JPS61246791A - 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] [Field of Industrial Application] The present invention relates to a display device, and more specifically, a display device that can display the remaining capacity of a battery in an electronic device such as a handy terminal that is powered by a battery. Regarding.

[Summary of disclosure]

This specification and drawings include an LCD display with low power consumption, a COOS type LSI, etc., and use a battery as a power source.
In an electronic device such as a handy terminal in which input is performed using a keyboard, means for generating a pulse signal at predetermined time intervals while a charged battery is discharging; and a counting means for incrementing a count in accordance with the pulse signal; A display section is provided as part of the display and displays the battery capacity in dots.

The present invention discloses a display device that allows an operator to visually monitor the remaining capacity at all times by changing the display dots in accordance with the count value of the counting means.

[Prior art]

In recent years, advances in the display function of liquid crystal display devices (LCDs) have made it possible to display multiple lines even in small electronic devices, and because of their low power consumption, this type of electronic device is powered by batteries. has been widely used.

[Problem that the invention seeks to solve]

However, in such conventional display devices, it is necessary to provide a complicated warning means such as a voltage detection method in order to allow the operator to monitor the remaining capacity of the battery, and such warning means are generally disabled due to discharge. A warning was issued before and after the battery reached the end of its lifespan, and it was not configured to constantly monitor the remaining capacity at that time.

Therefore, an object of the present invention is to focus on the above-mentioned problems, and to solve the problems, to calculate the total discharging time after being fully charged and to make the operator always aware of the remaining capacity of the battery. The purpose of this invention is to provide a possible display device.

[Means for solving problems]

That is, the present invention provides a display device for an electronic device driven by a battery that displays a display in the form of a dot matrix. a counting means for incrementing the count; a display section disposed in a part of the display that can display the number of dots corresponding to the remaining capacity of the battery; and a display section that counts the number of dots corresponding to the remaining capacity of the battery. The invention is characterized by comprising a means for changing the count in accordance with the count in the means.

[For production]

In a display device configured in this way, the operator can always know the remaining capacity of the battery by using the dots displayed on a part of the display as a scale. There is no need to provide other warning means, and it is possible to realize a display device that is easy to use for the operator.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

FIG. 1 shows an example of a handy terminal to which the present invention is applied, where l is a microprocessor NPU,
In this example, the display operation of the remaining battery capacity as described later is performed via this microprocessor l. Also, a microprocessor 1, a memory 2 storing a control program according to the flowchart of FIG. 3, and a display 3. Information is exchanged between the board 4 and the self-running timer 5 via the bus 6. 7 is a rechargeable main battery, and 8 is a power switch, and when the power switch 8 is turned on, the above-mentioned Power supply voltage can be supplied to each part.

Note that the free-running timer 5 of this example generates pulses at constant time intervals as long as the power switch 8 is in the "on" state, and the counting counter 9 connected to the timer 5 receives pulses supplied from the timer 5. The count value is incremented in response to a pulse signal. Further, reference numeral 10 denotes a backup battery, and the backup battery 10 allows the count value in the counting counter 9 to be held even when the power switch 8 is in the "off" state.

11 is a connector used when charging the main battery 7, and two terminals 11A and IIB among the three terminals provided on the connector 11 are for charging the main battery 7;
The two terminals 11G are for resetting by supplying a pulse signal supplied from the charger side to the counting counter 9 when charging is completed by a charger (not shown). 1
Reference numeral 2 designates the reset line, and in the counting counter 9, the counted value is reset by the above-mentioned pulse signal.

The count value is sent to the microprocessor l as information from the counting counter 9 every moment via the bus 6, and the microprocessor l displays the battery 7 on the display 3 based on the information as will be described later. An indication signal regarding remaining capacity can be sent.

FIG. 2 shows an embodiment of the display 3 to which the present invention is applied. In this example, the display dot matrix is composed of dots divided into 120 dots in the horizontal direction and 25 in the vertical direction. Of these dots, the bottom dot 3A on one line is assigned to display the remaining battery capacity, and the dots 3B above it are all used for the conventional display section.

