JPS62125258U - - Google Patents
Info
- Publication number
- JPS62125258U JPS62125258U JP1360286U JP1360286U JPS62125258U JP S62125258 U JPS62125258 U JP S62125258U JP 1360286 U JP1360286 U JP 1360286U JP 1360286 U JP1360286 U JP 1360286U JP S62125258 U JPS62125258 U JP S62125258U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- electrophotographic printer
- detection voltage
- voltage
- determination circuit
- 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
- 238000001514 detection method Methods 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 1
- 108091008695 photoreceptors Proteins 0.000 description 1
Landscapes
- Combination Of More Than One Step In Electrophotography (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
第１図は本考案の電子写真方式プリンタの一実
施例におけるマーク判定回路および検出電圧追従
回路図、第２図は第１図各部の波形図、第３図は
従来の電子写真方式プリンタの説明図、第４図は
トナーマークの説明図、第５図は光電検出器の構
成図、第６図は従来のマーク判定回路説明図、第
７図は第６図の各部波形図である。
１…感光体、２…帯電器、３…レーザ光、４…
現像器、５…転写器、６…印字用紙、１１…トナ
ーマーク、１２…光電検出器、１３…発光素子、
１４…受光素子、１５…比較器、１８…検出電圧
追従回路、１９，２０，２１…抵抗、２２…コン
デンサ。
Fig. 1 is a mark judgment circuit and detection voltage tracking circuit diagram in an embodiment of the electrophotographic printer of the present invention, Fig. 2 is a waveform diagram of each part of Fig. 1, and Fig. 3 is an explanation of a conventional electrophotographic printer. 4 is an explanatory diagram of a toner mark, FIG. 5 is a configuration diagram of a photoelectric detector, FIG. 6 is an explanatory diagram of a conventional mark determination circuit, and FIG. 7 is a waveform diagram of each part of FIG. 6. 1... Photoreceptor, 2... Charger, 3... Laser light, 4...
Developing device, 5... Transfer device, 6... Printing paper, 11... Toner mark, 12... Photoelectric detector, 13... Light emitting element,
14... Light receiving element, 15... Comparator, 18... Detection voltage tracking circuit, 19, 20, 21... Resistor, 22... Capacitor.
Claims (1)
れた特定パターンのマークと、該マークを検出す
る光電検出器と、該光電検出器の検出電圧を基準
値と比較し、発生したオンオフ信号を判定信号と
するマーク判定回路とを有する電子写真方式プリ
ンタにおいて、前記マーク判定回路に、前記検出
電圧に比例する基準電圧を発生する検出電圧追放
回路が設けてあることを特徴とする電子写真方式
プリンタ。 ２ 前記マーク判定回路が前記検出電圧のピーク
値をサンプルホールドし、該サンプルホールド値
を分圧して基準電圧とするサンプルホールド回路
を有するものである実用新案登録請求の範囲第１
項記載の電子写真方式プリンタ。[Claims for Utility Model Registration] 1. In order to monitor the printing condition, a specific pattern of marks printed on printing paper, a photoelectric detector that detects the marks, and a comparison of the detection voltage of the photoelectric detector with a reference value. In an electrophotographic printer having a mark determination circuit that uses a generated on-off signal as a determination signal, the mark determination circuit is provided with a detection voltage expulsion circuit that generates a reference voltage proportional to the detection voltage. Characteristic electrophotographic printer. 2. Utility model registration claim 1, wherein the mark determination circuit has a sample and hold circuit that samples and holds the peak value of the detected voltage and divides the sample and hold value to obtain a reference voltage.
The electrophotographic printer described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1360286U JPS62125258U (en) | 1986-01-31 | 1986-01-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1360286U JPS62125258U (en) | 1986-01-31 | 1986-01-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62125258U true JPS62125258U (en) | 1987-08-08 |
Family
ID=30802814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1360286U Pending JPS62125258U (en) | 1986-01-31 | 1986-01-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62125258U (en) |
-
1986
- 1986-01-31 JP JP1360286U patent/JPS62125258U/ja active Pending
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