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1. 发明授权

US10332469B2 GOA circuit over-current protection system and method thereof 有权
公开(公告)号：US10332469B2
公开(公告)日：2019-06-25
申请号：US15569389
申请日：2017-07-13
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Wenfang Li , Xianming Zhang
IPC分类号： G09G3/36
摘要： The present invention provides a GOA circuit over-current protection system and method thereof. The over-current protection system for a GOA circuit, which comprises a power management chip and a level-shift chip. The level-shift chip comprises an over-current protection module. The over-current protection module comprises a current comparator, an AND gate circuit, a rising edge pulse delay circuit, a power supply, a voltage comparator, a first switch and a second switch, and a capacitor. With the current comparator to detect a current on the wiring of the clock signal in the GOA circuit, when the current on the wiring of the clock signal in the GOA circuit is too high, the power supply is controlled for charging the capacitor. With the voltage comparator to detect both ends of the capacitor (the first node voltage), when the first node voltage is too high, an over-current protection control signal is outputted to the power supply management chip to control the power management chip to stop supplying power to the GOA circuit, to perform an over-current protection of the GOA circuit, to avoid the melted phenomenon caused by the short circuit of the GOA circuit.

2. 发明授权

US10319330B2 Flicker control circuits for liquid crystal devices 有权
公开(公告)号：US10319330B2
公开(公告)日：2019-06-11
申请号：US15312629
申请日：2016-09-27
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Wenfang Li , Xianming Zhang , Xinhong Chen
IPC分类号： G09G3/36 , G05F3/08
摘要： A flicker control circuit of liquid crystal devices (LCDs) includes a main control chip, a low differential voltage regulator (LDO) circuit, a first resistor, a second resistor, and a reset resistor. The main control chip includes an operational voltage input end, a common voltage output end, and a dividing reference voltage input end. The LDO circuit receives a voltage provided by an external power module and generates a dividing reference voltage in accordance with the received voltage. One end of the first resistor connects to the LDO circuit to receive the dividing reference voltage, and the other end of the first resistor connects to the dividing reference voltage input end. The flicker of the LCDs may be reduced such that the display performance of the LCDs may be enhanced.

3. 发明授权

US10186222B2 Level shift circuit and display panel having the same 有权
公开(公告)号：US10186222B2
公开(公告)日：2019-01-22
申请号：US15128217
申请日：2016-07-05
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Xianming Zhang
IPC分类号： G09G3/00 , G11C19/00 , G09G3/36
摘要： A level shift circuit in a gate driver on array circuit and a display panel. The level shift circuit includes a timing controller and a level shift chip. The timing controller includes a starting signal pin. The level shift chip includes a storing module and an operational amplifying module. The storing module stores initialization values. The timing controller is connected to the level shift chip via the starting signal pin. The timing controller is configured to send a starting signal to the operational amplifying module via the starting signal pin. The operational amplifying module is configured to be triggered to generate a plurality of timing signals based on the starting signal according to the initialization values in the storing module, and send the plurality of timing signals to a display circuit of the display panel.

4. 发明授权

US10102818B2 Liquid crystal display 有权
公开(公告)号：US10102818B2
公开(公告)日：2018-10-16
申请号：US14908250
申请日：2016-01-13
申请人： SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
发明人： Pingsheng Kuo , Xianming Zhang , Liwei Chu
IPC分类号： G09G3/36
摘要： An LCD includes a substrate, gate on array (GOA) units connected in series, a controller, a level shifter, and an over-current protection circuit. The substrate includes a pixel array section and a circuit arrangement section. The GOA units are used for outputting a scanning signal to the pixel array section based on voltage levels of clock signals and a voltage level of a start signal. The controller generates the clock signals and the start signal. The level shifter adjusts the voltage levels of the clock signals and the voltage level of the start signal. The over-current protection circuit outputs an adjusting signal to the controller to turn off the LCD when a magnitude of one of the plurality of clock signals is over a predetermined value. Therefore, the LCD is turned off for a while, preventing from being burnt out.

