TWI529609B - Portable electronic device and rotation detection method thereof - Google Patents

Description

Portable electronic device and rotation detecting method thereof

The present invention relates to a portable electronic device, and more particularly to a portable electronic device and a rotation detecting method thereof, which can detect a rotation direction when a tilt angle of ±90 degrees.

In addition to the advantages that the portable electronic device has the advantage of being portable with it, another advantage is that the direction in which the display is displayed can also be changed according to the needs of use.

For example, as shown in FIG. 1A, it shows a display situation of a display of a portable electronic device when the rotation angle is zero degrees; wherein the display uses the X ' axis as the vertical axis and the Y ' axis as the horizontal axis. Show to show. When the portable electronic device is rotated 90 degrees clockwise to form as shown in FIG. 1B, in order to facilitate the user to view the display screen, the display is changed to the Y ' axis as the vertical axis and the X ' axis as the level. Display in the axial direction. In this way, the user can select an appropriate display direction to operate when using different applications, thereby increasing the user experience.

However, limited by the detection limit of the acceleration sensor, the conventional portable electronic device does not correctly detect the rotation angle in all cases, for example, when the display surface of the portable electronic device is parallel to the spatial level ( Horizontal plane), when the portable electronic device is placed on the table or when the user is used in a lying posture, due to the three sensing axes of the acceleration sensor 9 (for example, X ' , Y ' , Z ' ) The three dimensional axes (eg, X, Y, Z) are the same as those of the conventional portable electronic device, as shown in FIGS. 2A and 2B, so when the Z-axis sensing direction of the acceleration sensor 9 is perpendicular to the spatial level At this time, the rotation angle cannot be effectively detected, and the display content of the display cannot be changed according to the rotation of the user.

In view of this, the present invention provides a portable electronic device and a rotation detecting method thereof, which utilizes an acceleration sensor that changes an acceleration sensor in the Z-axis direction. To solve the problem that the conventional portable electronic device cannot perform the rotation detection of the vertical tilt angle.

The present invention provides a portable electronic device and a rotation detecting method thereof, which can display image content according to a rotation direction within a range of tilt angles that a user can actually operate.

The present invention provides a portable electronic device including a display, an acceleration sensor, a processing unit, a first circuit substrate, and a second circuit substrate. The display has a display surface for displaying images. The acceleration sensor is used to detect three-dimensional acceleration. The processing unit is configured to calculate an inclination angle of the portable electronic device in a three-dimensional space according to the three-dimensional acceleration. The first circuit substrate has a first surface parallel to the display surface, wherein the display is electrically connected to the first circuit substrate. The second circuit substrate is electrically connected to the first circuit substrate and has a second surface, wherein the second surface and the first surface have an offset angle of less than 90 degrees, and the acceleration sensor is disposed on the second surface The second surface.

The invention further provides a portable electronic device comprising a display, an acceleration sensor and a processing unit. The display has a display surface for displaying images. The acceleration sensor has a plurality of detection arrays for detecting three-dimensional acceleration, wherein at least one of the plurality of detection arrays has an offset angle of less than 90 degrees from the display surface. The processing unit is configured to calculate an inclination angle of the portable electronic device in a three-dimensional space according to the three-dimensional acceleration.

The present invention further provides a method for detecting a rotation of a portable electronic device. The portable electronic device includes a display, a circuit substrate and an acceleration sensor electrically coupled to the circuit substrate, and the acceleration sensor is used for The three-dimensional acceleration is detected and has an offset angle between the detection array and one of the display surfaces of the display having an offset of less than 90 degrees. The rotation detecting method includes the following steps: calculating a tilt angle of the portable electronic device in three-dimensional space according to the three-dimensional acceleration; correcting the tilt angle by the offset angle to generate a corrected tilt angle or an angle of the offset Correcting a preset range to generate a correction range; comparing the tilt angle to the correction range or comparing the corrected tilt angle to the preset range; and when the tilt angle is within the correction range or the corrected tilt angle is at the preset In the range, a rotation direction is calculated based on the three-dimensional acceleration.

