US 11,862,094 B2
Power management driver with power line fault detection and display device having the same
Dae Sik Lee, Yongin-si (KR); Si Duk Sung, Yongin-si (KR); and Sang Hyun Lee, Yongin-si (KR)
Assigned to SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed by SAMSUNG DISPLAY CO., LTD., Yongin-si (KR)
Filed on Jun. 3, 2022, as Appl. No. 17/832,179.
Application 17/832,179 is a continuation of application No. 16/940,788, filed on Jul. 28, 2020, granted, now 11,355,066.
Claims priority of application No. 10-2019-0179066 (KR), filed on Dec. 31, 2019.
Prior Publication US 2022/0293058 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G09G 3/3258 (2016.01); G09G 3/3233 (2016.01); G09G 3/3266 (2016.01); G09G 3/3275 (2016.01)
CPC G09G 3/3258 (2013.01) [G09G 3/3233 (2013.01); G09G 3/3266 (2013.01); G09G 3/3275 (2013.01); G09G 2310/08 (2013.01); G09G 2330/021 (2013.01); G09G 2330/12 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power management driver, comprising:
a first power supply configured to supply a first voltage to a first driving power terminal of a pixel through a power line during a sensing period, and supply a second voltage to the first driving power terminal of the pixel through the power line during a display period; and
a fault detector configured to detect a current flowing through the power line to detect a fault in the power line during the sensing period,
wherein the first power supply comprises:
a digital-to-analog converter configured to output the first voltage based on a voltage of an input power;
a first switch coupled between the digital-to-analog converter and the power line, the first switch turned on in response to a first enable signal; and
a second switch coupled between the power line and a voltage source, to which the second voltage is supplied, the second switch turned on in response to a second enable signal.