CN205644074U - Gps timing digital display screen - Google Patents

Abstract

The utility model discloses a GPS timing digital display screen, include: GPS receives chip, real -time clock chip, singlechip, digital tube drive chip and digital display, wherein: GPS receipt chip and real -time clock chip all connect the input of singlechip, the output termination digital tube drive chip input end of singlechip, the output termination digital display input of digital tube drive chip. This scheme is passed through GPS and is received chip receipt GPS satellite signal to issue CPU with the GPS signal of receiving (including the time) with the form of serial ports data, CPU has realized automatic timing, has solved the not enough of present mechanical timing, in addition, select for use integrated digital display screen to be display element, integrated digital display screen adopts a deisgn type, shows that the uniformity is good, and the colour difference is little, not enough among the solution prior art that intensity balancing can be fine.

Description

Digital display screen during GPS school

Technical field

This utility model relates to digital dock collimation technique field, particularly relates to digital display screen during a kind of GPS school.

Background technology

The development of science and technology, the occasion of electronic clock application is more and more universal, such as automobile, bank, workshop etc..Along with life The quickening that movable joint is played, people are more and more higher to the accuracy requirement of time, it is desirable to when digital dock can show current accurately Between, and there is error the time that electronic product shows, thus requires regularly to be calibrated digital dock, the time Cycle during accuracy requirement more colleges and universities is the shortest.

Fig. 1 is the internal structure schematic diagram of existing digital dock, is received by single-chip microcomputer in the most existing scheme The basal latency of real-time clock, is then calibrated basal latency by mechanical adjustment button, and single-chip microcomputer is after calibration Time is sent to charactron driving chip, and charactron driving chip drives corresponding digital according to the time that single-chip microcomputer sends Pipe demonstrates the time.When the real-time clock energy holding time after system cut-off, but owing to the crystal oscillator of real-time clock has error, Accumulation just has the bigger overall time difference for a long time, at this moment needs again to be entered the time of digital dock by mechanical button Row calibration.But, by regulation mechanical button realize the plus-minus of time come school time, during this school, mode can be given and be installed operation Proposing more complicated requirement, the occasion at limited space operates very inconvenient, intelligent, percent of automatization is low.

Additionally, with the raising of people's living standard, the requirement to display is more and more higher, it is desirable to display device shows Brightness, color consistency are good, and aberration is little.The display unit selected due to existing digital dock is single charactron, single Individual charactron is due to manufacturing process, and the problem such as the concordance of device can cause the color of display and brightness inconsistent, can be coloured The problem of difference.

Utility model content

Digital display screen when the purpose of this utility model is to provide a kind of GPS school, it is achieved that automatic correcting time, and improve aobvious Show effect.

The purpose of this utility model is achieved through the following technical solutions:

Digital display screen during a kind of GPS school, including: GPS receiver chip, real-time timepiece chip, single-chip microcomputer, charactron Driving chip and digital display screen；Wherein:

Described GPS receiver chip and real-time timepiece chip all connect the input of single-chip microcomputer；The output termination number of described single-chip microcomputer Code pipe driving chip input, the output termination digital display screen input of described charactron driving chip.

Further, described real-time timepiece chip is connected to button cell.

Further, described GPS receiver chip is connected with the 3.3V power output end of power supply chip A.

Further, described single-chip microcomputer, charactron driving chip and digital display screen all with the 5V unidirectional current of power supply chip B Source output terminal is connected, and the 12V power input of this power supply chip B connects external power source.

The technical scheme provided by above-mentioned this utility model is it can be seen that receive gps satellite by GPS receiver chip and believe Number, and the gps signal (including the time) received is issued CPU, CPU with the form of serial data achieve automatic school Time, solve deficiency during the most mechanical school；Additionally, select integrated digital display screen to make display unit, integrated Digital display screen uses one-step building design, and display consistency is good, and aberration is little, and luminance proportion can solve existing skill Deficiency in art.

Accompanying drawing explanation

In order to be illustrated more clearly that the technical scheme of this utility model embodiment, in embodiment being described below required for make Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only more of the present utility model implement Example, from the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to according to these Accompanying drawing obtains other accompanying drawings.

The internal structure schematic diagram of the existing digital dock that Fig. 1 provides for this utility model background technology；

The structural representation of digital display screen during a kind of GPS school that Fig. 2 provides for this utility model embodiment；

The circuit diagram of the GPS receiver chip that Fig. 3 provides for this utility model embodiment；

The circuit diagram of the power supply chip A that Fig. 4 provides for this utility model embodiment；

The circuit diagram of the power supply chip B that Fig. 5 provides for this utility model embodiment；

The circuit diagram of the single-chip microcomputer that Fig. 6 provides for this utility model embodiment；

The circuit diagram of the charactron driving chip that Fig. 7 provides for this utility model embodiment；

The circuit diagram of the digital display screen that Fig. 8 provides for this utility model embodiment；

The circuit diagram of the real-time timepiece chip that Fig. 9 provides for this utility model embodiment；

The circuit diagram of the button cell that Figure 10 provides for this utility model embodiment.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out clearly Chu, it is fully described by, it is clear that described embodiment is only a part of embodiment of this utility model rather than all Embodiment.Based on embodiment of the present utility model, those of ordinary skill in the art are not making creative work premise Lower obtained every other embodiment, broadly falls into protection domain of the present utility model.