In the portable electronic device and the rotation detecting method thereof, the acceleration sensor is configured to detect an acceleration in a direction offset from the display surface by an offset angle, so that the conventional technology can be solved. The problem of the direction of rotation when the ±90 degree tilt angle cannot be detected. In addition, the conventional software program can be applied to the portable electronic device of the present invention by adding a correction angle (ie, correcting the offset angle), so that the present invention has excellent applicability.

The above and other objects, features, and advantages of the present invention will become more apparent from the accompanying drawings. In the description of the present invention, the same components are denoted by the same reference numerals and will be described first.

1, 1 ' , 1 " ‧‧‧ portable electronic devices

10‧‧‧shell

11‧‧‧ Display

11d‧‧‧ display surface

12, 12 ' ‧‧‧ Acceleration Sensor

121‧‧‧First detection array

122‧‧‧Second detection array

123‧‧‧The third detection array

13‧‧‧Processing unit

14‧‧‧First circuit board

15‧‧‧Second circuit substrate

16‧‧‧Memory unit

17‧‧‧Power Control IC

18‧‧‧Fixed parts

9‧‧‧Acceleration sensor

Θ‧‧‧ offset angle

Θt‧‧‧ tilt angle

Θts‧‧‧corrected tilt angle

XYZ‧‧‧Axis of display

X ' Y ' Z ' ‧‧‧ Acceleration of the axial direction of the sensor

a _X , a _Y , a _Z ‧ ‧ acceleration

Sc‧‧‧ direction control signal

S ₂₁ ~S ₂₇ ‧‧‧Steps

Figures 1A and 1B show schematic views of display images of portable electronic devices at different rotation angles.

2A and 2B show that the dimension of the conventional portable electronic device is the same as the sensing axis of the acceleration sensor.

FIG. 3A is a cross-sectional view showing the portable electronic device according to the first embodiment of the present invention.

FIG. 3B is a schematic diagram showing an acceleration sensor of the portable electronic device according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing a portable electronic device according to an embodiment of the present invention.

FIG. 5A is a cross-sectional view showing a portable electronic device according to a second embodiment of the present invention.

FIG. 5B is a schematic diagram showing an acceleration sensor of the portable electronic device according to the second embodiment of the present invention.

FIG. 6A is a schematic diagram showing a preset range of tilt angles in the portable electronic device according to the embodiment of the present invention.

FIG. 6B is a schematic diagram showing a correction range of a tilt angle in the portable electronic device according to the embodiment of the present invention.

7A and 7B are flowcharts showing a method for detecting rotation of a portable electronic device according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a portable electronic device according to another embodiment of the present invention. schematic diagram.

Referring to FIG. 3A, a cross-sectional view of the portable electronic device according to the first embodiment of the present invention is shown. The portable electronic device 1 of the present embodiment can be, for example, a mobile phone, a tablet computer, a number of person assistants, a line of vehicle recorders, or a satellite navigation device, but is not limited thereto. The portable electronic device 1 includes a housing 10, a display 11, an acceleration sensor 12, a processing unit 13, a first circuit substrate 14, a second circuit substrate 15, a memory unit 16, and a power supply. The control unit 17 and the fixing member 18 are used for protecting the internal components and being held by the user. The material and appearance thereof are not particularly limited.

