Sharp Kabushiki Kaisha Corporation

Koji Tsukamoto

Kenji Tani

Hirohito Morioka

Kazuya Masuda

Sohichi Yoshimura

Yoshikazu Kondoh

Kouichi Eto

Takahiro Kawakami

Mariko Arai

Yoshinori Nakahira

Masaaki Kawakami

Kimiko Watanabe

Toshinori Tsujii

Takashi Ide

Hiroki Eto

Takashi Sugitoh

Shirou Wakahara

Takasumi Wada

An object of the invention is to provide a display device of an image forming apparatus capable of displaying information that the user wants to obtain in a visually easy-to-recognize manner. In a compound image forming apparatus provided with: one of original reading means for reading image information from an original, image receiving means for receiving image information from a terminal connected to a network and a line image receiving means for receiving image information from a telephone line; image forming means for forming an image based on the image information obtained by the means; and a display portion for displaying the condition of the apparatus, a display condition control portion is provided that changes the display condition of the display portion to a visually easy-to-recognize condition when the condition of the compound image forming apparatus is changed.

Image forming apparatus

An object of the invention is to provide a display device of an image forming apparatus capable of displaying information that the user wants to obtain in a visually easy-to-recognize manner. In a complex image forming apparatus provided with: one of original reading means for reading image information from an original, image receiving means for receiving image information from a terminal connected to a network and a line image receiving means for receiving image information from a telephone line; image forming means for forming an image based on the image information obtained by the means; and a display portion for displaying the condition of the apparatus, a display condition control portion is provided that changes the display condition of the display portion to a visually easy-to-recognize condition when the condition of the complex image forming apparatus is changed.

An object of the present invention is to provide an image forming apparatus for forming images which are always and stably high quality regardless of changes of ambient conditions. In the image forming apparatus, a counter electrode is disposed facing a toner holder for holding at least one color toner, to generate a potential difference between the toner holder and the counter electrode by use of various types of power supplies. Between the toner holder and the counter electrode, a counter electrode is interposed, which is provided with a plurality of gates disposed on an insulating substrate and electrode groups respectively disposed around the plurality of gates. According to the potential difference between the toner holder and the counter electrode, it is controlled whether or not the toner is caused to pass through the gates. In the image forming apparatus, a resistance value of a cleaning member is detected for removing the toner stuck on the control electrode. On the basis of the detected resistance value, ambient conditions are determined. On the basis of the conditions, a state of at least one of elements in the image forming apparatus is controlled.

An image forming apparatus has a toner carrier roller, a back electrode which is located so as to face the toner carrier roller, a voltage source for applying a voltage which generates an electric field for making toner fly from the toner carrier roller to the back electrode, a control electrode which has many openings through which the toner is allowed to pass and first and second conductive layers formed around the openings and is formed so that at least portions of the first and second conductive layers which surround the openings do not overlap each other in a direction where the toner flies from the toner carrier roller to the back electrode, and a voltage source for applying a voltage which controls the toner passing through the opening according to an image signal. As a result, an electrostatic capacity is hardly formed between the first conductive layer and the second conductive layer, thereby suppressing a fall in response characteristic to the toner flying control due to the electrostatic capacity.

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Yamatokoriyama, Japan

Koji Tsukamoto