JPS63153260U - - Google Patents
Info
- Publication number
- JPS63153260U JPS63153260U JP4473687U JP4473687U JPS63153260U JP S63153260 U JPS63153260 U JP S63153260U JP 4473687 U JP4473687 U JP 4473687U JP 4473687 U JP4473687 U JP 4473687U JP S63153260 U JPS63153260 U JP S63153260U
- Authority
- JP
- Japan
- Prior art keywords
- bias voltage
- photoreceptor
- developing
- absolute value
- light source
- 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.)
- Pending
Links
- 108091008695 photoreceptors Proteins 0.000 claims description 6
- 239000004973 liquid crystal related substance Substances 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 claims 3
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 2
Landscapes
- Optical Systems Of Projection Type Copiers (AREA)
- Magnetic Brush Developing In Electrophotography (AREA)
- Developing For Electrophotography (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Dry Development In Electrophotography (AREA)
- Liquid Crystal (AREA)
Description
第１図は、本考案の記録装置のバイアス電圧印
加部の構成図、第２図は、現像バイアスの電位図
、第３図は、本考案の記録装置を示す概略構成図
、第４図は、本考案の記録装置のタイミングチヤ
ート図、第５図は、感光体ドラムの表面電位図、
第６図は、トナー濃度と画像濃度の関係を示すグ
ラフである。
１…感光体ドラム、２…帯電器、３…液晶ヘツ
ド、４…現像器、４ａ…現像スリーブ、４ｂ…現
像剤、６…転写器、９…バイアス電圧印加部、１
０…現像剤検知回路、１１…バイアス電圧制御回
路、１２…可変バイアス電源、１３…固定バイア
ス電源、１４…記録領域検知回路、１５…電源切
換部。
FIG. 1 is a block diagram of the bias voltage applying section of the recording apparatus of the present invention, FIG. 2 is a potential diagram of the developing bias, FIG. 3 is a schematic block diagram showing the recording apparatus of the present invention, and FIG. , a timing chart of the recording device of the present invention, and FIG. 5 is a surface potential diagram of the photoreceptor drum,
FIG. 6 is a graph showing the relationship between toner density and image density. DESCRIPTION OF SYMBOLS 1... Photosensitive drum, 2... Charger, 3... Liquid crystal head, 4... Developing device, 4a... Developing sleeve, 4b... Developer, 6... Transfer device, 9... Bias voltage application section, 1
0... Developer detection circuit, 11... Bias voltage control circuit, 12... Variable bias power supply, 13... Fixed bias power supply, 14... Recording area detection circuit, 15... Power supply switching section.
Claims (1)
つて配設された前記感光体を帯電させる帯電手段
と、該帯電手段により帯電された前記感光体に光
源からの光を液晶シヤツタにより変調して照射し
て静電潜像を形成する光記録手段と、前記静電潜
像の低電位部にトナーを付着させて現像する現像
手段と、該現像手段にバイアス電圧を印加するバ
イアス電圧印加手段とを備えた記録装置において
、前記光源の消灯時に光記録手段を通過した感光
体領域が現像手段を通過するときの前記現像手段
に印加されるバイアス電圧の絶対値を前記光源の
点灯時に前記光記録手段を通過するときのバイア
ス電圧の絶対値よりも高く且つ前記トナーの濃度
に応じて可変制御するバイアス電圧制御手段を有
することを特徴とする記録装置。 A movable photoreceptor, a charging means disposed along a moving path of the photoreceptor for charging the photoreceptor, and a liquid crystal shutter modulating light from a light source onto the photoreceptor charged by the charging means. an optical recording means for irradiating the electrostatic latent image to form an electrostatic latent image; a developing means for attaching toner to a low potential portion of the electrostatic latent image and developing the image; and a bias voltage application for applying a bias voltage to the developing means. In the recording apparatus, the absolute value of the bias voltage applied to the developing means when the photoreceptor area that has passed through the optical recording means when the light source is turned off passes through the developing means is determined by the absolute value of the bias voltage applied to the developing means when the light source is turned on. A recording apparatus comprising a bias voltage control means that is higher than the absolute value of the bias voltage when the toner passes through the optical recording means and is variably controlled according to the density of the toner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4473687U JPS63153260U (en) | 1987-03-26 | 1987-03-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4473687U JPS63153260U (en) | 1987-03-26 | 1987-03-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63153260U true JPS63153260U (en) | 1988-10-07 |
Family
ID=30862825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4473687U Pending JPS63153260U (en) | 1987-03-26 | 1987-03-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63153260U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07209971A (en) * | 1993-12-18 | 1995-08-11 | Samsung Electron Co Ltd | Picture printing device |
-
1987
- 1987-03-26 JP JP4473687U patent/JPS63153260U/ja active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07209971A (en) * | 1993-12-18 | 1995-08-11 | Samsung Electron Co Ltd | Picture printing device |
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