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公开(公告)号：US12112699B2
公开(公告)日：2024-10-08
申请号：US18032461
申请日：2021-12-02
发明人： Jae Hoon Lee , Ji Han Kim
IPC分类号： G09G3/3233
CPC分类号： G09G3/3233 , G09G2310/0286 , G09G2310/08
摘要： 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.
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公开(公告)号：US12062328B2
公开(公告)日：2024-08-13
申请号：US18113852
申请日：2023-02-24
发明人： Jun Young Jung , Myunghee Lee
IPC分类号： G09G3/32
CPC分类号： G09G3/32 , G09G2300/08 , G09G2310/0289 , G09G2310/08 , G09G2330/021
摘要： The present embodiments disclose a pixel driving circuit. A pixel driving circuit according to an embodiment of the present disclosure is electrically connected to a luminous element and comprises a first 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 included in a frame, a second circuit configured to store bit values of multi-bit data in the frame and generate the control signal based on the stored bit values, and a clock signal such that each subframe included in the frame is controlled according to each bit value, and wherein each of the plurality of subframes includes a data-writing period and a light-emitting period, during the data-writing period of each subframe, the second circuit receives and stores a corresponding bit string from among a plurality of bit strings of n-bit data, wherein the plurality of bit strings are generated by a combination of bits in the number of n, which is smaller than m, from among m bits constituting a bit string of the multi-bit data, and the n-bit data is a bit string in which n bits from among the m bits are combined such that a difference in light-emitting periods of the plurality of subframes is minimized.
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公开(公告)号：US20240212592A1
公开(公告)日：2024-06-27
申请号：US18512214
申请日：2023-11-17
发明人： Jun Young JUNG , Myunghee LEE
IPC分类号： G09G3/3208 , G09G3/20
CPC分类号： G09G3/3208 , G09G3/2011 , G09G3/2014 , G09G2310/027
摘要： A display device with combined pixel driving methods includes a pixel unit in which a plurality of pixels are arranged, each pixel including a luminous element and a pixel circuit connected to the luminous element, and a driver configured to generate and supply a driving current, a clock signal, and a driving method selection signal to the pixel unit, wherein the pixel circuit of each of the plurality of pixels drives light emission of the luminous element based on the driving method selection signal through one of a pulse width modulation (PWM) driving method or a pulse amplitude modulation (PAM) driving method.
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公开(公告)号：US20240038173A1
公开(公告)日：2024-02-01
申请号：US18487188
申请日：2023-10-16
发明人： Ji Han KIM , Jin Woong Jang , Ji Haeng Lee , Dae Young Jung , Jong Gu Jeon
IPC分类号： G09G3/3233
CPC分类号： G09G3/3233 , G09G2300/0857 , G09G2330/021 , G09G2310/061 , G09G2310/08 , G09G2300/0852
摘要： 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.
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公开(公告)号：US20240038138A1
公开(公告)日：2024-02-01
申请号：US18349532
申请日：2023-07-10
发明人： Do Kyung KIM , Hyun Tae Jung , Jong Gu Jeon , Dae Young Jung
CPC分类号： G09G3/2096 , G06F13/4282 , G09G2370/00 , G06F2213/0002
摘要： 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.
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公开(公告)号：US11705059B2
公开(公告)日：2023-07-18
申请号：US17942208
申请日：2022-09-12
发明人： Jae Hoon Lee , Jun Young Jung
IPC分类号： G09G3/32
CPC分类号： G09G3/32 , G09G2300/08 , G09G2310/0289 , G09G2310/08 , G09G2330/021
摘要： The present embodiments disclose a display device. A display device according to an embodiment of the present disclosure comprises a pixel unit including a plurality of pixels, each including a luminous element and a pixel circuit connected to the luminous element, a clock generator configured to generate a plurality of clock signals each corresponding to each of a plurality of subframes constituting a frame, and a parallel to serial converter configured to convert the plurality of clock signals to a serial clock signal and transfer the serial clock signal to the pixel unit, and wherein the pixel circuit of each pixel includes 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 the plurality of subframes and a second pixel circuit configured to store bit values of image data in the frame and generate the control signal based on the stored bit values and the serial clock signal such that each subframe included in the frame is controlled according to each bit value.
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公开(公告)号：US20230154387A1
公开(公告)日：2023-05-18
申请号：US17916347
申请日：2020-10-22
发明人： Jae Hoon LEE , Jin Woong JANG
CPC分类号： G09G3/32 , G06F1/163 , G09G2300/0857 , G09G2310/0272 , G09G2310/08 , G09G2330/021 , G09G2340/04 , G02B27/017
摘要： Provided is a pixel driving circuit operatable in a low-definition mode and a high-definition mode using the same pixel memory, and a display device including the same. The pixel driving circuit may include a driving line configured to connect between an emitter and a positive power source or between the emitter and a negative power source, a first transistor connected in series on the driving line and turned on in response to a pulse width modulation (PWM) signal, a first driving unit and a second driving unit that are connected in series on the driving line and electrically connected in parallel to each other, and a second transistor connected between a reference voltage source, which is connected to apply a reference voltage to the first driving unit and the second driving unit, and the second driving unit and turned on or off in response to a display mode selection signal.
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公开(公告)号：US11270665B2
公开(公告)日：2022-03-08
申请号：US17050948
申请日：2018-08-09
发明人： Jae Hoon Lee
摘要： Provided are a display device and a method of controlling a brightness of the display device.
The method of controlling a brightness of the display device according to an embodiment includes: applying first input image data to a display unit including a plurality of pixels to display a first image; detecting a brightness for each pixel from output image data of the first image displayed on the display unit, and extracting compensation pixels each having a brightness difference exceeding a reference value, the brightness difference being a difference between a detected brightness and a reference brightness; and generating compensation data of the compensation pixels based on the brightness differences of the compensation pixels.-
公开(公告)号：US11138922B2
公开(公告)日：2021-10-05
申请号：US16680745
申请日：2019-11-12
发明人： Jae Hoon Lee , Jin Woong Jang
IPC分类号： G09G3/32 , H05B45/325 , H05B45/00
摘要： The present specification discloses a light-emitting diode (LED) driving apparatus in which a voltage drop phenomenon due to a common impedance is mitigated. In the LED driving apparatus according to the present specification, a circuit is configured by combining N-type metal-oxide-semiconductor (NMOS) transistors or P-type MOS (PMOS) transistors such that a positive power source or a negative power source is not connected to a source terminal of a metal oxide semiconductor field-effect transistor (MOSFET). To this end, it is possible to eliminate common impedance effects on the positive power source or the negative power source.
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公开(公告)号：US20210217343A1
公开(公告)日：2021-07-15
申请号：US17148840
申请日：2021-01-14
发明人： Jae Hoon Lee , Jin Woong Jang
摘要： The present specification provides a display apparatus allowing brightness of a display panel to be more finely controlled as compared with the related art. The display apparatus according to the present specification includes a display panel in which a plurality of pixels are arranged in m×n, and K shift register units configured to sequentially output pulse signals having a width adjusted to adjust brightness of the display panel to m horizontal pixel lines, wherein each of the shift register units includes m main flip-flops and m−1 sub-flip-flops connected between the in main flip-flops.
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