WO2014108634A2

WO2014108634A2 - Portable interactive reading device and method for displaying a digital document on this device

Info

Publication number: WO2014108634A2
Application number: PCT/FR2014/050022
Authority: WO
Inventors: Pierre-Henri CUBAUD; Shuo-Hsiu Hsu; Clément PILLIAS
Original assignee: Conservatoire National Des Arts Et Metiers (Cnam)
Priority date: 2013-01-09
Filing date: 2014-01-08
Publication date: 2014-07-17
Also published as: EP2943949A2; FR3000825B1; WO2014108634A3; FR3000825A1

Abstract

The invention concerns an electronic portable interactive reading device comprising a screen having a display surface, a memory capable of recording at least one digital document representative of a digitised text and programmable electronic means capable of displaying an image of at least a part of the digital document on the screen. According to the invention, the display surface of the screen is disposed on an outer surface of a cylinder, the device comprises rotation detection means capable of detecting a first rotation of the screen about a first direction parallel to a generatrix of the cylinder, and the programmable electronic means are capable of modifying the image displayed on the screen in at least one direction transverse to the first direction, on the basis of said first rotation of the screen. The invention also concerns a method for displaying a digital document on this electronic portable interactive reading device.

Description

Portable interactive reading device and method of displaying a digital document on this device

TECHNICAL FIELD TO WHICH THE INVENTION RELATES The present invention relates generally to the field of portable electronic reading devices or digital reading or digital reading tablets.

It relates more particularly to a new type of portable device for interactive reading.

BACKGROUND

In recent years, digital readers have appeared for reading scanned books, viewing the content of digitized images or web pages. A common digital reader has a flat screen, generally rectangular in shape, similar to a printed paper page. The user downloads one or more scanned book files into memory and can read the scanned book page by page on the screen. Typically, the screen has tactile areas or the housing has contactors to allow the user to change the display of a scanned book by changing the displayed page or to change web page or browse a collection of images. Advanced features are usually available on a digital reader such as fast forwarding multiple pages, accessing the scanned table of contents, or hyperlinks to another digital document. There are also digital readers with a double-sided screen.

Digital readers are developing alongside the supply of available content.

However, digital readers can pose congestion problems, for example for reading in public transport. On the other hand, it is sometimes difficult to use a digital reading light while standing or lying down.

OBJECT OF THE INVENTION

In order to overcome the above-mentioned drawback of the state of the art, the present invention proposes a portable electronic device for interactive reading comprising:

a display screen having a display surface;

a memory adapted to record at least one document digital representative of an image file or digitized text file;

programmable electronic means adapted to display an image of at least part of the digital document on the screen. More particularly, there is provided according to the invention a portable interactive reading electronic device whose display surface of the screen is disposed on an outer surface of a cylinder, the device comprising rotation detection means adapted to detect a first rotation of the screen around a first direction parallel to a generatrix of the cylinder and the programmable electronic means being adapted to modify the image displayed on the screen in at least one direction transverse to the first direction, according to said first rotation of the screen.

This interactive reading device makes it possible to display or read a digital document such as digitized text larger than the display surface of the screen by a simple rotational movement of the device around it. an axis of rotation. The device allows a page change displayed without pressing a real or virtual button. This device avoids the user repeated actions of pressing a button likely to cause musculoskeletal disorders and wear of mechanical parts.

Other non-limiting and advantageous features of a portable interactive reading electronic device according to the invention are the following:

the device is adapted to modify the image displayed on the screen by scrolling the lines and / or columns of a digital document, preferably an image file or a scanned text file, with a scrolling speed depending on the first rotation detected;

the rotation detecting means are integral with the portable electronic device for interactive reading, and preferably integral with the screen,

the rotation detection means are adapted to detect a second rotation of the screen around a second direction, the second direction preferably being perpendicular to the first direction, and in that the programmable electronic means are adapted to modify the image displayed on the screen according to the second rotation detected; the rotation detection means are adapted to detect a third rotation of the screen around a third direction, the third direction preferably being perpendicular to the first direction and the second direction, and in that the programmable electronic means are adapted to modify the image displayed on the screen according to the detected third rotation;

the rotation detecting means comprise means for measuring a first angle of rotation around the first direction, means for measuring a second angle of rotation around the second direction and / or the third angle of rotation; around the third direction;

the rotation detecting means comprise at least one acceleration and / or speed sensor, said at least one sensor being adapted to measure a first angle of rotation around the first direction, a second angle of rotation around the second direction; direction and / or a third angle of rotation about the third direction;

the rotation detection means comprise at least one mechanical rotation detector by contact between a moving part and a fixed part, the mechanical rotation detector being adapted to detect at least a first angular position of the screen relative to the first one. direction ;

