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1. 发明授权

US10373562B2 Gate driving circuit, unit thereof, and display device 有权
公开(公告)号：US10373562B2
公开(公告)日：2019-08-06
申请号：US15568992
申请日：2016-03-25
申请人： Peking University Shenzhen Graduate School
发明人： Shengdong Zhang , Chuanli Leng , Zhijin Hu , Congwei Liao
IPC分类号： G11C19/00 , G09G3/3258 , G09G3/20 , G09G3/36 , G11C19/28
摘要： The present application provides a gate driver circuit comprising at least one cascaded gate driver circuit unit. The low-level-holding enabling terminal of the gate driver circuit unit is connected to an adaptive voltage generating module. The adaptive voltage generating module generates a self-compensating voltage according to its constant current source and transmits to the low-level-holding enabling terminal, so as to provide an effective voltage level to the low-level-holding enabling terminal. Because the threshold voltage shift caused by pulling-down transistors in the low-level-holding module is embodied at the low-level-holding enabling terminal, the adaptive voltage generating module generates a self-compensating voltage with its constant current source according to the threshold voltage to compensate the increase of the threshold voltage. As such, the overdrive voltage of the pulling-down the transistors keep constant which provides good pulling-down performance, and consequently the lifetime of the gate driver circuit is prolonged.

2. 发明申请

US20180144810A1 SHIFT REGISTER, UNIT THEREOF, AND DISPLAY DEVICE 审中-公开
公开(公告)号：US20180144810A1
公开(公告)日：2018-05-24
申请号：US15566608
申请日：2016-03-25
申请人： Peking University Shenzhen Graduate School
发明人： Shengdong Zhang , Zhijin Hu , Congwei Liao , Wenjie Li , Junmei Li , Shijie Cao
IPC分类号： G11C19/28 , G09G3/20
CPC分类号： G11C19/28 , G09G3/20 , G09G3/2092 , G09G3/3648 , G09G3/3674 , G09G3/3677 , G09G2310/0267 , G09G2310/0286 , G09G2310/08
摘要： The present application discloses a shift register and units thereof, wherein low voltage level maintaining module (30) includes: a first maintaining unit (31) and a second maintaining unit (32), configured to maintain a signal output terminal and/or the controlling terminal (Q) of the driving module (20) at low voltage level when an effective level is received. A threshold voltage sensing module (40) is coupled between the first maintaining unit (31) and the second maintaining unit (32), the threshold voltage sensing module (40) is configured to control its signal output terminal to provide an effective level to the second maintain-enabling terminal (P2) according to threshold voltage shift of the first maintaining unit (31) sensed. Therefore, low voltage maintaining module (30) may endure a greater threshold voltage shift, and the life span of the circuit is extended. The present application further discloses a display device and a voltage regulating circuit.

3. 发明授权

US10192474B2 Controllable voltage source, shift register and unit thereof, and display 有权
公开(公告)号：US10192474B2
公开(公告)日：2019-01-29
申请号：US15329143
申请日：2014-11-14
申请人： PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL
发明人： Shengdong Zhang , Congwei Liao , Zhijin Hu , Wenjie Li , Junmei Li
IPC分类号： G11C19/00 , G09G3/20 , G11C19/28 , H02M3/07 , G11C5/14 , G09G3/36
摘要： A controllable voltage source, comprising a control module (1), a storage module (2) and an output module (3); the control module (1) is coupled between a high level end and a low level end; the storage module (2) comprises a storage capacitor; two ends of the storage capacitor are respectively coupled to the control module (1) to form a first terminal and a second terminal; the output module (3) is coupled to the second terminal, and the signal output end thereof is used to output to an external circuit the voltage signal of the controllable voltage source; the control module (1) responds the effective level of a first clock signal so as to enable the first terminal to be coupled to the high level end, and the first terminal is charged from the high level end; the control module (1) responds the effective level of a second clock signal so as to enable the second terminal to be coupled to the high level end, and the second terminal is charged from the high level end; and the first terminal is coupled to the low level end and discharges via the low level end. The effective level of the first clock signal does not overlap with the effective level of the second clock signal. Also disclosed are a shift register and unit thereof, and display based on the controllable voltage source.

