KR20100033242A - Driving method of electronic book terminal and the terminal thereby - Google Patents

Abstract

PURPOSE: A driving method and terminal of the E-book terminal. The movement of the terminal is used without the button operation for the scene change through the sensor built in. The scene change is controlled easily. CONSTITUTION: A sensor senses the acceleration information of the movement operation of the terminal. The angle of each shaft is produced from the acceleration information. The mean variation value at the cell unit calculates about the angle of each shaft(S701). The movement operation it is adjudged compared to the first standard value each mean variation value. The side consisting of the cell units to the time in which the movement operation is completed is the section calculates. In case for the side, the section smalls than the secondary reference value, the page ejection event inclines above statement, it is processed according to the direction of operation. In case for the side, the section smalls than the secondary reference value, it inclines above statement, the scroll event is processed according to the direction of operation.

Description

Driving method of electronic book terminal and its terminal {DRIVING METHOD OF ELECTRONIC BOOK TERMINAL AND THE TERMINAL THEREBY}

The present invention relates to a method of driving an e-book device. In particular, the sensor senses this when the user generates a movement in one of the up, down, left, and right directions by applying a built-in or external sensor or impacts the terminal. The present invention relates to a method of driving an e-book terminal capable of screen switching of data.

The present invention also relates to an e-book terminal operated by the driving method.

Recently, due to the development of information and communication technology and the acceleration of the Internet speed, a number of communication technologies using computers or mobile devices are emerging.

In particular, various digital contents are being developed based on such an information and communication network. Accordingly, general consumers have come to encounter electronic books or electronic books as digital contents rather than printed copies.

This e-book refers to a virtual device that can be used as a book by recording information such as text and images on an electronic medium, and users can download dozens of books at a time to a dedicated terminal that is easy to carry and carry. Can be read. In addition, the e-book means a large and clean image by adjusting the screen magnification, and means a book of a three-dimensional meaning utilizing not only a book but also a multimedia to see, hear and feel. In addition, it is also convenient that the e-book is cheaper than the printed copy and can be purchased separately only necessary parts. In addition, it is possible to enlarge and reduce a desired page by a user's operation and provide various page turning effects.

However, these operations are separately required to be operated through various button inputs to the terminal, causing inconvenience and inconvenience to the user. Therefore, when using an e-book through a portable terminal, the user should be provided with a minimal operation method and a simple operation environment.

Accordingly, the present invention was devised to solve the above problems, and an object of the present invention is to provide a portable device for easily controlling the screen switching of the display only by the movement of the terminal itself through a built-in sensor without a separate button operation for screen switching. An electronic book terminal and a driving method thereof are provided.

As a feature of the present invention for achieving the above object, a method according to an aspect of the present invention is a method for switching the screen of the e-book content displayed on the e-book terminal having an acceleration sensor, the sensor is provided to the user Detects the acceleration information of the terminal motion movement given by the mobile terminal in real time, and calculates the angular variation rate of the movement movement for a predetermined unit section from the acceleration information. And executing the page turning event of the screen, and below, executing the scrolling event of the upper, lower, left or right side of the screen.

In addition, the method according to another aspect of the present invention is a method for switching the screen of the e-book content displayed on the e-book terminal having an acceleration sensor, wherein the sensor is three-dimensional of the movement movement of the terminal given by the user An angle calculation step of sensing acceleration information of each axis in real time and calculating an angle of each three-dimensional axis in real time from the acceleration information; Calculating an average deviation value in a predetermined unit section with respect to the calculated angles of each of the three-dimensional axes; An operation determination step of determining whether the terminal movement operation is any one of tilting directions of the upper, lower, left and right sides of the terminal by comparing the average shift value with a predetermined first reference value; A variation section calculation step of calculating a variation section consisting of unit sections until the movement operation is completed; When the transition period is smaller than this reference value by comparing with the predetermined second reference value, the previous or subsequent page turning event is executed in the screen according to the determined direction of the tilting operation. According to the direction of the operation may include an event execution step of executing any one of the scroll event of the upper side, lower side, left side or right side. In this event execution step, the previous page turning event is executed when the determined tilt operation is upward or leftward of the terminal, and the subsequent page turning event is performed by the determined tilt operation being lower or lower of the terminal. May be executed in the right direction.