- The device comprises a first gripping member located at a first end of the cylinder and a second gripping member located at a second end of the cylinder;

- said gripping parts being integral with the screen;

- The first gripping piece is secured to the screen and the second gripping piece is rotatable relative to the screen around the first direction;

the first gripping piece and the second gripping piece are movable in translation along an axis of translation parallel to the longitudinal axis of the device;

the device comprises user interface means disposed on the first end of the cylinder and / or the second end of the cylinder;

- Optionally, the device comprises retractable handles; closed, these handles protect the display surface;

the user interface means comprise a contact detector. The invention also proposes a method of displaying a digital document, preferably of a textual type, for reading on a rigid screen in the form of a cylinder, the display surface of the screen being disposed on a curved outer surface of the cylinder, the method comprising the following steps:

a) displaying a first image corresponding to a first portion of the digital document on the screen, said first image having a dimension adapted to the peripheral surface of the cylinder to allow reading of said first image in a transverse reading direction to the generator of the cylinder;

b) detecting a first rotation of the screen around a first direction parallel to a generatrix of the cylinder;

c) recording in memory the direction and amplitude of said detected first rotation;

d) selecting in memory another image corresponding to another part of the digital document, said selection being a function of the direction and the amplitude of said detected first rotation;

e) displaying said other image of the digital document on the screen, said other image having a dimension adapted to the peripheral surface of the cylinder to allow the reading of said other image on at least a portion of the display surface of the screen, preferably in said transverse reading direction to the generatrix of the cylinder.

DETAILED DESCRIPTION OF AN EXEMPLARY EMBODIMENT The following description with reference to the accompanying drawings, given by way of non-limiting examples, will make it clear what the invention consists of and how it can be implemented.

In the accompanying drawings:

- Figure 1A schematically shows a perspective view of a portable interactive reading electronic device according to one embodiment of the invention; Figure 1B schematically shows a side view of the portable interactive reading electronic device of Figure 1A;

FIG. 2 is a block diagram of the main components of a portable interactive reading electronic device as represented in FIG. 1; FIGS. 3A-3B illustrate a mode of operation of the device of FIG. 1A during reciprocating movement of both hands for a normal speed reading;

FIG. 4 schematically represents the steps of a display method on a portable interactive reading electronic device according to one embodiment of the invention;

FIGS. 5A-5C illustrate a mode of operation of a device of the invention with a simultaneous movement of both hands for an overflight reading;

FIGS. 6A-6C illustrate other examples of modes of operation of a device of the invention controlled by different gestures of the user;

- Figure 7 illustrates another example of use of the device for reading in a language reading vertically, such as Chinese;

FIG. 8 illustrates an embodiment of the device with asymmetric gripping parts, one of which is mobile with respect to the part of the device comprising the screen;

- Figures 9A-9B illustrate an embodiment of the device with retractable gripping parts.

Device

FIGS. 1A-1 B schematically show a portable interactive reading electronic device (10) according to an embodiment of the invention seen in perspective (FIG 1A) and side (FIG 1 B). The interactive reading device (10) comprises a screen having a cylinder-shaped display outer surface (1). The screen thus forms a cylinder. More precisely, this cylinder is defined by a cylinder generator and by a closed control curve. Preferably, as illustrated in Figures 1A-1 B, the cylinder formed by the screen is a rigid cylinder of revolution about an axis (2) parallel to the cylinder generator. The cylinder preferably has a circular section and the closed guide curve is a circle.

