TWI627579B - Displacement compensation method for mobile device screen - Google Patents

Abstract

A method for compensating a screen of a mobile device screen is performed by a mobile device having a dynamic sensing unit, a screen and a controller, the controller executing a job and displaying a screen corresponding to the job by the screen, and the displacement compensation method The method includes: (a) the controller obtains a raw quantity representing the motion state of the mobile device from the dynamic sensing unit; (b) the controller converts the original quantity into a displacement amount; (c) the controller determines whether the displacement amount falls a preset range; if yes, performing step (d); and (d) summing the opposite values of the displacement amount and an original state value of the screen to calculate a feedback state value, and the screen displays the screen according to the feedback state value. With a small amount of shaking of the mobile device, the screen can be kept in a fixed position regardless of displacement or rotation.

Description

Displacement compensation method for mobile device screen

The invention relates to a displacement compensation method, in particular to a displacement compensation method for a screen of a mobile device.

As the technology of smart phones grows faster, people use them more and more frequently. Since wireless internet is easy to use everywhere, people can browse their smart phones outdoors. However, the problem has followed. When people use smart phones and ride cars, trains, or any means of transportation, focusing on the screen can be offensive or disgusting. This problem is caused by a rapid sway displacement between the eye and the screen, or an object that is caused by long-term swaying. Therefore, the best way to solve this problem is to reduce the sloshing displacement.

Accordingly, it is an object of the present invention to provide a method of displacement compensation for a screen of a mobile device that controls the screen to remain in a fixed position.

Therefore, the method for compensating the displacement of the screen of the mobile device of the present invention is performed by a mobile device having a dynamic sensing unit, a screen and a controller connected to the component, the controller performing a job and The screen displays a screen corresponding to the job. The displacement compensation method includes:

(a) the controller obtains from the dynamic sensing unit an original magnitude representative of the motion state of the mobile device;

(b) the controller converts the original magnitude into a displacement amount;

(c) the controller determines whether the displacement amount falls within a predetermined range; if yes, performing step (d);

(d) summing the opposite value of the displacement amount and an original state value of the picture to calculate a feedback state value, and the screen displays the picture according to the feedback status value.

Preferably, the present invention further comprises performing a step (e) of switching from a normal mode of a screen picture to a fixed screen picture mode before all steps, and performing when the determination of the step (c) is negative. Step (f) switches back to the normal mode, and the screen displays the picture based on the original status value.

Or modeless switching, when the determination of the step (c) is no, the step (g) is executed by the screen to display the picture according to the original state value.

Or, if the judgment of the step (c) is no, the step (h) is performed, so that the displacement amount is equal to the value closest to the displacement amount in the preset range, and the opposite value of the displacement amount is related to the screen. The original state values are summed to calculate a feedback state value, which is displayed by the screen according to the feedback state value.

The displacement amount includes a line displacement caused by a line displacement, the original state value includes an original coordinate value, and the calculated feedback state value includes a feedback coordinate value.

Further, the displacement amount further includes an angular displacement caused by an angular displacement, the original state value further including an original angle value, and the calculated feedback state value further includes a feedback angle value.

In an embodiment of the present invention, the original magnitude is a linear acceleration value, and the step (b) calculates each component of the linear displacement using each component of the linear acceleration value, and uses each of the linear acceleration values. The component calculates the inverse tangent function value to obtain the angular displacement.

In the foregoing, the preset range in which the line displacement amount is compared in the step (c) may be half the length of the screen size, and the preset range to be compared by the angular displacement may be ±45°.

More preferably, the screen extends straight along a y-axis and extends laterally along an x-axis perpendicular to y, defining a z-axis that is perpendicular to the x-axis and the y-axis and intersects the line. The components of the x-axis, the y-axis and the z-axis are respectively calculated by an iterative iteration to calculate a gravitational acceleration value, and compared with the original line acceleration value to obtain an instantaneous acceleration value. Then, using the kinematic equation and iteration to obtain the line displacement, and the component of the gravitational acceleration value on the y-axis is divided by the component on the x-axis to obtain the tangent value of the angular displacement, and then anyway The angular displacement is obtained by the calculation of the tangent function.

