JPS636595A - Display unit - 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 [Industrial Field of Application] The present invention is characterized by the alignment characteristics of ferroelectric liquid crystals in an electric field and, unlike conventional liquid crystals, the molecular alignment once oriented remains unchanged even when removed from the electric field. The present invention relates to a display device that utilizes the memory properties unique to ferroelectric liquid crystals that maintain alignment.

[Prior Art] Currently, conventional display devices, such as timetable display devices, display information on a display board by printing or pasting a printed film or paper.

Under these circumstances, when it became necessary to change the displayed information, it was necessary to request a specialist to replace or rewrite the display board.

[Problems to be Solved by the Invention] Therefore, changing the display is very time consuming for the person in charge of the display, and the cost thereof becomes a burden.

SUMMARY OF THE INVENTION An object of the present invention is to provide a timetable display device that solves the above-mentioned problems and dramatically improves the effort required to change display information.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a storage means for storing data to be displayed, a display means having a ferroelectric liquid crystal, and a display means for displaying the content on the display means. and a driving means for displaying on the dielectric liquid crystal.

[Function] Therefore, the present invention can improve the efficiency of displaying and changing the timetable display by installing a ferroelectric liquid crystal in the display, and can improve the service to customers. It can display images with lower power consumption than conventional liquid crystal displays.

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of the configuration of an embodiment of the present invention.

In the figure, K1 is a group of manual/editing keys that are pressed when inputting timetable data and time. K2 is a display instruction key that is pressed when displaying the timetable data on the timetable ferroelectric liquid crystal display DIS after inputting the timetable data.

K3 is a time input start key that is pressed before starting the time manually when setting the timer TM.

K4 is a time manual end key that is pressed after the time is manually set when setting the timer TM.

The CPU is a central processing unit that performs calculation control of the entire device.

DR is a display register that temporarily stores data displayed on the timetable ferroelectric liquid crystal display DIS.

The ROM is a read-only memory and contains a program according to the flowchart shown in FIG. 3, display font data, etc.

The RAM is a readable/writable random access memory, and stores the timetable data manually entered by the input/edit key group 1 and the display on/off flag.

TM is a timer that stores the current time.

The central processing unit CPU and each of these components are electrically connected via buses 81 to B8, respectively, to enable signal transmission and reception. Furthermore, the display register DR and the timetable ferroelectric liquid crystal display DIS are electrically connected by a bus B9, allowing signal transmission and reception.

FIG. 2 shows the timetable data storage area D on the random access memory RAM of FIG. 1, and 31 indicates the timetable data storage area.

Next, an example of the operation of the apparatus shown in FIG. 1 will be described with reference to the flowchart in FIG.

First, in step A1, the display on/off flag of the RAM is set to off. In step A2, key personnel are put on standby. If there is human power on the key, the process proceeds to step A3, and it is determined whether it is the time input start key. If not, return to step A2 and wait for key personnel.

If it is the time-of-day manual start key, the process advances to step A4 and waits for key manual input. If you have key human resources, proceed to step A5.
Determine whether it is an input/edit key group. If it is not an input/edit key group, the process returns to step A4 and waits for key input again.

If it is an input/edit key group, it is time data, so the process advances to step A6 and the time data is stored in the RAM.

Next, the process advances to step A7 and waits for key personnel.

If the key is manually operated, the process proceeds to step A8, and it is determined whether the key is used to end the time manually, and if not, the process returns to step A5 to continue inputting time data.

In step A8, if it is the time input end key, the process proceeds to step A9, and the time data stored in the RAM is set to the timer TM.

Next, proceed to step AIO and wait for key human power.

If there is human power to press the key, the process proceeds to step All, and it is determined whether the key is a display instruction key. If it is not a display instruction key, step A12
Proceed to and determine if it is a manual/edit key group. If it is not an input/edit key group, the process returns to step A3 and it is determined whether it is a time/manual/start key. If not, the process returns to step A2 and waits for key personnel.

In step A12, if it is an input/edit key group,
Proceeding to step A13, timetable data is input. That is, the timetable data is stored in the timetable data storage area of the RAM.

For example, an example of the timetable data storage area shown in FIG.

Next, the process proceeds to step A14, where it is determined whether the display on/off flag is on or off. If it is off, the timetable display is not yet displayed, so the process returns to step AIO and waits for key power. If it is on, the timetable is already displayed, so step A
The process proceeds to step 18, and the processing for exaggerating the flight closest to the current time is started.

First, in step A18, the current time is RA from the timer TM.
Transfer to M.

Next, in step A19, data in the timetable data storage area of the RAM that is closest to the current time is searched.

Then, in step A20, only the inverted display data portion of the data section closest to the current time is transferred to the display, and in step A21, the time section closest to the current time is inverted and displayed.

After that, the process returns to step AIO and waits for key personnel.

In step All, if the display instruction key is pressed,
The process proceeds to step A15, where the timetable data stored in the RAM is transferred to the ferroelectric liquid crystal via the display register DR, and the process proceeds to step A16, where the timetable is displayed.

Then, the process proceeds to step A17, and the display on/off flag of the RAM is set to on. The next step A18
From then on, the process of exaggerating the display of the flight closest to the current time mentioned earlier begins.

With the control procedure described above, it is possible to display and change the timetable display using ferroelectric liquid crystal, and to exaggerate the display of the closest timetable to the current time after the current time.

Note that although this embodiment did not explain how to display the timetable partially, the present invention is not limited to this, and may also be partially displayed for people with poor eyesight. It is possible.

[Effects of the Invention] As explained above, according to the present invention, once data is input to the timetable display device, it continues to be displayed, resulting in low power consumption and easy modification, erasure, and addition.

In addition, since the flight closest to the current time is displayed in an exaggerated manner, customers can see which flight they can take by looking at the minus sign, which improves service.

Furthermore, according to the present invention, by connecting a printer, the currently displayed timetable can be printed on the spot.

Therefore, there is no need to request a printing factory to print a timetable every time the timetable is changed, reducing costs in all aspects. In addition, as another use of the timetable display device, it is effective to use it for occasional announcements and advertisements, and it is also effective to use it as a liquid crystal television at stations with long train intervals.

[Brief Description of the Drawings] Fig. 1 is a block diagram showing an embodiment of the present invention, and Fig. 2 is a block diagram showing an embodiment of the present invention.
FIGS. 3(a) and 3(b) are flowcharts showing an example of the operation of the apparatus shown in FIG. 1. FIGS. K 1---One person/fii collection key group K 3---One time manual start key K 2---One display instruction key K 4---One time input end key CP [1--- One central processing Device ROM---Read-only memory RA M-1---Random access memory DR----
Display register DIS --- Timetable ferroelectric liquid crystal display TM ---
-One timer

Claims (2)

[Claims] (1) It has a storage means storing data to be displayed, a display means having a ferroelectric liquid crystal, and a driving means for displaying the data in the storage means on the ferroelectric liquid crystal of the display means. , a display device that continues to display the data. (2) The display device is a timetable display device for a transportation facility, and has means for displaying in an exaggerated manner the closest scheduled flight to the current time after the current time. Display device.