US 12,169,429 B2
Power supply abnormality detection circuit and display terminal
Yue Fan, Huizhou (CN)
Assigned to Huizhou China Star Optoelectronics Display Co., Ltd., Huizhou (CN); and Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen (CN)
Filed by Huizhou China Star Optoelectronics Display Co., Ltd., Huizhou (CN); and Shenzhen China Star Optoelectronics Semiconductor Display Technology Co., Ltd., Shenzhen (CN)
Filed on Jul. 28, 2022, as Appl. No. 17/876,150.
Claims priority of application No. 202210849800.5 (CN), filed on Jul. 19, 2022.
Prior Publication US 2024/0028096 A1, Jan. 25, 2024
Int. Cl. G09G 5/00 (2006.01); G06F 1/28 (2006.01); G09G 3/00 (2006.01)
CPC G06F 1/28 (2013.01) [G09G 3/006 (2013.01); G09G 2330/12 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A power supply abnormality detection circuit, comprising:
a power supply conversion module for converting an input power supply into an output power supply;
a comparison module electrically connected to the power supply conversion module, wherein the comparison module is configured to compare a current output power supply with a preset reference power supply to obtain a first comparison signal;
a control module electrically connected to the comparison module, wherein the control module is configured to generate a control signal based on the first comparison signal; and
a power supply management module electrically connected to the control module, wherein the power supply management module is configured to determine a first operation state corresponding to normality of the output power supply and a second operation state corresponding to abnormality of the output power supply based on the control signal;
wherein the power supply conversion module further comprises a current mirror unit including a first current source, a second current source, a resistor, and a capacitor, wherein:
one terminal of the first current source is electrically connected to a first preset voltage, the other terminal of the first current source is electrically connected to one terminal of the resistor, and the other terminal of the resistor is grounded; and
one terminal of the second current source is electrically connected to a second preset voltage, the other terminal of the second current source is electrically connected to one terminal of the capacitor, and the other terminal of the capacitor is grounded.