TWI715336B - Laptop computer capable of detecting lid status and related method - Google Patents

Abstract

A laptop computer includes a first housing, a second housing, a hinge for pivotally connecting the first housing to the second housing, a heat dissipation device disposed on the first housing, a recording device disposed on the second housing for measuring an audio signal when the heat dissipation device is operating, and a processing device. The processing device is configured to calculate one or multiple noise frequencies associated with the operation of the heat dissipation device according to the operational status of the heat dissipation device, acquire an audio energy status associated with the one or multiple noise frequencies of the audio signal, and determine the angle of the hinge according to the audio energy status.

Description

Notebook computer capable of judging open and closed status and related methods

The present invention relates to a notebook computer and related method capable of judging the open and closed state, and in particular to a notebook computer and related method capable of judging the open and closed state based on the noise of the heat sink.

The structure of the notebook computer is divided into two parts, an upper casing and a lower casing. The upper casing is used for setting a screen and a video lens, and the lower casing is used for setting a keyboard, a touch panel, and various internal components required for operation. The upper shell and the lower shell are pivotally connected to each other through a hinge. In order to allow users to easily open and close the notebook, the hinge is usually designed to have the least resistance when it is just opened or closed (the angle of the hinge is about 0~5 degrees) , And the torque increases greatly after the angle of the rotating shaft exceeds about 10 degrees, so that the upper housing and the lower housing can be maintained at an angle suitable for operation.

Users often hope that after closing the laptop, the laptop can automatically enter the sleep mode. Most of the prior art notebook computers use an additional sensor to confirm the angle of the rotating shaft to determine whether the upper casing and the lower casing are closed, and then control the notebook computer to enter a sleep mode. However, the addition of sensors will increase the hardware cost of the notebook computer.

The present invention provides a notebook computer, which comprises a first casing and a second casing for pivotally connecting a shaft of the first casing and the second casing, and is arranged on one of the first casings The heat dissipating device is arranged in a radio device of the second housing for measuring a sound wave signal when the heat dissipating device is in operation, and a processing device. The processing device is used to calculate the corresponding one or more noise frequencies according to the operation amount of the heat sink, obtain a sound energy state in the sound wave signal related to the one or more noise frequencies, and according to the sound energy State to determine a rotation axis angle between the first housing and the second housing.

The present invention also provides a method for judging the open and closed state of a notebook computer. The notebook computer includes a first casing, a second casing, a heat sink, a radio device, and a first casing for pivoting Body and a shaft of the second housing. The method includes the radio device measuring a sound wave signal when the heat dissipation device is operating, wherein the heat dissipation device is disposed on the first housing, and the radio device is disposed on the second housing, and the calculation is based on the operation amount of the heat dissipation device Find out the corresponding one or more noise frequencies, obtain a sound energy state in the sound wave signal related to the one or more noise frequencies, and determine the first shell and the second shell according to the sound energy state A rotation axis angle between the bodies.

FIG. 1 is a schematic diagram of the appearance of a notebook computer 100 in an embodiment of the present invention. As shown in FIG. 1, the notebook computer 100 includes an upper casing 110, a lower casing 120, a hinge 130, a screen 10, a keyboard 20, and a touchpad 30. The screen 10 can be arranged on the upper casing 110 of the notebook computer 100, the keyboard 20 and the touch pad 30 can be arranged on the lower casing 120 of the notebook computer 100, and the components required for the operation of the notebook computer can be arranged on the upper casing 110 or the inside of the lower housing 120, so it is not shown in FIG. 1. The upper housing 110 and the lower housing 120 can be pivotally connected to each other through the rotating shaft 130, and the user can open or close the notebook computer 100 according to his needs, where θ represents the angle of the rotating shaft between the upper housing 110 and the lower housing 120.

FIG. 2 is a functional block diagram of the internal components of the notebook computer 100 in an embodiment of the present invention. To simplify the description, FIG. 2 only shows components related to the present invention. The notebook computer 100 further includes a radio device 40, a heat dissipation device 50, and a processing device 60. The heat dissipating device 50 and the processing device 60 may be disposed inside the lower case 120 of the notebook computer 100. The sound receiving device 40 can be arranged inside the upper casing 110 of the notebook computer 100, so the outer appearance of the upper casing 110 shown in FIG. 1 only shows the sound receiving hole 5 of the sound receiving device 40. In the embodiment shown in Fig. 1, the sound hole 5 is located directly above the screen 10, but the position of the sound hole 5 on the upper housing 110 does not limit the scope of the present invention.

