JPH01125454U - - Google Patents
Info
- Publication number
- JPH01125454U JPH01125454U JP1886988U JP1886988U JPH01125454U JP H01125454 U JPH01125454 U JP H01125454U JP 1886988 U JP1886988 U JP 1886988U JP 1886988 U JP1886988 U JP 1886988U JP H01125454 U JPH01125454 U JP H01125454U
- Authority
- JP
- Japan
- Prior art keywords
- potential
- bias voltage
- photoreceptor
- high potential
- developing means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 108091008695 photoreceptors Proteins 0.000 claims 5
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Developing For Electrophotography (AREA)
- Cleaning In Electrography (AREA)
Description
第１図は本実施例の液晶プリンタの構成図、第
２図は本実施例の液晶プリンタの動作を説明する
タイムチヤート、第３図は現像バイアスの印加タ
イミングを説明するタイムチヤートである。
１……感光体ドラム、２……帯電器、３……液
晶ヘツド、４……現像器、９……現像ロール、１
０……高圧電源。
FIG. 1 is a block diagram of the liquid crystal printer of this embodiment, FIG. 2 is a time chart explaining the operation of the liquid crystal printer of this embodiment, and FIG. 3 is a time chart explaining the application timing of the developing bias. 1...Photosensitive drum, 2...Charger, 3...Liquid crystal head, 4...Developer, 9...Developer roll, 1
0...High voltage power supply.
Claims (1)
電させる帯電手段と、該帯電手段により帯電され
た前記感光体に露光を行ない前記感光体上に静電
潜像を形成する露光手段と、バイアス電圧が印加
され前記静電潜像を反転現像する現像手段と、該
現像手段へ前記バイアス電圧を印加するバイアス
電圧印加手段とを有する画像形成装置において、 前記バイアス電圧印加手段は前記感光体の非帯
電電位に略等しい低電位と前記感光体の帯電電位
に略等しい第１の高電位と該第１の高電位より低
い第２の高電位とを選択的に出力可能であり、前
記感光体の一回転時に前記低電位と前記第２の高
電位のバイアス電圧を順次前記現像手段へ出力し
、前記低電位と前記第２の高電位のバイアス電圧
切換部が前記現像手段を通過する前記感光体の二
回転時以降前記第１の高電位のバイアス電圧を前
記現像手段へ出力することを特徴とする画像形成
装置。[Claims for Utility Model Registration] At least a movable photoreceptor, charging means for charging the photoreceptor, and exposing the photoreceptor charged by the charging means to form an electrostatic latent image on the photoreceptor. An image forming apparatus comprising: an exposure means for forming an electrostatic latent image; a developing means to which a bias voltage is applied and reversely develops the electrostatic latent image; and a bias voltage applying means for applying the bias voltage to the developing means. The means is capable of selectively outputting a low potential approximately equal to an uncharged potential of the photoconductor, a first high potential approximately equal to a charged potential of the photoconductor, and a second high potential lower than the first high potential. The bias voltages of the low potential and the second high potential are sequentially outputted to the developing means during one rotation of the photoconductor, and the bias voltage switching unit of the low potential and the second high potential switches the bias voltage of the low potential and the second high potential to the developing means. An image forming apparatus characterized in that the first high-potential bias voltage is output to the developing means after the second rotation of the photoreceptor passing through the means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1886988U JPH0432685Y2 (en) | 1988-02-16 | 1988-02-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1886988U JPH0432685Y2 (en) | 1988-02-16 | 1988-02-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01125454U true JPH01125454U (en) | 1989-08-28 |
| JPH0432685Y2 JPH0432685Y2 (en) | 1992-08-06 |
Family
ID=31233890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1886988U Expired JPH0432685Y2 (en) | 1988-02-16 | 1988-02-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0432685Y2 (en) |
-
1988
- 1988-02-16 JP JP1886988U patent/JPH0432685Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0432685Y2 (en) | 1992-08-06 |
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