JPH0533224U - Electronics - Google Patents

Abstract

(57) [Summary] [Purpose] The power is turned on / off according to the open / closed state of the display without the need for firmware, and the malfunction of turning on / off the power when the display is closed is prevented. To prevent. [Configuration] By connecting the detection switch and the power switch in series, turning on / off of the power is controlled according to the open / close state of the display, and malfunctions of turning on / off the power when the display is closed are prevented. To be prevented.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electronic device having an opening / closing type display unit such as a flat display, and more particularly to an electronic device that controls turning on / off of a power source according to an open / close state of the display unit.

[0002]

[Prior Art]

 In recent years, electronic devices such as laptop computers and Japanese word processors equipped with a flat display called a clamshell type or a lunch box type have become popular. Since such electronic devices use flat displays consisting of plasma displays and liquid crystal displays, they can be made smaller and lighter and are easier to carry and handle.

FIG. 2 shows a laptop computer as an example of such an electronic device, which includes a main body 2 including a keyboard 1 and an arithmetic processing unit (not shown), and a low power consumption type display device such as a liquid crystal display. The display unit 3 is supported by the main body unit 2 via an opening / closing mechanism unit 4 such as a hinge mechanism so as to be freely openable / closable in the vertical direction in the arrow direction.

By the way, power on / off of the electronic device is detected by a power switch provided on the side surface or the back surface of the main body 2 and an opening / closing mechanism 4 which detects opening / closing of the display 3. Firmware is independently monitored for each switch and is performed according to the state of both switches. For example, when the display unit 3 is closed, the function of the power switch is invalidated by the firmware, and even if the power switch is turned on, the electronic device is not powered on. In addition, the function of the power switch is enabled when the display unit 3 is raised and opened, and the electronic device is powered on / off according to the on / off state of the power switch.

[0005]

[Problems to be solved by the device]

 However, as described above, the firmware for monitoring the power switch and the detection switch is required to turn on / off the power to the electronic device, and the circuit for turning on / off the power becomes complicated. was there.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an electronic device that turns on / off the power in accordance with the open / closed state of the display unit without requiring firmware. And

[0007]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides an electronic device including an opening / closing mechanism that supports a display unit with respect to a main body so that the display unit can be opened and closed. A switch, a power switch connected to the detection switch in series and arranged in the main body section, and a power control section for controlling power on / off based on the states of the detection switch and the power switch. It is characterized by having done.

[0008]

[Action]

 Since the present invention is configured as described above, by connecting the detection switch and the power switch in series, the power is turned on / off according to the open / closed state of the display unit, and the power supply when the display unit is closed. It is possible to prevent erroneous operation of turning on and off.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a configuration of an electronic device according to an embodiment of the present invention. The same parts as those in FIG. 2 are designated by the same reference numerals, and detailed description thereof will be omitted.

In FIG. 1, reference numeral 10 denotes, for example, a mechanical detection switch provided in an opening / closing mechanism unit 4 that supports the display unit 3 so as to be opened and closed, and detects the open / closed state of the display unit 3. That is, when the display unit 3 is opened, that is, when the display unit 3 is raised from the keyboard 1, the detection switch 10 is turned on, and the display unit 3 is closed, that is, the display unit 3 is closed to the keyboard 1 side. Then, the detection switch 10 is turned off. The detection switch 10 is connected in series with a power switch 11 arranged on a side surface or a rear portion of the electronic device.

The output of the power switch 11 is output to a power control circuit 12 that controls the turning on / off of the power of the electronic device. The power control circuit 12 corresponds to the states of the detection switch 10 and the power switch 11 and the main body 2 And control the power supply to the display unit 3. For example, when the power switch 11 is turned on while the detection switch 10 is on, that is, the display unit 3 is open, the power control unit 12 turns on the main body unit 2 and the display unit 3. ..

Next, the operation of the embodiment of the present invention having the above structure will be described.

First, when the display unit 3 is closed to the keyboard 1 side, the detection switch 10 is in an off state, and even if the operator operates the power switch 11 in this state, the power switch 11 Since the signal output from the power supply controller 12 does not change, the operation of the power switch 11 is invalid, and the power switch 11 does not turn on or turn off the power. Therefore, it is possible to prevent an erroneous operation of turning on / off the power when the display unit is closed.

On the other hand, when the display unit 3 is raised from the keyboard 1 and opened, the detection switch 10 is turned on, and when the operator operates the power switch 11, the power switch 11 causes the power control unit 12 to move. The output signal becomes valid, and the power supply control unit 12 controls the turning on / off of the power supply according to the operation of the power supply switch 11. That is, if the power switch 11 is turned on while the electronic device is turned off, the power is turned on, and if the power switch 11 is turned off while the power is turned on, the power is turned on. Is cut off.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

[0017]

[Effect of the device]

 As described in detail above, according to the electronic device of the present invention, by connecting the detection switch and the power switch in series, it is possible to control the turning on / off of the power source according to the open / close state of the display section. , It is possible to prevent the malfunction of turning on / off the power when the display is closed.

Further, since the firmware for monitoring the detection switch and the power switch is not required, the burden on the firmware can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an electronic device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a general electronic device having a display unit that can be opened and closed.

[Explanation of symbols]

 2 ... Main body 3 ... Display 4 ... Opening / closing mechanism 10 ... Detection switch 11 ... Power switch 12 ... Power control unit

Claims (1)

[Scope of utility model registration request] 1. An electronic device comprising an opening / closing mechanism section for supporting a display section so as to be openable / closable with respect to a main body section, and a detection switch provided in the opening / closing mechanism section for detecting opening / closing of the display section, An electronic device comprising: a power switch connected in series to the main body; and a power control unit that controls turning on and off of power based on the states of the detection switch and the power switch. ..