5. 发明授权

US10014762B2 Protection circuit 有权
公开(公告)号：US10014762B2
公开(公告)日：2018-07-03
申请号：US14785845
申请日：2015-08-21
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Xianming Zhang , Dan Cao
IPC分类号： H02M1/32 , H02M3/06 , H02M3/15
CPC分类号： H02M1/32 , H02M3/06 , H02M3/15
摘要： The invention provides a protection circuit applied in an inductive boost converter, the inductive boost converter includes a transmission circuit and a charging circuit, the protection circuit includes a detection circuit and a control circuit, an input terminal of the detection and an output terminal of the transmission circuit are connected, a first output terminal of the detection circuit and an input terminal of the charging circuit are connected, a second output terminal of the detection circuit and an input terminal of the control terminal are connected; the detection circuit detects whether an input current from the transmission circuit is a short-circuit current, if the circuit is shorted, the result will be sent to the control circuit, the control circuit cuts the connection of the charging circuit and ground, which can prevent charges stored in the charging circuit from flowing backward into the input terminal of the inductive boost converter.

6. 发明授权

US09747845B2 Backlight control circuit, electronic device and display panel driving method 有权
公开(公告)号：US09747845B2
公开(公告)日：2017-08-29
申请号：US14413150
申请日：2014-01-17
申请人： SHENZHEN CHINA STAR OPTOELECTRONICS TECHNOLOGY CO., LTD.
发明人： Hua Zhang , Xianming Zhang
IPC分类号： G09G3/36 , G09G3/34 , H05B33/08 , H05B37/02 , H04N13/04 , G09G3/00
CPC分类号： G09G3/3413 , G09G3/003 , G09G3/3406 , G09G3/342 , G09G2310/0237 , G09G2320/0209 , H04N13/30 , H05B33/0827 , H05B37/029
摘要： A display panel driving method for driving a LED module of an electronic device to emit light, the method includes steps: controlling to scan a left-eye image and a right-eye image when the electronic device works at a 3D mode (S401); controlling the LED module to turn off and does not emits light during a predetermined period less than a scanning time of the left-eye image or the right-eye image, after switching to scan the left-eye image and the right-eye image (S402); and controlling the LED module to turn on and emit light after the predetermined period has passed (S403). The present invention also provides a backlight control circuit and an electronic device, the present invention capable of controlling the backlight module to emit light via the same signal and do not cause the interference between different signals.

7. 发明授权

US09640132B2 Liquid crystal display panel and liquid crystal display apparatus having the same 有权
公开(公告)号：US09640132B2
公开(公告)日：2017-05-02
申请号：US14655338
申请日：2015-04-16
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Xianming Zhang , Dan Cao
IPC分类号： G09G3/36
CPC分类号： G09G3/3696 , G09G3/3622 , G09G3/3692
摘要： A liquid crystal display panel is disclosed and has a driving circuit, a plurality of data lines, a plurality of scanning lines, and a plurality of pixel units. The driving circuit further includes a programmable DC current source being used to output a corresponding shaping electric current according to a reference voltage, and a shaping resistor being used to generate a corresponding shaping voltage according to the outputted shaping electric current. A liquid crystal display apparatus is also disclosed. The apparatus is able to output shaping voltages with different voltage levels at the same time, thus having a better 3D display effect.

8. 发明授权

US09310644B2 Liquid crystal display, LED backlight source, and the driving method thereof 有权
标题翻译：液晶显示器，LED背光源及其驱动方法
公开(公告)号：US09310644B2
公开(公告)日：2016-04-12
申请号：US13877167
申请日：2013-03-13
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Anle Hu , Xianming Zhang , Hua Zhang
IPC分类号： H05B37/02 , G02F1/1335 , H05B33/08
CPC分类号： G02F1/133603 , G02F2001/133612 , H05B33/0812 , H05B33/0815
摘要： A liquid crystal display, a LED backlight source and the driving method thereof are disclosed. The LED backlight source includes a DC voltage input for inputting DC voltage, a boost circuit for increasing the voltage of the DC input and outputting the boosted DC voltage, a LED strip and a constant current driving circuit. The LED strip includes a plurality of serially connected LEDs and a first resistor (R1). The power consumption of the first MOS is reduced when the LEDs are driven. As such, the power consumption of the constant current driving circuit is reduced, so does the temperature. In this way, the energy conversion efficiency of the driving circuit of the LED backlight source is enhanced, and components within the constant current driving circuit are prevented from being burned out.
摘要翻译：公开了液晶显示器，LED背光源及其驱动方法。 LED背光源包括用于输入DC电压的DC电压输入，用于增加DC输入的电压并输出升压的DC电压的升压电路，LED条和恒流驱动电路。 LED条包括多个串联LED和第一电阻（R1）。当驱动LED时，第一MOS的功耗降低。因此，恒流驱动电路的功耗降低，温度也降低。以这种方式，提高了LED背光源的驱动电路的能量转换效率，并且防止恒流驱动电路内的部件被烧毁。

