JPH0411492U - - Google Patents
Info
- Publication number
- JPH0411492U JPH0411492U JP5191490U JP5191490U JPH0411492U JP H0411492 U JPH0411492 U JP H0411492U JP 5191490 U JP5191490 U JP 5191490U JP 5191490 U JP5191490 U JP 5191490U JP H0411492 U JPH0411492 U JP H0411492U
- Authority
- JP
- Japan
- Prior art keywords
- signal
- circuit
- outputs
- correction
- time
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Electric Clocks (AREA)
Description
第１図は本考案に係る自動車用時計の回路例を
示す図にして、第２図は該実施例における各部信
号を示すタイムチヤート図、第３図乃至第５図は
各々操作検出回路の他の実施例を示す図にして、
第６図は輝度変更回路の他の実施例を示す図であ
り、第７図は輝度変更回路の第２実施例における
タイムチヤート図、第８図は従来の自動車用時計
における回路の一例を示す図にして、第９図は従
来の回路における信号を示すタイムチヤート図で
ある。
１０……時計回路、１４……ライトスイツチ、
２０……修正スイツチ回路、３０……基準信号発
生回路、３８……時刻修正回路、４０……カウン
タ回路、５０……表示回路、５４……ドライバ、
５６……表示部、６０……減光回路、７０，１２
０，１４０，１５０……操作検出回路、９０，１
６０……輝度変更回路。
FIG. 1 is a diagram showing an example of a circuit of an automobile watch according to the present invention, FIG. 2 is a time chart showing signals of various parts in the embodiment, and FIGS. As a diagram showing an example of
FIG. 6 is a diagram showing another embodiment of the brightness changing circuit, FIG. 7 is a time chart diagram in the second embodiment of the brightness changing circuit, and FIG. 8 is a diagram showing an example of a circuit in a conventional automobile watch. FIG. 9 is a time chart showing signals in a conventional circuit. 10...Clock circuit, 14...Light switch,
20... Correction switch circuit, 30... Reference signal generation circuit, 38... Time correction circuit, 40... Counter circuit, 50... Display circuit, 54... Driver,
56... Display unit, 60... Dimming circuit, 70, 12
0,140,150...operation detection circuit, 90,1
60... Brightness change circuit.
Claims (1)
信号発生回路と、 基準信号発生回路からの基準信号を計時して時
刻信号を出力するカウンタ回路と、 カウンタ回路からの時刻信号に基いて時刻を表
示する表示回路と、 外部操作可能な複数のスイツチを有し、該スイ
ツチが操作されると前記表示回路の表示時刻を修
正する為の操作信号を出力する修正スイツチ回路
と、 修正スイツチ回路からの操作信号に応答して前
記カウンタ回路に修正信号を出力する時刻修正回
路と、 を有する自動車用の時計回路において、 前記修正スイツチ回路における特定の２つのス
イツチが同時にオン状態とされたことを検出して
切換信号を出力する操作検出回路と、 ライト信号が入力されないときは一定レベルの
連続信号を輝度制御信号として出力し、ライト信
号が入力されると前記基準信号発生回路からの基
準信号に基くパルス信号を輝度制御信号として出
力し、且つ、前記操作検出回路からの切換信号が
入力されるとデユーテイ比を順次変更したパルス
信号を輝度制御信号として出力する輝度変更回路
と、 を設けたことを特徴とする自動車用時計。[Claims for Utility Model Registration] A reference signal generation circuit that outputs a plurality of reference signals with different frequencies, a counter circuit that measures the reference signal from the reference signal generation circuit and outputs a time signal, and a time signal from the counter circuit. a display circuit that displays the time based on a signal; and a correction switch circuit that has a plurality of externally operable switches and outputs an operation signal for correcting the display time of the display circuit when the switches are operated. , a time correction circuit that outputs a correction signal to the counter circuit in response to an operation signal from a correction switch circuit, and a time correction circuit for an automobile having: a time correction circuit that outputs a correction signal to the counter circuit in response to an operation signal from a correction switch circuit; an operation detection circuit that detects that the light signal has been input and outputs a switching signal; and an operation detection circuit that outputs a continuous signal at a constant level as a brightness control signal when no light signal is input, and when a light signal is input, from the reference signal generation circuit. a brightness changing circuit that outputs a pulse signal based on the reference signal as a brightness control signal, and outputs a pulse signal whose duty ratio is sequentially changed as a brightness control signal when a switching signal from the operation detection circuit is input; An automobile watch characterized by being provided with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990051914U JPH0634715Y2 (en) | 1990-05-18 | 1990-05-18 | Car clock |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990051914U JPH0634715Y2 (en) | 1990-05-18 | 1990-05-18 | Car clock |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0411492U true JPH0411492U (en) | 1992-01-30 |
| JPH0634715Y2 JPH0634715Y2 (en) | 1994-09-07 |
Family
ID=31571771
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990051914U Expired - Lifetime JPH0634715Y2 (en) | 1990-05-18 | 1990-05-18 | Car clock |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0634715Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58173489A (en) * | 1982-04-05 | 1983-10-12 | Seiko Instr & Electronics Ltd | Liquid crystal driving circuit of electronic clock |
| JPH0184091U (en) * | 1987-11-26 | 1989-06-05 |
-
1990
- 1990-05-18 JP JP1990051914U patent/JPH0634715Y2/en not_active Expired - Lifetime
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58173489A (en) * | 1982-04-05 | 1983-10-12 | Seiko Instr & Electronics Ltd | Liquid crystal driving circuit of electronic clock |
| JPH0184091U (en) * | 1987-11-26 | 1989-06-05 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0634715Y2 (en) | 1994-09-07 |
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