公开(公告)号：US20170148413A1

公开(公告)日：2017-05-25

申请号：US15201285

申请日：2016-07-01

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyejung Hong ,  Sanghyun Park ,  Kyungmo Lee ,  Yong-Sik Hwang

IPC: G09G5/00

CPC classification number: G09G5/003 ,  G09G2300/0426 ,  G09G2310/0275 ,  G09G2310/08 ,  G09G2330/021 ,  G09G2330/022 ,  G09G2330/028

Abstract: A voltage generator includes: a transforming unit to transform an input voltage into an output voltage in response to a switching signal; a feedback voltage controller to compare the output voltage with a reference voltage when a start signal is activated, and to output a feedback voltage corresponding to the comparison of the output voltage with the reference voltage; and a power controller to compare the feedback voltage with the reference voltage, and to output the switching signal corresponding to the comparison of the feedback voltage with the reference voltage.

公开(公告)号：US10224000B2

公开(公告)日：2019-03-05

申请号：US15201285

申请日：2016-07-01

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Hyejung Hong ,  Sanghyun Park ,  Kyungmo Lee ,  Yong-Sik Hwang

IPC: G09G5/00

Abstract: A voltage generator includes: a transforming unit to transform an input voltage into an output voltage in response to a switching signal; a feedback voltage controller to compare the output voltage with a reference voltage when a start signal is activated, and to output a feedback voltage corresponding to the comparison of the output voltage with the reference voltage; and a power controller to compare the feedback voltage with the reference voltage, and to output the switching signal corresponding to the comparison of the feedback voltage with the reference voltage.

公开(公告)号：US10178732B2

公开(公告)日：2019-01-08

申请号：US15589488

申请日：2017-05-08

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sanghyun Lee ,  Hyejung Hong

IPC: H05B37/02 ,  H05B33/08 ,  G09G3/34 ,  G02F1/13357

Abstract: A backlight unit of a display device includes a power converter to generate a light source voltage in response to a power control signal, a light emitting element connected between a first node and a second node, and a light source controller connected to the second node and to output the power control signal in response to a dimming signal. The light emitting element receives the light source power voltage through the first node. When a feedback voltage of the second node is lower than a first reference voltage, the light source controller outputs the power control signal having a first pulse width based on the feedback voltage and the dimming signal. When the feedback voltage is higher than the first reference voltage, the light source controller outputs the power control signal having a second pulse width based on a voltage lower than the feedback voltage and the dimming signal.

公开(公告)号：US09767736B2

公开(公告)日：2017-09-19

申请号：US14968454

申请日：2015-12-14

Applicant: SAMSUNG DISPLAY CO., LTD.

Inventor： Sanghyun Lee ,  Geunhyuk Choi ,  Hyejung Hong

IPC: G09G3/36 ,  G09G3/34 ,  H05B33/08

CPC classification number: G09G3/3406 ,  G09G3/3648 ,  G09G2320/062 ,  G09G2320/064 ,  H05B33/086

Abstract: A backlight unit of a display apparatus includes a power converter generating a light source power voltage in response to a power control signal, a first node, a second node, a light emitting element connected between the first node and the second node, and a controller connected to the second node. The light emitting element is configured to receive the light source power voltage through the first node, and the controller is configured to output the power control signal for controlling current flowing through the light emitting element in response to a dimming signal. When the dimming signal has a first level, the controller outputs the power control signal to turn off the power converter.