公开(公告)号：US09668316B2

公开(公告)日：2017-05-30

申请号：US14749220

申请日：2015-06-24

Applicant: Samsung Display Co., Ltd.

Inventor： Seungyoung Choi ,  Dae-sik Lee

IPC: H05B33/08 ,  G09G3/00 ,  G09G3/34

CPC classification number: H05B33/0887 ,  G09G3/00 ,  G09G3/3406 ,  G09G2330/08 ,  H05B33/0815 ,  H05B33/0827 ,  Y02B20/341 ,  Y02B20/346

Abstract: According to an exemplary embodiment, a backlight unit includes a plurality of light emitting strings, and a driving controller configured to detect source voltages of a plurality of light transistors provided in the light emitting strings. The driving controller is further configured to compare a source voltage of each of the light transistors with an overcurrent protection voltage and to turn off an operation of a corresponding light transistor having a source voltage level higher than the overcurrent protection voltage. The backlight unit further includes a first comparator configured to compare the source voltage of the corresponding light transistor with a reference source voltage to output a feedback voltage according to the compared result; and a first switch configured to electrically connect the first comparator to a gate terminal of the corresponding light transistor, wherein the first switch operates in response to an overcurrent protection signal.

公开(公告)号：US10650724B2

公开(公告)日：2020-05-12

申请号：US16293334

申请日：2019-03-05

Applicant: Samsung Display Co., Ltd.

Inventor： Sujin Kim ,  Jongjae Lee ,  Yanguk Nam ,  Dae-sik Lee

IPC: G09G3/20

Abstract: A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.

公开(公告)号：US20190197940A1

公开(公告)日：2019-06-27

申请号：US16293334

申请日：2019-03-05

Applicant: Samsung Display Co., Ltd.

Inventor： Sujin Kim ,  Jongjae Lee ,  Yanguk Nam ,  Dae-sik Lee

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G3/20 ,  G09G2300/0426 ,  G09G2330/02 ,  G09G2330/028

Abstract: A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.

公开(公告)号：US10515592B2

公开(公告)日：2019-12-24

申请号：US16043739

申请日：2018-07-24

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yanguk Nam ,  Dae-sik Lee ,  Yoomi Kim ,  Junghwan Hwang

IPC: G09G3/3258 ,  G09G3/3233 ,  H01L27/32 ,  G09G3/36

Abstract: A display device includes: a display panel including data lines, gate lines, and pixels, the display panel is operated in an active period or in a blank period; and a driving circuit for driving the display panel, the driving circuit including: a signal controller for outputting clock control signals; a voltage generator for receiving the clock control signals, wherein the voltage generator outputs active clock signals synchronized with the clock control signals during the active period and outputs blank clock signals during the blank period; and an overcurrent detection circuit for receiving the clock control signals and the blank clock signals, the overcurrent detection circuit detects an overcurrent of the blank clock signals, and a phase difference between the clock control signals in the active period is different from a phase difference between the clock control signals in the blank period.

公开(公告)号：US10290246B2

公开(公告)日：2019-05-14

申请号：US15498191

申请日：2017-04-26

Applicant: Samsung Display Co., Ltd.

Inventor： Jongjae Lee ,  Seokhwan Lee ,  Dae-sik Lee ,  Seyoung Heo

IPC: G09G3/3266 ,  G09G3/00 ,  G09G3/36 ,  G09G3/3225

Abstract: A display apparatus includes a plurality of pixels for receiving a plurality of gate signals, and a plurality of data voltages, a level shifter for receiving a gate driving voltage and a plurality of gate control clocks to generate a plurality of reference clocks, and for generating a plurality of control clocks by delaying the reference clocks by a predetermined time, a gate driver for outputting the gate signals in response to the control clocks, a short circuit protector for sensing a current of each control clock at each falling edge of each gate control clock to detect a static current of the each control clock, and for outputting a shut-down signal based on a count of the static current detection, and a voltage generator for providing the gate driving voltage to the level shifter, and shutting down in response to the shut-down signal.

