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1.发明申请公开(公告)号：US20210080775A1
公开(公告)日：2021-03-18
申请号：US16080208
申请日：2018-06-12
发明人： Wenfang LI , Xianming ZHANG , Dan CAO
IPC分类号： G02F1/1333 , G09G3/36
摘要： Disclosed is a chip temperature control circuit of a liquid crystal display panel, comprising a chip, the temperature of the chip increasing with the increase of power consumption; a thermosensitive element positioned on the chip, the electrical characteristic of thermosensitive element changing in response to change in the temperature of the chip; an analog-to-digital converter which is electrically connected to both ends of the thermosensitive element to obtain an analog voltage signal of the thermosensitive element, the analog-to-digital converter converting the analog voltage signal into a corresponding digital voltage signal; a timing controller which is electrically connected to an output of the analog-to-digital converter and the chip respectively, the timing controller obtaining a corresponding chip temperature according to the digital voltage signal obtained and adjusting the chip to reduce power consumption when the temperature of the chip exceeds a predetermined temperature. The invention also discloses a liquid crystal display panel.
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公开(公告)号：US20190333466A1
公开(公告)日：2019-10-31
申请号：US16247786
申请日：2019-01-15
发明人： Juan ZHOU , Xianming ZHANG
IPC分类号： G09G3/36
摘要： The gamma compensation circuit includes a gamma circuit, a source driver, a TFT, a liquid crystal capacitor, a common voltage circuit, and an adjustment circuit. The gamma circuit has an output terminal connected to an input terminal of the source driver. The source driver has an output an output terminal connected to the source of the TFT. The TFT's drain is connected to a first terminal of the liquid crystal capacitor. The liquid crystal capacitor has a second terminal connected to an output terminal of the common voltage circuit. The adjustment circuit has a first terminal connected to a junction of the output terminal of the gamma circuit and the input terminal of the source driver. The adjustment circuit has a second terminal connected to another junction of the second terminal of the liquid crystal capacitor and the output terminal of the common voltage circuit.
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公开(公告)号：US20160302278A1
公开(公告)日：2016-10-13
申请号：US14370233
申请日：2014-01-17
发明人： Xianming ZHANG
IPC分类号： H05B33/08
CPC分类号： H05B33/0851 , H05B33/0812 , H05B33/0827 , H05B33/0845 , H05B33/086
摘要： An backlight adjustment circuit (20), configured to adjust luminance of light emitted by one light-emitting diode (LED) string (11) of a LED module (10), the LED string (11) includes a plurality of LEDs (D) and a current control resistor (R). The backlight adjustment circuit (20) includes a light sensing circuit (21) for sensing the luminance of one corresponding LED string (11) and producing a corresponding light sensing signal value; a comparison unit (22) for comparing the light sensing signal value with a preset reference value, and producing a first signal when comparing the light sensing signal value is less than the preset reference value, else producing a second signal; and an adjustment unit (23) for decreasing the luminance of the LED string (11) when receiving the first signal and increasing the luminance of the LED string (11) when receiving the second signal.
摘要翻译： 一种背光调整电路（20），其配置为调节LED模块（10）的一个发光二极管（LED）串（11）发出的光的亮度，所述LED串（11）包括多个LED（D） 和电流控制电阻（R）。 背光调整电路（20）包括用于感测一个对应的LED串（11）的亮度的光感测电路（21）并产生相应的光感测信号值; 比较单元（22），用于比较光感测信号值与预置参考值，并且当比较光感测信号值时产生第一信号小于预设参考值，否则产生第二信号; 以及用于当接收到第一信号时降低LED串（11）的亮度并且在接收到第二信号时增加LED串（11）的亮度的调整单元（23）。
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公开(公告)号：US20170261800A1
公开(公告)日：2017-09-14
申请号：US14908093
申请日：2015-09-18
发明人： Xianming ZHANG , Ping-sheng KUO , Ming-wei CHEN
IPC分类号： G02F1/1345 , G09G3/36 , H02H3/08
CPC分类号： G02F1/13454 , G02F1/136204 , G02F2201/50 , G09G3/2096 , G09G3/3611 , G09G3/3648 , G09G2310/08 , G09G2330/04 , G09G2330/12 , H01L27/0248 , H02H3/08
摘要： The present invention provides a protective circuit, employed to protect a liquid crystal display, and the liquid crystal display includes a display panel and a level translator providing a clock signal to the display panel through an output line, and the protective circuit includes a first transistor, a detection circuit and a controller coupled to both the first transistor and the detection circuit, and the first transistor is electrically coupled to the detection circuit and the output line, and the clock signal is outputted to the display panel through the first transistor, and the detection circuit detects the clock signal and determines whether the clock signal is normal or not, and as the clock signal is abnormal, the controller controls the level translator to stop outputting the clock signal to the display panel.
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公开(公告)号：US20170162155A1
公开(公告)日：2017-06-08
申请号：US14787541
申请日：2015-08-21
发明人： Xianming ZHANG , Dan CAO
IPC分类号： G09G3/36
CPC分类号： G09G3/3677 , G09G3/3696 , G09G2300/0809 , G09G2310/0289
摘要： A gate driving circuit and a liquid crystal display are provided, wherein the gate driving circuit comprises a gate pulse modulator and a controlling circuit, the controlling circuit comprises at least one sub controlling circuit; an input terminal of each sub controlling circuit of the at least one sub controlling circuit is connected to an output terminal of the gate pulse modulator; an output terminal of each sub controlling circuit is connected to a power source; the power source outputs a level signal to each sub controlling circuit; each sub controlling circuit controls a conduction between each sub controlling circuit and the gate pulse modulator according to the level signal, so as to control the gate driving circuit to output at least one gate driving voltage. The present disclosure may generate a plurality of gate driving voltages, thereby increasing the display effect of the liquid crystal display.
