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：US10197838B2

公开(公告)日：2019-02-05

申请号：US15677503

申请日：2017-08-15

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Yanguk Nam ,  Daesik Lee ,  Jongjae Lee ,  Sujin Kim ,  Junki Hong

IPC: G02F1/1333 ,  G02F1/1368 ,  G09G3/36

Abstract: A display device includes a display panel, a plurality of pixels arranged on the display panel, a data driver and a gate driver configured to apply a driving signal to the plurality of pixels, a timing controller configured to apply a control signal to the data driver and the gate driver, and store a plurality of driving voltage predetermined values for different temperatures, a temperature sensor configured to measure an ambient temperature, and a power management integrated circuit configured to adjust a driving voltage. The power management integrated circuit includes a controller configured to receive a driving voltage predetermined value among the plurality of driving voltage predetermined values from the timing controller using the measured ambient temperature, a plurality of storage banks configured to store the driving voltage predetermined value, and a power generator configured to output the driving voltage at the driving voltage predetermined value.

公开(公告)号：US09870743B2

公开(公告)日：2018-01-16

申请号：US14683732

申请日：2015-04-10

Applicant: Samsung Display Co., Ltd.

Inventor： Junki Hong ,  Yanguk Nam ,  Jong Jae Lee

IPC: G09G3/36 ,  G11C7/04 ,  G11C19/28

CPC classification number: G09G3/3648 ,  G09G3/3677 ,  G09G2300/0413 ,  G09G2330/045 ,  G09G2330/10 ,  G09G2330/12 ,  G11C7/04 ,  G11C19/28

Abstract: A display apparatus including: a plurality of pixels receiving data voltages in response to gate signals; a drive circuit generating a power voltage and a control signal; a gate driver operating with the power voltage, generating the gate signals and a dummy gate signal in response to the control signal, and supplying the dummy gate signal to the drive circuit; and a data driver operating with the power voltage and generating the data voltages in response to the control signal. The drive circuit measures a temperature of the drive circuit, and a voltage and a current at an output node of the drive circuit generating the power voltage. The measured temperature, voltage and current, and the dummy gate signal are stored in the drive circuit in a predetermined order. This information can be used to detect error states that the display can indicate and use to protect itself from damage.