Patents Assigned to SAPIEN SEMICONDUCTORS INC.
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Publication number: 20240153444Abstract: The present embodiments disclose a pixel. A pixel according to an embodiment of the present disclosure comprises a luminous element and a pixel circuit connected to the luminous element, wherein the pixel circuit include a first pixel circuit configured to control light-emission and non-emission of the luminous element in response to a control signal applied to each of a plurality of subframes constituting a single frame during a light-emitting period, a second pixel circuit configured to store bit values of image data in a data writing period and generate the control signal based on the bit values and a clock signal, a bias circuit configured to supply a driving power to the first pixel circuit, and a bias controller configured to generate a bias control signal for controlling the bias circuit and output the bias control signal to the bias circuit.Type: ApplicationFiled: January 17, 2024Publication date: May 9, 2024Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Jun Young JUNG, Myunghee LEE
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Patent number: 11922860Abstract: Provided is a pixel driving circuit including a first circuit configured to control, in a data writing mode, a signal related to driving of one or more light-emitting elements, and a second circuit configured to supply, in a driving mode, power to the one or more light-emitting elements based on a signal transmitted from the first circuit.Type: GrantFiled: September 16, 2022Date of Patent: March 5, 2024Assignee: Sapien Semiconductors Inc.Inventors: Sung Ho Hwang, Ji Han Kim, Ji Haeng Lee, Hye Min Bae, Dae Young Jung
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Publication number: 20240062714Abstract: Provided is a pixel driving circuit including a first circuit configured to control, in a data writing mode, a signal related to driving of one or more light-emitting elements, and a second circuit configured to supply, in a driving mode, power to the one or more light-emitting elements based on a signal transmitted from the first circuit.Type: ApplicationFiled: October 31, 2023Publication date: February 22, 2024Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Sung Ho HWANG, Ji Haeng LEE, Hye Min BAE, Dae Young JUNG
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Publication number: 20240054944Abstract: A pixel driving circuit includes a memory unit including a data memory and a register and storing data related to driving of a luminous element, a driver supplying electrical power to the luminous element based on data stored in the memory unit, and a reset unit controlling reset of the memory unit, wherein the reset unit generates a first reset signal for controlling reset of the data memory and a second reset signal for controlling reset of the register.Type: ApplicationFiled: July 14, 2023Publication date: February 15, 2024Applicant: Sapien Semiconductor Inc.Inventors: Ji Han KIM, Sung Ho HWANG, Ji Haeng LEE, Dae Young JUNG, Jong Gu JEON
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Publication number: 20240054928Abstract: A pixel driving circuit includes a memory unit storing data based on a first signal and a second signal, a driver connected to a luminous element and supplying electric power to the luminous element based on the data stored in the memory unit, and a test controller controlling entry into a test mode in which it is tested whether the pixel driving circuit is defective, wherein the test controller generates a test mode activation signal based on the first signal and the second signal.Type: ApplicationFiled: August 7, 2023Publication date: February 15, 2024Applicant: Sapien Semiconductors Inc.Inventors: Ji Han KIM, Sung Ho HWANG, Ji Haeng LEE, Dae Young JUNG
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Publication number: 20240054947Abstract: Disclosed is a digital display system based on a common interface. More particularly, a cluster pixel circuit includes a row terminal connected to a row line for receiving PWM (Pulse Width Modulation) clock signal; a column terminal connected to a column line for receiving N-bit data; a first individual pixel driver for driving a first pixel in the cluster pixel; and a second individual pixel driver connected to the first individual pixel driver and for driving a second pixel in the cluster pixel.Type: ApplicationFiled: August 10, 2023Publication date: February 15, 2024Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Dae Young JUNG, Geun Taek LEE, Hyun Tae JUNG, Jong Gu JEON, Myunghee LEE