The screen can be made from an OLED-type flexible screen or flexible electronic E-ink which is folded back on itself in the form of a cylinder or any other screen compatible with use in cylindrical form. The cylindrical screen generally comprises a connection or welding zone along a line parallel to the generatrix of the cylinder. The display is active on the entire periphery of the display surface outside the connection or welding area. According to a particular embodiment, the screen is a touch screen.

The interactive reading device (10) includes a first gripping member (3) at a first end of the barrel and a second gripping member (4) at a second barrel end. The first gripping piece (3) and the second gripping piece (4) are intended to be manipulated by the fingers of the left hand and respectively of the right hand of the user. As illustrated in FIG. 1A, the gripping pieces (3, 4) are respectively disposed at both ends of the cylinder. Advantageously, the gripping pieces (3, 4) have a section greater than the section of the screen (1), to avoid contact between the display surface of the screen (1) and a flat surface on which the interactive reading device (10) would be set. Preferably, the gripping pieces (3, 4) are cylindrical or prismatic. Advantageously, the gripping parts (3, 4) have a polygonal section, to prevent the device from rolling when it is placed on a flat surface. Preferably, the gripping pieces (3, 4) are of dissimilar appearance and / or shape in order to allow the user to recognize the reading direction associated with the text displayed on the display screen. The interactive reading device (10) has a base (5) at one end of the cylinder and another base (6) at the other end of the cylinder.

The portable interactive reading electronic device (10) makes it possible to display the image (1 1) of a digital document with a user-defined font and font (font and background). The portable interactive reading electronic device (10) comprises one or more specialized electronic circuits which, by numerical calculations, produce the image of the text to be displayed according to the fonts, colors, etc. The electronic circuits give the display commands to a screen controller. For example, the device comprises a system-based system-on-chip system that includes processors, accelerometers, power management integrated circuits, user interface and a screen controller. Such embedded systems, dedicated to digital tablet applications, are for example marketed by the company Freescale Alternatively, one can also consider a non-specialized electronic system that provides the same functions by computer program.

By way of nonlimiting example, the device (10) may also comprise one or more interface means (7) arranged for example on the base (5 and / or 6) or on a cylindrical metal ring placed on one side of the screen. The interface means (7) comprise for example one or more pushbuttons, pushbutton type and / or contact sensors. Advantageously, the interface means (7) also comprise connection means for enabling the transfer of data, digital documents or database of digital documents. The connection means comprise, for example, a wired USB connection connected to a host computer and / or a WiFi, 3G and / or 4G type connection to allow direct downloading of digitized texts from the Internet, without going through a computer. host. The interface means (7) can also be used for recharging a battery, for example via a USB type connection. The interface means (7) make it possible to group the main dialogue functions with the user. The interface means (7) can also be used to connect a removable storage medium, for example a USB key.

Figure 1B shows a side view of the portable interactive reading electronic device (10). This device is for example arranged so that the axis (2) is horizontal and allows a user to read the image (1 1) of the text displayed in a reading direction (8) transverse to the longitudinal axis of the device (10). The line (9) represents a vertical line.

The diameter and the length of the cylinder result from a compromise between the amount of text visible simultaneously on the display surface of the screen (1) and the maneuverability of the device (10) (FIG 1A). For example, the diameter of the cylinder is about 3 cm and the length of the cylinder is about 10 cm. Such dimensions correspond to a screen having a display area of about 9 x 9cm. The total volume of the device is thus about 70 cm ³ , the same volume as a flat-panel digital reading lamp, however, the form factor of the device (10) of the invention makes the device easier to carry on itself.

In addition to the components apparent in FIGS. 1A and 1B, the device comprises electronic components advantageously arranged inside. of the cylinder formed by the display surface of the screen (1) and the gripping parts (3, 4). In Figure 2, there is shown a block diagram of the main components of a portable electronic reading interactive device (10). The portable interactive reading electronic device (10) notably comprises a central unit (20), electronic or digital storage means

(21), interface means (18) and detection means (22). The central unit (20) is connected on the one hand to the display screen and on the other hand to the storage means (21), to the detection means (22) and to the interface means (18).

The detection means (22) comprise in particular motion detection means, including in particular at least one detector of a rotation of the device around an axis of rotation parallel to the generatrix of the cylinder. Advantageously, when the cylinder is of revolution, the detection means

(22) comprise a sensor for rotating a point on the surface of the screen around the axis (2) of revolution of the cylinder.