The first circuit substrate 14 and the second circuit substrate 15 can be, for example, a hard printed circuit board having circuit traces coupled to each other for transmitting and receiving electrical signals; for example, the acceleration sensor 12, the processing unit 13, The memory unit 16 and the power control IC 17 are electrically coupled through the trace. The second circuit substrate 15 is fixed to a surface of the first circuit substrate 14 through a first end, and a second end is away from the first circuit substrate 14 to form an offset angle θ with the first circuit substrate 14 . For example, FIG. 3A shows that the second circuit substrate 15 is disposed on a lower surface of the first circuit substrate 14. In other embodiments, the second circuit substrate 15 may also be fixed to an upper surface of the first circuit substrate 14 . In order to maintain the offset angle θ between the second circuit substrate 15 and the first circuit substrate 14, a fixing member 18 is additionally used for connecting to the second end of the second circuit substrate 15 and the first circuit. The fixing member 18 is, for example, a flexible printed circuit board (FPCB) for electrically connecting the first circuit substrate 14 and the second circuit substrate 15, but is not limited thereto. As long as the offset angle θ can be maintained between the second circuit substrate 15 and the first circuit substrate 14 , the second circuit substrate 15 can be fixed to the first circuit substrate 14 by using other fixing members or fixing methods. The first circuit board 14 and the second circuit board 15 are electrically connected to each other through the first end, and are not particularly limited. In an embodiment, the offset angle θ can be, for example, between 15 degrees and 35 degrees, so that the display surface 11d of the portable electronic device 1 can still be correctly detected when the display surface 11d is substantially parallel to the horizontal plane. The angle of rotation θ can be determined, for example, according to the range of tilt angles that the acceleration sensor 12 itself can detect, and is not limited to those disclosed in the description of the present invention. The upper surface and the lower surface of the first circuit substrate 14 are substantially parallel to the display surface 11d.

The display 11 is, for example, a liquid crystal display panel (LCD display panel), an OLED display panel, an LED display panel, or other display panel for displaying a image. The display 11 has a function of changing the display direction of the image. The display 11 is electrically connected to the first circuit substrate 14 and has the display surface 11d. The user views the image displayed on the display 11 in front of the display surface 11d. According to the direction in which the user holds the portable electronic device 1, the display 11 can change the display direction of one of the images. For convenience of description, one of the portable electronic devices 1 is defined herein to have a longitudinal direction of X ' direction, a width direction of Y ' direction, and a normal direction of the display surface 11d of the Z ' direction. It should be noted that the length direction may be greater than, less than or equal to the width direction, and there is no particular limitation.

The acceleration sensor 12 can be disposed on an upper surface or a lower surface of the second circuit substrate 15 for detecting a three-dimensional acceleration; wherein the upper surface and the lower surface of the second circuit substrate 15 are substantially parallel to each other. As described above, the offset angle θ between the second circuit substrate 15 and the first circuit substrate 14 , the upper surface of the second circuit substrate 15 and the upper surface of the first circuit substrate 14 and the display surface The offset angle θ is also present between the 11d. In one embodiment, the acceleration sensor 12 can be, for example, a Bosch BMA250E gravity sensor (G sensor), but is not limited thereto.

For example, referring to FIG. 3B, a schematic diagram of an acceleration sensor of the portable electronic device according to the first embodiment of the present invention is shown. Referring to FIG. 3A and FIG. 3B, the acceleration sensor 12 of the embodiment includes a first sensing array 121, a second sensing array 122, and a third sensing array 123 for sensing and outputting three, respectively. The internal values of the first sensing array 121, the second sensing array 122, and the third sensing array 123 are well known, and thus are not described herein. In this embodiment, for the purpose of description, the first sensing array 121 is configured to sense the acceleration in the X direction, the second sensing array 122 senses the acceleration in the Y direction, and the third sensing array 123 senses the Z direction. The acceleration; wherein the X direction, the Y direction, and the Z direction are perpendicular to each other. Therefore, when the acceleration sensor 12 is disposed on the second circuit substrate 15 and the portable electronic device 1 is placed on a plane such that the display surface 11d is substantially parallel to the horizontal plane, the first sensing array 121 The offset angle θ is offset from the third sensing array 123, that is, the X direction and the Z direction are offset from the X ′ direction and the Z ′ direction by the offset angle θ, and the Y direction is parallel to the Y ′ direction (eg, Figure 3A shows).

