公开(公告)号：US10797721B2

公开(公告)日：2020-10-06

申请号：US16520921

申请日：2019-07-24

Applicant: BOE Technology Group Co., Ltd.

Inventor： Tangxiang Wang ,  Chen Song ,  Zhan Gao

IPC: H03M1/78

Abstract: A digital to analog converter, a method for driving the same, and a display device are provided. The digital to analog converter includes: a first resistor string, 2m first multiplexers, a first voltage selector, a second resistor string, a second voltage selector, and a second multiplexer, where the 2m first multiplexers, the first voltage selector, and the second voltage selector operate in cooperation with each other so that the entire second resistor string can be connected in series to the first resistor string for further division.

公开(公告)号：US20200074924A1

公开(公告)日：2020-03-05

申请号：US16441064

申请日：2019-06-14

Applicant: BOE Technology Group Co., Ltd.

Inventor： Tangxiang Wang ,  Chen Song

IPC: G09G3/3233

Abstract: Provided are an external compensation circuit and method, and display device in the field of display techniques. The external compensation circuit includes a regulation sub-circuit that may collect a driving current loaded to a light-emitting unit and a reference current from a reference current source, and regulate potentials at two nodes connected to a compensation sub-circuit according to the collected current, to enable the compensation sub-circuit to calibrate a data signal to be input to a pixel circuit according to a potential difference between the two nodes.

公开(公告)号：US10573232B2

公开(公告)日：2020-02-25

申请号：US15565500

申请日：2017-05-05

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Chen Song ,  Zhongyuan Wu

IPC: G06F3/038 ,  G09G3/3233 ,  G09G3/3283 ,  G09G5/00

Abstract: The present disclosure provides conversion circuit and operation method thereof, compensation device, and display apparatus. The conversion circuit includes a conversion unit connected between an output terminal and a first voltage terminal, and an input unit connected with an input terminal and the conversion unit respectively; the input unit is configured to receive current signal from the input terminal and supply the current signal to the conversion unit, and the conversion unit is configured to convert the current signal supplied by the input unit into voltage signal and output the voltage signal from the output terminal; and an equivalent resistance of the conversion unit is configured such that preset voltage corresponding to standard current is output from the output terminal when the standard current is input from the input terminal. With the technical solutions of the present disclosure, drive current for pixel can be accurately converted into voltage signal.

公开(公告)号：US10380941B2

公开(公告)日：2019-08-13

申请号：US15543280

申请日：2016-03-29

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Chen Song

IPC: G09G3/3233 ,  G09G3/3208 ,  G09G3/32

Abstract: An OLED pixel circuit and a display apparatus comprising the OLED pixel circuit. An OLED pixel circuit comprises an OLED and driving units (TFT1, S1, C) for driving the OLED to emit light, wherein one electrode of the OLED is connected to the driving units (TFT1, S1, C). The OLED pixel circuit further comprises compensation units (R1, S2, TFT2, R2). The compensation units (R1, S2, TFT2, R2) comprises a sensing element (R1) which can sense light and convert an optical signal of the OLED into an electrical signal. The compensation units (R1, S2, TFT2, R2) compensate for currents used by the driving units (TFT1, S1, C) to drive the OLED according to the light-emitting brightness of the OLED.

公开(公告)号：US10291254B2

公开(公告)日：2019-05-14

申请号：US15735097

申请日：2017-07-07

Applicant: BOE Technology Group Co., Ltd.

Inventor： Tangxiang Wang ,  Chen Song

IPC: G09G5/00 ,  H03M1/76 ,  G09G3/3291

Abstract: Embodiments of the present disclosure relate to a digital-to-analog conversion circuit and method, a source driver, and a display apparatus. The digital-to-analog conversion circuit includes a first digital-to-analog converter corresponding to m high bits of (m+n)-bit digital signal and a second digital-to-analog converter corresponding to n low bits, where m and n are integers greater than 0. The first digital-to-analog converter comprises a voltage division module configured to generate 2m reference voltages at equal intervals in voltage; a first voltage selection module configured to select, from the 2m reference voltages, a first voltage corresponding to the m bits; and an operation module configured to generate a second voltage higher than the first voltage by the interval in voltage based on two adjacent reference voltages of the 2m reference voltages and the first voltage. The second digital-to-analog converter is configured to generate a third voltage corresponding to the n bits by using the first voltage and the second voltage as reference voltages, and to generate the sum of the third voltage and the first voltage.

公开(公告)号：US20170053590A1

公开(公告)日：2017-02-23

申请号：US15022359

申请日：2015-08-04

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Danna Song ,  Zhongyuan Wu ,  Junjie Lin ,  Cuili Gai ,  Lirong Wang ,  Chen Song ,  Szuheng Tseng

IPC: G09G3/3225 ,  G01R19/165

CPC classification number: G09G3/3225 ,  G01R19/1659 ,  G09G3/32 ,  G09G3/3233 ,  G09G3/3275 ,  G09G2300/0819 ,  G09G2300/0842 ,  G09G2310/0251 ,  G09G2320/0233 ,  G09G2320/0295 ,  G09G2320/045

Abstract: The disclosure provides a detection circuit, a detection method and a drive system. The detection circuit comprises a switching unit, a reset unit and a comparison unit. The switching unit is used for switching the operations of the reset unit and the comparison unit. The reset unit is used for resetting the acquisition unit before the acquisition unit begins acquisition. The comparison unit is used for comparing a signal acquired by the acquisition unit with a standard signal to obtain a characterization quantity of the to-be-detected voltage.

Abstract translation: 本公开提供了检测电路，检测方法和驱动系统。 检测电路包括开关单元，复位单元和比较单元。 切换单元用于切换复位单元和比较单元的操作。 复位单元用于在采集单元开始采集之前复位采集单元。 比较单元用于将由采集单元获取的信号与标准信号进行比较，以获得待检测电压的表征量。