupled between the source driver circuit and a second end of the first data line. The method for driving the display panel includes: when the display panel displays a first image, the source driver circuit outputs a first voltage signal to the first end of the first data line through the first switch, and when the display panel displays a second image after displaying the first image, the source driver circuit outputs a second voltage signal to the second end of the first data line through the second switch.
    Type: Grant
    Filed: March 8, 2019
    Date of Patent: September 29, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chi-Hsiang Oulee, Tzong-Yau Ku, Jun-Ren Shih
  • Patent number: 10755634
    Abstract: A display driving circuit applied to a display includes a detection unit, a counting unit and an adjusting unit. The detection unit is configured to detect N pulses of an emission control signal of the display in a frame and define a frame porch interval increasing unit accordingly. The frame porch interval increasing unit equals to 1/N frame. N is a positive integer. The counting unit is coupled to the detection unit and configured to count frames according to a first refresh rate. The adjusting unit is coupled to the detection unit and the counting unit and configured to insert M frame porch interval increasing units every time when the counting unit counts L frames to adjust the first refresh rate to a second refresh rate, wherein the second refresh rate is lower than the first refresh rate. L and M are positive integers and L?M.
    Type: Grant
    Filed: October 1, 2019
    Date of Patent: August 25, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chun-Lin Hou, Shang-Ping Tang
  • Patent number: 10755628
    Abstract: A display apparatus including a voltage buffer, a display panel and a pixel loading compensation circuit is disclosed. The voltage buffer is used to receive a ramp voltage and output an output current. The display panel includes pixel switches and pixel capacitors. The pixel switches are arranged in parallel and coupled to the voltage buffer. The pixel capacitors are coupled between the pixel switches and ground. The pixel loading compensation circuit includes compensation switches and compensation current sources. The compensation switches corresponding to the pixel switches are arranged in parallel and coupled to the voltage buffer. The compensation current sources are coupled between the compensation switches and ground. The operation of the compensation switches is opposite to the operation of the corresponding pixel switches.
    Type: Grant
    Filed: March 6, 2019
    Date of Patent: August 25, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chi-Hsiang Oulee, Tzong-Yau Ku, Jun-Ren Shih
  • Patent number: 10726805
    Abstract: A display driving apparatus applied to a panel is disclosed. The panel displays a first image with a first refresh rate. A first refresh cycle corresponding to the first refresh rate includes a refresh period and at least one non-refresh period. The display driving apparatus includes a real-time determination module and a data processing module. The real-time determination module is coupled to the panel and used to immediately determine whether the panel wants to replace the originally displayed first image with a second image during the first refresh cycle. The data processing module is coupled to the real-time determination module and the panel. If a determination result of the real-time determination module is yes, the data processing module immediately controls the panel to start to display the second image at a first time during the first refresh cycle.
    Type: Grant
    Filed: August 31, 2018
    Date of Patent: July 28, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chih Chuan Huang, Yu-Yuan Chang, Wen-Fa Hsu
  • Patent number: 10720834
    Abstract: A charge pump, applied to an OLED display panel and coupled to an output capacitor, includes a first switch to a tenth switch and a first capacitor to a third capacitor. The first switch and second switch are coupled in series between a first voltage and a second voltage lower than first voltage. The third switch is coupled to second voltage. The sixth switch is coupled to first voltage. The seventh switch is coupled to second voltage. The fourth switch, eighth switch and tenth switch are coupled to output capacitor. The first capacitor is coupled between first switch and second switch. The second capacitor is coupled between fifth switch and sixth switch. The third capacitor is coupled between seventh switch and eighth switch. The charge pump is operated in a first phase, a second-A phase, the first phase and a second-B phase in order to provide negative output voltage.
    Type: Grant
    Filed: April 18, 2019
    Date of Patent: July 21, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Pei-Kai Tseng, Chen-Pin Lo, Shen-Xiang Lin, Chih-Jen Hung
  • Patent number: 10684726
    Abstract: A capacitive touch sensing circuit includes a first switch˜a fifth switch, an internal capacitor, an integrator and a capacitor. The first switch and an external capacitor are coupled in series between a first voltage and a ground voltage, one terminal of the second switch is coupled between the first switch and the external capacitor, and one terminal of the third switch is coupled to the other terminal of the second switch. The fourth switch and the internal capacitor are coupled in series between a second voltage and the ground voltage, wherein the second voltage is a negative value of the first voltage, and one terminal of the fifth switch is coupled to the other terminal of the second switch and the other terminal of the fifth switch is coupled between the fourth switch and the internal capacitor.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: June 16, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Chih-Hsiung Chen, Yu-Chin Hsu, Chih Yuan
  • Patent number: 10685611
    Abstract: A display driving apparatus applied to a panel is disclosed. The panel displays a first image with a first refresh rate. A first refresh cycle corresponding to the first refresh rate includes a refresh period and at least one non-refresh period. The display driving apparatus includes a real-time determination module and a data processing module. The real-time determination module is coupled to the panel and used to immediately determine whether the panel wants to replace the originally displayed first image with a second image during the first refresh cycle. The data processing module is coupled to the real-time determination module and the panel. If a determination result of the real-time determination module is yes, the data processing module immediately controls the panel to start to display the second image at a first time during the first refresh cycle.
    Type: Grant
    Filed: September 6, 2018
    Date of Patent: June 16, 2020
    Assignee: Raydium Semiconductor Corporation
    Inventors: Po-Cheng Lin, Hua-Ming Lu