The effect of the novel is that under the small shaking of the mobile device, whether the displacement or the rotation is small, the screen screen can be kept at a fixed position, thereby reducing the discomfort of the user's eyes.

The above and other technical contents, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals.

Referring to FIG. 1 and FIG. 2, a first preferred embodiment of the method for compensating the displacement of the screen of the mobile device of the present invention is performed by a mobile device 1 having a dynamic sensing unit 11, a screen 12, and a The controller 13 to which the aforementioned components are connected. In the present embodiment, the dynamic sensing unit 11 is an acceleration gauge, and the controller 13 executes a job and displays a screen corresponding to the job by the screen 12. The steps of the displacement compensation method are explained as follows.

Step S11 - is switched by the user operation (for example, clicking a preset function key) to switch from a normal mode of a screen (such as Annex 1) to a fixed screen mode, and step S21 is performed.

Step S21 - The controller 13 obtains, by the dynamic sensing unit 11, an original magnitude representative of the motion state of the mobile device 1. In this embodiment, the original magnitude is a linear acceleration value.

Steps S31 to S32 and steps S41 to S42 may be subsequently performed simultaneously or separately.

Step S31 - The controller 13 converts the original magnitude into a line displacement, and performs step S32. The specific implementation of the conversion line displacement amount will be described later.

Step S32 - The controller 13 determines whether the line displacement amount falls within a predetermined range. In the embodiment, the preset range of the line displacement amount is a range of plus or minus half of the screen size. (eg Annex 2)

Step S41 - The controller 13 converts the original magnitude into an angular displacement amount and performs step S42. The specific embodiment of the conversion angular displacement amount will be described later.

Step S42 - The controller 13 determines whether the angular displacement amount falls within a predetermined range. In the embodiment, the preset range of the angular displacement amount is a range of ±45°. (eg Annex 3)

If the determinations in step S32 and step S42 are both, that is, the mobile device has a small range of movement and/or rotation (such as the accessory 4), and is defined as shaking in the embodiment, the steps S33 and S43 are respectively performed. Otherwise, it is defined as belonging to the user's active movement and/or rotation behavior instead of shaking, and step S51 is performed.

Step S33 - The controller 13 sums up the opposite value of the line displacement amount and the original state value of the screen, calculates the feedback state value, and executes step S34. The original state value includes an original coordinate value, and the calculated feedback state value includes a feedback coordinate value.

Step S34 - The screen 12 displays the picture based on the feedback status value.

Step S43 - The controller 13 sums up the opposite value of the angular displacement amount and the original state value of the picture, calculates a feedback state value, and executes step S44. The original state value includes an original angle value, and the calculated feedback state value includes a feedback angle value.

Step S44 - The screen 12 displays the screen based on the feedback status value.

After the execution of both step S34 and step S44 is completed, step S21 is re-executed.

Step S51 - displaying, by the screen 12, the screen according to the original state value, that is, when the displacement amount is not regarded as the displacement amount of the shaking, the feedback compensation is not performed for the displacement amount (for example, attachments 5, 6); and step S52 is performed. .

Step S52 - Switch back to the normal mode.

The manner in which the controller 13 converts the original magnitude into a line displacement amount in step S31 will be described below. First, the gravitational accelerations in the three directions x, y, and z in the Cartesian coordinates are gx, gy, gz, and defined.

Gx=acceleration.x*0.1+gx*(1.0-0.1)

In order to obtain the gravitational acceleration in the x direction, in the present embodiment, it is calculated every 1/60 second to update gx. The acceleration.x is the original magnitude obtained by the dynamic sensing unit 11 of the controller 13, that is, the component of the acceleration value in the x direction, and 0.1 is a weight, and the gx is iteratively operated to obtain a more stable gx. Values, without drastic changes in the acceleration.x with short fluctuations. The y direction and the z direction are also defined and calculated.

Next, the instantaneous accelerations in the three directions x, y, and z in the Cartesian coordinates are ax, ay, az, and defined.

Ax=acceleration.x-gx

The significance of this is that the acceleration value of each moment is subtracted from the value of the gravitational acceleration that is continuously stable, so that the acceleration caused by the shaking can be determined. The y direction and the z direction are also defined and calculated.

