JPS61221798A - Portable 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 (a) Technical Field The present invention relates to a portable display device, and more particularly to a device for preventing a voltage drop in a power supply when driving a display element thereof.

佽) Conventional technology and its drawbacks In competitions such as tennis, volleyball, and table tennis, it is necessary to make the current score status clearly visible to the players and spectators. The system that changes the content requires a staff member to change the displayed content for each point.
If there is poor communication between the referee and the official, there is a possibility that the official may make a mistake. Therefore, in order to solve this problem, a device can be considered in which a transmitter is placed at the referee's hand and the display content is remotely controlled by the transmitter. In such devices, in order to increase the contrast of the display and make it easier to see, the display body that represents the displayed content is composed of a rotatable magnetic plate with different designs on the front and back sides, and this display body is rotated with an electromagnet. It is desirable to display a combination of display elements that can be controlled. Furthermore, it is desirable that the display device itself be portable so that it can support competitions at multiple locations.

Portable display devices like this are movable and often used outdoors, so they use built-in batteries as power sources, but when changing the display content, current is passed through the electromagnets of each display element at the same time. The instantaneous current value was very large, and when the battery was depleted, the terminal voltage could drop due to its internal resistance. At that time, the voltage applied to the control section would drop, potentially causing the control section to malfunction.

(C) Purpose of the Invention In view of the above-mentioned drawbacks, it is an object of the present invention to provide a portable display device that is free from the risk of malfunction of the control section when changing display contents.

(d) Structure and Effects of the Invention The present invention provides a display element consisting of a display body made of a magnetic material and rotatably fixed on a shaft, and an electromagnet that rotates the display body to change the display aspect; The present invention is characterized in that it includes a display control section that controls driving, a control section that inputs contents to be displayed to the display control section, and a display power supply device that drives the electromagnet.

According to the present invention, with the above configuration, when changing the display content through which the maximum current flows in a display device having such a configuration, the power source that drives the electromagnet of the display element and the power source that drives the control section are separated. Therefore, the operation of the control section does not become abnormal due to a voltage drop at the terminals of the battery due to the drive current of the electromagnet, and there is an advantage that malfunctions are eliminated.

In addition, if a storage battery is used as the display power source that drives the electromagnet, and the control unit is charged using the power supply from the power source (battery) when it is not operating, the user will not have to attach it to the display device. The battery is the only power source required, so there is no inconvenience when using it.

(e) Embodiment FIG. 2 is a front view of a portable remote display device which is an embodiment of the present invention. A display section 2.3 is provided on the front of the display device main body 1.
is installed. The display unit 2 has a serve right indicator 4.
a, 4b and score displays 5a, 5b are installed, and the display 3 has set indicators 6a, 6b and a game number display 7a.
, 7b are installed. The display section 2.3 is configured to be substantially black. On the front left side of the display device main body 1, the name of the competition note or team name during the game is displayed.

The figure shows the display for hard tennis scores, etc.
According to this display, Team A has acquired 1 set (set indicator 6a), and this set has acquired 3 games (
Game number display 7a) and the points for this game are 15
(score display 5a). In addition, Team B has acquired 1 set (set display 6b), and this set has 2
A game is acquired (game number display 7b), and the points of this game are 15 (score display 5b). Also, among the above-mentioned indicators, which team B has the right to serve in this game, are the score indicators 5a and 5b and the game number indicator? a, 7
b is a 7-segment Japanese character-shaped display, and serve right indicators 4a, 4b and set indicators 5a, 5b are indicators that display the serve right and the number of acquired sets by displaying dots or not. The display elements of each display have a configuration as shown in FIG. In the same figure, 40 is a rotating shaft 40
This is a display body composed of a square plate magnet rotatably fixed by a. As shown in FIG. 4(A), the front side has a diagonal white coated area on a black background, and the back side has no coated area and is entirely black as shown in FIG. 4(B). Therefore, the display units 2 and 3 are displayed with white characters on a black background. Reference numeral 41 denotes an electromagnet having an iron core 41a and a coil 41b, and by reversing the polarity of the current flowing through the coil 41b, an S pole and an N pole can be formed at either the left or right end.

