Boe Technology Group Co., Ltd.

Chengdu Boe Optoelectronics Technology Co., Ltd.

Xiaoxiang He

Xiaojing Qi

Yin Deng

Dongmei Wei

Yang Wang

Bo Wu

Like Hu

The present disclosure relates to a pixel driving circuit, a pixel driving method and a display device. A voltage related to a threshold voltage of a driving unit is stored in a storage unit during a compensation stage of the pixel driving circuit utilizing a charging control unit so that an operating current of the driving unit is not affected by the threshold voltage during a light emitting holding stage of the pixel driving circuit. Thus, the influence of the threshold voltage of the driving unit on an operating current thereof is eliminated and an issue in which the display luminance of the light emitting element is not uniform due to inconsistency in the threshold voltage is solved, which improves display quality of the display device.

Pixel driving circuits, pixel driving methods and display devices

The present disclosure provides a pixel driving circuit, a pixel driving method, a, display panel and a display device. The pixel driving circuit includes a driving transistor, a storage capacitor, a switching control module, a writing control module and a light-emission control module. A gate electrode of the driving transistor is electrically connected to a first electrode of the driving transistor at a threshold compensation stage and a writing stage under the control of the switching control module, so as to write a threshold voltage of the driving transistor into the storage capacitor. A data voltage is written into a second electrode of the driving transistor at the writing stage under the control of the writing control module. According to the present disclosure, the threshold voltage of the driving transistor and the data voltage from the data line are separately written into the storage capacitor through the switching control module and the writing control module, so as to enable a driving current of the driving transistor to be independent of the threshold voltage of the driving transistor. In addition, a reference voltage is written into a second end of the storage capacitor at the writing stage through the writing control module, and the driving current of the driving transistor is enabled to be independent of an on-state voltage of a light-emitting element at a light-emission maintenance stage.

Pixel driving circuit, pixel driving method, display panel and display device

The present disclosure provides a display substrate, a manufacturing method thereof, and a display device. The display substrate includes a shielding pattern created from a layer identical to a pixel electrode and configured to prevent a display function of a display function layer from being adversely affected by a signal from a signal line.

Display substrate, manufacturing method thereof, and display device

A fingerprint identification circuit includes a plurality of fingerprint identification units arranged in an array form. Each fingerprint identification unit includes: an input module configured to apply a detection signal to a sensing module; the sensing module configured to sense a fingerprint and transmit a sensing signal to a source follower; the source follower configured to amplify the sensing signal and output it to an output module; an output control module configured to apply an operating voltage for the source follower to the source follower; the output module configured to output the amplified sensing signal; a resetting module configured to reset an output end of the source follower and an input end of the output module to be at a first level; and an acquisition module configured to enable the input end and an operating voltage input end of the source follower to be electrically connected to each other.

Fingerprint identification circuit, driving method thereof, and display device

The present disclosure relates to a pixel compensation circuit and an AMOLED display device. The pixel compensation circuit includes a data signal writing sub-circuit, a high voltage signal writing sub-circuit, a first reference voltage writing sub-circuit, a second reference voltage writing sub-circuit, a voltage maintaining sub-circuit, a driving transistor, a capacitor, and a light emitting device. The data signal writing sub-circuit is connected to a first terminal of the capacitor, the first reference voltage writing sub-circuit is connected to a control electrode of the driving transistor, and the second reference voltage writing sub-circuit is connected to a drain of the driving transistor. The high voltage signal writing sub-circuit is connected to a second terminal of the capacitor, and the voltage maintaining sub-circuit is connected to the first terminal of the capacitor and the control electrode of the driving transistor.

Pixel compensation circuit and AMOLED display device

A pixel compensation circuit and an Active Matrix Organic Light Emitting Diode (AMOLED) display apparatus. The circuit includes a data signal writing module, a high voltage signal writing module, a first reference voltage generation module and a second reference voltage writing module; the data signal writing module and the high voltage signal writing module are connected with a first terminal of the capacitor; the first reference voltage generation module is connected with a second terminal of the capacitor and a drain of the driving transistor; a gate of the driving transistor is connected with the second terminal of the capacitor, the drain thereof is connected with an anode of the light emitting device, a source thereof is connected with the second reference voltage writing module, and connected with the high voltage signal writing module; a cathode of the light emitting device is connected with a common ground electrode.