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公开(公告)号：US20160278175A1
公开(公告)日：2016-09-22
申请号：US14408119
申请日：2014-09-16
发明人： Xianming ZHANG
IPC分类号： H05B33/08
CPC分类号： H05B33/0824 , H05B33/0815 , H05B33/0842 , H05B37/02 , Y02B20/346
摘要： The present invention provides a light source driving circuit and method. The light source driving circuit is used to provide light source driving signals to a light source. The light source driving circuit comprises a light source driving chip, a first pulse width modulation (PWM) signal input terminal, and a first control circuit. The light source driving chip is utilized for generating and outputting the light source driving signals. The first PWM signal input terminal is utilized for receiving a first PWM signal. The first control circuit is utilized for controlling the light source to emit light rays according to the first PWM signal.
摘要翻译： 本发明提供一种光源驱动电路及方法。 光源驱动电路用于向光源提供光源驱动信号。 光源驱动电路包括光源驱动芯片，第一脉冲宽度调制（PWM）信号输入端子和第一控制电路。 光源驱动芯片用于产生和输出光源驱动信号。 第一个PWM信号输入端用于接收第一个PWM信号。 第一控制电路用于根据第一PWM信号控制光源发射光线。
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7.发明申请公开(公告)号：US20180174501A1
公开(公告)日：2018-06-21
申请号：US15118790
申请日：2016-06-08
发明人： Dan CAO , Xianming ZHANG
IPC分类号： G09G3/00 , G09G3/36 , H02H3/08 , H03K17/687 , G05F1/10
CPC分类号： G09G3/006 , G05F1/10 , G09G3/3611 , G09G2310/0264 , G09G2330/00 , G09G2330/04 , G09G2330/08 , H02H3/08 , H03K17/082 , H03K17/687
摘要： The present disclosure proposes an overcurrent orotection circuit of the GOA circuit. A voltage signal from a control signal source of the GOA circuit is converted into a current signal, and then the current signal is amplified. Subsequently, a product of the amplified current signal and a load resistor is compared with a threshold voltage. If the product is larger than the threshold voltage, a controller controls a switch to output a low voltage level signal to ensure that the GOA circuit is at overcurrent protected state. In this way, the panel is prevented from being damaged due to overabundant currents. Besides, the comparison of the amplified current signal is good for decreasing detection difficulties, enhancing precision of a measurement, and lowering risk of operation mistakes. Moreover, 2D and 3D modes in overcurrent protection through different load circuits improve the effect of protection.
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公开(公告)号：US20180108306A1
公开(公告)日：2018-04-19
申请号：US15125959
申请日：2016-07-12
发明人： Wenfang LI , Xianming ZHANG
IPC分类号： G09G3/36
摘要： The present invention provides a method for improving ghost image and a liquid crystal display device using the same, which comprises: providing pixels with data voltage by polarity inversion in frame to frame manner. Wherein when the pixel is written with a positive polarity, a first value is given at a common electrode. and wherein when the pixel is written with a negative polarity, a second value is given with a second value, which is larger than the first value. According to the embodiment of the present invention, a method for improving ghost image and a liquid crystal display device using the same, can prevent or reduce polarization of the liquid crystal and improve ghost image.
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公开(公告)号：US20180045779A1
公开(公告)日：2018-02-15
申请号：US14917006
申请日：2016-01-14
发明人： Dan CAO , Xianming ZHANG
IPC分类号： G01R31/3193 , G01R31/317 , G05F1/625 , H02M1/14
CPC分类号： H02M3/156
摘要： Disclosed is a feedback control circuit and a power management module, wherein the feedback control circuit includes a sample analysis circuit, a comparison circuit and a switch control circuit, and the sample analysis circuit samples an output signal of the power management chip, and analyzes a variation trend of the output signal to obtain a first output signal; the comparison circuit compares the first output signal and a reference signal to obtain a second output signal; the switch control circuit comprises a Pulse Width Modulation PWM control circuit and a switch, wherein the PWM control circuit is coupled to the comparison circuit and the switch control circuit, and the switch is coupled to the power management chip, and the switch control signal adjusts a duty ratio of the switch according to the second output signal to adjust a compensation duration of the output signal of the power management chip.
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公开(公告)号：US20170187183A1
公开(公告)日：2017-06-29
申请号：US14904781
申请日：2015-12-08
发明人： Xianming ZHANG , Yu-Yeh CHEN , Ming-wei CHEN , Dan CAO
CPC分类号： H02H9/046 , H01L27/0255
摘要： The present invention provides a chip and an electronic device. The chip comprises at least one pin, and the chip comprises at least one ESD (Electrostatic Discharge) protection circuit inside, and the ESD protection circuit is employed to reduce or eliminate a damage of electrostatic to other elements or circuit inside the chip, and the ESD protection circuit is located corresponding to a pin, and the ESD protection circuit is electrically coupled to the pin. The electronic device comprises the aforesaid chip.
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