Boe Technology Group Co., Ltd.

Hefei Boe Optoelectronics Technology Co., Ltd.

International Business Machines Corporation

Jie Ling

Wenjian Wang

Sheng Yan Sun

Shan Jiang

Douqing Zhang

Lei Hua

Yan Ma

Shuo Li

Peng Hui Jiang

Xiaobo Wang

Feng Liu

Meng Wang

Yu Huang

Donghui Wang

Wei Cheng

Ran Jiang

Chunhua Li

Lei Qin

Wei Lei

Xiaohua Lin

Xiangen Wang

Liangming Luo

A system, method, and computer program product are configured to: provide a tablespace comprising an original partition having a lower boundary L, an upper boundary U, a split percentage P, and a split ratio R; and in response to the original partition reaching a fullness of P, automatically split the original partition to a first progeny partition and a second progeny partition, wherein the first progeny partition has a lower boundary Lthat is the same as the lower boundary L of the original partition and an upper boundary Uthat is determined based on whether the insert is a sequential or random insert, and wherein the second progeny partition has an upper boundaries Uthat is the same as the upper boundary U of the original partition and a lower boundary Lthat is determined based on whether the insert is a sequential or random insert.

Self-maintained tablespace

The method of this disclosure includes identifying a hot area in an index tree where an index split of the index tree has occurred due to a previous data insertion into a database based on historical statistic information on the index split. The method of this disclosure may further include predicting boundary key values of one or more new index pages to be inserted into the index tree for a next data insertion into the database based on a distribution of the hot area in the index tree. The method of this disclosure may further include inserting the one or more new index pages into the index tree based on the predicted boundary key values prior to the next data insertion.

Insert performance improvement

Selecting tables for compression by threshold statistical values. Identified tables are reordered according to fields having the lowest cardinality to increase the size of character strings replaced by keys during compression. Field locations are mapped between the original table and the reordered table. Dictionary-based compression is performed on reordered tables.

Reordering datasets in a table for increased compression ratio

A pixel drive circuit, a drive method thereof and a display device are provided. The pixel drive circuit includes a writing sub-circuit, an amplification sub-circuit, and a drive sub-circuit, writing sub-circuit is configured to transmit a data voltage provided by a signal input terminal to the amplification sub-circuit under control of the scan signal terminal; the amplification sub-circuit is configured to generate an amplification electrical signal according to the data voltage and output the amplification electrical signal to a drive sub-circuit, the drive sub-circuit is configured to obtain the data voltage based on the amplification electrical signal output by the amplification sub-circuit and provide a drive current to a light-emitting device under control of the data voltage, and the light-emitting device is configured to emit light according to the drive current output by the drive sub-circuit.

Pixel drive circuit and drive method thereof, and display device

A pixel circuit and driving method thereof, a display substrate and a display device are disclosed. The pixel circuit includes a light-emitting element, a drive element, a first switch element, a reset circuit and a compensating circuit. The drive element is connected to the light-emitting element and configured to drive the light-emitting element to emit light; the first switch circuit is configured to apply a data voltage to the drive element under control of a scan signal; the reset circuit is electrically connected to the compensating circuit, and configured to apply a reset signal to the compensating circuit under control of the scan signal; the compensating circuit is configured to compensate the drive element, so as to allow a signal output from the drive element to be relevant with the data voltage and the reset voltage and to be irrelative to threshold characteristic of the drive element.

Pixel circuit and driving method thereof, display substrate and display apparatus

A touch pen, a driving method thereof, and a touch system are provided. The touch pen includes: a capacitance circuit having different capacitance values when the touch pen is at different tilt angles; a detection circuit configured to detect a capacitance value of the capacitance circuit and generate capacitance information corresponding to the capacitance value; and a signal generating circuit configured to generate a corresponding driving signal according to the capacitance information.

Touch pen, driving method thereof and touch system

A pixel driving circuit and a driving method therefor are provided. The pixel driving circuit includes a turn-on voltage acquiring device, a compensation device, a light-emitting controller, a data writing device, a driving transistor and a light emitting device. The turn-on voltage acquiring device acquires a turn-on voltage of the light emitting device and generates a compensation signal according to the turn-on voltage; the data writing device provides a data voltage to the gate of the driving transistor; the light-emitting controller provides a first operating voltage to a first electrode of the driving transistor; and the compensation device generates a control signal according to the compensation signal, the data voltage and the threshold voltage of the driving transistor and provides the control signal to the gate of the driving transistor; the driving transistor outputs a driving current to the light emitting device.

Pixel driving circuit and driving method thereof, and display apparatus

The present disclosure relates to a pixel compensation circuit and a method of driving the same, a display panel, and a display device. A pixel compensation circuit includes: a control sub-circuit, a write sub-circuit, a driving sub-circuit, and a light emitting sub-circuit, wherein the write sub-circuit is configured to, under the control of a scan signal terminal, transmit a data signal at a data signal terminal to the control sub-circuit and transmit a signal at a reference voltage signal terminal to the control sub-circuit; the control sub-circuit is configured to, under the control of a power control signal terminal, transmit a signal at a first power terminal to the driving sub-circuit, and under the combined action of a conduction control signal terminal and the power control signal terminal, control the driving sub-circuit to perform threshold compensation, and control the driving sub-circuit to generate a driving current to drive the light emitting sub-circuit to emit light.

Pixel compensation circuit and method of driving the same, display panel, and display device

A pixel driving circuit, a driving method thereof, and a display device are provided. According to the pixel driving circuit, a data voltage is provided to a first electrode of a driving transistor; a storage sub-circuit is charged or discharged; a first voltage signal from a first voltage terminal is provided to a control electrode of the driving transistor, and a second voltage signal from a second voltage terminal or a third voltage signal from a third voltage terminal is provided to a first node; the data voltage and a threshold voltage of the driving transistor are written to the control electrode of the driving transistor, to turn on a second electrode of the driving transistor and the third voltage terminal, to control a light-emitting element to emit light.

Pixel driving circuit and driving method thereof, and display device

The present disclosure discloses a pixel circuit, an array substrate, a display device and a pixel driving method, the pixel circuit including: a driving transistor, a light emitting device, a reset sub-circuit, a light emitting control sub-circuit, a compensation sub-circuit and a data writing sub-circuit, the compensation sub-circuit acquires a threshold voltage of the driving transistor and a turn-on voltage of the light emitting device in response to control of the second control signal and the third control signal, and writes a control voltage to a gate of the driving transistor in response to the first control signal, the control voltage is equal to a sum of the threshold voltage, the data voltage and the turn-on voltage, so that the driving current outputted by the driving transistor is independent of the threshold voltage of the driving transistor, and is positively correlated with the turn-on voltage of the light emitting device.

Growing community of inventors

Beijing, China

Jie Ling