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Publication number: 20240038173Abstract: Provided is a pixel driving circuit capable of reducing power consumed for pixel driving by reducing the number of times a capacitor is charged. The pixel driving circuit includes: a video memory configured to store video data related to driving of a plurality of light-emitting devices; a plurality of sub-pixel driving units, respectively corresponding to the plurality of light-emitting devices, configured to supply power to the plurality of light-emitting devices according to the video data stored in the video memory, each of the plurality of sub-pixel driving units having a capacitor unit for charging power required for driving each of the plurality of light-emitting devices; a charge control memory configured to store data related to charging of the capacitor unit; and a charge controller configured to control whether the capacitor unit is charged according to charge control data stored in the charge control memory.Type: ApplicationFiled: October 16, 2023Publication date: February 1, 2024Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Ji Han KIM, Jin Woong Jang, Ji Haeng Lee, Dae Young Jung, Jong Gu Jeon
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Publication number: 20240038138Abstract: A display driving apparatus transmitting data to each of a plurality of display driver integrated circuits (ICs) through a mobile industry processor interface (MIPI) using a point-to-multipoint (multi-drop) manner and a data transmission method thereof, the method may obtain display data and command data, transmit the display data and the command data to each of a plurality of display driver ICs through a MIPI using a point-to-multipoint (multi-drop) manner, and independently control sub-pixels corresponding to each of the plurality of display driver ICs based on the display data and the command data.Type: ApplicationFiled: July 10, 2023Publication date: February 1, 2024Applicant: Sapien Semiconductors Inc.Inventors: Do Kyung KIM, Hyun Tae Jung, Jong Gu Jeon, Dae Young Jung
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Publication number: 20240005853Abstract: The present embodiments disclose a display device. A display device according to an embodiment of the present disclosure may comprise a pixel including a plurality of sub-pixels having luminous elements respectively, wherein each of the plurality of sub-pixels may be arranged in parallel with each other; and a pixel circuit connected to the luminous elements for driving the luminous elements; wherein the luminous elements may emit light of one color among red, green, and blue, and wherein a number of luminous elements emitting red light may be greater than a number of luminous elements emitting green or blue light.Type: ApplicationFiled: September 14, 2023Publication date: January 4, 2024Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Jun Young JUNG, Myunghee LEE
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Patent number: 11862071Abstract: The present embodiments disclose a display device.Type: GrantFiled: August 18, 2022Date of Patent: January 2, 2024Assignee: SAPIEN SEMICONDUCTORS INC.Inventors: Jae Hoon Lee, Jun Young Jung
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Publication number: 20230419889Abstract: The present invention is related to pixels and a display apparatus including: a display unit including a plurality of pixels; a signal control unit for generating a first voltage signal and a second voltage signal; a column driver connected to each of the pixels to transmit the first voltage signal to the pixel through a column line; and a row driver connected to each of the pixels to transmit the second voltage signal to the pixel through a row line, wherein the signal control unit generates the second voltage signal so that a voltage level of the second voltage signal rises to be higher than or equal to a predetermined level value during a non-emission period of the pixel.Type: ApplicationFiled: September 11, 2023Publication date: December 28, 2023Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Jae Hoon LEE, Jin Woong JANG
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Publication number: 20230395021Abstract: The present specification discloses a pixel driving circuit having a reduced number of external contacts. A conventional digital driving pixel requires two contacts (Vcc, GND) related to power, a contact (row signal, column signal) for inputting two signals for digital driving, a contact (mode selection) for inputting a set value required for driving the pixel, and a contact (reset) for maintaining video data for one frame to implement a cycle function during PWM driving and for inputting a reset signal to clear previous video data before inputting new video data. However, the higher the number of contacts, the lower the efficiency of pick & place in the manufacturing process. Thus, in the present specification, a pixel driving circuit is proposed, which can be digitally driven even when the number of contacts is reduced through combination of a row signal and a column signal.Type: ApplicationFiled: December 2, 2021Publication date: December 7, 2023Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Jae Hoon LEE, Ji Han KIM
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Publication number: 20230386400Abstract: A display apparatus is capable of improving a dynamic false contour. The display apparatus may control to change an order of a plurality of pulses of which widths are modulated for an emission time set within one frame, or divide pulses corresponding to the most significant bit (MSB) and the second significant bit (MSB-1) of image data among the pulses into two or more sub-pulses, and output the sub-pulses.Type: ApplicationFiled: August 11, 2023Publication date: November 30, 2023Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Ji Haeng LEE, Jin Woong JANG, Ji Han KIM, Dae Young JUNG, Jong Gu JEON, Do Kyung KIM
