Shenzhen China Star Optoelectronics Technology Co., Ltd.

Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd.

Other

Tcl China Star Optoelectronics Technology Co., Ltd.

Shenzhen China Star Optoelectronics Co., Ltd

Semiconductor Display Technology Co., Ltd.

Optoelectronics Technology Co., Ltd

Shenzhen China Star

Shenzhen China Star Optoelectronics

Xianming Zhang

Dan Cao

Hua Zhang

Xiang Yang

Wenfang Li

Anle Hu

Xinhong Chen

Liwei Chu

Pingsheng Kuo

Yujia Liu

Yu-Hua Chang

A data signal regulating circuit and a display device are disclosed. The data signal regulating circuit is applied to a display panel including a plurality of source driver groups, a feedback unit and an regulating unit. Any two adjacent ones of the source driver groups are provided with a data signal regulating circuit. The feedback unit is used to output a feedback signal to the regulating unit according to data signal difference between two adjacent source driver groups. The regulating unit is used to regulate the data signals output from the corresponding source driver groups according to the feedback signal.

Data signal regulating circuit and display device

An output voltage regulating circuit includes a PWM IC, a voltage regulating speed control unit, a first n-type switch unit, a first capacitor, a resistor unit, and a voltage output unit, wherein the voltage regulating speed control unit includes a second switch unit, a second capacitor, a current source, and a comparator; when the PWM IC receives a signal to increase or decrease the output voltage, the PWM IC correspondingly controls the voltage output unit to increase or decrease the output voltage, and simultaneously controls the second switch unit to turn on and then cut off such that the voltage at the first terminal of the second capacitor is gradually increased, and before increasing to the reference voltage, the comparator outputs a high voltage level to turn on the first n-type switch unit such that the compensation terminal of the PWM IC is directly connected to the first capacitor.

Output voltage regulating circuit and liquid crystal display device

The present disclosure discloses a level shifter circuit and a display panel. The level shifter circuit includes a level shifter module, a compare module connected to the level shifter module. The level shifter module includes a level shifter unit, a control unit connected to the level shifter unit. The level shifter unit receives a first voltage signal and a second voltage signal and generates a level shifter result signal according to the first voltage signal and the second voltage signal. The compare module is configured to compare a voltage corresponding to the level shifter result signal with a reference voltage at a predetermined time and generate a comparison result. The control unit stops the shifter unit when the voltage corresponding to the level shifter result signal is less than the reference voltage. The present disclosure prevents the display panel from being damaged by short circuiting.

Level shifter circuit and display panel

The present application discloses a display panel, including a display body and a plurality of driving modules including a driving unit electrically connected to the display body; wherein at least a part of the driving modules further includes a voltage conversion unit, an input terminal of the voltage conversion unit is connected to a high-potential power supply voltage, and an output terminal of the voltage conversion unit is electrically connected to an input terminal of the driving unit to provide a preset driving voltage for the driving unit.

Display panel

The present disclosure proposes an overcurrent protective circuit and a display panel. The overcurrent protective circuit includes a power supply circuit, a logic algorithm circuit, and an overcurrent protective circuit. The logic algorithm circuit is additionally arranged in the overcurrent protective circuit. The logic algorithm circuit set different threshold currents of overcurrent protection for the display panel according on different driving frequencies. The overcurrent protective circuit adjusts the protective components inside the overcurrent protective circuit in accordance with the set threshold currents. Therefore, the display panel is protected by the overcurrent protective circuit at different frequencies.

Overcurrent protective circuit and display panel

A gate driver on array (GOA) driving circuit including a power management IC and a level shifter circuit connected in order, wherein the level shifter circuit at least includes a first switch transistor, a second switch transistor, a detection unit, and a clock signal output terminal, the first switch transistor is connected to the second switch transistor, and the clock signal output terminal is configured to connect to the GOA circuit, and wherein the detection unit is connected to the first switch transistor and the second switch transistor respectively, configured to detect power consumption of the first switch transistor and the second switch transistor and feedback a detection result that is configured to control an on/off state of a signal output of the power management IC.

GOA driving circuit and display device

The utility model relates to a voltage conditioning circuit, and particularly relates to an AD voltage conditioning circuit. The conditioning circuit comprises a voltage-dividing circuit and a voltage translation circuit. The voltage-dividing circuit and the voltage translation circuit share an output end. The voltage-dividing circuit and the voltage translation circuit are integrated together and share the output end so that the voltage-dividing circuit and the voltage translation circuit can be isolated without using an isolation circuit, AD voltage can be conditioned to an appropriate value, three arithmetic units required to be used by an original conditioning circuit is reduced to only two arithmetic units, and four resistors required to be used by the voltage-dividing circuit and the translation circuit of the original conditioning circuit are reduced to only three resistors. Therefore, the circuit is simplified, cost is greatly reduced and assembling efficiency of circuit boards is enhanced in batch production.