Thus, the instantaneous velocity can be obtained by the kinematic equation v=v+a*Δt, that is, by substituting Δt=1/60 (seconds), vx=vx+ax*1/60 can be defined and calculated to obtain the instantaneous velocity in the x direction. Among them, although ax is a so-called instantaneous acceleration, it should be noted that ax is regarded as an average acceleration of 1/60 second in the past at a small time interval, that is, it is assumed that the time t(n) is obtained by the dynamic sensing unit 11. The original magnitude, and the calculated acceleration ax(n), is calculated from the instantaneous velocity vx(n-1) at time t(n-1), ie vx(n)=vx(n-1)+ax( n) *1/60.

Finally, d=d+v*Δt+1/2*a*(Δt)^2 is used to calculate the current line displacement, that is, define and calculate dx(n)=dx(n-1)+vx(n -1) *1/60+1/2*ax(n)*1/3600, the component of the line displacement in the x direction is available. The y direction and the z direction are also defined and calculated.

In step S41, gx and gy are acquired in the same manner as in step S31, and the tangent function value tangent=gy/gx of the angle can be calculated, and the arc tangent function can be further calculated to obtain the angular displacement amount. In addition, if the dynamic sensing unit 11 further includes a gyroscope, it can also be used to provide an angular displacement amount. In principle, the angular velocity about the rotation of the axis of the screen 12 through the mobile device 1 can be obtained from the gyroscope, and the rotation angle on the plane of the screen 12 can be further calculated as the angular displacement. The invention is not limited to the manner in which the angular displacement is specifically calculated.

In this embodiment, the manner of starting the fixed screen mode in step S11 is not limited, for example, the user can click a button to start, or separately design a judgment mode. After the displacement amount exceeds the preset range and the step S52 is exited from the fixed screen mode, the screen remains in the center of the screen 12, allowing the user to re-adjust the posture and then start the mode.

Referring to FIG. 3, a second preferred embodiment of the method for compensating the displacement of the screen of the mobile device of the present invention is substantially the same as that of the first preferred embodiment. The difference is that when the determination of step S32 is negative, step S61, step S42 is performed. If the determination is no, step S61 is performed, and step S61 is still maintained in the fixed screen mode, that is, the embodiment does not actively switch back to the normal mode, and another operation mechanism, such as a user clicking a preset function key, is required. Perform mode switching.

Step S61 - The screen 12 displays the screen based on the original state value, and step S21 is re-executed.

Therefore, when the line displacement exceeds the preset range, the center point of the screen will be set back to the center of the screen 12. When the amount of angular displacement exceeds the preset range, the screen will be rotated.

Referring to FIG. 4, the third preferred embodiment of the method for compensating the displacement of the screen of the mobile device of the present invention is substantially the same as the second preferred embodiment. The difference is that when the determination of step S32 is negative, the determination of step S71 and step S42 is performed. If no, step S81 is performed.

Step S71- setting the line displacement amount to a value closest to the line displacement amount in the preset range (half screen size), for example, the line displacement amount when the mobile device moves in the x direction by a screen width. That is, the screen width is half; then the opposite value of the set line displacement amount is added to the original state value of the screen to calculate a feedback state value, and step S72 is performed.

Step S72 - The screen is displayed by the screen 12 based on the feedback status value. Step S21 is re-executed.

Step S81 - setting the angular displacement amount to a value closest to the angular displacement amount in the preset range (±45°), for example, the rotation displacement of the mobile device is +90°, and the set angular displacement amount is +45°; Then, the opposite value of the set angular displacement amount is added to the original state value of the screen to calculate a feedback state value, and step S82 is performed.

Step S82 - the screen 12 displays the screen based on the feedback status value. Step S21 is re-executed.

Therefore, when the line displacement exceeds the preset range, or when the angular displacement exceeds the preset range, the screen will remain on the boundary of the preset range without jumping to the center of the screen 12, at any time if When the amount of displacement is reduced, the effect of fixing the screen image can be immediately achieved. That is to say, this embodiment not only avoids the need for the user to frequently restart the mode, but also avoids the sudden jump of the screen, and allows the user to fine-tune the center position and angle of the screen.