The structural representation of digital display screen during a kind of GPS school that Fig. 2 provides for this utility model embodiment.Such as Fig. 2 institute Showing, it specifically includes that GPS receiver chip, real-time timepiece chip, single-chip microcomputer, charactron driving chip and number are aobvious Display screen；Wherein:

Described GPS receiver chip and real-time timepiece chip all connect the input of single-chip microcomputer；The output termination number of described single-chip microcomputer Code pipe driving chip input, the output termination digital display screen input of described charactron driving chip.

In the present embodiment, described real-time timepiece chip is connected to button cell.

In the present embodiment, described GPS receiver chip is connected with the 3.3V power output end of power supply chip A.

In the present embodiment, described single-chip microcomputer, charactron driving chip and digital display screen all with the 5V direct current of power supply chip B Power output end is connected, and the 12V power input of this power supply chip B connects external power source.

During above-mentioned GPS school, the operation principle of digital display screen is as follows: use GPS receiver chip to receive satellite-signal, connecing The satellite received issues single-chip microcomputer fiducial time, and fiducial time is adjusted, after adjustment by single-chip microcomputer according to local time zone Time is exactly the local zone time of standard.Single-chip microcomputer issues charactron driving chip the standard time, and driving chip is according to monolithic The time that machine sends drives the digital display screen display time.Thus it is real-time by GPS calibration numerical monitor to realize intelligence The time of screen, eliminate the artificial work regularly being gone prover time by mechanical key.

In the present embodiment, GPS receiver chip effectively receives satellite-signal by external passive antenna, and GPS receiver chip can Selecting the VK1097U7M3 of Shenzhen Wei Ke communication company, its circuit diagram is as shown in Figure 3.

In the present embodiment, internal 5V Power convert is become 3.3V power supply to provide electricity to GPS receiver chip by power supply chip A Source.Power supply chip A can be selected for AMS1117-3.3, and its circuit diagram is as shown in Figure 4.

In the present embodiment, the 12V Power convert that outside is inputted by power supply chip B becomes 5V DC source aobvious to single-chip microcomputer, number Display screen and digital pipe driving chip provide 5V working power.Power supply chip Type B number can be L7805CV, and its circuit diagram is such as Shown in Fig. 5.

In the present embodiment, single-chip microcomputer can select 15W408AS as master cpu, and master cpu is responsible for resolving GPS core The satellite-signal that sheet sends, and receive the time of real-time clock, the time after calibration is issued charactron driving chip.Single The circuit diagram of sheet machine is as shown in Figure 6.Single-chip microcomputer is also reserved ISP as can be seen from Figure 6 burn in sequence of threads load ports, convenience Enter program and the upgrading of follow-up program.

In the present embodiment, charactron driving chip drives digital display screen to show according to the time that single-chip microcomputer sends, charactron Driving chip can be selected for TM1629A, and its circuit diagram is as shown in Figure 7.

In the present embodiment, digital display screen can be selected for XSP11045W, and this display screen die sinking one-step building produces, can be very well Ensure display brightness and the concordance of aberration, its circuit diagram is as shown in Figure 8.

In the present embodiment, real-time timepiece chip can be selected for PCF8563, and its circuit diagram is as shown in Figure 9.

In the present embodiment, button cell internal circuit is as shown in Figure 10.

In this utility model such scheme, receive gps satellite signal, and the GPS letter that will receive by GPS receiver chip Number (including the time) issues CPU, CPU with the form of serial data and achieves automatic correcting time, solves machinery school at present Time deficiency；Additionally, select integrated digital display screen to make display unit, it is fixed that integrated digital display screen uses once Type designs, and display consistency is good, and aberration is little, and luminance proportion can solve deficiency of the prior art.

The above, only this utility model preferably detailed description of the invention, but protection domain of the present utility model not office Being limited to this, any those familiar with the art, in the technical scope that this utility model discloses, can readily occur in Change or replacement, all should contain within protection domain of the present utility model.Therefore, protection domain of the present utility model Should be as the criterion with the protection domain of claims.

Claims (4)

1. digital display screen during a GPS school, it is characterised in that including: GPS receiver chip, real-time timepiece chip, Single-chip microcomputer, charactron driving chip and digital display screen；Wherein:

Described GPS receiver chip and real-time timepiece chip all connect the input of single-chip microcomputer；The output termination number of described single-chip microcomputer Code pipe driving chip input, the output termination digital display screen input of described charactron driving chip.

Digital display screen during a kind of GPS school the most according to claim 1, it is characterised in that described real-time clock core Button cell it is connected on sheet.

Digital display screen during a kind of GPS school the most according to claim 1, it is characterised in that described GPS receiver core Sheet is connected with the 3.3V power output end of power supply chip A.

Digital display screen during a kind of GPS school the most according to claim 1, it is characterised in that described single-chip microcomputer, number Code pipe driving chip and digital display screen are all connected with the 5V DC power output end of power supply chip B, this power supply chip B's 12V power input connects external power source.