Common voltage feedback compensation circuit, method, and flat display device

A liquid crystal panel driving circuit is provided. The circuit includes a pulse width modulation integrated circuit, including an input terminal, a first resistor, a second resistor, a comparator, a light-emitting diode, a latch, a RC circuit and a power supply voltage. Wherein the input terminal is connected to a ground terminal through the first resistor and the second resistor which are serially connected, a positive input terminal of the comparator is connected to a reference voltage, and a negative input terminal of the comparator is connected between the first resistor and the second resistor, an anode of the light-emitting diode is connected to an output terminal of the comparator, and a cathode of the light-emitting diode is connected to the latch, and an input terminal and an output terminal of the RC circuit are respectively connected to the power supply voltage and the latch.

Liquid crystal panel driving circuit and liquid crystal panel

Disclosed is a liquid crystal display, including: a timing controller, including a reset pin, a reset auxiliary pin, a charging circuit and a charging control circuit; a reset pin circuit; a reset auxiliary pin circuit, of which a reset auxiliary pin is externally connected to a first end of a second resistor and a first end of a second capacitor, and a second end of the second resistor and a second end of the second capacitor are grounded; wherein the charging circuit includes a current source and a current source switch, and the current source is connected to an input end of the current source switch, and an output end of the current source switch is connected to the first end of the second capacitor, and a control end of the current source switch is connected to a charging control signal.

Liquid crystal display

The invention provides a circuit and method for common voltage feedback compensation and LCD. The circuit comprises: a timing controller and a power management circuit, the timing controller and the power management circuit being electrically connected; the timing controller providing a corresponding preset feedback compensation value to the power management circuit under different images; the power management circuit comprising a common voltage compensation circuit and an adder, and the adder integrating the feedback compensation value and a feedback common voltage returned from a feedback point in a display panel through addition obtain an integration result, the common voltage compensation circuit obtaining a common voltage compensation signal based on the integration result and providing the common voltage compensation signal to the display panel. The invention generates the feedback compensation value required for the common voltage feedback and provides to the power management circuit under different images through the timing controller.

Circuit and method for common voltage feedback compensation and liquid crystal display device

A voltage generation circuit is disclosed. The circuit includes: a buck circuit and a charge pump circuit; the buck circuit includes a second switching transistor, a second diode for freewheeling and a second inductor for storing energy, wherein a first end of the second switching transistor is connected to an input voltage, a second end is connected to a cathode of the second diode, a control end is connected with a control signal; an anode of the second diode is connected to a ground; a first end of the second inductor is connected to the cathode of the second diode, a second end is connected to a digital voltage output terminal; the cathode of the second diode is connected to the charge pump circuit, voltage on the cathode of the second diode is outputted as an auxiliary voltage for generating a reference voltage after boosted by the charge pump circuit.

Voltage generation circuit

The present disclosure proposes a method and a system of controlling backlight driving. The method includes receiving an initial-pulse-width modulating signal and outputting a corresponding pulse-width modulating signal according to the initial-pulse-width modulating signal. The pulse-width modulating signal is used to control a corresponding LED string to illuminate. A cycle of each of the pulse-width modulating signals is the same with a predetermined phase difference.

Method and system of controlling backlight driving

A circuit for detecting a short circuit of a common electrode wiring is applied in an LCD panel and includes a common electrode wiring, a short circuit determination module and a resistor. An output terminal of the common electrode wiring is connected with a first terminal of the resistor and an input terminal of the short circuit determination module, and a second terminal of the resistor is connected with an input terminal of the short circuit determination module. The short circuit determination module obtains a voltage drop signal according to a first signal outputted by the common electrode wiring and a second signal from the resistor in a blanking period of the LCD panel, and determines that the common electrode wiring has a short circuit if the voltage value of the voltage drop signal is greater than the voltage value of a reference signal throughout a predetermined period.

Circuit and method for detecting short circuit of common electrode wiring

A display driving chip and a liquid crystal display device are provided. The display driving chip including chip body and an enable signal generation module. The chip body is configured to provide a power supplying voltage to a power supplying end of a first comparator and to output a driving signal when an enable signal is at a high electrical level and an input voltage is greater than a predetermined under-voltage lock out (UVLO) voltage, and configured to stop from providing the power supplying voltage to the power supplying end of the first comparator and from outputting the driving signal when the enable signal is at a low electrical level or when the enable signal is at the high electrical level and the input voltage is less than or equal to the predetermined UVLO voltage.

Display driving chip and liquid crystal display device

The invention provides a display control circuit, method and panel display device. The display control circuit includes: a current source, a first capacitor, a discharge circuit, a subtractor, and an initial reference voltage generating module; the current source coupled to first end of the first capacitor to generate a charging voltage changing with time, and second end of the first capacitor grounded; the discharge circuit connected to first end of the first capacitor to clear the charging voltage at beginning of each frame; a negative input end of the subtractor inputting the charging voltage, a positive input end of the subtractor connected to output end of the initial reference voltage generating module, and the subtractor outputting an adjusted reference voltage required for different regions of display panel; the initial reference voltage generating module outputting a fixed initial reference voltage; the adjusted reference voltage used for generating a gamma voltage.

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Shenzhen, China

Xianming Zhang