公开(公告)号：US10796618B2

公开(公告)日：2020-10-06

申请号：US16130215

申请日：2018-09-13

Applicant: Samsung Display Co., Ltd.

Inventor： Yanguk Nam ,  Dae-sik Lee

IPC: G09G3/20 ,  G09G3/3266 ,  G09G3/36

Abstract: A display panel driving device includes a control signal generator which outputs a driving control signal, a driving unit which receives the driving control signal to output a panel driving signal, a protection circuit unit which receives a feedback current from the control signal generator and compares the feedback current with a reference current to perform a protection operation based on a result of comparison of the feedback current with the reference current, a temperature sensor which senses an ambient temperature, a controller which outputs a selection signal variable depending on the sensed ambient temperature, and a protection operation setting unit which sets a condition of the protection operation in response to the selection signal.

公开(公告)号：US10607562B2

公开(公告)日：2020-03-31

申请号：US15904722

申请日：2018-02-26

Applicant: Samsung Display Co., Ltd.

Inventor： Jongjae Lee ,  Dae-sik Lee ,  Yanguk Nam ,  Yoomi Kim ,  Songyi Han

IPC: G09G3/36 ,  H03K5/1252 ,  H03K5/24 ,  G09G3/20 ,  H03K21/08

Abstract: A voltage generation circuit of a display device includes an over-current detection circuit that provides a driving voltage to a voltage terminal and outputs an over-current detection signal. The over-current detection circuit includes a current detector that outputs a detection signal at a first level when a voltage corresponding to an output current flowing through the voltage terminal during a blank period, in which a blank signal is activated, is lower than a first reference level or higher than a second reference level, a glitch remover that outputs a noise detection signal when a time period in which the detection signal is maintained at the first level is longer than a reference maintenance time, and a noise filter that activates the over-current detection signal when the noise detection signal is activated at least twice during a predetermined time period.

公开(公告)号：US20190122611A1

公开(公告)日：2019-04-25

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

CPC classification number: G09G3/3258 ,  G09G3/3233 ,  G09G3/3696 ,  G09G2310/0264 ,  G09G2310/06 ,  G09G2310/08 ,  G09G2330/025 ,  G09G2330/028 ,  G09G2330/04 ,  G09G2330/045 ,  H01L27/3276

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：US10009967B2

公开(公告)日：2018-06-26

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.

公开(公告)号：US20170034885A1

公开(公告)日：2017-02-02

申请号：US15004903

申请日：2016-01-23

Applicant: Samsung Display Co., LTD.

Inventor： Dae-sik Lee ,  Tae-Gon Im ,  Jin-Won Jang

IPC: H05B33/08 ,  G09G3/34

CPC classification number: H05B33/0845 ,  G09G3/3406 ,  G09G3/3611 ,  G09G2320/0626 ,  G09G2320/0646 ,  G09G2320/0653 ,  H05B33/0818

Abstract: A light source apparatus includes a light source which emits light, a response improving part which generates a response improving signal based on a first dimming control signal having a first rising period, a first operation part which generate a second dimming control signal which has the first rising period based on the first dimming control signal, a second operation part which generates a third dimming control signal by performing an arithmetic operation based on the second dimming control signal and the response improving signal, the third dimming control signal having a second rising period shorter than the first rising period and a light source driver which generates a light source driving signal based on the third dimming control signal to drive the light source based on the light source driving signal.

Abstract translation: 一种光源装置，包括发光的光源，基于具有第一上升周期的第一调光控制信号产生响应改善信号的响应改善部，产生具有第一上升周期的第二调光控制信号的第一操作部， 基于第一调光控制信号的上升周期，第二操作部，其通过基于第二调光控制信号和响应改善信号进行算术运算来生成第三调光控制信号，第三调光控制信号具有较短的第二上升周期 以及基于第三调光控制信号产生光源驱动信号的光源驱动器，以根据光源驱动信号驱动光源。