JPH05241687A - Electronic equipment - Google Patents

Abstract

PURPOSE:To display a power supply means taking charge of supplying power to the main body to a user in the electronic equipment having a plurality of power supply means. CONSTITUTION:In the electronic equipment having a plurality of power supply means such as an AC adapter 11 and an internal battery 12, voltage detection circuits 13 and 14 are connected to each of them. When the voltage detection circuits 13 and 14 output the state of the AC adapter 11 and the internal battery 12 to a selector 15, the selector 15 selects either of power supply means 11 or 12. When both of the AC adapter 11 and the internal battery 12 are available, the selector 15 is designed to select the AC adapter 11 preferentially and a DC-DC converter 16 supply power to each section of the personal computer 20. Based on the output of the selector 15, a LED driver 17 turns on LED 18 showing the power supply by the selected AC adapter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to electronic equipment such as personal computers and word processors which can be operated by a plurality of power supply means.

[0002]

2. Description of the Related Art Conventionally, in an electronic device such as a personal computer which has one or more internal batteries and can be operated by an AC adapter and an internal battery, when the AC adapter is used, power is supplied from the AC adapter and the internal battery The battery was charged, and power was supplied from the internal battery when there was a power failure or when used in a place without an AC outlet. When the voltage of the battery drops, a buzzer or LED alerts the user of the remaining amount,
The user has made a transition to a resume mode with low power consumption or a backup of input data to a nonvolatile storage medium.

[0003]

However, when the AC adapter is in use and there is no power supply from the AC outlet or the AC adapter is in a failure state, the remaining battery level is sufficient. If so, the user will be able to
I think that the power is supplied by the adapter, I leave the seat for a long time without turning off the power of the personal computer, and in the worst case, the internal battery capacity runs out,
There was a problem that the input data was lost.

Therefore, according to the present invention, a display for displaying which power supply means among the plurality of power supply means is supplying power to the main unit when an electronic device such as a personal computer having a plurality of power supply means operates. An object of the present invention is to provide an electronic device such as a personal computer which can be used by the user with peace of mind by notifying the user of the power supply state by means.

[0005]

In order to achieve the above object, an electronic apparatus of the present invention has a plurality of power supply means, a detection means for detecting the states of these power supply means, and a detection means of the detection means. It is provided with a selector for selecting the power supply means based on the result and a display means for displaying the selection result of the selector.

[0006]

According to the electronic equipment of the present invention, the power supply means selected from the plurality of power supply means of the electronic equipment can be displayed on the display means for displaying the power supply means.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 is a block diagram showing the system configuration of the first embodiment of the present invention. In FIG. 1, the power supply means are 11 AC adapters and 12 internal batteries,
To each of these, 13 and 14 voltage detection circuits are connected.
The voltage detection circuits 13 and 14 output the states of the AC adapter 11 and the internal battery 12 to a selector 15, and this output causes the selector 15 to select the AC adapter 11 and the internal battery 12 which are power supply means. This selector 15 is an AC adapter 11,
When both the internal batteries 12 can supply power, the AC adapter 11 is preferentially selected, and 16 D
Power is supplied to each part of the personal computer 20 by the C-DC converter, and at the same time, the internal battery 12 is charged. In addition, the output of the selector 15 indicates power supply by the AC adapter in which 17 LED drivers are selected.
Turn on the LED. When the power supply from the AC adapter 11 is stopped, the voltage detection circuit 13 detects the voltage drop and outputs a signal to the selector 15. Selector in response to this signal
15 is a power supply means from the AC adapter 11 to the internal battery 12
Change to. At the same time, the output of the selector 15 causes the LED
The driver 17 turns on 19 LEDs indicating the power supply by the internal battery.

In this embodiment, in order to detect the states of the AC adapter 11 and the internal battery 12, the voltage detection circuit 13,
Although the case of using 14 has been described, a current detection circuit for detecting the amount of current may be used instead of this example. Further, the voltage detection circuit 14 connected to the internal battery 12 of the present embodiment may be used to issue the internal battery remaining amount warning.