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Patent number: 11817041Abstract: The present invention is related to pixels and a display apparatus including: a display unit including a plurality of pixels; a signal control unit for generating a first voltage signal and a second voltage signal; a column driver connected to each of the pixels to transmit the first voltage signal to the pixel through a column line; and a row driver connected to each of the pixels to transmit the second voltage signal to the pixel through a row line, wherein the signal control unit generates the second voltage signal so that a voltage level of the second voltage signal rises to be higher than or equal to a predetermined level value during a non-emission period of the pixel.Type: GrantFiled: September 11, 2020Date of Patent: November 14, 2023Assignee: SAPIEN SEMICONDUCTORS INC.Inventors: Jae Hoon Lee, Jin Woong Jang
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Publication number: 20230360587Abstract: Provided is a pixel driving circuit including a first circuit configured to control, in a data writing mode, a signal related to driving of one or more light-emitting elements, and a second circuit configured to supply, in a driving mode, power to the one or more light-emitting elements based on a signal transmitted from the first circuit.Type: ApplicationFiled: September 16, 2022Publication date: November 9, 2023Applicant: Sapien Semiconductors Inc.Inventors: Sung Ho HWANG, Ji Han Kim, Ji Haeng Lee, Hye Min Bae, Dae Young Jung
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Patent number: 11783746Abstract: Provided are a pixel having two contacting points and an operating method of the pixel. The pixel includes a positive power terminal and a negative power terminal which are related to power required for driving of a pixel driving circuit unit driving a plurality of light-emitting elements, wherein the positive power terminal is connected to a data driving circuit, and the negative power terminal is connected to a scan driving circuit. The pixel may be driven according to a potential difference between a signal output from the data driving circuit and a signal output from the scan driving circuit.Type: GrantFiled: November 12, 2020Date of Patent: October 10, 2023Assignee: SAPIEN SEMICONDUCTORS INC.Inventors: Jae Hoon Lee, Jin Woong Jang
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Patent number: 11776462Abstract: A display apparatus is capable of improving a dynamic false contour. The display apparatus may control to change an order of a plurality of pulses of which widths are modulated for an emission time set within one frame, or divide pulses corresponding to the most significant bit (MSB) and the second significant bit (MSB-1) of image data among the pulses into two or more sub-pulses, and output the sub-pulses.Type: GrantFiled: March 22, 2022Date of Patent: October 3, 2023Assignee: SAPIEN SEMICONDUCTORS INC.Inventors: Ji Haeng Lee, Jin Woong Jang, Ji Han Kim, Dae Young Jung, Jong Gu Jeon, Do Kyung Kim
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Publication number: 20230290304Abstract: Provided is a pixel driving circuit capable of reducing power consumed for pixel driving by reducing the number of times a capacitor is charged. The pixel driving circuit includes: a video memory configured to store video data related to driving of a plurality of light-emitting devices; a plurality of sub-pixel driving units, respectively corresponding to the plurality of light-emitting devices, configured to supply power to the plurality of light-emitting devices according to the video data stored in the video memory, each of the plurality of sub-pixel driving units having a capacitor unit for charging power required for driving each of the plurality of light-emitting devices; a charge control memory configured to store data related to charging of the capacitor unit; and a charge controller configured to control whether the capacitor unit is charged according to charge control data stored in the charge control memory.Type: ApplicationFiled: June 29, 2022Publication date: September 14, 2023Applicant: Sapien Semiconductors Inc.Inventors: Ji Han Kim, Jin Woong Jang, Ji Haeng Lee, Dae Young Jung, Jong Gu Jeon
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Patent number: 11735106Abstract: The present embodiments disclose a display device.Type: GrantFiled: September 12, 2022Date of Patent: August 22, 2023Assignee: SAPIEN SEMICONDUCTORS INC.Inventors: Jae Hoon Lee, Jun Young Jung
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Publication number: 20230237956Abstract: The present embodiments disclose a pixel driving circuit.Type: ApplicationFiled: February 24, 2023Publication date: July 27, 2023Applicant: SAPIEN SEMICONDUCTORS INC.Inventors: Jun Young JUNG, Myung Hee LEE