That is, when changing the display aspect of the display element, if the display element 40 is magnetized in the same direction as the polarity, the display element 40 will be reversed and the surface (surface) having the white coating will be The display body that was displaying the black side (back side) will now display the black side, and the display body that was displaying the back side will now display the front side.

In this embodiment, the current flowing through the electromagnet 1 is pulsed in order to prevent wasteful consumption of the battery. The time is approximately 0.5 seconds.

FIG. 7 is a front view of the remote control transmitter of the portable remote display device. This transmitter is equipped with a total of six keys A to F as operation keys, and each key has the following functions.

Point A key 11: Press when the A side points.

Point B key 12: Press when the B side points.

Return point key 13: Press to display the previous display contents again.

Reset key 14: Press to display the current display contents again.

Serve key 15: Pressed when the right to serve is transferred.

All clear key 16: Press to clear the displayed contents.

For example, in hardball tennis, when the above embodiment is displaying the contents shown in FIG. When pressed, this game ends, so both the score displays 5a and 5b display "00", and the game number display 7 of the B team that has won the game.
b is added to display "3". When the game ends, such as when the B team scores a point, the key E15 is also operated at the same time to switch the serve right display.

FIG. 1 is a block diagram of a control section of a portable remote display device according to an embodiment of the present invention.

A signal received from the antenna 20 is demodulated into key manual data by a receiving circuit 21 and guided to a 4-bit CPU 22. When the CPU 22 confirms that the signal has been input, it outputs a power-on signal to the power control circuit 23 and passes the data that is subsequently sent to the 8-bit CPU 26. 2
The power supply voltage V-2 is constantly supplied to the 8-bit CPU 26. The power supply voltage v1 is supplied to the I10 boat 27 when it receives the power-on signal. That is, C
The PU 26 and the I10 boat 27 start operating when the receiving circuit 21 receives the signal. battery 29
is a charger 30 that supplies power to the power supply control circuit 23;
is also connected. This charger 30 is a circuit that charges a storage battery 31, but the charging is interrupted by a power-on signal from the CPU 22, and charging is resumed by a power-off signal from the CPU 26, which will be described later. The storage battery 31 supplies power to the segment driver 28. Note that the memories 24 and 25 are each composed of a ROM and a RAM. The CPU 26 starts operating after being supplied with the power supply voltage v1, processes the data received from the CPU 22, and sends a signal to the segment driver 28 to drive the electromagnet of the display element corresponding to the received data. The segment driver 28 controls on/off the electromagnet 5 arranged behind each display element display body. After the data processing, the CPU 26 outputs a power off signal to the power supply control circuit 23 and charger 30. This signal stops the power supply voltage V1 and restarts charging the storage battery.

By configuring as described above, only the receiving circuit 21 and the 4-bit CPU 22 with low power consumption need to be constantly supplied with power.
6 is supplied with power in response to a power-on signal from the CPU 22 and starts operating, but at the same time, the charger 30 stops charging the storage battery 31 and disconnects the storage battery 31 and the battery 29. As a result, even if the CPU 26 instructs the segment driver 28 to change the display content and the segment driver 28 drives the electromagnet, this drive is performed by the power of the storage battery 31, so the battery 29 is not directly affected. do not have. Therefore, there is no drop in the voltage between the terminals of the battery 29 due to the large current.

FIG. 5 is a partial configuration diagram of the RAM in the memory 25. Area M1 stores the current match progress. The memory items are the score of the A side (A: points), the number of games acquired (A: games), the number of sets acquired (A: sets), the score of the B side (B: points), the number of games acquired (B: games). ),
These are the number of acquired sets (B: set) and the side (the side with the service right, S). Area M2 remembers the progress of the previous match. Its storage items are the same as those in area M1. As the match progresses and there is a change in the score, etc., the memory contents of area M1 are transferred to area M2 and stored as the previous match progress, and the match progress after the change is stored in area M1 as the current match progress. It is displayed on display 2.3.

FIG. 6 is a flowchart showing the operation of the portable remote display device.

When the receiving circuit 21 receives the signal and the CPU 22 determines that data has been sent from the transmitter, it turns off the charger 30 and the CPU 26 then processes the data sent from the CPU 22 in step nl (hereinafter referred to as step ni).
is simply called ni.