4. 发明申请

US20180130415A1 GATE DRIVING CIRCUIT, UNIT THEREOF, AND DISPLAY DEVICE 审中-公开
公开(公告)号：US20180130415A1
公开(公告)日：2018-05-10
申请号：US15568992
申请日：2016-03-25
申请人： Peking University Shenzhen Graduate School
发明人： Shengdong Zhang , Chuanli Leng , Zhijin Hu , Congwei Liao
IPC分类号： G09G3/3258 , G11C19/28 , G09G3/36
CPC分类号： G09G3/3258 , G09G3/20 , G09G3/3677 , G09G3/3696 , G09G2310/0267 , G09G2310/0286 , G11C19/28
摘要： The present application provides a gate driver circuit comprising at least one cascaded gate driver circuit unit. The low-level-holding enabling terminal of the gate driver circuit unit is connected to an adaptive voltage generating module. The adaptive voltage generating module generates a self-compensating voltage according to its constant current source and transmits to the low-level-holding enabling terminal, so as to provide an effective voltage level to the low-level-holding enabling terminal. Because the threshold voltage shift caused by pulling-down transistors in the low-level-holding module is embodied at the low-level-holding enabling terminal, the adaptive voltage generating module generates a self-compensating voltage with its constant current source according to the threshold voltage to compensate the increase of the threshold voltage. As such, the overdrive voltage of the pulling-down the transistors keep constant which provides good pulling-down performance, and consequently the lifetime of the gate driver circuit is prolonged.

5. 发明授权

US10255983B2 Shift register, unit thereof, and display device 有权
公开(公告)号：US10255983B2
公开(公告)日：2019-04-09
申请号：US15566608
申请日：2016-03-25
申请人： Peking University Shenzhen Graduate School
发明人： Shengdong Zhang , Zhijin Hu , Congwei Liao , Wenjie Li , Junmei Li , Shijie Cao
IPC分类号： G11C19/00 , G11C19/28 , G09G3/20 , G09G3/36
摘要： The present application discloses a shift register and units thereof, wherein low voltage level maintaining module (30) includes: a first maintaining unit (31) and a second maintaining unit (32), configured to maintain a signal output terminal and/or the controlling terminal (Q) of the driving module (20) at low voltage level when an effective level is received. A threshold voltage sensing module (40) is coupled between the first maintaining unit (31) and the second maintaining unit (32), the threshold voltage sensing module (40) is configured to control its signal output terminal to provide an effective level to the second maintain-enabling terminal (P2) according to threshold voltage shift of the first maintaining unit (31) sensed. Therefore, low voltage maintaining module (30) may endure a greater threshold voltage shift, and the life span of the circuit is extended. The present application further discloses a display device and a voltage regulating circuit.

6. 发明授权

US09886050B2 Adaptive voltage source, shift register and unit thereof, and display 有权
公开(公告)号：US09886050B2
公开(公告)日：2018-02-06
申请号：US15126929
申请日：2014-11-14
申请人： PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL
发明人： Shengdong Zhang , Congwei Liao , Zhijin Hu , Wenjie Li , Junmei Li
IPC分类号： G09G3/20 , G05F1/625 , G11C19/18
CPC分类号： G05F1/625 , G09G3/20 , G09G3/2092 , G09G2300/0408 , G09G2310/0267 , G09G2310/0275 , G09G2310/0286 , G09G2310/0289 , G09G2310/08 , G09G2330/021 , G11C19/184
摘要： An adaptive voltage source, comprising a signal output end, and a reference resistance forming circuit and a sensing module connected in series between a voltage source and a low power level; the sensing module comprises a sensing end coupled to a transistor to be sensed to sense the threshold voltage drift of the transistor to be sensed in a device circuit; the equivalent resistance of the sensing module increases with the increase of the sensed threshold voltage drift; and the signal output end is coupled to a first node coupled to the reference resistance forming circuit and the sensing module, and is used to output adaptive voltage. The output adaptive voltage is adjusted via the threshold voltage drift sensed by the sensing module. Based on the circuit, also disclosed are a shift register and unit thereof, and display.

7. 发明申请

US20160043227A1 THIN FILM TRANSISTOR AND MANUFACTURING METHOD THEREOF 审中-公开
标题翻译：薄膜晶体管及其制造方法
公开(公告)号：US20160043227A1
公开(公告)日：2016-02-11
申请号：US14762521
申请日：2013-11-11
申请人： PEKING UNIVERSITY SHENZHEN GRADUATE SCHOOL
发明人： Shengdong Zhang , Yang Shao , Xin He , Xiang Xiao
IPC分类号： H01L29/786 , H01L21/477 , H01L21/461 , H01L21/465 , H01L29/66 , H01L29/423
CPC分类号： H01L29/7869 , H01L21/461 , H01L21/465 , H01L21/467 , H01L21/477 , H01L29/42384 , H01L29/66969
摘要： A method of manufacturing a thin film transistor, comprising: forming a gate electrode (2) on a first surface of a substrate (1); forming on the first surface of the substrate a gate dielectric layer (3) covering the gate electrode; forming a metal oxide semiconductor layer (4) on the gate dielectric layer; processing the metal oxide semiconductor layer to form a channel region (5) exposed thereon; anode-oxidizing the channel region, such that the channel region has a first carrier concentration; and conducting photolithography and etching the metal oxide semiconductor layer to form an active region, the active region comprising the channel region, and a source region (6) and a drain region (7) located at the two sides of the channel region and having a second carrier concentration, the first carrier concentration being lower than the second carrier concentration. The source region, the drain region and the channel region of a thin film transistor manufactured using the above method are located on the same film layer, and the channel region has a carrier concentration lower than the carrier concentration of the source region and the drain region.
摘要翻译：一种制造薄膜晶体管的方法，包括：在基板（1）的第一表面上形成栅电极（2）; 在所述基板的第一表面上形成覆盖所述栅电极的栅介质层（3）; 在所述栅极电介质层上形成金属氧化物半导体层（4）; 处理所述金属氧化物半导体层以形成在其上暴露的沟道区域（5）; 阳极氧化沟道区，使得沟道区具有第一载流子浓度; 并且对所述金属氧化物半导体层进行光刻和蚀刻以形成有源区，所述有源区包括所述沟道区，以及位于所述沟道区的两侧的源区（6）和漏区（7），并且具有第二载流子浓度，第一载流子浓度低于第二载流子浓度。使用上述方法制造的薄膜晶体管的源极区域，漏极区域和沟道区域位于同一膜层上，并且沟道区域的载流子浓度低于源区域和漏极区域的载流子浓度。