Pixel compensation circuit and active matrix organic light emitting diode display apparatus

A pixel circuit, a driving method and a display device are provided. The pixel circuit includes a threshold compensation unit, configured to pull voltage of first node and voltage of first level terminal uniform, pull voltage of third node and voltage of second node uniform, and make the voltage of the first node and the voltage of the third node have an equipotential change; a driving unit, configured to output driving current; a data writing unit, configured to pull the voltage of the third node and the voltage of a data signal terminal uniform; a resetting unit, configured to pull a voltage of fourth node and a voltage of a third level terminal uniform; an EL light-emitting unit, configured to display gray scales through driving current; and a feedback unit, configured to make the voltage of the third node and the voltage of the fourth node have an equipotential change.

Pixel circuit, a driving method for driving the pixel circuit, and a display device

A pixel compensation circuit includes a data signal writing module, a high voltage writing module, a first reference voltage generation module, a driving transistor, a capacitor and a light emitting device. The data signal writing module is connected to a first end of the capacitor. The high voltage writing module is connected to the first end of the capacitor. The first reference voltage generation module is connected to a second end of the capacitor, an anode of the light emitting device and a drain electrode of the driving transistor. A gate electrode of the driving transistor is connected to the second end of the capacitor, a source electrode thereof is connected to the high voltage writing module, and the drain electrode thereof is connected to the anode of the light emitting device. A cathode of the light emitting device is connected to a common grounding electrode.

The present application discloses a gate driver on array (GOA) circuit including a first GOA circuit; a second GOA circuit; and a voltage transmitting circuit configured to transmit an output voltage from the first GOA circuit to the second GOA circuit as an input voltage for the second GOA circuit; the output voltage from the first GOA circuit and the input voltage for the second GOA circuit having a substantially the same voltage level. An input port of the voltage transmitting circuit is connected to an output port of the first GOA circuit and configured to receive the output voltage from the first GOA circuit; and an output port of the voltage transmitting circuit is connected to an input port of the second GOA circuit and configured to output a forwarded voltage to the second GOA circuit as the input voltage for the second GOA circuit.

Gate driving circuit, display panel and display apparatus having the same, and driving method thereof

A fingerprint identification circuit comprises multiple reading sub-circuits, and multiple fingerprint identification sub-circuits each column of fingerprint identification sub-circuits are connected with one reading sub-circuit, each fingerprint identification sub-circuit comprises a writing sub-circuit, a sensing sub-circuit and a output sub-circuit, the writing sub-circuit is connected with a scan signal input terminal; the sensing sub-circuit senses a fingerprint and transmits a sensing signal to the output sub-circuit; the output sub-circuit outputs the sensing signal upon the writing sub-circuit is turned off each fingerprint identification sub-circuit further comprises: a converting and amplifying sub-circuit provided between the sensing sub-circuit and the output sub-circuit, for converting the sensing signal into a current signal, amplifying the current signal and outputting it to the output sub-circuit, the reading sub-circuit is connected with the output sub-circuit for reading the sensing signal and converting the current signal into a voltage signal to output.

Fingerprint identification circuit, touch apparatus and fingerprint identification method

The present application discloses a pixel driving chip for compensating an original signal provided to a pixel structure including a driving transistor having a drain electrode coupled to a light-emitting device, the pixel driving chip includes a control circuit configured to generate at least one control voltage signals for controlling the driving transistor; an acquisition circuit configured to acquire a measured source voltage at a source electrode of the driving transistor under control of the at least one control voltage signals; a computation circuit configured to compute a compensation voltage based on the measured source voltage; a storage circuit configured to store the compensation voltage; a compensation circuit configured to compensate the original signal provided to the driving transistor using the compensation voltage stored in the storage circuit to obtain a compensated signal; and an output circuit configured to output the compensated signal to the driving transistor.

Pixel driving chip, driving method thereof, and pixel structure

The present application provides a PIN photodiode, an X-ray detecting pixel, an X-ray detecting apparatus and a detecting method thereof. The PIN photodiode may comprise a first doped layer, an intrinsic layer disposed over the first doped layer, and a second doped layer disposed over the intrinsic layer. The photodiode further comprises a third doped layer disposed over the second doped layer.

PIN photodiode, X-ray detecting pixel, X-ray detecting apparatus and detecting method thereof

There are disclosed a shift register unit () and a driving method thereof, a gate driving apparatus and a display apparatus. The shift register unit () comprises a scanning direction selection unit (), a control unit (), a bootstrap unit (), a first pull-down maintenance unit () and a second pull-down maintenance unit (), which are used to reduce electric stress of a part of elements in the shift register unit (), so as to raise stability of operation and prolong service life. Additionally, it is capable of realizing a narrow frame design of a liquid crystal display. The gate driving apparatus can adopt the GOA technique to enhance integrity of the TFT-LCD panel.

Growing community of inventors

Beijing, China

Xiaoxiang He