The processing unit 13 can be, for example, a central processing unit (CPU), and can be disposed on the upper surface or the lower surface of the first circuit substrate 14 for calculating the three-dimensional acceleration detected by the acceleration sensor 12 The tilt angle of the portable electronic device 1 in three-dimensional space. For example, it is assumed that the first sensing array 121 detects one of the first accelerations a _{X in} the X direction, the second sensing array 122 detects the second acceleration a _{Y in} the Y direction, and the third sensing array 123 detects The third acceleration a _{Z in} the Z direction is measured, and the processing unit 13 can calculate the tilt angle θt using, for example, the equation (1). In the description of the present invention, the tilt angle θt is defined as the Z ′ direction of the display surface 11d. The angle between the horizontal planes of the space.

The memory unit 16 and the power control IC 17 can be disposed on the upper surface or the lower surface of the first circuit substrate 14, depending on the trace on the first circuit substrate 14. The power control IC 17 is used to control the power supplied to the display 11, the acceleration sensor 12, the processing unit 13, and the memory unit 16. The memory unit 16 is configured to store the operable tilt angle information, the operable acceleration range information, the operable rotation angle information, and other information required for the rotation operation. The display 11, the acceleration sensor 12, the processing unit 13, the memory unit 16, and the power control IC 17 are electrically coupled to each other through signal lines or bus bars (ie, traces), as shown in FIG. It is to be understood that the connection of the various elements in FIG. 4 is merely illustrative and is not intended to limit the invention.

Compared with the conventional portable electronic device in FIG. 2A and FIG. 2B , in the embodiment, when the portable electronic device 1 is placed on the desktop or the user is used in a lying posture, that is, when When the normal direction Z ′ of the display surface 11 d of the display 11 is parallel to the space lead straight line, the third sensing array 123 of the acceleration sensor 12 senses the offset of the Z direction of the acceleration a _Z from the Z ′ direction. The angle θ is still able to effectively detect the rotation angle, so that the display image of the display 11 can still change the display direction according to the detected rotation angle.

Referring to FIG. 5A, there is shown a cross-sectional view of a portable electronic device 1 ' according to a second embodiment of the present invention. The difference between this embodiment and the first embodiment is that, in the second embodiment, an acceleration sensor 12 ′ is the same as the processing unit 13 , the memory unit 16 and the power control IC 17 disposed on the first circuit substrate 14 or Different surfaces. In order to achieve the same efficacy as the first embodiment, the configuration of the sensing array in the acceleration sensor 12 ' is different from that of the acceleration sensor 12.

Please refer to FIG. 5B, which shows a schematic diagram of an acceleration sensor of the portable electronic device according to the second embodiment of the present invention. The acceleration sensor 12 ′ also includes the first detection array 121 , the second detection array 122 , and the third detection array 123 . In this embodiment, the third detection array 123 is not perpendicular to the first detection array 121 and the second detection array 122, and the third detection array 123 and the first detection array 121 and the The second detection array 122 has an offset angle θ (θ ≠ 90 degrees) between the set planes. Therefore, the portable electronic device 1 ′ may not separately form a second circuit substrate 15 , and the acceleration sensor 12 ′ is directly disposed on the upper surface or the lower surface of the first circuit substrate 14 . Therefore, when the acceleration sensor 12 ′ is disposed on the first circuit substrate 14 , the first detection array 121 and the second detection array 122 are parallel to the display surface 11 d and the third detection array 123 The offset angle θ is provided between the display surface 11d.

In the first and second embodiments, the processing unit 13 directly includes the first acceleration a _X , the second acceleration a _{Y ,} and the third acceleration a _Z according to the three-dimensional acceleration of the acceleration sensor 12 . (1) A tilt angle θt is calculated, so that the obtained tilt angle θt simultaneously includes the effect of the offset angle θ. Therefore, the processing unit 13 can correct the tilt angle θt according to the offset angle θ to obtain a corrected tilt angle (θt±θ), which represents the actual tilt angle of the display surface 11d.

