公开(公告)号：US20210333736A1

公开(公告)日：2021-10-28

申请号：US16605953

申请日：2018-04-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Guang Jin Li ,  Jin Zou

IPC: G03G15/00 ,  G03G15/095

Abstract: In one example of the disclosure, a first voltage is provided to an electrode of a development assembly during a first printing operation. The developer assembly includes a current-resistant coating and is to develop print fluid with conductive particles. Contemporaneous with the providing of the first voltage to the electrode, a second voltage is provided to a squeegee roller of the developer assembly. Data indicative of a measurement of optical density of a first image printed utilizing the developer assembly is received. During a second printing operation, if the measured optical density is outside a target optical density, contemporaneously the first voltage is provided to the electrode and a third voltage to the squeegee roller to adjust image optical density.