9. 发明授权

US09230512B2 LED backlight driving circuit and liquid crystal device 有权
标题翻译： LED背光驱动电路和液晶装置
公开(公告)号：US09230512B2
公开(公告)日：2016-01-05
申请号：US14346962
申请日：2014-01-15
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Xianming Zhang
IPC分类号： H05B37/02 , G09G5/10 , H05B33/08 , G09G3/36
CPC分类号： G09G5/10 , G09G3/3406 , G09G3/36 , G09G2330/027 , H05B33/0815 , H05B37/02
摘要： A LED backlight driving circuit is disclosed. The LED backlight driving circuit includes a boost circuit for converting an input voltage to an output voltage for a LED unit, a driving IC for controlling the boost circuit such that the boost circuit converts the input voltage to the output voltage for the LED unit, a discharging module for releasing charges stored within the boost circuit after the driving circuit is turned off, and a detecting module for detecting a voltage at an output end of the boost circuit and then for generating enable signals for controlling the operations of the driving IC. The LED backlight driving circuit is capable of detecting a discharging state of the boost circuit after being quickly rebooted. The driving circuit can be rebooted only if the output voltage is smaller than a reference voltage as the charges stored within the boost circuit is released. As such, the flashing issue is avoided. In addition, the liquid crystal device including the above LED backlight driving circuit is also disclosed.
摘要翻译：公开了一种LED背光驱动电路。 LED背光驱动电路包括用于将输入电压转换为LED单元的输出电压的升压电路，用于控制升压电路的驱动IC，使得升压电路将输入电压转换为LED单元的输出电压，放电模块，用于释放在驱动电路关闭之后存储在升压电路内的电荷;以及检测模块，用于检测升压电路的输出端的电压，然后产生用于控制驱动IC的操作的使能信号。 LED背光驱动电路能够快速重新启动后检测升压电路的放电状态。只有当释放了升压电路中存储的电荷时，只有当输出电压小于参考电压时才能重新启动驱动电路。因此，避免闪烁的问题。此外，还公开了包括上述LED背光驱动电路的液晶装置。

10. 发明申请

US20150294615A1 Light Source Driving Circuit of Light Emitting Semiconductor and Backlight Module 有权
标题翻译：发光半导体和背光模块的光源驱动电路
公开(公告)号：US20150294615A1
公开(公告)日：2015-10-15
申请号：US13985642
申请日：2013-06-25
申请人： Shenzhen China Star Optoelectronics Technology Co., Ltd.
发明人： Hua Zhang , Xianming Zhang
IPC分类号： G09G3/32 , H04N13/04
CPC分类号： G09G3/32 , G09G3/003 , G09G3/3406 , G09G2310/08 , G09G2320/0233 , G09G2320/0252 , G09G2320/0626 , G09G2330/02 , G09G2330/028 , H04N13/359 , H05B33/0818 , H05B33/0845
摘要： A light source driving circuit of light emitting semiconductor and a backlight module are provided. The light source driving circuit of light emitting semiconductor includes a driving control circuit and a constant current driving circuit coupled to the driving control circuit for controlling a current flowing through the light emitting semiconductor. When the driving control circuit receives a display-mode-switch signal which has an indication for switching from a present display mode to a new display mode, the driving control circuit controls the constant current driving circuit such that in the process of switching from the present display mode to the new display mode, the current flowing through the light emitting semiconductor changes gradually.
摘要翻译：提供了发光半导体的光源驱动电路和背光模块。发光半导体的光源驱动电路包括驱动控制电路和连接到驱动控制电路的恒流驱动电路，用于控制流过发光半导体的电流。当驱动控制电路接收到具有从当前显示模式切换到新显示模式的指示的显示模式切换信号时，驱动控制电路控制恒流驱动电路，使得在从当前切换的过程中显示模式到新的显示模式，流经发光半导体的电流逐渐变化。

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