In addition, the method according to another aspect of the present invention is a method for switching the screen of the e-book content displayed on the e-book terminal having an acceleration sensor, wherein the sensor is three-dimensional of the movement movement of the terminal given by the user An angle calculation step of sensing acceleration information of each axis in real time and calculating an angle of each three-dimensional axis in real time from the acceleration information; Calculating an average deviation value in a predetermined unit section with respect to the calculated angles of the three-dimensional axes; An operation judging step of judging whether the terminal movement operation is an operation due to an impact on the left side or the right side of the terminal by comparing the average shift value with a predetermined third reference value; A variation section calculation step of calculating a variation section consisting of unit sections until the movement operation is completed; When the transition period is smaller than this reference value and smaller than this reference value, the previous or subsequent page turning event is executed according to the determined impact motion direction, and when it is equal to or greater than the reference value, the operation returns to the operation determination step. It may include an event execution step. In this event execution step, the previous page turning event may be executed when the determined impact operation direction is the left side of the terminal, and the subsequent page turning event may be executed when the determined impact operation direction is the right side of the terminal. have.

The step of calculating the variance section may include accumulating the speed of each section by integrating it for each unit section from the sensed acceleration information of each of the three-dimensional axes; When the speed is 0 in at least one unit section, it may be determined that the movement operation is finished, and the previous unit sections may be summed to calculate this as the variation section. The angle calculating step may remove noise by filtering the calculated average shift value, and the filtering may be performed by a moving average filter.

According to another aspect of the present invention, an e-book terminal includes a storage unit for storing e-book content, a CPU for reading or editing the e-book content from the storage unit, and a display unit for displaying the e-book content. The display device may further include an acceleration sensor to switch the screen of the e-book content by the above-described methods.

According to the present invention, the sensor is built in or external to the e-book terminal, and if the user generates a movement in one of the up, down, left, and right directions or impacts the terminal without a separate button manipulation for screen switching. By detecting this, the screen switching process of the e-book data is possible, which provides a user with more convenience and is suitable as a portable e-book terminal.

Hereinafter, with reference to the accompanying drawings, the present invention will be described in detail.

Figure 1a is a schematic structural diagram of an e-book terminal according to the present invention, Figure 1b is a perspective view showing the appearance thereof.

Referring to FIG. 1A, the e-book terminal 1 according to the present invention includes a sensor unit 10, a control unit 20, and an output unit 30.

First, the sensor unit 10 is a sensor for measuring acceleration and angular velocity, and a gyro sensor 14 that is a three-axis acceleration sensor or a two-axis acceleration sensor may be used. In addition, the sensor unit 10 measures the movement of the top, bottom, left and right of the terminal 1 using its axis, and detects the impact to the terminal 1 by using dynamic information of gravity acceleration and outputs the predetermined voltage. In addition, although the sensor units 10 and 14 may be attached to the external surface of the terminal 1 as shown in FIG. 1B, they may be embedded in the terminal 1. In addition, the sensor unit 10 may further include a camera 12 commonly used in the corresponding field, and may output the movement information by photographing the user or observing the movement of the pupil of the user.

In addition, the controller 20 may include an input processor 22, a central process unit (CPU) 24, and a memory 26. The input processor 22 receives a predetermined voltage output from the sensor unit 10 in real time, extracts tilt information described below, and extracts the N information using a low pass filter. Extract and use it as angle information. In this case, it is preferable that the low pass filter uses a moving average filter which will be described later. The CPU 24 controls the control of all devices in the terminal 1 and receives the angle information of the input processing unit 22 from the scroll event, the scroll event in the vertical direction or the left and right directions, the page turning event, It is determined that either the page turning event in the up-down direction or the left-right direction, and the variable control unit 34 to be described below to execute this. The memory 26 may store the angle information from the input processor 22, and may store various pieces of information that the terminal 1 accesses and downloads externally online or offline. The memory 26 is preferably a flash memory.

