JPH0159892U - - Google Patents

Info

Publication number
JPH0159892U
JPH0159892U JP15448087U JP15448087U JPH0159892U JP H0159892 U JPH0159892 U JP H0159892U JP 15448087 U JP15448087 U JP 15448087U JP 15448087 U JP15448087 U JP 15448087U JP H0159892 U JPH0159892 U JP H0159892U
Authority
JP
Japan
Prior art keywords
terminal
circuit
voltage dividing
display tube
fluorescent display
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
Application number
JP15448087U
Other languages
Japanese (ja)
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 JP15448087U priority Critical patent/JPH0159892U/ja
Publication of JPH0159892U publication Critical patent/JPH0159892U/ja
Pending legal-status Critical Current

Links

Landscapes

  • Electric Clocks (AREA)

Description

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

第１図は、本考案の実施例に係る時計の輝度調
整回路の回路図。第２図は、第１図のタイムチヤ
ート。 ２……時計回路、４……螢光表示管、６，８…
…抵抗、１０……第１のトランジスタ、１６……
ライトスイツチ、１８……第２のトランジスタ、
２８……パルス発生回路。 FIG. 1 is a circuit diagram of a brightness adjustment circuit for a watch according to an embodiment of the present invention. Figure 2 is the time chart of Figure 1. 2... Clock circuit, 4... Fluorescent display tube, 6, 8...
...Resistor, 10...First transistor, 16...
Light switch, 18... second transistor,
28...Pulse generation circuit.

Claims (1)

【実用新案登録請求の範囲】 時刻を計時する時計回路と、この時計回路の計
時出力を表示する螢光表示管と、外部操作に応じ
てデユーテイ比の異なるパルス列を発生するパル
ス発生回路と、ライトスイツチと、前記螢光表示
管のグリツド端子に分圧出力端子が接続された分
圧抵抗と、コレクタ端子に前記分圧抵抗を介して
電源が接続されるとともにベース端子に前記ライ
トスイツチが接続された第１のトランジスタと、 コレクタ端子に前記螢光表示管のグリツド端子
が接続されるとともにベース端子に前記パルス発
生回路の出力端子が接続された第２のトランジス
タを有することを特徴とする時計の輝度調整回路
。[Scope of Claim for Utility Model Registration] A clock circuit that measures time, a fluorescent display tube that displays the clock output of this clock circuit, a pulse generation circuit that generates pulse trains with different duty ratios in response to external operations, and a light. a switch, a voltage dividing resistor having a voltage dividing output terminal connected to the grid terminal of the fluorescent display tube, a power supply connected to the collector terminal via the voltage dividing resistor, and a base terminal connected to the light switch. and a second transistor, the collector terminal of which is connected to the grid terminal of the fluorescent display tube, and the base terminal of which is connected to the output terminal of the pulse generating circuit. Brightness adjustment circuit.
JP15448087U 1987-10-08 1987-10-08 Pending JPH0159892U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15448087U JPH0159892U (en) 1987-10-08 1987-10-08

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15448087U JPH0159892U (en) 1987-10-08 1987-10-08

Publications (1)

Publication Number Publication Date
JPH0159892U true JPH0159892U (en) 1989-04-14

Family

ID=31431247

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15448087U Pending JPH0159892U (en) 1987-10-08 1987-10-08

Country Status (1)

Country Link
JP (1) JPH0159892U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533273A (en) * 1976-06-29 1978-01-12 Toyota Motor Co Ltd Digital clock for automobile
JPS5616089B2 (en) * 1977-03-18 1981-04-14

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS533273A (en) * 1976-06-29 1978-01-12 Toyota Motor Co Ltd Digital clock for automobile
JPS5616089B2 (en) * 1977-03-18 1981-04-14

Similar Documents

Publication Publication Date Title
JPH0159892U (en)
JPS6156694U (en)
JPH0467689U (en)
JPS61120933U (en)
JPH0320581U (en)
JPS6434694U (en)
JPS62120789U (en)
JPH0167575U (en)
JPS62197094U (en)
JPS63129328U (en)
JPH02114953U (en)
JPS63152316U (en)
JPS59152863U (en) Cathode ray tube fluorescent film burnout prevention circuit
JPS63110997U (en)
JPS6437344U (en)
CN87201606U (en) Electromagnetic acoustooptical metronome
JPS63164793U (en)
JPS5998522U (en) Test circuit for push button switch lamp
JPS6023942U (en) Recording status display device
JPH0360437U (en)
JPH01154934U (en)
JPH0398491U (en)
JPH0247833U (en)
CN88200653U (en) Photometer
JPS6257400U (en)