-
公开(公告)号：US11005484B2
公开(公告)日：2021-05-11
申请号：US16216226
申请日：2018-12-11
Applicant: Samsung Electronics Co., Ltd.
Inventor： Gyu Sik Kim , Woo Seok Kim , Tae Ik Kim , Hwan Seok Yeo
Abstract: A phase locked loop circuit includes a voltage controlled oscillator configured to output a clock signal having a predetermined frequency based in a control voltage, a phase frequency detector configured to compare the clock signal with a reference signal to output a first control signal and a second control signal, a charge pump configured to output the control voltage based on the first control signal and the second control signal, a voltage supply including an output terminal connected to an output terminal of the charge pump by a transmission switch, and a leakage remover circuit connected to the transmission switch and configured to remove a leakage current flowing through the transmission switch while the transmission switch is turned-off.
-
公开(公告)号：US10516405B2
公开(公告)日：2019-12-24
申请号：US16027646
申请日：2018-07-05
Applicant: Samsung Electronics Co., Ltd.
Inventor： Won Sik Yu , Woo Seok Kim , Ji Hyun Kim , Tae Ik Kim
Abstract: A semiconductor device includes a time-to-digital converter (TDC) that receives a reference frequency signal and a feedback frequency signal, and outputs a first digital signal indicating a time difference between the reference frequency signal and the feedback frequency signal; a digital loop filter (DLF) that outputs a second digital signal generated by filtering the first digital signal; a multiplier circuit that outputs one of a third digital signal and a final test signal, the third digital signal generated by performing a multiplication operation on the second digital signal using a multiplication coefficient; a digital-controlled oscillator (DCO) that generates an oscillation signal having a frequency based on the output one of the third digital signal and the final test signal; and a loop gain calibrator (LGC) that receives the oscillation signal, generates a pair of test signals, and determines the multiplication coefficient using the pair of test signals.
-
公开(公告)号：US10951215B2
公开(公告)日：2021-03-16
申请号：US16722362
申请日：2019-12-20
Applicant: Samsung Electronics Co., Ltd.
Inventor： Won Sik Yu , Woo Seok Kim , Ji Hyun Kim , Tae Ik Kim
Abstract: A semiconductor device includes a time-to-digital converter (TDC) that receives a reference frequency signal and a feedback frequency signal, and outputs a first digital signal indicating a time difference between the reference frequency signal and the feedback frequency signal; a digital loop filter (DLF) that outputs a second digital signal generated by filtering the first digital signal; a multiplier circuit that outputs one of a third digital signal and a final test signal, the third digital signal generated by performing a multiplication operation on the second digital signal using a multiplication coefficient; a digital-controlled oscillator (DCO) that generates an oscillation signal having a frequency based on the output one of the third digital signal and the final test signal; and a loop gain calibrator (LGC) that receives the oscillation signal, generates a pair of test signals, and determines the multiplication coefficient using the pair of test signals.
-
公开(公告)号：US10818209B2
公开(公告)日：2020-10-27
申请号：US16155259
申请日：2018-10-09
Applicant: SAMSUNG ELECTRONICS CO., LTD.
Inventor： Young Chol Lee , Wook-Jae Jeon , Tae Ik Kim , Il Yong Jung , Byoung-Jin Cho , Jun Sung Choi
IPC: G09G3/18 , G02F1/1335 , G02B5/00 , G02F1/135
Abstract: A display apparatus includes a display panel receiving light from a light source. The display panel includes a liquid crystal panel, first and second polarizers respectively disposed on front and rear sides of the liquid crystal panel, and an optical layer disposed on a front surface of the second polarizer. The optical layer includes a first resin layer having light absorption portions for absorbing a portion of incident light, a second resin layer disposed on a front surface of the first resin layer, the second resin layer having a higher refractive index than the first resin layer, the second resin layer having light diffusion portions for diffusing light not absorbed by the light absorption portions.
-
-
-
Search Results
4
records
(took 0.011 seconds)