In addition, the output unit 30 includes a display unit 32 for displaying e-book content, and a variable control unit 34 for executing the above-described scrolling and page turning.

2A-2C illustrate examples of screen switching output according to motion detection of the e-book terminal 1 according to the present invention.

Referring to FIGS. 2A-2C, first, when the user carries the terminal 1 (FIG. 2A), if a light impact is applied to the lower right portion of the terminal 1, which is an area to which the sensors 10 and 14 are attached (FIG. 2A), FIG. 2b), a page turning event occurs through an angle change with respect to the axes of the sensors 10 and 14. Further, when the terminal 1 is tilted up, down, left, and right (FIG. 2C), a page turning event occurs when the change of the tilt angle is a short section, and a screen change occurs through a scroll event when the page 1 event is maintained for a predetermined period or more.

3A is an explanatory diagram showing a sensing axis of a 3-axis acceleration sensor used in the sensor unit of the e-book terminal according to the present invention.

As shown in FIG. 3A, in the present invention, it is preferable to use the 3-axis acceleration sensor 14 for the sensor unit 10 of the e-book terminal 1. At this time, the x-axis of the three-axis acceleration sensor 14 is the left and right movement of the terminal 1 in the secondary plane, the y-axis is the vertical movement of the terminal 1 in the secondary plane, z-axis is the terminal ( Each of the up and down movements of 1) is sensed, and the output voltage is transmitted to the input processor 22 in real time. For example, in a state in which the user grips the terminal 1 in parallel with the ground and does not move it, the z-axis senses the gravity acceleration amount of 9.8 m / sec ² and the x-axis and y-axis in the 3-axis acceleration sensor 14. Each axis detects 0m / sec ² and transmits it to the input processor 22.

FIG. 3B is a schematic diagram illustrating a format of data sensed and transmitted by the triaxial accelerometer of FIG. 3A.

As shown in FIG. 3B, the three-axis acceleration sensor 14 typically detects the state of the terminal 1 in real time on three axes x, y, and z so that the detected acceleration information of the x, y, z axes is The analog acceleration information of the continuous signal is converted into an encoded digital signal and transmitted to the input processing unit 22 as an ADC value (Analog Digital Convertor), which is a value between 0 and 255 in units of 1 byte.

4 is a flowchart schematically illustrating a process of an input processing unit processing information input from a sensor unit in an e-book terminal according to the present invention.

Referring to FIG. 4, the input processor 22 extracts a static acceleration value and a dynamic acceleration value from the sensor value 10, that is, the ADC value input from the three-axis acceleration sensor 14 (S401). S403). In this case, the static acceleration value is related to the degree of inclination of the three-axis acceleration sensor 14, that is, the angle detected in the x, y, z axis of the three-axis acceleration sensor 14, the dynamic acceleration value is the angle Is related to the degree to which each of these three axes changes during a predetermined period. In other words, the dynamic acceleration value is related to the movement of the terminal 1 generated by the user.

Then, the input processing unit 22 obtains the velocity for a predetermined period in each of the x, y, and z axes from the dynamic acceleration value (S404), and also the tilt value in each of the x, y, and z axes from the static acceleration value. , I.e., the inclined angles are respectively obtained (S405 and S406).

In order to reduce the motion recognition error, the input processor 22 obtains an average value of the extracted angles by using a moving average filter (S407). The processing contents of the input processing unit 22 will be described in more detail with reference to the following embodiments.

5A is a flowchart illustrating a process of obtaining a tilt angle of a terminal by an input processing unit according to an embodiment of the present invention.

Referring to FIG. 5A, first, the input processing unit 22 outputs each of the output voltages V _outx , of the x, y, and z axes from the 3-axis acceleration sensor 14. V _outy , V _outz ) are input (S501), and the gravity accelerations (A _x , A _y , A _z ) of the x, y, and z axes are calculated from the input (S501). That is, since the conventional three-axis acceleration sensor 14 outputs a predetermined voltage V _OFFSET when the acceleration value is 0, the current output voltage V _outx,. V _outy , V _outz ) and the gravity acceleration (A _x , A _y , A _z ) can be calculated from the ratio between V _offset .