In this document, roll angle (R "roll") is understood to mean an angle corresponding to a rotation of the interactive reading device (10) around a first axis parallel to the generatrix of the cylinder formed by the screen. Preferably, when the screen is a cylinder of revolution, the first axis corresponds to the axis of revolution (2) of the cylinder. Even more preferably, the interactive reading device (10) is used in read mode so that the first axis is horizontal, more or less than ten degrees. Pitch angle (P "pitch") means an angle corresponding to a rotation of the interactive reading device (10) about a second axis perpendicular to the first axis. Preferably, in the reading position, the second axis is a horizontal axis, plus or minus ten degrees. A pitch angle means an angle corresponding to a rotation of the interactive reading device (10) about a third axis perpendicular to the first axis and the second axis. Preferably, in the reading position, the third axis is a vertical axis, plus or minus ten degrees.

In a preferred embodiment, the detection means (22) comprise an internal triaxial acceleration sensor, which makes it possible to determine the angles of roll, pitch of the device (10) relative to the vertical. To this end, a mini-inertial unit can be used, as used in smart phones. The inertial unit provides measurements of speed and linear acceleration. From these measurements, a processing system of the central unit (20) of the data deduces therefrom a measurement of the angles of rotation along three orthogonal axes linked to a fixed reference of the interactive reading device (10). The central unit thus collects the instantaneous rotation angles, which are for example sampled with a constant time interval. By way of example, an inertial unit comprising a triaxial accelerometer and three gyroscopes provides measurements at a frequency of 200 Hz. In order to reduce the power consumption of the device, it is possible to reduce the frequency of acquisition of the angles of rotation at ten or a few tens of Hz. The central unit stores in memory (21) the temporal measurements of rotation along at least a first axis of rotation, and preferably along a second and / or third axis of rotation. Advantageously, a three-axis coordinate system is defined in the space, the reference being centered on the center of gravity of the device by taking:

a first axis opposite the vertical of the place;

a second axis in the direction of the terrestrial magnetic pole of the place;

a third axis perpendicular to the first axis and the second axis. The mark thus defined corresponds to the reference generally used by an onboard inertial unit to measure the orientation of the device relative to this mark (Euler angles). The inertial unit advantageously comprises a tri-axis accelerometer and three gyroscopes and a compass.

According to another embodiment, the detection means comprise a contact ball detector adapted to detect a contact when the device is oriented angularly in a predefined direction with respect to a vertical line 9 and to detect an absence of contact outside the this orientation. It is therefore a two-state detector whose output signal is easy to process numerically. The contact ball is movable and comes into contact with a contact piece only when the portable interactive reading electronic device (10) is oriented in a predefined direction relative to an axis. This contact position constitutes a reference position for rotation detection. The contact ball detector makes it possible to detect the passage of the ball on the contact piece during a rotation of the device of interactive reading around an axis, preferably around the longitudinal axis (2). The contact ball detector detects a number of complete turns of the interactive reading device around its axis. A contact ball detector has the advantage of being inexpensive. However, this type of detector is insensitive to the direction of rotation. In the case of a simple rotation detector, which does not accurately measure an angle of rotation, the central unit (20) stores in the memory (21) the contact detection, possibly as a function of time.

The interactive reading device (10) advantageously uses detection or measurement of rotation as a function of time. A set of measurements or a series of measurements, for example variations of the angles of rotation (roll, pitch and / or yaw) of the device and the standard of an acceleration vector as a function of time, can be interpreted by a system of measurements. digital processing to identify a gesture of the user. In this case, the functions of the interactive electronic reading device (10) can be activated according to these predetermined codified gestures. A gesture corresponds to a sequence of positions and / or orientation of the interactive reading device (10) as a function of time. The angles of orientation of a gesture, the sequence between the different orientations and the angular variations as a function of time are parameters of each gesture. A particular gesture is advantageously defined by a range of values corresponding to each useful parameter, as illustrated with reference to FIGS. 3, 5 and 6.