公开(公告)号：US10255841B2

公开(公告)日：2019-04-09

申请号：US15228998

申请日：2016-08-04

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sujin Kim ,  Jongjae Lee ,  Yanguk Nam ,  Dae-sik Lee

IPC: G09G3/20

Abstract: A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.

公开(公告)号：US20170148375A1

公开(公告)日：2017-05-25

申请号：US15228998

申请日：2016-08-04

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sujin Kim ,  Jongjae Lee ,  Yanguk Nam ,  Dae-sik Lee

IPC: G09G3/20

CPC classification number: G09G3/2092 ,  G09G3/20 ,  G09G2300/0426 ,  G09G2330/02 ,  G09G2330/028

Abstract: A display device includes: a first data driving chip including: a first data driving circuit to generate a first data signal; and a first sensor to sense a first overcurrent flowing in the first data driving circuit based on a first power current flowing in the first data driving circuit to generate a first signal; a second data driving chip including: a second data driving circuit to generate a second data signal; and a second sensor to sense a second overcurrent flowing in the second data driving circuit based on a second power current flowing in the second data driving circuit to generate a second signal; and a power controller to control first and second powers respectively supplied to the first and second data driving chips, and to block at least one of the first and second powers based on at least one of the first and second signals.

公开(公告)号：US20160323946A1

公开(公告)日：2016-11-03

申请号：US15048448

申请日：2016-02-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Dae-sik Lee ,  Seokhwan Lee ,  Won-hyoung Kang

IPC: H05B33/08

CPC classification number: H05B33/0815 ,  H05B33/0827

Abstract: A backlight unit includes a light source part, a DC/DC converter, and a light source driving circuit. The DC/DC converter receives an input voltage and provides a driving voltage to the light source part. The light source driving circuit receives an analog voltage, generates a clamping voltage on the basis of the analog voltage, and generates a main driving signal applied to the DC/DC converter on the basis of the analog voltage and the clamping voltage. The light source driving circuit decreases a duty ratio of the main driving signal when the analog voltage is equal to or lower than a reference voltage.

Abstract translation: 背光单元包括光源部分，DC / DC转换器和光源驱动电路。 DC / DC转换器接收输入电压并向光源部分提供驱动电压。 光源驱动电路基于模拟电压接收模拟电压，产生钳位电压，并根据模拟电压和钳位电压产生施加到DC / DC转换器的主驱动信号。 当模拟电压等于或低于参考电压时，光源驱动电路降低主驱动信号的占空比。

公开(公告)号：US11087691B2

公开(公告)日：2021-08-10

申请号：US16720370

申请日：2019-12-19

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yanguk Nam ,  Dae-sik Lee ,  Yoomi Kim ,  Junghwan Hwang

IPC: G09G3/3258 ,  G09G3/3233 ,  H01L27/32 ,  G09G3/36

Abstract: A display device includes: a display panel including data lines, gate lines, and pixels, the display panel is operated in an active period or in a blank period; and a driving circuit for driving the display panel, the driving circuit including: a signal controller for outputting clock control signals; a voltage generator for receiving the clock control signals, wherein the voltage generator outputs active clock signals synchronized with the clock control signals during the active period and outputs blank clock signals during the blank period; and an overcurrent detection circuit for receiving the clock control signals and the blank clock signals, the overcurrent detection circuit detects an overcurrent of the blank clock signals, and a phase difference between the clock control signals in the active period is different from a phase difference between the clock control signals in the blank period.

公开(公告)号：US10950197B2

公开(公告)日：2021-03-16

申请号：US16569562

申请日：2019-09-12

Applicant: Samsung Display Co., Ltd.

Inventor： Kihyun Pyun ,  Keunoh Kang ,  Moonshik Kang ,  Gwangsoo Ahn ,  Dae-sik Lee

IPC: G09G5/00 ,  G06F1/08

Abstract: A data driver of a display device includes an equalizer and an equalizer controller. The equalizer controller calculates a lock time during a training enable signal is in an active state while sequentially changing a set signal applied to the equalizer to one option code selected from among a plurality of option codes and provides an option code corresponding to a set lock time among the option codes to the equalizer as the set signal.