In addition, a trigonometric function is applied from the gravitational accelerations A _x , A _y , and A _z to calculate a tilt value or angles ρ, φ, and θ for the x, y, and z axes (S503).

In addition, the output values of the sensor 14 are sensitive and unstable in the nature of the sensor 14, thus preventing proper operation recognition. Therefore, to reduce this error, a low-pass filter is passed and its implementation uses a moving average filter. That is, the calculated tilt value or angles ρ, φ, and θ are calculated as the average values ( degreeX , degreeY , degreeZ ) of these angles through a moving average filter (S504).

Hereinafter, the process will be described in more detail with reference to an embodiment of the present invention.

In this embodiment, the 3-axis accelerometer 14 uses MMA7260Q, which is an accelerometer from Freescale. The V _offset of this sensor is 1.65 V, which means the output voltage V _out when the acceleration value is 0. In addition, since the output voltage V _out can be measured in the range of -90 ° to + 90 °, that is, 180 °, the output voltage is generated up to 3.3V. In addition, since it has an ADC value between 0 and 255, which is 1 byte, it is divided into a total of 256 steps. Therefore, the voltage for each step amount 1 can be calculated based on 12.9 mV. That is, V _out is calculated as the output voltage of acceleration multiplied by the voltage 12.9 mV according to the change amount from the ADC value transmitted through the movement of the sensor 14 (S501). This can be summarized as follows:

식 1(S501)

Formula 1 (S501)

In this case, S is an output voltage corresponding to 1 g of the MMA7260Q, a sensor used in the present embodiment.

Subtracting V _OFFSET from the output voltage V _out and dividing it by S to calculate the respective gravity accelerations A _x , A _y , and A _{z on the} x, y, and z axes as follows (S502):

식 2(S502)

Formula 2 (S502)

In addition, the calculated gravity accelerations (A _x , A _y , A _z ) of each axis are tilt values or angles (x, y, z) for the x, y and z axes by applying a trigonometric function as shown in Equation 3 below. It can be calculated (S503), and, for example, when the terminal 1 is inclined obliquely in the vertical direction as shown in FIG.

식 3(S503)

Equation 3 (S503)

In addition, since the values of the tilt values or angles ρ, φ, and θ for the x, y, and z axes are sensitive and unstable as shown in FIG. 5C, the average values are obtained through a moving average filter. As shown in (b) of FIG. 5C, a waveform of a gentle curve in which noise is mostly removed is formed (S504). In other words, a moving average filter using n samples is applied as shown in Equation 4 below to obtain a tilt value or angle ( degreeX , degreeY , degreeZ ) for the x, y, and z axes.

식 4(S504)

Formula 4 (S504)

6A is a flowchart illustrating a process of obtaining, by an input processing unit, a movement operation speed of a terminal according to an embodiment of the present invention.

The present invention recognizes the completion of the movement operation of the terminal 1 by calculating the speed for a certain period, that is, the period before the movement operation is completed, from the accelerations of the x, y, and z axes from the three-axis acceleration sensor 14. do.

That is, referring to FIG. 6A, first, the acceleration values of the x, y, and z axes from the 3-axis acceleration sensor 14 are integrated to calculate the speed of each axis (S601).

The speed of the x, y, and z axes is calculated while increasing the interval until the movement operation is completed, that is, the variation interval (variance interval) (S602).

Then, the movement operation of the terminal 1 is inquired, which determines that there is no speed when the sample rate value of "0" is greater than a predetermined number, and recognizes that the movement operation is completed (S603). The variation section is stored in the memory 26 (S604). At this time, the predetermined number is preferably set to 25 or more. In addition, as will be described later, this transition section indicates a section from the start of the movement operation of the terminal 1 to completion, and the CPU 24 uses the variable controller 34 to display the display section 32 in accordance with the length and length of the transition section. Either the page turning event or the scroll event of the e-book displayed in the) is generated.