FIG. 3 is a flowchart of the notebook computer 100 judging the open and closed state in the embodiment of the present invention. The flowchart shown in Figure 3 includes the following steps:

Step 310: The processing device 40 confirms the operating capacity of the heat dissipating device 50, and calculates the corresponding noise frequency accordingly.

Step 320: The radio device 40 measures the acoustic signal when the heat sink 50 is operating.

Step 330: The processing device 40 obtains the sound energy state related to the noise frequency in the sound wave signal.

Step 340: The processing device 40 determines the rotation axis angle of the notebook computer 100 according to the sound energy state.

Step 350: The processing device 40 determines the operating mode of the notebook computer 100 according to the rotation axis angle of the notebook computer 100.

In the embodiment of the present invention, the heat dissipation device 50 may be a fan. The basic input and output system (BIOS) of the notebook computer 100 will have a built-in temperature monitoring and cooling device 50 speed setting, which can be dynamically adjusted according to the temperature changes of the internal motherboard, graphics card and/or central processing unit (CPU) The rotation speed of the fan in turn enables the notebook computer 100 to operate normally without overheating.

In step 310, the processing device 40 may confirm the fan speed setting in the BIOS, and calculate one or more noise frequencies of the operation of the relevant heat dissipation device 50 according to the current fan speed setting. In more detail, the processing device 40 can multiply the current fan speed by the number of fan blades and then divide by 60 to obtain the fundamental frequency f1 of the acoustic signal emitted by the heat sink 50 during operation, and then obtain the corresponding n multiplication frequency fn, where fn=n*f1 and n is an integer greater than 1.

In the embodiment of the present invention, the sound receiving device 40 may be a built-in microphone. When the heat sink 50 is operating, the rotation of the fan will cause the air to squeeze, and the change in air pressure will be converted into a sound wave signal including a series of vibrations, which can be transmitted through the air by the radio device 40 in step 320 Measure it.

In step 330, the processing device 40 can obtain the sound energy state related to one or more noise frequencies in the sound wave signal. In one embodiment, the processing device 40 may use Fast Fourier Transform (FFT) technology to convert the acoustic signal presented in the time domain into a frequency domain. Identify each noise frequency component of the operation of the relevant heat dissipation device 50 in the acoustic signal. The energy value of each noise frequency is related to fan size, fan blade design, number of fan blades, fan speed, and radio distance. It should be noted that the way the processing device 40 obtains the sound energy state does not limit the scope of the present invention.

In step 340, the processing device 40 can determine the rotation axis angle θ of the notebook computer 100 according to the sound energy state. Figure 4 is a schematic diagram of the sound energy state obtained by the notebook computer 100 under normal operating conditions (rotation axis angle θ is approximately 45-60 degrees), and Figure 5 is when the notebook computer 100 is closed (rotation axis angle θ is 0 (Degree) The obtained sound energy state diagram, where the horizontal axis represents the noise frequency value, and the vertical axis represents the energy value of the noise frequency. For illustrative purposes, Figures 4 and 5 show an embodiment when n=4. As mentioned above, for the sound wave signal measured from the same heat sink 50 operating at a specific speed, the shorter the distance between the sound receiving device 40 and the heat sink 50, the greater the energy value of most noise frequencies in the sound energy state ; The greater the sound receiving distance between the sound receiving device 40 and the heat sink 50, the smaller the energy value of most noise frequencies in the sound energy state.

In step 350, the sound receiving distance between the sound receiving device 40 and the heat sink 50 is determined by the rotation axis angle θ, and the rotation axis angle θ depends on the degree to which the user opens and closes the notebook computer 100. When the energy value of one or more noise frequencies in the sound energy state is greater than the predetermined value, it means that the radio device 40 and the heat dissipation device 50 are quite close to each other, and the processing device 40 can determine that the laptop 100 has been closed at this time, and then let The notebook computer 100 enters a power saving mode to reduce energy consumption, for example, enters a standby mode, a hibernation mode, a sleep mode, or a shutdown mode.

