CN2246304Y

CN2246304Y - World clock

Info

Publication number: CN2246304Y
Application number: CN 95204847
Authority: CN
Inventors: 姜明; 吕威群; 林芝涛
Original assignee: HUIPU ELECTRONIC ENGINEERING Co QINGDAO CITY
Current assignee: HUIPU ELECTRONIC ENGINEERING Co QINGDAO CITY
Priority date: 1995-03-15
Filing date: 1995-03-15
Publication date: 1997-01-29
Anticipated expiration: 2005-03-15

Abstract

The utility model relates to a world clock which is composed of a world map which is combined with flat plate blocks and used as a panel, a wall-hanging type machine enclosure which is provided with display windows at corresponding time zone positions and an SCM circuit which drives a nixie tube display as a machine core. The utility model has the advantages of bright and visual display, night lighting, convenient time adjustment, accurate time running, etc.

Description

World clock

The utility model relates to a kind of World clock, belongs to clock field.

Disclose a kind of " World clock " in the Chinese patent 88218407, it mainly is made up of clock movement and terrestrial globe, translucent cover etc.A kind of " practical multi-functional universal time-piece " disclosed in the Chinese patent 92223949, hour indicator, minute hand, second hand, auxiliary hour hands, auxiliary minute hand, auxiliary second hand that it rotates by casing, movement, dial plate, as clock are formed, above-mentioned World clock all adopts physical construction, complex structure, the cost of manufacture height, and pointer-type is shown in and is unsuitable for remote or the dark place is watched.

The purpose of this utility model is a kind of time value that can manifest the representative main cities in name time zone, the world simultaneously directly perceived, eye-catching of design, and adjusts World clock easy to use.

For achieving the above object, the utility model has adopted following design: a kind of World clock is by casing, display window, movement and power supply etc. are partly formed, wherein casing is that the wall-hanging structure of panel is formed by the world map with plane plate combination, and have display window in each position, corresponding time zone of panel, movement is by single-chip microcomputer address/data latch, program storage, data-carrier store, the display keyboard controller, the scm application system that chain drum interface and keyboard are formed, outputting data signals is by the data transmission driver, the data serial shift unit, display driver chip and data pipe connect and compose according to a conventional method.

Now in conjunction with the accompanying drawings the utility model is done to describe further:

Fig. 1 is the utility model casing synoptic diagram

Fig. 2 is the utility model movement governor circuit structural representation

Fig. 3 is the utility model movement display circuit structural representation

Fig. 4 is the utility model workflow synoptic diagram

The utility model is made up of casing, display window movement and power supply, and as shown in Figure 1, casing is that the wall-hanging structure of shallow shell of panel 1 is formed by the world map with plane plate combination, and is in panel 1 each position, corresponding time zone display window 2 is arranged.As shown in Figure 2, movement is by CPU3 connecting bus address/data latch 4, program storage 5, data-carrier store 6, display keyboard controller 7, keyboard interface 8 and keyboard 9, as Fig. 2, shown in 3, CPU3 organizes the display circuit of cascade each other by interface 10 connections more, display circuit is by data transmission chip for driving 12, data serial shift unit 3, display driver chip 14 and four seven segment digital tubes 15 constitute a time zone display module, wherein show before the double figures sign indicating number " time ", back double figures sign indicating number pipe shows " branch ", and " time ", be connected with " second sudden strain of a muscle " circuit of LED (16) in the middle of " branch " circuit, as shown in Figure 4, the utility model workflow is: after the energized, CPU3 obtains Beijing time numerical value from data-carrier store (6), CPU3 draws each big city time value of the world by conversion, then by interface 10, data serial shift register 13, display driver chip 14 drive digital preceding 5 and show, the CPU3 wait was regularly interrupted in one minute then, if the application of interruption is arranged, then Beijing time value changed one minute, and this value was sent in the data-carrier store 6 temporary, repeated said process then again.Display keyboard controller 7, keyboard interface 8 and keyboard 9 are used to realize the time parameter correction.As shown in Figure 2, CPU3 can adopt Intel Company's single-chip microcomputer 8031, bus address/data latches 4 can adopt 74L5373 chip, program storage can adopt chips such as 2716,2732,2728,27256, data-carrier store 6 can adopt chips such as 6216,62128, display keyboard controller 7 can adopt chips such as 8155,8255, as shown in Figure 2, data transmission driver 12 can adopt the 74HC244 chip, data serial shift unit 13 can adopt 4094 chips, and display driver chip 14 can adopt the ULN2803 chip.

The utility model is that background adopts charactron to show with the world map, eye-catching directly perceived, owing to adopt integrated circuit (IC) design, punctual timing, convenient during the school, system provides three to revise keys and carry out the time calibration, the year, month, day of adjustable Beijing time, week, the time and branch; Outside power down, system clock can work on, and after re-powering, system shows need not calibrate.

Claims

1, a kind of World clock is made up of casing, display window movement and power supply, it is characterized in that:

A, casing are that the wall-hanging structure of shallow shell of panel (1) is formed by the world map with the combination of plane plate, and have display window (2) in each position, corresponding time zone of panel (1).

The single chip circuit that b, movement are made up of CPU (3) bus address/data latches (4), program storage (5), data-carrier store (6), display keyboard controller (7), keyboard interface (8) and keyboard (9), CPU (3) organizes the display circuit of cascade each other by interface (10) connection 3-16 simultaneously.

2, World clock according to claim 1 is characterized in that: display circuit is to connect four data serial shift units (13), display driver chip (14) and digital preceding (15) formation by data transmission chip for driving (12).