Hereinafter, the process will be described in more detail with reference to an embodiment of the present invention.

In the present embodiment, first, the acceleration values of the x, y, and z axes from the 3-axis acceleration sensor 14 are integrated to calculate the speed of each axis (S601). For example, in the case of the x-axis, when the current acceleration value of the x-axis is A _x [1] and the previous acceleration value is A _x [0], the current velocity variable velocityX [1] is integrated through the integral as shown in Equation 5 below. Save the velocity and execute shift for the next integral calculation:

식 5(S601)

Equation 5 (S601)

Then, the variation interval, which is the interval until the movement operation of the terminal 1 is completed, is increased.

식 6(S602)

Formula 6 (S602)

Then, if more than 25 sample rate values come to " 0 ", it is determined that there is no velocity and stores the variation section at this point in memory 26:

식 7(S603, S604)

Equation 7 (S603, S604)

The acceleration shown in FIG. 6B (a) is calculated from the above-described processing as the speed shown in FIG. 6B (b), and in particular from the time when the velocity (velocity) occurs in FIG. 6B (b). The point of time until the speed becomes "0" is recognized as the movement operation transition section of the terminal 1. As described above, a page turning event or a scrolling event is generated depending on whether or not the transition period exceeds a predetermined sample unit value.

FIG. 7 is a flowchart illustrating an operation of an e-book terminal based on the tilt angle and the transition interval of the terminal calculated in FIGS. 5A and 6A according to one embodiment of the present invention.

First, the CPU 24 uses the calculated tilt values or angles ( degreeX , degreeY , degreeZ ) for the x, y, and z axes as variance values, ie, variance X and variance, between the current angle and the previous angle on the sample interval. By calculating Y and variance Z as shown in Equation 8 below, average variation values in M sample sections are obtained, and preferably 50 or more sample sections (S701):

식 8(S701)

Equation 8 (S701)

In addition, in order to prevent the occurrence of an event due to the angle generated through the fine movement through the fine movement of the terminal 1, the predetermined condition is satisfied by comparing the average variation value ( varianceX , varianceY , varianceZ ) with a predetermined reference angle. Only when the motion of the terminal is determined. Preferably, since the angle that can be generated in one direction is 0 ° to 90 ° or 0 ° to -90 °, it is determined that tilting with directionality occurs when the change in angle is ± 40 ° or more (S714, S715, and S721). And S722, S728 and S729, S735 and S736.

Then, after determining the directionality as described above, in order to determine what event to generate according to whether the change in the slope through the fast movement or the change in the slope in the corresponding direction, calculate the variation interval (S716 and S717) , S723 and S724, S730 and S731, S738 and S739). In other words, this variation section is a criterion for determining the degree of angular change within a predetermined sample interval, which is completed as described above with reference to FIG. 6A (S601 to S604), by using the velocity obtained through the integration of the acceleration value. Obtained by performing a state check.

As a result, a transition interval is calculated from the time when the movement of the terminal is determined in the corresponding direction to the completion of the movement of the movement. If the variation interval is short, a page turning event is generated by judging it as a sudden movement with a large gradient change in a short interval. (S718 and S719, S725 and S726, S732 and S733, S739 and S740). In particular, when the movement operation of the terminal is determined in the left or upper direction, the previous page turning event is executed, and when it is determined in the right or lower direction, the next page turning event is executed. On the other hand, if the variation interval is long, it is determined that the gradient change is a slow motion and generates a scroll event (S718 and S720, S725 and S727, S732 and S734, S739 and S741).

Hereinafter, the above description will be described in more detail with reference to FIG. 7.

First, as described above, variance X, variance Y, and variance Z are calculated (S701).

