TH41271A - Backup power supply for video display devices - Google Patents

Abstract

DC60 (08/01/41) Switching power supply circuit. For display devices With working mode And reserve of work Source controller circuit The switching power supply (20) provides a driving pulse (30) at the output, the working transformer (T1) on the primary winding (n1) and the secondary winding (n3, n4) for the output voltage (Vn). , Vn4) for video signal display device during operation mode of The working power switch (Q1) is connected to the primary winding (n1) of the working transformer (T1) to control the flow of current in the primary winding in response to the pulse driving the secondary (T2) transformer. There is a primary (n51) and a secondary (n53) winding for supplying voltage output (Vn3) for the visualization device during the backup mode of operation. The secondary power switch (Q51) is connected to the primary wire bottle (n51) of the secondary transformer (T2) to control the current flow in the The primary winding in response to the driving pulses. The pulses driven by the switching power supply controller circuit will Is connected to the power switch during the working mode of operation. And with the backup power switch between Backup mode of operation Switching power supply circuit For display devices With working mode and backup of work Loop until the source controller The switching power supply (20) provides driving pulses (30) at the output, the working transformer (T1) on the primary winding (n1) and the secondary winding (n3, n4) for the output voltage. (Vn, Vn4) For a visual signal display device, during the operating mode of operation, the power switch (Q1) is connected to the primary winding (n1) of the working transformer (T1) to control the current flow in the winding. The primary winding in response to the secondary transformer (T2) has the primary winding (n51) of the secondary transformer (T2) to control the current flow in the neutral winding. In response to driving pulses The pulses driven from the switching power supply regulator circuit are The power switch is connected during the operating mode of operation and with the backup power switch during the backup mode of operation.

Claims (1)

1.Switched power supply circuit For display devices that have an operation mode. The switching power supply circuit consists of: a switched power supply regulator circuit (20) for providing a pulse drive (30) at the exit point: a working transformer (T1) with a primary winding. (N1) and the secondary winding (n3, n4) for voltage output (Vn3, Vn4) for the device. Visual display during operating mode of operation: The switch is operating (Q1 (connected to the Primary (n1) of the working transformer (T1) for controlling the flow of current in the windings. Primary in tags: