×

Power supply circuit, voltage conversion circuit, semiconductor device, display device, display panel, and electronic equipment

  • US 20050052447A1
  • Filed: 09/28/2004
  • Published: 03/10/2005
  • Est. Priority Date: 09/14/2001
  • Status: Active Grant
First Claim
Patent Images

1. A voltage conversion circuit which generates an output potential that is negative based on a first potential, comprising:

  • a capacitor which capacitively couples a node to which a timing signal changing between given potentials is supplied and an output power supply line to which the output potential is supplied;

    a negative power supply generating circuit which generates a negative potential based on the first potential based on a difference between the first potential and an input potential which is positive based on the first potential; and

    a switching element which is inserted between a node to which the negative power supply potential is supplied and the output power supply line, and controlled based on a given switching control signal, wherein the timing signal and the switching control signal change in synchronization with each other.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×