JPH08146902A - Movable electric sign display device - Google Patents

Abstract

PURPOSE: To provide an electric sign display device which is capable of displaying information even during traveling, allows changing of display contents and improves an advertisement effect. CONSTITUTION: This display device has an LED display 1 which is disposed with LEDs 7 and on which data is displayed, a battery 2 which supplies a power source to this LED display 1, a display control microcomputer 4 which calculates the current value to be supplied to the LED display 1 when the number of the lighting of the LEDs 7 at the time of data display in the stopping state of a vehicle is smallest and a current limiting circuit 3 which limits the supply current to be supplied to the LED display 1 to the min. current value calculated by the display control microcomputer 4 during traveling.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile electronic sign display device mounted on a vehicle.

[0002]

2. Description of the Related Art Conventionally, for example, a large number of L's are provided on the side of an automobile.
There is a mobile electronic sign display device in which a display equipped with a display element such as an ED is attached. This device is the LED
By selectively flashing, desired data such as parking lot availability information, event information, and product advertisement information is displayed.

[0003]

However, in such a mobile electronic signature display device, from the viewpoint of safety, blinking display during traveling, that is, change in luminance when viewed on the entire display portion during traveling is restricted. There is. Therefore, in the conventional mobile electronic signature display device, the information display is stopped while the vehicle is running, and there is a problem that the advertising effect is low.

The present invention has been made in view of the above-mentioned conventional problems, and provides a mobile electronic signature display device capable of displaying information while driving and changing display contents to improve advertising effects. The purpose is to do.

[0005]

According to the present invention, as shown in FIG. 4 (corresponding view of claims showing the structure of the claims),
A mobile electronic sign display device 14 mounted on a vehicle includes a large number of display elements, and a display section 15 for displaying desired information by selectively blinking the display elements.
And a power supply unit 16 for supplying power to the display unit 15, and a running display current supplied to the display unit 15 when the number of lights of the display elements in the vehicle stop state is a predetermined value or less. The current value calculation means 17 for calculating the value and the supply current supplied to the display portion 15 during traveling are calculated by the calculation means 1 described above.
And a supply current limiting means 18 for limiting the current value for running display calculated by 7.

Here, the display pattern in which the number of lightings in the present invention is equal to or less than a predetermined value means the number of lightings that can hold the change in luminance so as not to cause a blinking display, and the display pattern that minimizes the number of lightings. Is most desirable.

[0007]

According to the mobile electronic signature display device of the present invention,
The current value calculation means 17 calculates a running display current value supplied to the display unit 15 when the number of lit display elements when the vehicle is stopped is equal to or less than a predetermined value, preferably the minimum, and the supply current limiting means 18 is provided. While the vehicle is traveling, the current value supplied to the display unit 15 is limited to the calculated traveling display current value.

In this way, the display unit 1 is displayed while the vehicle is running.
Since the supply current value to 5 is limited to the current value in the display pattern in which the number of lighting of the display element is equal to or less than the predetermined value, the brightness of the entire display unit 15 during traveling is preferably set when the number of lighting is equal to or less than the predetermined value. The brightness can be kept constant when the number of lights is the minimum. Therefore, even if the display pattern changes, the brightness hardly changes, and it is possible to avoid the blinking display. Therefore, the information can be displayed and the display content can be changed even while the vehicle is running.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 are views for explaining a mobile electronic signature display device according to an embodiment of the present invention, FIG. 1 is a right side view of an advertisement car to which the device of the embodiment is attached, and FIG. FIG. 3 is a schematic diagram showing the circuit configuration of the display device, and FIG. 3 is a flow chart diagram for explaining the operation of the display device.

In the drawing, reference numeral 14 denotes a lightning sign display device. The display device 14 includes an LED display (display section) 1 mounted on the right side surface of an advertising vehicle 13.
The display 1 is provided with a battery (power supply unit) 2 that supplies power via a current limiting circuit 3. The current limiting circuit 3 is controlled by the display control microcomputer 4 to control the LED
The current value supplied to the display 1 is limited to a predetermined limit value or less.

The LED display 1 includes a large number of LED lighting circuits 5. Each lighting circuit 5 includes a resistor 6 for preventing short circuit, an LED 7 (display element), and a switch element for turning on / off the LED 7. And a certain transistor 8.

The display control microcomputer 4 is connected to a vehicle stop / running detection sensor 9 attached to a parking brake (not shown), and receives a vehicle stop or running signal. Further, the microcomputer 4 has a display memory 10,
The memory card reader 11 is also connected to the display data in the memory 10 and the memory card reader 11.
By controlling each of the transistors 8 based on the display data in the memory card (not shown) read by, the LED 7 is turned on and off to output the data to the LE.
The D display 1 is configured to display.

The display memory 10 stores a fixed pattern of paging data for one screen and scroll data of an indeterminate pattern, and the memory card stores display data not stored in the memory 10. .