In summary, under the slight shaking of the mobile device 1, the screen 12 can be kept at a fixed position regardless of a small displacement or rotation, thereby reducing the discomfort of the user's eyes, so that the present invention can be achieved. The purpose.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

1. . . Mobile device

11. . . Dynamic sensing unit

12. . . Screen

13. . . Controller

S11. . . step

S21. . . step

S31~S34. . . step

S41~S44. . . step

S51~S52. . . step

S61~S62. . . step

S71~S72. . . step

S81~S82. . . step

1 is a system block diagram showing a first preferred embodiment of a method for compensating for a screen of a mobile device of the present invention;

Figure 2 is a flow chart illustrating the preferred embodiment;

3 is a flow chart showing a second preferred embodiment of the method for compensating the displacement of the screen of the mobile device of the present invention; and

Fig. 4 is a flow chart showing a third preferred embodiment of the method for compensating the displacement of the screen of the mobile device of the present invention.

Claims (10)

A method for compensating a screen of a mobile device screen is performed by a mobile device having a dynamic sensing unit, a screen and a controller coupled to the aforementioned component, the controller performing a job and displaying the pair by the screen A screen that should be operated, the displacement compensation method includes: (a) the controller obtains a raw quantity representing the motion state of the mobile device from the dynamic sensing unit; (b) the controller converts the original magnitude into a displacement amount; (c) the controller determines whether the displacement amount falls within a predetermined range; if yes, performing step (d), and if not, performing one of steps (e) and (f); d) summing the opposite value of the displacement amount and an original state value of the picture to calculate a feedback state value, wherein the screen displays the picture according to the feedback status value; (e) making the displacement amount equal to the preset The value closest to the displacement amount in the range, and the opposite value of the displacement amount is summed with the original state value of the screen, and the feedback state value is calculated, and the screen displays the screen according to the feedback state value; and (f ) by the screen according to the original state value The screen shown. According to the displacement compensation method of the screen of the mobile device according to the first aspect of the patent application, the method further includes a step (g) performed before all the steps, after receiving a user operation in a normal mode in the permanent state of the screen, switching to a a fixed screen mode, the fixed screen mode comprising steps (a) to (e), wherein the step (f) performed when the determination of the step (c) is negative is displayed by the screen according to the original state value Screen, switch back to normal mode and make the screen draw The face is always in the middle. According to the displacement compensation method of the screen of the mobile device according to the first aspect of the invention, wherein the determination of the step (c) is NO, the step (e) is performed, and the process returns to the step (a). According to the displacement compensation method of the screen of the mobile device according to the first aspect of the invention, wherein the determination of the step (c) is NO, the step (f) is performed, and the process returns to the step (a). The displacement compensation method for a screen of a mobile device according to any one of claims 1 to 4, wherein the displacement amount includes a line displacement caused by a line displacement, the original state value including an original coordinate value, and calculation The feedback status value includes a feedback coordinate value. The displacement compensation method for a screen of a mobile device according to claim 5, wherein the original magnitude is a linear acceleration value, and the step (b) calculates each linear displacement amount using each component of the linear acceleration value. Component. The method for compensating a screen of a mobile device screen according to claim 6, wherein the screen extends straight along a y-axis and extends laterally along an x-axis perpendicular to y, defining a simultaneous vertical x-axis and The y-axis and the z-axis passing through the intersection of the two, the components of the linear acceleration value are components on the x-axis, the y-axis, and the z-axis, respectively, and a gravity acceleration is calculated by defining an iterative iteration of the linear acceleration value The value is compared with the original line acceleration value to obtain an instantaneous acceleration value, and the line displacement is obtained by using the kinematic equation and iteration. a displacement compensation method for a screen of a mobile device according to claim 5, wherein the preset range of the line displacement amount in the step (c) is compared The circumference is half the length of the screen. The displacement compensation method for a screen of a mobile device according to any one of claims 1 to 4, wherein the displacement amount includes an angular displacement caused by an angular displacement, the original state value including an original angle value, and calculation The feedback status value is a feedback angle value. The displacement compensation method for a screen of a mobile device according to claim 9 of the invention, wherein the predetermined range in which the angular displacement is compared in the step (c) is ±45°.