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公开(公告)号：US12062329B2
公开(公告)日：2024-08-13
申请号：US18139682
申请日：2023-04-26
发明人： Yu-Sheng Ma , Jhih-Siou Cheng , Chun-Fu Lin
IPC分类号： G09G3/32
CPC分类号： G09G3/32 , G09G2300/06 , G09G2310/0202 , G09G2310/0272 , G09G2320/0233 , G09G2330/025
摘要： A source driver and a driving system for driving an LED panel, and an LED display system are provided. The driving system includes: a plurality of source drivers, for respectively supplying driving currents to channels of different portions on the LED panel, and each source driver includes: a plurality of driving circuits, which are in one-to-one correspondence with the plurality of channels on the LED panel, and are connected to a same current control line, each driving circuit being configured to supply a driving current to a corresponding channel, wherein, the supplied driving current is associated with a voltage on the current control line which the driving circuit is connected with. When one or more driving circuits switch between a non-driving state and a driving state, the driving current being supplied by the driving circuit(s) being in the driving state in the plurality of source drivers is compensated.
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公开(公告)号：US20230005441A1
公开(公告)日：2023-01-05
申请号：US17855606
申请日：2022-06-30
发明人： Jhih-Siou Cheng , Hung-Ho Huang , Kang-Fan Yeh , Po-Hsiang Fang
摘要： A backlight driving device and an operating method thereof are provided to drive multiple backlight zones of a backlight panel. The backlight driving device includes an interface circuit and a driving circuit. The interface circuit receives main backlight data corresponding to a first backlight zone from a former stage device. The driving circuit drives the first backlight zone according to a main current level in a display refresh period of a backlight frame period, does not drive the first backlight zone in a demotion blur period which is prior to the display refresh period, and drives the first backlight zone according to a compensation current level in a vertical blanking period which succeeds the display refresh period. The driving circuit determines the main current level according to the main backlight data, and the compensation current level is lower than the main current level.
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公开(公告)号：US11515239B2
公开(公告)日：2022-11-29
申请号：US17169553
申请日：2021-02-08
发明人： Hong-Dyi Chang , Tai-Hung Lin , Jhih-Siou Cheng
IPC分类号： H01L23/495 , H01L23/00 , H01L23/31
摘要： A quad flat no-lead (QFN) package structure including a lead frame, a semiconductor die, and an encapsulating material. The lead frame includes a die pad and a plurality of contacts surrounding the die pad. The semiconductor die is disposed on the die pad and electrically connected to the plurality of contacts, wherein a shortest distance between the semiconductor die and a first side of the die pad is shorter than a shortest distance between the semiconductor die to a second side of the die pad, and the first side is opposite to the second side. The encapsulating material encapsulates the lead frame and the semiconductor die and partially exposing the plurality of contacts, wherein an aspect ratio of the QFN package is substantially equal to or greater than 3.
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公开(公告)号：US20220375403A1
公开(公告)日：2022-11-24
申请号：US17881404
申请日：2022-08-04
发明人： Jhih-Siou Cheng , Chun-Fu Lin , Po-Hsiang Fang , Ju-Lin Huang
IPC分类号： G09G3/32
摘要： The present disclosure relates to a driving method for a display device and a display device. The display device includes a display driver, the display driver includes a plurality of driving channels each of which drives corresponding display unit according to display data in a pulse width modulation manner within one frame period, the method comprises: selectively enabling, in each sub-frame subset among a plurality of different sub-frame subsets of the frame period, different channel subset among a plurality of channel subsets of the plurality of driving channels to drive corresponding display unit, wherein each channel subset of the plurality of channel subsets includes two or more driving channels among the plurality of driving channels.
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公开(公告)号：US20220343837A1
公开(公告)日：2022-10-27
申请号：US17726558
申请日：2022-04-22
发明人： Jhih-Siou Cheng , Chun-Fu Lin , Tung-Shuan Cheng , Po-Hsiang Fang , Ju-Lin Huang
IPC分类号： G09G3/32
摘要： A display driver for driving a display device including a pixel array is provided. The display driver includes a plurality of driving channels. The driving channels is configured to output driving signals in a pulse width modulation manner to drive the pixel array to illuminate in a first frame period which is being divided into a plurality of subframe periods. A first driving channel of the plurality of driving channels outputs a first driving signal in a first subframe period combination. A second driving channel of the plurality of driving channels outputs a second driving signal in a second subframe period combination different than the first subframe period combination. Each of the first subframe period combination and the second subframe period combination comprises at least one subframe period of the first frame period.