In addition, the acceleration sensor 12 (12 ' ) is not capable of correctly calculating the three-dimensional acceleration in all states, for example, when the Z direction is perpendicular to the spatial level. Therefore, in the first and second embodiments, the processing unit 13 can further determine whether the obtained inclination angle θt or the corrected inclination angle (θt±θ) is within the operable angle range to avoid malfunction. For example, when the processing unit 13 determines the corrected tilt angle (θt±θ), since the corrected tilt angle (θt±θ) does not include the effect of the offset angle θ, the processing unit 13 determines the corrected tilt angle. (θt±θ) is within a predetermined range; wherein the preset range may be a range of tilt angles detectable by the acceleration sensor 12 itself and may be pre-stored in the memory unit 16. In addition, when the processing unit 13 determines the tilt angle θt, since the tilt angle θt includes the effect of the offset angle θ, the processing unit 13 determines whether the tilt angle θt is within a correction range; wherein the correction range It is obtained by correcting the preset range with the offset angle θ. In the present invention, the correction range and the preset range are respectively used to define one of the tilt angle θt and the correctable tilt angle (θt±θ); wherein the preset range does not cover the ±90 degree tilt angle This correction range covers ±90 degree tilt angle.

Referring to FIG. 6A, the preset range is, for example, between the tilt angles θ _TH - - θ _TH of the display surface 11d, and θ _TH and - θ _TH are substantially symmetrical with respect to the spatial horizontal line H, as shown in the figure. Since the tilt angle detected by the conventional mobile phone does not include the effect of the offset angle θ in the present invention, the rotation detection cannot be performed at a tilt angle of ±90 degrees. Referring to FIG. 6B, the correction range is, for example, between the inclination angles θ _TH1 to -θ _TH1 ' and θ _TH2 ~-θ _TH2 ' of the display surface 11d, and θ _TH1 and -θ _TH1 ' and θ _TH2 and - θ _TH2 ' is asymmetrical with respect to the spatial horizontal line H. In one embodiment, θ _TH1 = θ _TH + θ and - θ _TH1 ' = - θ _TH + θ; θ _TH2 ' = θ _{TH -} θ and - θ _TH2 ' = - θ _{TH -} θ, but this is not limit. In Figs. 6A and 6B, the symbol V is the spatial vertical direction and the symbol H is the spatial horizontal direction.

When the processing unit 13 determines that the tilt angle θt or the corrected tilt angle (θt±θ) meets the operable angle range, the processing unit calculates a rotation direction according to the three-dimensional acceleration, for example, calculates a rotation according to the following formula (2). Angle θ _o ; In the description of the present invention, the rotation angle θ _{o is} defined as an angle of rotating the portable electronic device clockwise or counterclockwise when the Z direction is the axis,

When the rotation angle θ _o exceeds a rotation threshold, for example, but not limited to, a rotation angle of 30 to 60 degrees, the processing unit 13 generates a direction control signal Sc to control the display direction of the display 11 to rotate the image according to the rotation direction.

Therefore, the method for detecting rotation of the portable electronic device of the present embodiment may include the following steps: calculating a tilt angle of the portable electronic device in three-dimensional space according to the three-dimensional acceleration detected by an acceleration sensor; ???the at least one detection array of the acceleration sensor and one of the display surfaces of one of the displays has an offset angle of less than 90 degrees to correct the tilt angle and one of the preset ranges; and when conforming to an operable angle, according to The three-dimensional acceleration calculates a direction of rotation. Two embodiments will be described below.