FIG. 2 is a block diagram showing the system configuration of the second embodiment of the present invention. In FIG. 2, the AC adapter 11 and the internal battery 12 which are power supply means are connected to the selector 15. Here, the terminal voltage of the internal battery 12 is set to be lower than the input voltage from the AC adapter 11, and the selector 15 automatically operates when the input voltage from the AC adapter 11 is higher than the terminal voltage of the internal battery 12. AC
The adapter 11 is selected as the power supply means. In this case, since the internal battery 12 is charged, the charging current is supplied from the AC adapter 11 to the internal battery 12. LED driver
At 17, the LED 21 is turned on by the output from the selector 15. Here, by using the LED 21 capable of lighting two colors, it is possible to display four types of power supply means including the LED off state.

FIG. 3 is a block diagram showing the system configuration of the third embodiment of the present invention. In FIG. 3, reference numeral 31 is an adapter detector for detecting that the AC adapter is connected. When the adapter detector 31 detects that the AC adapter is connected and the voltage detection circuit 13 does not detect the specified voltage, the LED driver 17 detects that the output of the adapter detector 31 and the voltage detection circuit 13 is 32 AC adapter error. Turn on or blink the LED.

A detector similar to the adapter detector 31 of the present embodiment may be provided at the connecting portion of other power supply means such as an internal battery, and the internal battery non-connection warning LED or the like may be turned on or blinked. ..

In the embodiments of FIGS. 1, 2 and 3, the system configuration using the AC adapter 11 and the internal battery 12 as the power supply means has been described, but the present invention is not limited to this example, and the solar cell,
Power supply means such as wireless power may be used. Further, although the embodiments of FIGS. 1, 2 and 3 have been described with respect to the case where the present invention is applied to a personal computer, the present invention is not limited to this example and may be applied to other electronic devices such as a word processor. Further, in the embodiments of FIGS. 1, 2, and 3, the LED lighting is used to display the selected power supply means, but not limited to this example, a buzzer sound, a synthetic voice, a display on the LCD or a display, The user may be informed of the selected power supply means.

[0013]

As described above, according to the electronic equipment of the present invention, the display means for displaying the power supply means includes the power supply means selected from the plurality of power supply means of the electronic equipment. Since the information can be displayed, the user can accurately grasp the power supply status of the electronic device.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment when the present invention is applied to a personal computer.

FIG. 2 is a block diagram showing a second embodiment when the present invention is applied to a personal computer.

FIG. 3 is a block diagram showing a third embodiment when the present invention is applied to a personal computer.

[Explanation of symbols]

11 ... AC adapter, 12 ... Internal battery, 15 ... Selector, 16 ... DC-DC converter, 17 ... LED driver, 20 ... System, 31 ... AC adapter detector

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Takashi Abe Inventor Takashi Ara 7-1-1 Higashi Narashino, Narashino City, Chiba Prefecture Hitachi Systems Co., Ltd. Office System Design and Development Center (72) Inventor Takeshi Shiobara Yoshida Town, Totsuka Ward, Yokohama City, Kanagawa Prefecture 292 In stock company Hitachi Imaging Information Systems (72) Inventor Susumu Onodera Yoshida-cho, Totsuka-ku Yokohama, Kanagawa Prefecture 292 House In Hitachi Imaging Information System (72) Incorporator Takeshi Maeda Yoshida-cho Totsuka-ku, Yokohama-shi Kanagawa No. 292 In Hitachi Imaging Information Systems Co., Ltd. (72) Inventor Shigenobu Ishimoto Yoshida-cho, Totsuka-ku, Yokohama City, Kanagawa Prefecture No. 292 In Hitachi Imaging Information Systems Co., Ltd. (72) Nobuyuki Kobayashi Yoshida-cho, Totsuka-ku, Yokohama City, Kanagawa Prefecture No. 292 Stock Company Hitachi Image Information System

Claims (1)

[Claims] 1. A plurality of power supply means capable of operating a main body device, a selector for selecting a power supply to be supplied to the main body device from these power supply means, and a display means for displaying the selected power supply. An electronic device characterized by being provided.