JPH0360437U - - Google Patents
Info
- Publication number
- JPH0360437U JPH0360437U JP12009689U JP12009689U JPH0360437U JP H0360437 U JPH0360437 U JP H0360437U JP 12009689 U JP12009689 U JP 12009689U JP 12009689 U JP12009689 U JP 12009689U JP H0360437 U JPH0360437 U JP H0360437U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- switch
- duty
- outputs
- 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
- 238000005286 illumination Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Electric Clocks (AREA)
- Arrangements Of Lighting Devices For Vehicle Interiors, Mounting And Supporting Thereof, Circuits Therefore (AREA)
Description
第１図は本考案の一実施例に係る自動車用時計
の輝度調整回路の回路図、第２図乃至第４図は第
１図における信号のタイムチヤートである。
２……計時回路、１０……表示回路、１６……
表示部、１８……アクセサリスイツチ、２０……
外部スイツチ、２２……ライトスイツチ、２４…
…輝度調節信号出力回路、３２……スイツチ切換
回路、３８……デユーテイ発生回路、４８……デ
ユーテイ選択回路、８０……輝度信号出力回路。
FIG. 1 is a circuit diagram of a brightness adjustment circuit for an automobile watch according to an embodiment of the present invention, and FIGS. 2 to 4 are time charts of signals in FIG. 1. 2...Clock circuit, 10...Display circuit, 16...
Display section, 18...Accessory switch, 20...
External switch, 22...Light switch, 24...
...Brightness adjustment signal output circuit, 32...Switch switching circuit, 38...Duty generation circuit, 48...Duty selection circuit, 80...Brightness signal output circuit.
Claims (1)
て表示信号を出力する表示回路と、 前記表示信号に基づいて時刻を表示する表示部
と、 外部操作可能なアクセサリスイツチと、 該アクセサリスイツチがオフ状態のときに前記
表示部を点灯させる外部スイツチと、 インストウルメントパネルに設けられた計器の
照明を点灯させるライトスイツチと、 前記インストウルメントパネルに設けられた計
器の照明の輝度を調節するための輝度調節信号を
出力する輝度調節信号出力回路と、 を備えた自動車用時計の輝度調整回路において、 前記アクセサリスイツチがオフ状態のときに前
記外部スイツチからの操作信号に応答して点灯信
号を出力し、かつ前記アクセサリスイツチがオン
状態のときに点灯信号を出力すると共に前記操作
信号に応答してデユーテイ選択始動信号を出力す
るスイツチ切換回路と、 前記輝度調節信号と前記計時回路からの第１の
クロツク信号に応答して異なつたデユーテイ比の
パルス群を発生するデユーテイ発生回路と、 前記スイツチ切換回路からのデユーテイ選択始
動信号と前記ライトスイツチからの信号に応答し
て前記デユーテイ発生回路から出力される異なつ
たデユーテイ比のパルスを前記計時回路からの第
２のクロツク信号に同期して順次切り換えて出力
するデユーテイ選択回路と、 該デユーテイ選択回路が出力するパルスと前記
スイツチ切換回路からの点灯信号と前記ライトス
イツチからの信号に応答して表示回路に選択され
た輝度の信号を印加する輝度信号出力回路と、 を設けたことを特徴とする自動車用時計の輝度調
整回路。[Claims for Utility Model Registration] A clock circuit that measures time, a display circuit that outputs a display signal based on a clock signal output from the clock circuit, and a display section that displays time based on the display signal. , an externally operable accessory switch; an external switch that lights up the display section when the accessory switch is in the OFF state; a light switch that lights up the lights of the instruments provided on the instrument panel; A brightness adjustment signal output circuit for outputting a brightness adjustment signal for adjusting the brightness of illumination of an instrument provided on a panel; a switch switching circuit that outputs a lighting signal in response to an operation signal from an external switch, outputs a lighting signal when the accessory switch is in an on state, and outputs a duty selection start signal in response to the operation signal; , a duty generation circuit that generates a group of pulses with different duty ratios in response to the brightness adjustment signal and a first clock signal from the timer circuit; and a duty selection start signal from the switch switching circuit and from the light switch. a duty selection circuit that sequentially switches and outputs pulses with different duty ratios output from the duty generation circuit in response to a signal from the duty generation circuit in synchronization with a second clock signal from the time measurement circuit; A brightness signal output circuit that applies a selected brightness signal to a display circuit in response to the output pulse, the lighting signal from the switch switching circuit, and the signal from the light switch. Brightness adjustment circuit for commercial watches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989120096U JPH0613012Y2 (en) | 1989-10-13 | 1989-10-13 | Brightness adjustment circuit for automobile watches |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989120096U JPH0613012Y2 (en) | 1989-10-13 | 1989-10-13 | Brightness adjustment circuit for automobile watches |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0360437U true JPH0360437U (en) | 1991-06-13 |
| JPH0613012Y2 JPH0613012Y2 (en) | 1994-04-06 |
Family
ID=31668185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989120096U Expired - Lifetime JPH0613012Y2 (en) | 1989-10-13 | 1989-10-13 | Brightness adjustment circuit for automobile watches |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0613012Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678774A (en) * | 2012-05-03 | 2012-09-19 | 江苏新瑞戴维布朗齿轮系统有限公司 | Curved gear coupling |
-
1989
- 1989-10-13 JP JP1989120096U patent/JPH0613012Y2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678774A (en) * | 2012-05-03 | 2012-09-19 | 江苏新瑞戴维布朗齿轮系统有限公司 | Curved gear coupling |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0613012Y2 (en) | 1994-04-06 |
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