Please refer to FIG. 7A, which shows a flowchart of a method for detecting rotation of a portable electronic device according to an embodiment of the present invention, which can be applied to the portable electronic device of the first embodiment and the second embodiment. 1 and 1 ' . As described above, the acceleration sensor 12 (12 ' ) of the embodiment of the present invention is configured to detect a first acceleration a _{X in} one of the X directions parallel to the display surface 11d of the display 11 (Fig. 5A). Or having a first acceleration a _{X in} one of the X directions of the offset angle θ (Fig. 3A), detecting a second acceleration a _Y in the Y direction parallel to the display surface 11d (3A, 5A) And detecting a third acceleration a _Z (3A, 5A) in one of the offset angles θ in one of the normal directions of the display surface 11d.

Rotation detection method of the present embodiment comprises the steps of: displaying an image in a first direction (step S _21); detecting acceleration data (step S _22); calculating an inclination angle (step S _23); calculating a correction angle of inclination (step S _24); determining whether the correction is located at a predetermined tilt angle range (step S _25); a rotational direction is calculated (step S _26); and displaying the image in a second direction (step S _27). Please refer to the drawings 3A, 4, 5A and 7A at the same time, and then the embodiment of the embodiment will be described. FIG. 4 is a block diagram showing a portable electronic device according to an embodiment of the present invention, which is applicable to both the first and second embodiments.

Step S _21: First, the display 11 displays the image in a first direction, for example, landscape or portrait.

Step S _22: The acceleration sensor 12 (12 ') to the first sensing array 121, second array 122 and third sensing sensing array 123 are sensing a first acceleration a _X, a second acceleration a _Y and a third acceleration a _Z (ie, three-dimensional acceleration) are transmitted to the processing unit 13.

Step S _23: The processing unit 13, for example, in the formula (1) based on the first acceleration a _X, a _Y acceleration of the second and the third acceleration calculating a _Z 1 of the portable electronic device (1 ') in three-dimensional space A tilt angle θt on the upper.

Step S _24: Since the present invention comprises the effect of the inclination angle [theta] t [theta] of the offset angle, then the processing unit 13 to the offset angle [theta] t [theta] correction of the inclination angle and generate a corrected tilt angle θts = (θ ± θt) The inclination angle of the display surface 11d is correctly indicated.

Step S _25: The correction processing unit 13 compares the inclination angle stored in advance in one of the θts predetermined range in the memory unit 16 (e.g., Figure 6A) determines the correction to the inclination angle is located θts operable range (± θ _TH In the embodiment, the preset range is, for example, between -75 and 75 degrees, but is not limited thereto. When the corrected tilt angle θts is not within the preset range, the corrected tilt angle θts may not be applicable to the rotation determination, and the processing unit 13 does not determine to receive the rotation sensor and re-receives the acceleration sensor 12 (12 ' ). next to a three-dimensional acceleration detected by the detecting time, i.e., returns to step S _22. When the corrected tilt angle θts is within the preset range (ie, conforms to the operable angle), then step _S26 is reached.

Step _S26 : The processing unit 13 calculates a rotation angle and a rotation direction in a three-dimensional space according to the first acceleration a _X and the second acceleration a _Y, for example, by Equation (2).

Step _S27 : When the rotation angle is greater than a rotation threshold, the processing unit 13 generates a direction control signal Sc to the display 11 to change the first display direction to a second display direction, for example, to a portrait display or a landscape orientation. display.

Referring to FIG. 7B, a flowchart of another method for detecting rotation of the portable electronic device according to the embodiment of the present invention is also applicable to the portability of the first embodiment and the second embodiment. Electronic devices 1 and 1 ' . The difference between this embodiment and the embodiment of FIG. 7A is that the processing unit 13 in FIG. 7B does not correct the tilt angle θt (ie, does not include step S ₂₄ ), but directly stores the tilt angle θt in advance. The correction range in the memory unit 16 (as in Fig. 6B) is compared to determine whether the tilt angle θt is within the operable range (θ _TH1 ~ - θ _TH1 ' , θ _TH2 ~ - θ _TH2 ' ). The process proceeds to step S ₂₆ when the inclination angle θt is located in the correction range (θ _TH1 ~ θ _TH1 'or θ _TH2 ~ θ _TH2') within (i.e., the angle is operable compliance); otherwise, the process returns to step S ₂₂ to the acceleration The sensor 12 (12 ' ) re-detects the three-dimensional acceleration. In this embodiment, the implementation of the steps of the same reference numerals as in FIG. 7A is similar, and thus will not be described again.