). n2 to n7 are steps for determining each data. If the received data is a manual signal from the reset key 14, proceed as n 2 -'n 16 and write to area M1 of the memory 25.
Redisplay the contents of. If the displayed content is corrupted due to impact, vibration, etc. on the display device, the displayed content can be restored to normal by transmitting this key manual data. Next, if it is a return point key 13 human power signal, proceed from n3 to n8.

At n8, the contents of area M2 and area M1 of the memory 25 are exchanged, and then the process advances to n16, where the contents of area M1 are displayed. Therefore, the progress of the immediately preceding match will be displayed. Therefore, if the input signal of the return point key 13 is received again when the next data is received, the original display will be returned. If the received data is a point mukey 11 human power signal, proceed to n9. In n9, as the game progresses and the display contents such as scores change, the data in area M1 that shows the progress of the match up to that point is transferred to area M2 as the previous match progress, and the data is transferred to the A2 point area of area M1. A predetermined score is added (n10). When the game ends, the set ends, or the match ends as a result of addition, data to that effect is stored in each area (for example, in the case of hardball tennis, basically when one player scores 4 times, 1 The game ends and the first player to win 6 games wins the set. If a player wins 2 or 3 sets first, that player wins and the match ends).

If the received data is a point B key 12 human power signal, n
In n11, as the match progresses and the display content such as scores changes, the data in area M1 that was the match progress up to that point is transferred to area M2 as the previous match progress, and the data in area M1's B A predetermined score is added to the two points (n12). When the addition results in the end of the game, the end of the set, or the end of the match, the same processing as the above-mentioned nlo is performed.

If the received data is a serve key 15 human signal, n13
Then, the S data in area M1 is switched to the A side or the B side. If the received data is all clear key data for 16 people, the contents of area M1 are transferred to area M2 in n14, then area M1 is reset in n15, and n16
Proceed to.

At n16, the segment driver 28 is driven according to the contents of the area M1 to display the progress of the match on the displays 2 and 3.

This display is performed by driving the electromagnet 41 for 0.5 seconds. After the display, the charger 30 is turned on again at n17 and the operation is stopped. nl.

nl? and the charger 30 correspond to means for charging the storage battery of the present invention.

As described above, when the portable display device according to the embodiment of the present invention is used, the battery 29 and the storage battery 31 that drive the segment driver 28 can be separated from each other while the control unit (CPU 26) of the display device is operating. Therefore, even if the segment driver 2 is activated and a large current flows from the storage battery 31 to the electromagnet 41, the current does not directly affect the battery 29.

Thereby, it is possible to prevent malfunction of the control unit due to a voltage drop of the battery 29 when the display contents are changed. In addition, by configuring the storage battery 31 to be charged by the battery 29 and integrating the power sources into one system as in this embodiment,
Easier to replace batteries and connect to external power source.

Further, although this embodiment has been explained using hard tennis as an example, it can be used for almost any competition by storing the scoring pattern in the memory.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the circuit configuration of a portable remote display device which is an embodiment of the present invention, and FIG. 2 is a front view of the above embodiment.
Figure 3 is a schematic structural diagram of the display element of the above example, and Figure 4 (
A) and (B) are front and back views of the display body of the display element, FIG. 5 is a partial configuration diagram of the memory of the above embodiment, and FIG.
The figure is a flowchart showing the operation of the control unit of the above embodiment,
FIG. 7 is a front view of a transmitter for remotely controlling the above embodiment. 29-battery, 30-charger, 31-storage battery.

Claims (2)

[Claims] (1) A display element consisting of a display body made of a magnetic material and rotatably fixed on an axis, and an electromagnet that rotates the display body to change the display mode; and a display control unit that controls the drive of the electromagnet; In a portable display device that includes a control unit that inputs content to be displayed on the display control unit, and a battery that drives at least the control unit, a display power supply device that is configured independently of the battery and drives the electromagnet. A portable display device comprising: (2) The portable display according to claim 1, wherein the display power supply device comprises a built-in storage battery and means for charging the storage battery with the battery when the control unit is not operating. Device.