Now, the capacity of the main battery 7 in this example is 800■A-H (
In other words, assuming that the capacity is to discharge a current of 600 A for one hour, when the power switch 8 is in the "on" state, the microprocessor l, memory 2, display 3, etc. Current consumption is 50 layers A/H
(corresponding to the load capacity of the battery).

Battery capacity/load capacity=600■A -H150■A=1
2H (1) From formula (1), in this example, the total after full charge is 1
It can be seen that the discharge ends after 2 hours of operation.

Therefore, by assigning one line of dots 3A consisting of 120 dots to the display, 12 hours 1 120 dots 1o ...... (
2) From equation (2), 1/10 hour, ie, 6 minutes of discharge can be displayed as 1 dot out of 3A.

Therefore, by allowing the self-running timer 5 to increment the counting counter 9 by one every 6 minutes, the counting counter 9, which is reset after being fully charged, can be used for the discharging time when the power switch 8 is in the "on" state. The total is counted in units of 6 minutes, and the microprocessor 1 reads out at any timing, and the display 3 displays the remaining amount (drag) 3G and the consumed amount (drag) 30, for example. Second
It can be shown as shown in the figure.

That is, in this example, when the read count is 3 (the total usage time after charging is over 18 minutes), the remaining dot 3C is 1 line dot) 3A, from the left end, 120-3 =117 ・・・・・・(
3) 117 is displayed as a dot, and the consumed 3D is displayed as 3 dots on the right side. In this case, the display will show a prompt message when the power is turned on.
An example where A is displayed is shown.

Furthermore, if the power switch 8 is turned off during use, the free-running timer 5 is interrupted and the sending of step pulses is stopped, so the counting counter 9 uses the backup battery 10 to count. The numerical value is held, and when the power switch 8 is turned "on", counting is restarted from the state before it was turned "off".

The operation procedure for counting the remaining capacity of the main battery as described above will be summarized with reference to FIG. 3. First, in step 21, the main battery 7 is fully charged to reset the counting counter 9,
In step 22, it is determined whether the power switch 8 is in the "on" state, and if it is in the "on" state, step 22 is performed.
Proceeding to step 3, the counting counter 9 performs counting in accordance with the elapsed time.

Thus, when it is determined in step 24 that the predetermined unit time has elapsed, the process proceeds to step 25, in which the counter 9 is incremented by one, and in step 2B, the display 3 displays the number of dots obtained by subtracting the count. This operation procedure is displayed on the display line (drag) 3A, and when the power switch 8 is turned on,
repeated for. Also, in step 22, the power switch 8
If it is not in the "on" state, the counting counter 9 is held at the current count value in step 27.

〔effect〕

As described above, the present invention includes a timer that outputs a pulse signal at predetermined time intervals during discharging of a fully charged battery, and a counting means that increments a count in response to the pulse signal. , a display part that is disposed in a part of the full dot matrix LCD display and can display the battery capacity in dots, and the number of displayed dots on this display part is changed in accordance with the count of the counting means. I did it like this,
The operator can visually monitor the remaining battery capacity at all times, and a display device suitable for battery-powered handheld terminals and the like can be realized.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an example of the configuration of the display device of the present invention, Fig. 2 is a model diagram showing an example of the display device, and Fig. 3 is a counting operation for displaying remaining battery capacity by the display device of the present invention. It is a flowchart which shows the procedure. l...Microprocessor 01PU), 2...Memory, 3...Display unit, 3A, 38.3G, 3D...Dot, 4...Keyboard, 5...Self-running timer. 6...Bath, 7...Main battery. 8...Power switch, 9...Counter, 10...Backup battery. 11... Connector, 11A, IIB, 11G... Terminal, 12... Reset line. Figure 2

Claims (1)

[Claims] A display device for an electronic device driven by a battery that displays a display in the form of a dot matrix, comprising: a timer that outputs a pulse signal at predetermined time intervals during discharge of the battery; and a pulse signal of the timer. a counting means for incrementing a count in accordance with the number of dots; a display section disposed on a part of the display and capable of displaying the remaining capacity of the battery with a corresponding number of dots; A display device comprising means for changing the corresponding number of dots in accordance with the count by the counting means.