In an embodiment of the present invention, the processing device 40 can determine the magnitude of the rotation axis angle θ according to the energy value of the fundamental frequency f1 of the acoustic signal. In another embodiment of the present invention, the processing device 40 can determine the magnitude of the rotation axis angle θ according to the energy value of the fundamental frequency f1 of the acoustic signal and the energy value of at least one doubling frequency.

In an embodiment of the present invention, the processing device 40 can be integrated into the CPU of the notebook computer 100. In another embodiment of the present invention, the processing device 40 can be implemented as an independent component. However, the implementation of the processing device 40 does not limit the scope of the present invention.

In summary, the notebook computer 100 of the present invention uses the radio device 40 located in the upper housing 110 and the heat dissipation device 50 located in the lower housing 120 to detect the angle of the rotating shaft 130, so no additional sensor is needed. It is determined whether the upper casing 110 and the lower casing 120 are closed, so as to automatically enter the power saving mode when the notebook computer 100 is closed. The foregoing descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made in accordance with the scope of the patent application of the present invention shall fall within the scope of the present invention.

5: Radio hole 10: screen 20: keyboard 30: Touchpad 40: Radio device 50: heat sink 60: processing device 100: laptop 110: Upper shell 120: lower shell 130: shaft 310~350: Step θ: Rotating shaft angle

FIG. 1 is a schematic diagram of the appearance of a notebook computer in an embodiment of the present invention. Figure 2 is a functional block diagram of the internal components of the notebook computer in the embodiment of the present invention. Figure 3 is a flow chart of the notebook computer judging the open and closed state in the embodiment of the present invention. FIG. 4 is a schematic diagram of the sound energy state obtained by the notebook computer in the normal operation state in the embodiment of the present invention. Figure 5 is a schematic diagram of the sound energy state obtained when the notebook computer is closed in the embodiment of the present invention.

310~350: Step

Claims (10)

A notebook computer including: A first housing; A second housing; A rotating shaft for pivotally connecting the first housing and the second housing; A heat sink arranged in the first housing; A radio device arranged on the second housing for measuring a sound wave signal when the heat sink is in operation; and A processing device for: Calculate the corresponding one or more noise frequencies based on the operating capacity of the heat sink; Find out the sound energy state of the sound wave signal related to the one or more noise frequencies; and According to the sound energy state, a rotation axis angle between the first housing and the second housing is determined. The notebook computer according to claim 1, wherein the processing device is further used to determine an operation mode of the notebook computer according to the angle of the rotation axis. The notebook computer according to claim 2, wherein the processing device is additionally used for: When an energy value related to a noise frequency in the one or more noise frequencies in the sound energy state is greater than a predetermined value, it is determined that the first housing and the second housing are closed at the angle of the rotation axis, And then let the notebook computer enter a power saving mode. The notebook computer according to claim 3, wherein the power saving mode is a standby mode, a hibernation mode, a sleep mode, or a shutdown mode. The notebook computer according to claim 1, wherein the heat dissipation device is a fan, and the processing device is further used for: A fundamental frequency and/or a multiplier frequency of the acoustic signal are calculated according to the rotation speed of the heat sink to provide the one or more noise frequencies. A method for judging the open and close state of a notebook computer. The notebook computer includes a first housing, a second housing, a heat sink, a radio device, and a method for pivotally connecting the first housing and the second housing. One of the two shells, the method includes: The radio device measures a sound wave signal when the heat dissipation device is in operation, wherein the heat dissipation device is disposed on the first housing, and the radio device is disposed on the second housing; Calculate the corresponding one or more noise frequencies based on the operating capacity of the heat sink; Find out the sound energy state of the sound wave signal related to the one or more noise frequencies; and According to the sound energy state, a rotation axis angle between the first housing and the second housing is determined. The method according to claim 6, which further includes determining an operation mode of the notebook computer according to the angle of the rotation axis. The method described in claim 7, which further includes: When an energy value related to a noise frequency in the one or more noise frequencies in the sound energy state is greater than a predetermined value, it is determined that the first housing and the second housing are closed at the angle of the rotation axis, And then let the notebook computer enter a power saving mode. The method according to claim 8, wherein the power saving mode is a standby mode, a sleep mode, a sleep mode, or a shutdown mode. The method according to claim 9, wherein the heat dissipating device is a fan, and the method further includes: A fundamental frequency and/or a multiplier frequency of the acoustic signal are calculated according to the rotation speed of the heat sink to provide the one or more noise frequencies.

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