If variance X <-40 and variance Z <-40 (S714), it is determined that the terminal 1 moves to the left (S715), and as described above with reference to FIG. 6A (S601 to S604), the integral of the acceleration values is determined. By checking the completion state of the operation by using the speed obtained through the increase of the transition period until the movement operation of the terminal 1 is completed, that is, the speed is "0" (S716). This step is continued until a predetermined number, i.e., 25 or more sample rate values, " 0 " comes out and determines that the velocity is &quot; 0 &quot; If the calculated variation interval is smaller than the predetermined value (preferably 50) (S718), the CPU 24 executes the previous page turning event in the display unit 32 in association with the variable control unit 34 (S719). ). If the transition period is not smaller than a predetermined value (preferably 50) (S718), the CPU 24 executes a left scroll event on the display unit 32 in association with the variable control unit 34 (S720).

Further, if variance X &gt; 40 and variance Z &gt; 40 (S721), it is determined that the terminal 1 moves to the right (S722), and as described above, until the movement operation of the terminal 1 is completed, that is, The variation interval is increased until the speed becomes "0" (S723). As described above, this step continues until it is determined that the movement operation is completed (S724). If the calculated variation interval is smaller than the predetermined value (preferably 50) (S725), the CPU 24 executes a subsequent page turning event in the display unit 32 in association with the variable control unit 34 (S726). . If it is not small (S725), the right scroll event is executed (S727).

Further, if variance Y <-40 and variance Z> 40 (S728), it is determined that the terminal 1 moves upward (S729), and as described above, until the movement operation of the terminal 1 is completed, That is, the variation interval is increased until the speed becomes "0" (S730). As described above, this step continues until it is determined that the movement operation is completed (S731). If the calculated variation interval is smaller than the predetermined value (preferably 50) (S732), the CPU 24 executes the previous page turning event in the display unit 32 in association with the variable control unit 34 (S733). . If it is not small (S732), the upper scroll event is executed (S734).

Further, if variance Y> 40 and variance Z <-40 (S735), it is determined that the terminal 1 moves downward (S736), and as described above, until the movement operation of the terminal 1 is completed, That is, the variation interval is increased until the speed becomes "0" (S737). As described above, this step continues until it is determined that the movement operation is completed (S738). If the calculated variation interval is smaller than the predetermined value (preferably 50) (S739), the CPU 24 executes the page turning event on the display unit 32 in conjunction with the variable controller 34 (S740). . If it is not small (S739), the lower scroll event is executed (S741).

In addition, in the present invention, the page turning event can be executed by simply applying a light impact to one side of the terminal 1 without giving a large tilting operation to the angle change rate within a short period of time as described above. That is, the CPU 24 recognizes the impact of the terminal 1 to execute the page turning event.

That is, when an impact is applied to the lower left or right side of the terminal 1, the tilt angle according to this causes a momentary angle change in the left direction of the x-axis and the upper direction of the y-axis of the sensor 14, so that the angle change of the x-axis and y The change in the angle of the axis is determined as a reference value, and in this embodiment, when the impact on the lower left portion of the terminal 1 is performed, the change in the x-axis angle is 80 ° or more and the y-axis angle change is 40 ° or more (S702). In the case of the impact on the lower right portion of the terminal 1, the x-axis angle change is -80 ° or more and the y-axis angle change is 40 ° or more (S708). In this case, as described above, the variation interval is increased until the movement operation of the terminal 1 is completed, that is, until the speed becomes "0" (S703 and S709).

As described above, this step continues until it is determined that the movement operation is completed (S704, S710).

If the calculated variation interval is smaller than the predetermined value (preferably 30) (S705, S711), the CPU 24 determines that the sensor unit 10 is an impact and cooperates with the variable control unit 34 to display the display unit 32. Fires the page turning event. At this time, when it is determined that the impact on the lower left portion (S706), the previous page turning event is executed (S707), and when it is determined that the impact on the lower right portion (S712), the next page turning event is executed (S713).

8 is a flowchart illustrating an operation process of a terminal according to the present invention described above.

First, the sensor attached to the inside or outside of the terminal outputs the motion information of the terminal 1 in real time (S801).

Then, the output information is filtered using a moving average filter to reduce the motion recognition error (S802), and the angle shift of the terminal for a predetermined period is calculated therefrom (S803).

