JPH0415084U - - Google Patents

Info

Publication number
JPH0415084U
JPH0415084U JP5302190U JP5302190U JPH0415084U JP H0415084 U JPH0415084 U JP H0415084U JP 5302190 U JP5302190 U JP 5302190U JP 5302190 U JP5302190 U JP 5302190U JP H0415084 U JPH0415084 U JP H0415084U
Authority
JP
Japan
Prior art keywords
current
value
emitting diode
light emitting
reflected light
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
Application number
JP5302190U
Other languages
Japanese (ja)
Other versions
JPH0734388Y2 (en
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP1990053021U priority Critical patent/JPH0734388Y2/en
Publication of JPH0415084U publication Critical patent/JPH0415084U/ja
Application granted granted Critical
Publication of JPH0734388Y2 publication Critical patent/JPH0734388Y2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Length Measuring Devices By Optical Means (AREA)

Description

【図面の簡単な説明】[Brief explanation of drawings]

第１図はこの考案の一実施例を示す接続図、第
２図はフオトトランジスタの特性を示す特性図、
第３図は従来の反射光センサを示す接続図。 １……ＬＥＤ、２……フオトトランジスタ、３
……用紙表面、５……ＣＰＵ、６……電流調整回
路。なお、各図中同一符号は同一または相当部分
を示すものとする。 Fig. 1 is a connection diagram showing an embodiment of this invention, Fig. 2 is a characteristic diagram showing the characteristics of a phototransistor,
FIG. 3 is a connection diagram showing a conventional reflected light sensor. 1...LED, 2...Phototransistor, 3
...Paper surface, 5...CPU, 6...Current adjustment circuit. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

【実用新案登録請求の範囲】 発光ダイオードから放射される光を物体の表面
で反射させ、反射光の強さを光電変換素子によつ
て電気信号に変換する反射光センサにおいて、 上記発光ダイオードの電源回路として設けられ
当該発光ダイオードの順方向電流を制御する電流
調整回路、 この電流調整回路により上記発光ダイオードに
流れる電流の中心値を設定し、この中心値から正
方向と負方向へ同量の電流値を変化させ、この同
量の電流値の変化による上記光電変換素子の出力
電流の正負方向の変化量を比較し、その比較結果
により上記電流の中心値を変化することによつて
最適中心電流値を決定する手段、 を備えたことを特徴とする反射光センサ。[Claims for Utility Model Registration] In a reflected light sensor that reflects light emitted from a light emitting diode on the surface of an object and converts the intensity of the reflected light into an electrical signal by a photoelectric conversion element, a power source for the light emitting diode; A current adjustment circuit that is provided as a circuit and controls the forward current of the light emitting diode, and this current adjustment circuit sets the center value of the current flowing through the light emitting diode, and from this center value, the same amount of current flows in the positive direction and the negative direction. By changing the value, comparing the amount of change in the positive and negative directions of the output current of the photoelectric conversion element due to a change in the same amount of current value, and changing the center value of the above current based on the comparison result, the optimum center current is determined. A reflected light sensor comprising means for determining a value.
JP1990053021U 1990-05-23 1990-05-23 Reflected light sensor Expired - Fee Related JPH0734388Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1990053021U JPH0734388Y2 (en) 1990-05-23 1990-05-23 Reflected light sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1990053021U JPH0734388Y2 (en) 1990-05-23 1990-05-23 Reflected light sensor

Publications (2)

Publication Number Publication Date
JPH0415084U true JPH0415084U (en) 1992-02-06
JPH0734388Y2 JPH0734388Y2 (en) 1995-08-02

Family

ID=31573840

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1990053021U Expired - Fee Related JPH0734388Y2 (en) 1990-05-23 1990-05-23 Reflected light sensor

Country Status (1)

Country Link
JP (1) JPH0734388Y2 (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61233386A (en) * 1985-04-08 1986-10-17 Seruko Kk Material body detector
JPH02816U (en) * 1988-06-13 1990-01-05

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61233386A (en) * 1985-04-08 1986-10-17 Seruko Kk Material body detector
JPH02816U (en) * 1988-06-13 1990-01-05

Also Published As

Publication number Publication date
JPH0734388Y2 (en) 1995-08-02

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Legal Events

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LAPS Cancellation because of no payment of annual fees