公开(公告)号：US20210159909A1

公开(公告)日：2021-05-27

申请号：US16766602

申请日：2019-12-16

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang WANG ,  Chen SONG

IPC: H03M1/36 ,  G09G3/20

Abstract: Digital-to-analog conversion circuit, digital-to-analog conversion method, display apparatus are disclosed. Digital-to-analog conversion circuit may comprise: voltage dividing sub-circuit comprising M voltage dividing signal terminals; decoding sub-circuit comprising M input and output terminals, M input terminals electrically coupled to first to Mth voltage dividing signal terminals of voltage dividing sub-circuit respectively, decoding sub-circuit configured to receive digital signal and select one of M input terminals to be electrically connected with output terminal according to digital signal; amplification sub-circuit comprising input and output terminals, input terminal of amplification sub-circuit electrically coupled to output terminal of decoding sub-circuit, amplification sub-circuit configured to amplify signal at its input terminal, output analog gray-scale voltage at output terminal, voltage dividing signal at voltage dividing signal terminal is less than or equal to ½ of maximum load voltage at output terminal of digital-to-analog conversion circuit, amplification sub-circuit has amplification coefficient N greater than or equal to 2.

公开(公告)号：US20210013899A1

公开(公告)日：2021-01-14

申请号：US16489150

申请日：2019-03-18

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang WANG ,  Chen SONG ,  Zhan GAO ,  Yi CHEN

IPC: H03M1/68 ,  H03M1/76 ,  G09G3/20

Abstract: Embodiments of the present disclosure provide a digital-to-analog converter, a conversion circuit and a display device. An M-bit digital-to-analog converter includes a higher M−N-bit digital-to-analog conversion circuit, a voltage conversion circuit, an output circuit. The higher M−N-bit digital-to-analog conversion circuit includes: a higher M−N-bit voltage division generation circuit, a first voltage selection circuit. The first voltage selection circuit selects a first voltage from the higher M−N-bit voltage division generation circuit based on a higher M−N-bit digital signal, to be output from a first voltage end. The voltage conversion circuit charges a capacitor circuit under the control of a first switch circuit and a second switch circuit, and discharges a second voltage to a second voltage end through the capacitor circuit. The output circuit controls the first voltage and the second voltage based on a lower N-bit digital signal, generates an analog voltage signal corresponding to an M-bit digital signal.

公开(公告)号：US20200091928A1

公开(公告)日：2020-03-19

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：US20190036542A1

公开(公告)日：2019-01-31

申请号：US15735097

申请日：2017-07-07

Applicant: BOE TECHNOLOGY GROUP CO., LTD.

Inventor： Tangxiang Wang ,  Chen SONG

IPC: 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：US20160253962A1

公开(公告)日：2016-09-01

申请号：US14769068

申请日：2015-01-06

Applicant: BOE Technology Group Co., Ltd.

Inventor： Quanhu LI ,  Chen SONG

IPC: G09G3/3225

CPC classification number: G09G3/3225 ,  G09G3/3266 ,  G09G2300/0809 ,  G09G2310/0213 ,  G09G2310/0218

Abstract: Disclosed is a pulse signal combination circuit for combining N input pulse signals sequentially effective within each display period into an output pulse signal, N being an integer greater than 1, including N output control units and a pulse signal output end. A first control end of an nth output control unit is configured to receive an nth input pulse signal, a second control end thereof is configured to receive an (n+1)th input pulse signal, and an output end thereof is connected to the pulse signal output end. The nth output control unit is configured to, within a time duration of each display period after the nth input pulse signal is effective for the first time and before the (n+1)th input pulse signal is effective for the first time, output the nth input pulse signal to the pulse signal output end, where n is a positive integer less than N.

Abstract translation: 公开了一种脉冲信号组合电路，用于将在每个显示周期内顺序有效的N个输入脉冲信号组合成输出脉冲信号，N是大于1的整数，包括N个输出控制单元和脉冲信号输出端。 第n输出控制单元的第一控制端被配置为接收第n输入脉冲信号，其第二控制端被配置为接收第（n + 1）个输入脉冲信号，并且其输出端连接到脉冲 信号输出端。 第n输出控制单元被配置为在第n个输入脉冲信号在第一次有效之后且在第（n + 1）个输入脉冲信号第一次有效之前的每个显示周期的持续时间内，输出 第n个输入脉冲信号到脉冲信号输出端，其中n是小于N的正整数。