It can be understood that the steps 7A and 7B do not show some steps, such as filtering, coordinate change, and judging whether it is a rotation operation or the like, and since it is not the subject of the present invention, it will not be described herein. The invention is to enable the portable electronic device to detect the direction of rotation under actual operating conditions.

In addition, the present invention may be implemented in other manners, as long as the third detection array for detecting the third acceleration a _Z and the normal direction Z ′ of the display surface 11 d have the offset angle θ. Wherein the offset angle θ is less than 90 degrees (excluding 0 degrees and greater than 0 degrees). For example, the acceleration sensor 12 of FIG. 3B and the processing unit 13 are simultaneously disposed on the first circuit substrate 14, and the offset angle between the upper/lower surface of the first circuit substrate 14 and the display surface 11d is θ, as shown in FIG. 8 , the first detection array 121 and the second detection array 122 are parallel to the upper/lower surface of the first circuit substrate 14 and the third detection array 123 is perpendicular to the first circuit substrate 14 . The upper/lower surface has the offset angle θ (or the complementary angle 90-θ with the offset angle θ from the display surface 11d) from the normal direction of the display surface 11d; or the third package is transmitted through the special package shape. FIG acceleration sensor 12 is provided at the time of the first circuit board 14, the third acceleration direction of a _Z Z Z direction normal to the display surface 11d 'having the offset between the angle [theta] (or the display surface 11d The first detection array 121, the second detection array 122, and the third detection array 123 are perpendicular to each other, since the acceleration sensor 12 can be tilted. The first circuit substrate 14 is disposed on the first circuit substrate 14 to have at least one detection array (for example, the third detection array 123) and the display surface 11d. Offset angle θ less than 90 degrees.

It should be noted that, in the first embodiment of the present invention, the second circuit substrate 15 is preferably only used to set the acceleration sensor 12 to reduce the volume of the second circuit substrate 15. However, in other embodiments, some of the components disposed on the first circuit substrate 14 may be disposed on the second circuit substrate 15 without particular limitation.

In summary, the prior art does not detect the angle of rotation of the display surface of the display parallel to the horizontal plane of the space, thereby causing limited use. Therefore, the present invention further provides a portable electronic device (Figs. 3A, 5A, and 8) and a rotation detecting method thereof (Figs. 7A and 7B), which are only when the tilt angle is actually not operated by the user. The rotation angle cannot be detected, so there is no inconvenience in use. In addition, as long as the current software program corrects the tilt angle or corrects the range of the operable tilt angle, it can be applied to the portable electronic device of the present invention, so that it has excellent applicability.

While the present invention has been disclosed by the foregoing examples, it is not intended to be construed as limiting the scope of the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. Therefore, the scope of the invention is defined by the scope of the appended claims.

1‧‧‧Portable electronic device

10‧‧‧shell

11‧‧‧ Display

11d‧‧‧ display surface

12‧‧‧Acceleration sensor

13‧‧‧Processing unit

14‧‧‧First circuit board

15‧‧‧Second circuit substrate

16‧‧‧Memory unit

17‧‧‧Power Control IC

18‧‧‧Fixed parts

Θ‧‧‧ offset angle

XYZ‧‧‧Axis of display

X ' Y ' Z ' ‧‧‧ Acceleration of the axial direction of the sensor

Claims (15)

