Title:
POWER SUPPLY CIRCUIT AND DISPLAY SCREEN
Document Type and Number:
WIPO Patent Application WO/2023/078157
Kind Code:
A1
Abstract:
Provided are a power supply circuit and a display screen. The power supply circuit comprises: a first buck filtering module (103), which outputs a first voltage signal by means of a first output end, and outputs a second voltage signal by means of a second output end; and a second buck filtering module (104), which outputs a third voltage signal by means of a third output end, and outputs a fourth voltage signal by means of a fourth output end, wherein a first voltage difference between the first voltage signal and the second voltage signal is fixed, a second voltage difference between the third voltage signal and the fourth voltage signal is fixed, and the first voltage difference is greater than the second voltage difference; and the first output end is electrically connected to the third output end, or, the second output end is electrically connected to the fourth output end. Power can be supplied to a common-cathode display screen, and power can also be supplied to a common-anode display screen, without needing to design two types of power supplies. Therefore, the power supply circuit is flexible and practical, such that the cost can be effectively reduced, and different voltage requirements of an LED chip can be met, thereby reducing energy consumption.
Inventors:
LAN RONGNAN (CN)
WU CHUNGUANG (CN)
WU CHUNGUANG (CN)
Application Number:
PCT/CN2022/127988
Publication Date:
May 11, 2023
Filing Date:
October 27, 2022
Export Citation:
Assignee:
QSTECH CO LTD (CN)
International Classes:
H02M1/00; H02H7/10; H02M1/44
Foreign References:
| CN216290646U | 2022-04-12 | |||
| CN211630456U | 2020-10-02 | |||
| CN201725543U | 2011-01-26 | |||
| CN212906894U | 2021-04-06 | |||
| CN206134209U | 2017-04-26 | |||
| CN112349239A | 2021-02-09 | |||
| US20190069363A1 | 2019-02-28 |
Attorney, Agent or Firm:
BEYOND ATTORNEYS AT LAW (CN)
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