8. 发明授权

US10679554B2 Pixel circuit with compensation for drift of threshold voltage of OLED, driving method thereof, and display device 有权
公开(公告)号：US10679554B2
公开(公告)日：2020-06-09
申请号：US15569027
申请日：2016-03-25
申请人： Peking University Shenzhen Graduate School
发明人： Shengdong Zhang , Xue Meng , Chuanli Leng
IPC分类号： G09G3/3233 , G09G3/3258 , H01L51/52 , G09G3/32
摘要： Provided is a pixel circuit. The pixel circuit comprises a driving transistor and a light-emitting element both coupled in series between a first level end and a second level end, and comprises a second transistor, a third transistor, a fourth transistor, a first capacitor and a second capacitor. The second capacitor is coupled between a control electrode of the driving transistor and a second end of the light-emitting element. A threshold voltage is stored by the first capacitor, so that threshold voltage compensation for the driving transistor and the light-emitting element is implemented, and therefore the non-uniformity of the display of the pixel circuit is compensated. Also provided is a display device, wherein a first control line and a light-emitting control line are both global lines. Also disclosed is a pixel circuit driving method.

9. 发明授权

US10089917B2 Photoelectric sensor and display panel 有权
公开(公告)号：US10089917B2
公开(公告)日：2018-10-02
申请号：US15572317
申请日：2016-03-24
申请人： Peking University Shenzhen Graduate School
发明人： Shengdong Zhang , Congwei Liao , Zhijin Hu , Shijie Cao , Junmei Li , Wenjie Li
IPC分类号： G02F1/01 , G09G3/20 , H01L29/66 , H01L27/12 , G06F3/041
摘要： A photoelectric sensor and a display panel comprise: a pulse transmission unit comprising a control node, after obtaining a driving voltage, the control node of the pulse transmission unit transmitting first clock signals to a signal output terminal; a pulse control unit configured to receive scanning signals from a signal input terminal and charging the control node of the pulse transmission unit so as to provide the driving voltage; and photoelectric sensing unit configured to provide a leakage current in response to the intensity of external illumination when receiving the external illumination, the leakage current discharging the control node of the pulse transmission unit, so that the voltage at the control node of the pulse transmission unit is less than the driving voltage after a period of time. The circuit of the photoelectric sensor utilizes the existing scanning signals and clock signals of a conventional display panel, with no need for an extra control signal, and therefore the circuit is simple in structure, and more suitable for being integrated on the display panel.

10. 发明申请

US20180130412A1 PIXEL CIRCUIT, DRIVING METHOD THEREFOR, AND DISPLAY DEVICE 审中-公开
公开(公告)号：US20180130412A1
公开(公告)日：2018-05-10
申请号：US15569027
申请日：2016-03-25
申请人： Peking University Shenzhen Graduate School
发明人： Shengdong Zhang , Xue Meng , Chuanli Leng
IPC分类号： G09G3/3233 , G09G3/3258 , H01L51/52
摘要： Provided is a pixel circuit. The pixel circuit comprises a driving transistor and a light-emitting element both coupled in series between a first level end and a second level end, and comprises a second transistor, a third transistor, a fourth transistor, a first capacitor and a second capacitor. The second capacitor is coupled between a control electrode of the driving transistor and a second end of the light-emitting element. A threshold voltage is stored by the first capacitor, so that threshold voltage compensation for the driving transistor and the light-emitting element is implemented, and therefore the non-uniformity of the display of the pixel circuit is compensated. Also provided is a display device, wherein a first control line and a light-emitting control line are both global lines. Also disclosed is a pixel circuit driving method.

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