KR200417681Y1 - Led signboard system presenting a precise clock using a low-cost time correction method - Google Patents

Abstract

The present invention relates to a display system and a method that can correct the current time using an Internet time server as a more effective and cost-saving method for the accurate representation of time in the display of the display.

Timeserver, scoreboard, clock

Description

Led signboard system presenting a precise clock using a low-cost time correction method}

1 is a system configuration diagram of the present invention

2 is a system flow diagram of the present invention
3 is a detailed diagram of time synchronization between a display board and a time server;

The electric signboard is a medium-large structure that displays letters or pictures by using a plurality of LED light emitting devices, and is installed on the roadside or on the roof of a building for many people to see, so that various situations can be informed or advertised through letters or pictures. . In addition, it has a clock function that informs the current time in the middle, and since it has the characteristics of public interest that many unspecified people see, accurate representation of time is very important.

The clock display method using the real-time clock of the conventional controller has to correct the time manually or automatically periodically due to the accumulated error.

This design programmatically integrates the part that automatically corrects the time through the authorized internet time server periodically in the main controller of the electronic display board to maintain the accurate and accurate clock function without the need for a complicated hardware device including a separate GPS or a PC. It is an electronic sign system.

Therefore, since there is no need for a separate GPS system or an operating PC, cost reduction and management efficiency can be achieved.

The present invention relates to an electronic display system having a time correction function through periodic time synchronization through an authorized time server.

In addition, this function can be solved programmatically in an electronic board controller without a separate hardware or an operating PC, thereby reducing costs and managing efficiency.

The present invention relates to an electronic display system for displaying an accurate clock through periodic time correction through an authorized time server.

As a reference diagram for explaining the present invention, FIG. 1 is a system configuration diagram of the present invention, and FIG. 2 is a system flowchart of the present invention.

In FIG. 1, the central processing unit 1 transmits the contents to be displayed on the display board by the predetermined program to the display screen display unit 2, and reads the current time from the internal real-time clock 4 when a clock expression is required. come. The internal real-time clock (4) is a kind of digital clock using a crystal oscillator and clock processor, and when operated without separate periodic calibration, accurate time display is difficult due to cumulative error.

Therefore, in the present invention, it is possible to express a reliable clock at all times by periodically synchronizing time from an authorized time server 5 through the Internet by the controller itself without any additional hardware or a PC.

Fig. 2 is a system flow chart, which prepares for displaying a message on the display board by initialization (6), and checks whether the clock is displayed by the program (7), and if the routine should display the clock, the current time is retrieved by calling the current time. Expression (8). When not in the clock display mode, a predetermined phrase or image is displayed (9). Next, when periodic time correction is required by the predetermined timer 10, time synchronization 11 is performed with a time server through the Internet, and correct time is corrected.
Fig. 2 is a system flow chart, which prepares for displaying a message on the display board by initialization (6), and checks whether the clock is displayed by the program (7), and if the routine should display the clock, the current time is retrieved by calling the current time. Expression (8). When not in the clock display mode, a predetermined phrase or image is displayed (9). Next, when periodic time correction is required by the predetermined timer 10, time synchronization 11 is performed with a time server through the Internet, and correct time is corrected.
3 is a detailed representation of the time synchronization process with a time server. Compiling and porting the embedded Linux OS 3 to an ARM CPU-based small electronic board controller, and using the rdate command 5 of the embedded Linux, an authorized time server. (6) retrieves the current exact time from time.kriss.re.kr or time.bora.net, synchronizes it with the controller's real-time clock, and displays it on the display. In addition, this process is registered as a schedule in the cron daemon of embedded Linux, and the time is corrected every hour, so that the correct time can be displayed on the signboard 365 days a year without any maintenance.

The present invention aims to build a reliable and accurate time with respect to the clock display function of the electronic display board at an effective and low cost, and it is an electronic display system with a time correction function through periodic time synchronization through an authorized time server. Programmatically solved in the electronic board controller without a separate hardware or operating PC can reduce costs and manageability.

Claims (1)

In displaying the clock on the display board, the clock is periodically synchronized with the internal real time clock (4) of the display board controller (3) and the authorized time server (5) through the Internet. Display system to display watch

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