초록 ▼

A developing apparatus includes a developer carrying member, disposed opposed to an image bearing member, for carrying a developer; a developing bias voltage applying source for applying a developing bias voltage having an oscillating component to the developer carrying member to develop an electros

A developing apparatus includes a developer carrying member, disposed opposed to an image bearing member, for carrying a developer; a developing bias voltage applying source for applying a developing bias voltage having an oscillating component to the developer carrying member to develop an electrostatic latent image formed on the image bearing member; wherein 10.0≤T11/(T11+T12)×100≤90.0, where T11 is a time period of a first step in which an electric field is formed in a direction for directing the developer from the developer carrying member toward the image bearing member in one cycle of the oscillating component of the developing bias voltage applied by the developing bias application source, and T12 is a time period of a third step between the first step and a second step in which an electric field is formed in a direction for directing the developer from the image bearing member to the developer carrying member, and T11/(T11+T12) is an inclination of the developing bias voltage.

대표청구항 ▼

A developing apparatus comprising: a developer carrying member, disposable opposite an image bearing member, for carrying a developer; electric field forming means for forming, between an image bearing member and said developer carrying member, an alternating electric field including alternatingly r

A developing apparatus comprising: a developer carrying member, disposable opposite an image bearing member, for carrying a developer; electric field forming means for forming, between an image bearing member and said developer carrying member, an alternating electric field including alternatingly repeating a first electric field having a constant intensity for a predetermined period for directing developer toward the image bearing member and a second electric field having a constant intensity for a predetermined period for directing developer toward said developer carrying member; wherein a transition of the alternating electric field from the first electric field to the second electric field is substantially sharp, and a transition of the alternating electric field from the second electric field to the first electric field is substantially gradual.