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公开(公告)号：US20220122552A1
公开(公告)日：2022-04-21
申请号：US17467443
申请日：2021-09-06
发明人： Chun-Fu Lin , Hsing-Kuo Chao , Jhih-Siou Cheng , Ju-Lin Huang , Wen-Hsin Cheng
IPC分类号： G09G3/34 , G02F1/1335 , G02F1/13357
摘要： An LED backlight driver includes at least one driving chip configured to drive a backlight module. The at least one driving chip is disposed on at least one chip-on-film package, and not in direct contact with the backlight module to reduce heat transfer to the backlight module.
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公开(公告)号：US20220122521A1
公开(公告)日：2022-04-21
申请号：US17074639
申请日：2020-10-20
发明人： Yi-Yang Tsai , Chun-Fu Lin , Po-Hsiang Fang , Jhih-Siou Cheng
IPC分类号： G09G3/32 , H05B45/325
摘要： A driving device and a driving method of a display panel are provided. The driving device includes a current source and a control circuit. The current source makes a driving current flow through a light-emitting element path of a sub-pixel circuit of the display panel. During a display line period, the driving current has a normal current amount, and the control circuit controls a first switch in the light-emitting element path to adjust a duty cycle of the driving current in the light-emitting element path. During a sensing period, the driving current has a sensing current amount less than the normal current amount, the control circuit turns on the first switch, and the control circuit checks a voltage in the light-emitting element path to determine whether a light-emitting element in the light-emitting element path is open (or whether the light-emitting element is provided in the light-emitting element path).
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公开(公告)号：US11295671B2
公开(公告)日：2022-04-05
申请号：US16827713
申请日：2020-03-24
发明人： Jhih-Siou Cheng , Po-Hsiang Fang , Chieh-An Lin , Keko-Chun Liang , Ju-Lin Huang
IPC分类号： G09G3/3258
摘要： A display driver and a display driving method are provided. The display driving is adapted for driving a display panel and sensing an electrical characteristic of the display panel. The display driver includes a first amplifier circuit. The first amplifier circuit is coupled to the display panel. The first amplifier circuit includes a first driving circuit, a first sensing circuit and a first operational amplifier. The first operational amplifier is coupled to the display panel through a first driving line and a first sensing line. The first driving circuit is configured to provide a first driving signal to the display panel through the first operational amplifier and the first driving line during a driving period. The first sensing circuit is configured to receive a first sensing signal from the display panel through the first operational amplifier and the first sensing line during a first sensing period.
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9.发明授权公开(公告)号：US11276346B2
公开(公告)日：2022-03-15
申请号：US16253171
申请日：2019-01-21
发明人： Jin-Yi Lin , Chieh-An Lin , Jhih-Siou Cheng , Ju-Lin Huang
IPC分类号： G09G3/36 , G09G3/3225 , G11C27/02 , H03F3/45 , H03K3/356
摘要： A sensing circuit for an organic light-emitting diode driver includes a sample and hold circuit and a gain amplifier. The sample and hold circuit is configured to sample a sensing signal received via an input terminal. The gain amplifier is coupled to the sample and hold circuit. The sample and hold circuit includes a first capacitor, a second capacitor, a first switch, a second switch, a third switch and a fourth switch. The first capacitor is coupled between the input terminal and the gain amplifier. The second capacitor is coupled between a reference terminal and the gain amplifier. The first switch is connected between the first capacitor and the input terminal. The second switch is connected between the second capacitor and the reference terminal. The third switch is connected between the first capacitor and the gain amplifier. The fourth switch is connected between the second capacitor and the gain amplifier.
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公开(公告)号：US20220020673A1
公开(公告)日：2022-01-20
申请号：US17169553
申请日：2021-02-08
发明人： Hong-Dyi Chang , Tai-Hung Lin , Jhih-Siou Cheng
IPC分类号： H01L23/495 , H01L23/31 , H01L23/00
摘要： A quad flat no-lead (QFN) package structure including a lead frame, a semiconductor die, and an encapsulating material. The lead frame includes a die pad and a plurality of contacts surrounding the die pad. The semiconductor die is disposed on the die pad and electrically connected to the plurality of contacts, wherein a shortest distance between the semiconductor die and a first side of the die pad is shorter than a shortest distance between the semiconductor die to a second side of the die pad, and the first side is opposite to the second side. The encapsulating material encapsulates the lead frame and the semiconductor die and partially exposing the plurality of contacts, wherein an aspect ratio of the QFN package is substantially equal to or greater than 3.
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