JPS6215598A - display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] I! constructed in a loop shape! (When sending display data to multiple displays using the II data line, it is necessary to set the machine number on the display side, and the controller ('' controller) must specify the machine number and send the display data. be.

The present invention provides a shift register in a display, connects the shift registers of each display in series to form a loop-shaped data line, and transmits a shift signal along with display data from a controller to sequentially transfer and receive the data. be.

[Industrial field of use]

The present invention relates to an improved method for transmitting display data to a display device having a plurality of displays.

2. Description of the Related Art In recent years, price display devices that electronically display the prices of displayed products have become popular.

This price display device displays the price of the product by installing a display on each product shelf in retail stores and transmitting price data from the controller.
It can be easily managed.

” Since the two display devices are distributed and installed for each product, each display device is connected with one set of transmission cotton, and each display device has a machine number (address) that is displayed by the controller. )
is identified and display data is received and displayed.

However, since this machine number is set by a switch or the like installed on each display, the display becomes expensive and the work of setting switches corresponding to each product is troublesome.

The above-mentioned problem is similar to other display devices having a plurality of displays, and there is a need for a simple display device that does not require machine number setting.

[Conventional technology]

A conventional example will be explained with reference to FIG.

FIG. 3 is a block diagram showing an example of an electronic price display device, in which 2a and 2n have the same configuration, and transmission line 1
00, a display device 1 that receives and displays display data that is serially transmitted by J.
~I'm Laura.

The displays 2a and 2n are display sections 3. and 3.2 that are made of liquid crystal or the like and are capable of displaying 4 digits. a sliding section 4 which is equipped with a segment decoder and drives the repetitive display section 3; Interface 5. It is composed of a machine number setting section 6 made up of a plurality of switches, and the interface 5 receives display data that matches the machine number set by the machine number setting section 6 and displays it on the drive section 4. ing.

[Problem that the invention seeks to solve]

Display unit 1 (10&:[l
To identify the machine number setting switch, set it to 7! Ill
It was necessary to set different machine numbers for each product.

The present invention provides a display device that allows each display device to receive display data without the need for setting the machine number.

[Failure to solve the problem]

For the above purpose, the present invention, as shown in the principle explanatory diagram of FIG. Also, a shift means (9a) for shifting the display data sent to the data line to the designated display device, and a writing means (9a) for writing the shifted display data to the register (11) provided in the display device. 9b), and confirmation means (8) for shifting and returning the multi-display data after the above writing and 7j and comparing and confirming it with the sent display data, and receiving and displaying the display data on the display based on the shift amount. It is something that forces you to do something.

[Effect]

In other words, if shift registers provided in display devices are connected in series to form a data line, data can be transferred to the shift register of each display device using a predetermined number of shift signals synchronized with the display data. Sends a write signal to the register that is currently in use and causes it to be received.

Since the present invention specifies the display device by the shift amount, the conventional machine number setting section and setting work can be made unnecessary.

〔Example〕

The details of the present invention will be explained according to the embodiment shown in FIG.

This embodiment shows a display device in which each shift register has a number of bits equal to the amount of display data, and the display data is sent to all displays and written simultaneously.

In the block diagram of the electronic price display device in FIG. It is composed of a segment decoder 4b, a drive section 4a that drives the display section 3 in a predetermined repetition cycle, and the display section 3.

On the other hand, the controller 1-roller 7 has a shift amount table 13 that specifies the shift amount corresponding to the connected display device, and a solid device and 1
A communication control unit 15 that performs mass communication and stores received data in the memory 14. Shift the received data)b±data line 101.b with reference to child table 3. The transmitting section 9 sends out a shift 1 signal, and after receiving it, it sends out a shift 1 signal and returns the sent data. Comparison with the silent transmission data 4'
It consists of 4 recognition surfaces and 8 recognition parts.

The output terminal of the shift register of each display is sequentially connected to the input terminal 7 of the shift register of the adjacent display, and is connected to the controller 7 in a loop to form a data line 101. The shift signal line 1 is connected to the
02 and write signal line 103 are wired from the connector l)-+-rough.

An example of the data transmission operation of the electronic price display device having the above configuration will be explained with reference to the operations Tie J and Char I shown in FIG. 2(l).

Figure 2 fbl i; is the display 10a, IOb, 10c
The figure shows the case where data is transmitted simultaneously from each display unit when the display unit is composed of three units.

The display data received by the communication control unit 15 is stored in the memory 1.
The display data is stored and updated in a predetermined address in the display device Inc, 10b, and lQa in order, and the transmitter 9 reads the display data in the order of the display devices Inc, 10b, and lQa, and sends it out together with a predetermined shift I signal (32×3 sets) 50.

First, the display data of the display device 10c is shifted and stored in the shift register of the display device 10a by the shift signal 32#JI, and sequentially shifted to the display devices 10b and 10c by the subsequent shift 1 signal.

At this time, the display data of the display devices 10a and 10t1 have been shifted into respective predetermined shift registers, and a write signal 51 is sent out to write into the registers connected to each shift 1/sost.

Subsequently, when the return shift signal 52 (32x.'l) is sent, the data in each shift register is sequentially shifted and sent back to the controller 1-row.

The confirmation section 8 checks the return data recorded in - and the transmission data stored in the memory 14, and if they do not match, the transmission section 9
command to retransmit.

Furthermore, the center'! j. By periodically reading and transmitting the data of all the displays from the memory 14 regardless of whether or not the data is received from 1%', it is possible to always display the current price on all the displays.

[Effect of the Invention J As explained above, the present invention provides a reception shift register in each display and connects the shift registers in series to form a data line, and allows the display to receive data depending on the amount of shift. This has the effect of eliminating the need for a machine number setting means that was previously required, and also enabling confirmation of reception.

[Brief explanation of the drawing]

1 is a diagram explaining the principle of the present invention, FIG. 2 is a block diagram of an electronic price display device according to an embodiment of the present invention, FIG. This is a block diagram of a price display device.In the figure, 1 and 7 are controllers, 2a and 2n5 are conventional displays, 3 is a display section, 4.4a is a drive section, 4b is a segment decoder, 5 is an interface, and 6 is a Machine number setting section, 8 is a confirmation section, 9 is a sending section, 9a is a shift means,
91) Write number 1-J 1st row, 1 0, 1 0 a
~1 (Lc is the display of the present invention, 11 is a register,
1 2! 13 is a shift amount table, 14 is a memory, 15 is a communication control unit, 50 is a shift signal, 51 is a write signal, 52 is a return shift month,

Claims (1)

[Scope of Claims] A plurality of display devices connected in series to a set of data lines configured in a loop, and a control device that sends display data to each of the data lines and displays it on the display device. The display device is equipped with a shift register (12) for each display, the shift registers are connected in series to form a data line (101), and the display data sent to the data line is transmitted to a designated display. Shifting means (9a) for shifting the shifted display data to a register (11) of the display device; Writing means (9b) for writing the shifted display data into a register (11) provided in the display; and after the above writing, the display data is shifted, returned and sent. A display device comprising confirmation means (8) for comparing and confirming the displayed data.