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1. 发明申请

US20230005420A1 DISPLAY DEVICE 有权
公开(公告)号：US20230005420A1
公开(公告)日：2023-01-05
申请号：US17942219
申请日：2022-09-12
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee , Jun Young Jung
IPC分类号： G09G3/32
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.

2. 发明授权

US11170705B2 Minimulized pixel circuit 有权
公开(公告)号：US11170705B2
公开(公告)日：2021-11-09
申请号：US17155435
申请日：2021-01-22
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee , Jin Woong Jang
IPC分类号： G09G3/32
摘要： The present specification provides a pixel circuit miniaturized using a smaller number of transistors as compared with the related art. A 4T static random-access memory (SRAM) is used in an embedded pixel memory, and in order to prevent a voltage floating problem from occurring in a logic low state, a leakage current is designed to flow in one direction by adjusting a threshold voltage of a transistor. In addition, a pulse width modulation (PWM) control unit uses a smaller number of transistors as compared with the related art, and in order to prevent a voltage floating problem from occurring, a circuit capable of removing a floating voltage is provided.

3. 发明授权

US11270665B2 Display device and method for controlling brightness of same 有权
公开(公告)号：US11270665B2
公开(公告)日：2022-03-08
申请号：US17050948
申请日：2018-08-09
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee
IPC分类号： G09G5/10 , G09G3/32
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.

4. 发明授权

US11138922B2 LED driving apparatus having mitigated common impedance effect 有权
公开(公告)号：US11138922B2
公开(公告)日：2021-10-05
申请号：US16680745
申请日：2019-11-12
申请人： SAPIEN SEMICONDUCTORS INC.
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.

5. 发明申请

US20210217343A1 BRIGHTNESS CONTROLABLE DISPLAY APPARATUS 有权
公开(公告)号：US20210217343A1
公开(公告)日：2021-07-15
申请号：US17148840
申请日：2021-01-14
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee , Jin Woong Jang
IPC分类号： G09G3/20 , H03K7/08 , G11C19/28
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.

6. 发明授权

US11335251B2 LED driving apparatus having mitigated common impedance effect 有权
公开(公告)号：US11335251B2
公开(公告)日：2022-05-17
申请号：US17390085
申请日：2021-07-30
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee , Jin Woong Jang
IPC分类号： G09G3/32 , H05B45/325 , H05B45/60
摘要： An LED driving apparatus includes a driving circuit and multiple pixel circuits, each including: a pixel line connecting pixel power sources; an LED in series to the pixel line; two pixel MOSFETs connected in series to the pixel line, wherein the first MOSFET is turned on by the driving circuit and the second MOSFET is connected to the first MOSFET source; and a capacitor connected between the two MOSFET gates. The driving circuit includes: a driving line connecting driving power sources; a current source in series to the driving line; two driving MOSFETs connected in series to the driving line, wherein the first driving MOSFET is connected to the first pixel MOSFET gate and the second driving MOSFET is connected to the second pixel MOSFET gate and the first driving MOSFET source; and a switch connected between the gates of the first pixel and the first driving MOSFETs.

7. 发明申请

US20220036815A1 LED DRIVING APPARATUS HAVING MITIGATED COMMON IMPEDANCE EFFECT 有权
公开(公告)号：US20220036815A1
公开(公告)日：2022-02-03
申请号：US17390085
申请日：2021-07-30
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee , Jin Woong Jang
IPC分类号： G09G3/32 , H05B45/325
摘要： An LED driving apparatus includes a driving circuit and multiple pixel circuits, each including: a pixel line connecting pixel power sources; an LED in series to the pixel line; two pixel MOSFETs connected in series to the pixel line, wherein the first MOSFET is turned on by the driving circuit and the second MOSFET is connected to the first MOSFET source; and a capacitor connected between the two MOSFET gates. The driving circuit includes: a driving line connecting driving power sources; a current source in series to the driving line; two driving MOSFETs connected in series to the driving line, wherein the first driving MOSFET is connected to the first pixel MOSFET gate and the second driving MOSFET is connected to the second pixel MOSFET gate and the first driving MOSFET source; and a switch connected between the gates of the first pixel and the first driving MOSFETs.

8. 发明申请

US20210233463A1 MINIMULIZED PIXEL CIRCUIT 有权
公开(公告)号：US20210233463A1
公开(公告)日：2021-07-29
申请号：US17155435
申请日：2021-01-22
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee , Jin Woong Jang
IPC分类号： G09G3/32
摘要： The present specification provides a pixel circuit miniaturized using a smaller number of transistors as compared with the related art. A 4T static random-access memory (SRAM) is used in an embedded pixel memory, and in order to prevent a voltage floating problem from occurring in a logic low state, a leakage current is designed to flow in one direction by adjusting a threshold voltage of a transistor. In addition, a pulse width modulation (PWM) control unit uses a smaller number of transistors as compared with the related art, and in order to prevent a voltage floating problem from occurring, a circuit capable of removing a floating voltage is provided.

9. 发明申请

US20230005419A1 DISPLAY DEVICE 有权
公开(公告)号：US20230005419A1
公开(公告)日：2023-01-05
申请号：US17942208
申请日：2022-09-12
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee , Jun Young Jung
IPC分类号： G09G3/32
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.

10. 发明授权

US11482165B2 Pixel driving circuit 有权
公开(公告)号：US11482165B2
公开(公告)日：2022-10-25
申请号：US17547393
申请日：2021-12-10
申请人： SAPIEN SEMICONDUCTORS INC.
发明人： Jae Hoon Lee
IPC分类号： G09G3/32
摘要： The present embodiments disclose a pixel driving circuit and a display device including the same. A pixel driving circuit according to an embodiment of the present disclosure 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 a plurality of subframes constituting a frame during a light-emitting period and a second pixel circuit storing a bit value of image data in a data writing period and generating the control signal based on the bit value and a clock signal in the light-emitting period.

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