Next, the operation of the display control microcomputer 4 will be described with reference to FIG.
It will be described based on. When the main switch of the automobile 13 is turned on, first, the output of the current limiting circuit 3 by the display control microcomputer 4 becomes a value larger than the current consumption Imax in the LED display 1 when all the LEDs 7 are turned on. It is set (step S1).

Next, the number of lights of the LEDs 7 in each display pattern of the display memory 10 and the paging data stored in the memory card (not shown) is checked, and the LED display when the number of lights is the minimum is checked. The current consumption Imin in the device 1 is calculated (step S2). At this time,
The display control microcomputer 4 functions as a minimum current value calculation means.

When the parking / running detection sensor 9 detects that the parking brake is on and the vehicle is stopped, the output of the current limiting circuit 3 is changed to Imax.
(Steps S3 and S4), and when the parking brake is off and the vehicle is traveling, it is set to Imin (step S5). At this time, the current limiting circuit 3 functions as a supply current limiting means.

After that, each display pattern is displayed on the LED display 1 by controlling each transistor 8 as described above, and the paging data is updated (step S6).

More specifically, when the vehicle is stopped, a current Imax is supplied from the current limiting circuit 3 to the LED display 1 and each transistor 8 is controlled by the display control microcomputer 4 to control the display memory 10. , And display data in a memory card (not shown) are displayed on the LED display 1. At this time, all the LEDs are displayed on the LED display 1.
Since the consumption current at the time of lighting is constantly supplied, when the number of LED lighting decreases, for example, when the display pattern having a large number of characters is updated to a display pattern having a small number of characters, each L
The brightness of each of the EDs increases, and the display 1
The brightness as a whole is kept constant at the brightness when all the LEDs 7 are turned on.

When the vehicle is running, the current limiting circuit 3 is used.
As a result, the current consumption Imin when the LED display 1 is displaying a pattern in which the number of LED lights is minimum is constantly supplied, and the display data is displayed on the LED display 1 in the same manner as above. At this time, when the number of LED lights increases, as in the case of updating from a display pattern with a small number of characters to a display pattern with a large number of characters, the brightness of each LED decreases, and the brightness of the display 1 as a whole increases. Is kept constant at the brightness when the pattern in which the number of the LED lights is minimum is displayed.

In this way, the current consumption of the running LED display 1 is kept constant at the current consumption during the pattern display in which the number of LED lights is the minimum, so that the above-mentioned current consumption is maintained regardless of the number of LED lights depending on the display pattern. The brightness of the entire LED display 1 can be kept constant to the brightness at the time of pattern display, which is the minimum number of lights, blinking can be avoided, and data is displayed and updated by the LED display 1 even while traveling. be able to.

In the above embodiment, the supply current value during traveling is held at the current consumption value when the number of LED lights is minimum, but for the purpose of the present invention, it is kept within a range where the change in brightness does not cause blinking display. As long as it is as long as possible, the current consumption value may be held when the number of LEDs to be turned on is slightly high.

[0022]

As described above, in the mobile electro-optical sign display device according to the present invention, the current supplied to the display unit when the number of lit display elements is less than or equal to a predetermined value by the current value calculating means, preferably at the minimum. Is calculated, and the supply current limiting means limits the supply current to the traveling display unit to the calculated current value, so that the brightness of the entire traveling display unit is always less than or equal to the predetermined value. At this time, it is desirable that the brightness can be kept constant at the minimum brightness, blinking can be avoided, information can be displayed and updated even while the vehicle is running, and the advertising effect can be improved.

[Brief description of drawings]

FIG. 1 is a right side view of an automobile to which an electronic signature display device according to an embodiment of the present invention is attached.

FIG. 2 is a schematic configuration diagram of the electronic signature display device of the above embodiment.

FIG. 3 is a flow chart for explaining the operation of the apparatus of the above embodiment.

FIG. 4 is a claim correspondence diagram showing the configuration of the claims of the present invention.

[Explanation of symbols]

 1 LED Display (Display) 2 Battery (Power Supply) 3 Current Limiting Circuit (Supply Current Limiting Means) 4 Display Control Microcomputer (Minimum Current Value Calculating Means) 7 LED (Display Element) 14 Mobile Lightning Sign Display Device

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location G09G 3/32 4237-5H

Claims (1)

[Claims] 1. A mobile electronic sign display device mounted on a vehicle, comprising a plurality of display elements, a display section for displaying desired information by selectively blinking the display elements, and a power supply for the display section. A power supply unit that supplies power, a current value calculation unit that calculates a running display current value that is supplied to the display unit when the number of lights of the display elements when the vehicle is stopped is a display pattern of a predetermined value or less, A mobile electronic sign display device, further comprising: a supply current limiting unit that limits a supply current supplied to the display unit to a running display current value calculated by the calculation unit.