A DRIVING POWER SUPPLY APPARATUS FOR OLED

摘要

The present invention discloses a driving power supply apparatus for OLED. Wherein it comprises a power board connecting to a motherboard and a OLED screen, the motherboard comprises a standby circuit, a timing control module, a first and second transformer modules and a PFC circuit, the standby circuit connects to the timing control module and the motherboard, the timing control module connects to the PFC circuit, the motherboard and the first and second transformer modules, which connect to the motherboard and the PFC circuit. The isolation of two voltages, fulfills stability requirements of the power supplied to OLED, improves its picture quality; the timing control module will not light up the OLED screen until both switch and enable signals are stable simultaneously. This has changed the traditional power switch sequence, and made the power supply adapt to OLED's fast response characters.

主权项

1. A driving power supply apparatus for OLED comprises a power board connecting to both a motherboard and an OLED screen, wherein, the power board comprises: a standby circuit, a timing control module, a first transformer module, a second transformer module and a PFC circuit;
the standby circuit is configured to output a power at supply voltage to the motherboard then supply the timing control module after connecting to an outside power source; the timing control module starts the PFC circuit based on a switch signal fed back from the motherboard, and the PFC circuit outputs a high voltage direct current (HVDC) to the timing control module, the first transformer module and the second transformer module; then the timing control module will turn on the first transformer module and the second transformer module, based on the HVDC signals output from the PFC circuit together with an enable signal, wherein, the first transformer module converts the HVDC into a first voltage before supplying to the motherboard, and the second transformer module is configured to convert the HVDC into a second voltage before supplying to the motherboard and the OLED screen; the timing control module also controls start sequences of both the first transformer module and the second transformer module, and lights the OLED screen up after both the switch signals and the enable signals are stable concurrently.