If the angular variation rate in the predetermined section is greater than or equal to a predetermined value (S804), it is determined whether the change is due to the impact of the terminal (S805), and if so, the previous or subsequent page turning event is executed on the screen displayed by the terminal (S806). ). If the angular shift in a predetermined section is smaller than a predetermined value (S804), it is determined whether the angular shift is in an upward or downward direction of the terminal (S807), and as described above, the previous page turning event is performed. In the case of the downward direction, the page turning event is subsequently executed (S808). Then, it is determined whether the angle shift is in the left or right direction of the terminal (S809). Similarly, in the left direction, the previous page turning event is executed, and in the right direction, the subsequent page turning event is executed (S810).

In addition, if the angular shift in a predetermined section does not exceed a predetermined value (S804), it is determined whether the angular shift is in the left or right direction of the terminal (S811), and if so, in the left or right direction on the display screen of the terminal. A scroll event is executed (S812). If the angle shift is not in the left and right directions of the terminal (S811), it is determined whether the angle shift is in the up or down direction of the terminal (S813), and accordingly, scrolling upward or downward on the display screen of the terminal. The event is executed (S814). At this time, as an embodiment of the present invention, the predetermined value may be arbitrarily set by the user to adjust the sensitivity of the screen switching operation of the terminal 1.

According to the present invention described above, the user can freely scroll or page through the displayed e-book contents by turning on the terminal 1, viewing the e-book displayed by the terminal 1, and giving the terminal itself an inclination or impact. You can switch.

 In addition, preferred embodiments of the present invention are disclosed for the purpose of illustration, anyone of ordinary skill in the art will be possible to various modifications, changes, additions, etc. within the spirit and scope of the present invention, such modifications, changes And additions should be regarded as within the scope of the claims. For example, a person having ordinary knowledge in the relevant field may attach a camera to the terminal 1 to photograph the movement of the pupil of the user by the camera and to combine the present invention with the movement pattern. The screen of the terminal can be switched. That is, a tool for analyzing the pattern of pupil movement is well known in the art, and analyzes the pattern of the detected pupil movement by using such a tool, and accordingly, a scroll event is generated when the tool is located at the bottom of the terminal for a predetermined time. You can also switch the screen without pressing a specific button.

1A is a schematic structural diagram of an e-book terminal according to the present invention;

FIG. 1B is a perspective view illustrating an appearance of the e-book terminal illustrated in FIG. 1A.

Figure 2a-2c is an illustration of the screen switching output according to the motion detection of the e-book terminal according to the present invention.

Figure 3a is an explanatory diagram showing a sensing axis of the three-axis acceleration sensor used in the sensor unit of the e-book terminal according to the present invention.

FIG. 3B is a schematic diagram illustrating a format of data sensed and transmitted by the triaxial accelerometer of FIG. 3A; FIG.

4 is a flowchart schematically illustrating a process of an input processing unit processing information input from a sensor unit in an e-book terminal according to the present invention.

5A is a flowchart illustrating a process of obtaining a tilt angle of a terminal by an input processing unit according to one embodiment of the present invention;

FIG. 5B is an exemplary diagram illustrating tilt values of angles ρ, φ, and θ of the x, y, and z axes when the terminal is inclined obliquely in the vertical direction in FIG. 5A.

FIG. 5C is an illustration of angles ρ, φ, θ (a) before filtering and angles ρ, φ, θ (b) after filtering in FIG. 5A.

FIG. 6A is a flowchart illustrating a process of obtaining, by an input processing unit, a movement operation speed of a terminal according to one embodiment of the present invention; FIG.

FIG. 6B is an exemplary diagram of a graph (a) of the unit section of the acceleration value detected in real time in FIG. 6A and a graph (b) of the unit section of the speed value calculated therefrom.

FIG. 7 is a flowchart illustrating an operation of an e-book terminal based on a tilt angle and a transition section of the terminal calculated in FIGS. 5A and 6A according to one embodiment of the present invention.

8 is a flowchart illustrating an operation process of a terminal according to an embodiment of the present invention.