A portable electronic device includes: a display having a display surface for displaying an image; an acceleration sensor for detecting three-dimensional acceleration; and a processing unit for calculating the portable type according to the three-dimensional acceleration a first circuit substrate having a first surface parallel to the display surface, wherein the display is electrically connected to the first circuit substrate; and a second circuit substrate electrically connected The first circuit substrate has a second surface, wherein the second surface and the first surface have an offset angle of less than 90 degrees, and the acceleration sensor is disposed on the second surface. The portable electronic device of claim 1, wherein the processing unit is disposed on the first surface, and corrects the tilt angle according to the offset angle. The portable electronic device of claim 1, wherein the processing unit further determines whether the tilt angle is within a correction range, wherein the correction range is obtained by correcting a preset range by the offset angle, and The correction range and the preset range are used to define an operable angle that does not cover a ±90 degree tilt angle and the correction range covers a ±90 degree tilt angle. The portable electronic device of claim 1, wherein the processing unit further calculates a rotation direction of the portable electronic device in the three-dimensional space according to the three-dimensional acceleration, and the display is rotated according to the rotation direction. The image. The portable electronic device of claim 1, wherein the second circuit substrate is electrically connected to the first circuit substrate through a flexible printed circuit board. The portable electronic device of claim 1, wherein the acceleration sensor has a first detection array, a second detection array, and a third detection array for detecting the three-dimensional acceleration. The first detection array and the display surface have the offset angle, the second detection array is parallel to the display surface, and the third detection array has the offset from a normal direction of the display surface Angle. A portable electronic device includes: a display having a display surface for displaying an image; and an acceleration sensor having a plurality of detection arrays for detecting three-dimensional acceleration, wherein the plurality of detection arrays At least one of the display surfaces has an offset angle of less than 90 degrees with the display surface; and a processing unit for calculating an inclination angle of the portable electronic device in three-dimensional space according to the three-dimensional acceleration. The portable electronic device of claim 7, wherein the plurality of detection arrays comprise a first detection array, a second detection array, and a third detection array, the first detection The array has an offset angle with the display surface, the second detection array is parallel to the display surface, and the third detection array has the offset angle from a normal direction of the display surface. The portable electronic device of claim 7, wherein the method further comprises: a first circuit substrate having a first surface parallel to the display surface, wherein the display is electrically connected to the first circuit substrate, wherein the acceleration sensor is disposed on the first surface, and the plurality of detection arrays comprise a first detection array, a second detection array, and a third detection array, the first detection array and the second detection array being parallel to the first surface and the third detection array and the first The offset angle is between a surface. The portable electronic device of claim 7, wherein the processing unit further corrects the tilt angle according to the offset angle. The portable electronic device of claim 7, wherein the processing unit further determines whether the tilt angle is within a correction range, wherein the correction range is obtained by correcting a preset range by the offset angle, and The correction range and the preset range are used to define an operable angle that does not cover a ±90 degree tilt angle and the correction range covers a ±90 degree tilt angle. The portable electronic device of claim 7, wherein the processing unit further calculates a rotation direction of the portable electronic device in the three-dimensional space according to the three-dimensional acceleration, wherein the display is based on the rotation direction. Rotate the image. A method for detecting a rotation of a portable electronic device, the portable electronic device comprising a display, a circuit substrate and an acceleration sensor electrically coupled to the circuit substrate, the acceleration sensor for detecting The three-dimensional acceleration has at least one detection array and one display surface of the display having an offset angle of less than 90 degrees. The rotation detection method includes: calculating the portable electronic device in three-dimensional space according to the three-dimensional acceleration a tilt angle Correcting the tilt angle by the offset angle to generate a corrected tilt angle or correcting a preset range by the offset angle to generate a correction range; comparing the tilt angle with the correction range or comparing the corrected tilt angle with the preset a range; and when the tilt angle is within the correction range or the corrected tilt angle is within the preset range, a rotation direction is calculated according to the three-dimensional acceleration. The rotation detecting method of claim 13, wherein the correction range and the preset range are used to define the operable angle, the preset range does not cover a ±90 degree tilt angle and the correction range covers ±90 Degree of inclination. The rotation detecting method of claim 13, further comprising: rotating the image on the display according to the rotation direction to change a display direction.