<Code Description of Main Parts of Drawing>

Reference Signs List 1: electronic book terminal, 10: sensor unit, 20: control unit, 22: input processing unit, 24: CPU, 26: memory, 30: output unit, 32: display unit, 34: variable control unit

Claims (10)

In the method of switching the screen of the e-book content displayed on the e-book terminal having an acceleration sensor, The sensor detects in real time acceleration information of the terminal motion motion given by the user, and calculates an angle shift rate of the motion motion for a predetermined unit section from the acceleration information. When the angle shift rate is equal to or greater than a reference value, Executing a page turning event before or after the screen, and executing a scroll event of the upper, lower, left, or right side of the screen if less than that. In the method of switching the screen of the e-book content displayed on the e-book terminal having an acceleration sensor, The sensor includes an angle calculation step of detecting in real time the acceleration information of each of the three-dimensional axis of the terminal movement motion given by the user and calculating the angle of each of the three-dimensional axis in real time from the acceleration information; Calculating an average deviation value in a predetermined unit section with respect to the calculated angles of the three-dimensional axes; An operation judging step of judging whether the terminal movement operation is any one of tilting directions of the upper, lower, left and right sides of the terminal by comparing the average shift value with a predetermined first reference value; A variation section calculation step of calculating a variation section consisting of unit sections until the movement operation is completed; When the transition period is smaller than this reference value by comparing with the predetermined second reference value, the previous or subsequent page turning event is executed in the screen according to the determined direction of the tilting operation. And an event execution step of executing any one of a scroll event of an upper side, a lower side, a left side, or a right side in the screen according to the direction of the operation. The method of claim 2, In the event execution step, the previous page turning event is executed when the determined tilting operation is the upper or left direction of the terminal, and the subsequent page turning event is performed when the determined tilting operation is the lower or right direction of the terminal. And is executed in the case. In the method of switching the screen of the e-book content displayed on the e-book terminal having an acceleration sensor, The sensor includes an angle calculation step of detecting in real time the acceleration information of each of the three-dimensional axis of the terminal movement motion given by the user and calculating the angle of each of the three-dimensional axis in real time from the acceleration information; Calculating an average deviation value in a predetermined unit section with respect to the calculated angles of the three-dimensional axes; An operation determining step of comparing the average shift value with a predetermined third reference value to determine whether the terminal movement operation is caused by an impact on a left side or a right side of the terminal; A variation section calculation step of calculating a variation section consisting of unit sections until the movement operation is completed; When the transition period is smaller than this reference value and smaller than this reference value, the previous or subsequent page turning event is executed according to the determined impact motion direction, and when it is equal to or greater than the reference value, the operation returns to the operation determination step. And an event execution step. The method of claim 4, wherein In the event execution step, the previous page turning event is executed when the determined impact operation direction is the left side of the terminal, and the subsequent page turning event is executed when the determined impact operation direction is the right side of the terminal. How to. The method according to any one of claims 2 to 5, The variation interval calculation step Accumulating the velocity of each section by integrating it for each unit section from the sensed acceleration information of each of the three-dimensional axes; And determining that the movement operation is completed when the speed is zero in at least one unit section, and calculating the variation section by adding up previous unit sections. The method according to any one of claims 2 to 5, The angle calculating step may further include removing noise by filtering the calculated average shift value. The method of claim 7, wherein And the filtering is performed with a moving average filter. The method according to any one of claims 2 to 5, The angle calculating step is characterized by calculating the angle of each of the three-dimensional axis by the following equation.

Where ρ, φ, and θ are angles of each of the three-dimensional axes, ρ is the tilt angle of the x-axis, φ is the tilt angle of the y-axis, θ is the tilt angle of the z-axis, and A _x , A _y , and A _z are the three-dimensional angles. As each acceleration value of the axis, A _x is an acceleration value of the x axis, A _y is an acceleration value of the y axis, and A _z is an acceleration value of the z axis. An e-book terminal comprising a storage unit for storing e-book contents, a CPU for reading or editing the e-book contents from the storage unit, and a display unit for displaying the e-book contents. The e-book device further comprises an acceleration sensor to convert the screen of the e-book content according to any one of claims 1 to 5 e-book terminal.

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