The operating system of the electronic interactive reading device (10) allows the user to perform basic operations of a digital reader, among which by way of non-limiting example:

the transfer of digitized text files to the memory (21) from a host computer, for example via a USB link;

- the management of a library of texts downloaded into memory: deletion of unnecessary files, management of bookmarks, reading statistics (percentage read / to read, etc.);

- select a scanned text to read in the library, switch to reading mode, stop reading and return to the library

- adaptation of the display for the reader: font type and size, text and background colors; - change the display mode: text only, text and position in the book etc. ;

- management of the memory (reformatting) and of the electric autonomy (remaining time, triggering of the mode of sleep, ...);

- switch on and off the device, put on standby, exit from standby mode.

Specific functions may also be provided:

- choice of the dominant hand (push button to the left of the text or on the right) and the direction of progression of the reading (from top to bottom or from bottom to top)

- rule of correspondence between the angle of rotation and the quantity of text moved (equivalent of the proposed settings for the mouse under Windows or MacOs);

- fast scrolling and chapter jump setting.

Process

FIGS. 3A and 3B show a mode of operation of the device of FIG. 1A during reciprocating movement of both hands for normal speed playback. The user holds a gripping piece (3) at the end of the device (10) by the fingers of the left hand, and another gripping piece (4) at the end of the cylinder by the fingers of the right hand . The user can thus read the text displayed on the display surface of the screen (1) from a reading direction defined by the direction of his gaze towards the interactive reading device (10).

FIG. 4 schematically represents the steps of a display method on a portable interactive reading electronic device according to one embodiment of the invention.

After initialization of the device, the central unit selects a digital document from the memory (21). More precisely, the central unit loads a first part of this digital document. The computer system displays on the screen a first image corresponding to a first portion of the digital document, such that said first image has a dimension adapted to the cylinder display surface of the screen. The user-reader can thus view the first image in a reading direction transverse to the longitudinal axis (2) interactive reading device (10). Part of the first image displayed on the screen is hidden by the device itself and thus subtracted from the view of the user.

The user-reader progresses in the reading of the text image by rotating the interactive reading device (10) about its longitudinal axis (2) (see FIGS. 3A and 3B). In the example shown, the reading direction of the text is from left to right and from top to bottom.

When the display device operates statically, the first displayed image remains fixed with respect to a mark related to the display surface. In this case, after a complete revolution about the longitudinal axis (2), the user-reader could visualize the whole of the first image displayed.

The rotary reading device is particularly advantageous when the dimension of the image of the digital document, in particular an image of a text, is greater than the circumference of the screen 1. In this case indeed, the device makes it possible to progressively display different images of a text of which only a part is visible on the screen 1. Detection means, for example an accelerometer, measures the rotation R of the device (10) around the longitudinal axis (2). A computer processing system determines a second image to be displayed according to the first displayed image and the rotation measurement R. For example, for a scanned text file, the second image corresponds to an image of the following lines of the text of the first image, the offset of the number of lines between the first image and the second image being a function of the measurement of rotation.

For example, the advance in the text as a function of a rotation about the longitudinal axis is calculated according to four steps:

calculation of the variation of the roll (dr) since the last measurement;

- calculation of the advance in the display (dA) in linear proportion to dr; Low pass filtering of the dA advance to reduce the noise sensors

(dAa);

calculating the position of the portion of text to be displayed in the complete text (A).

Then, we give the order to display the portion of text. This may require cutting this portion of text into two parts located on either side of the weld of the screen.

The central unit delivers the second image on the display screen. The interactive reading device (10) thus modifies the displayed image of the text on the screen depending on the measurement of rotation around axis 2 (Fig. 3A-3B).

The device of the invention makes it possible to progressively advance the image of the lines of the text on the display surface of the screen (1) according to the direction and the amplitude of the rotation R of the device (10) around of its axis (2). For example, between Figure 3A and Figure 3B, the user rotates clockwise (looking at the device by its right side) and the image of the lines of the text moves on the screen in the same direction . Conversely, moving from Figure 3B to Figure 3A, the user rotates counterclockwise, and the text image on the screen moves counterclockwise.

The interactive reading device (10) thus provides a quasi-continuous reading mode without requiring a page change by a pressing action on a real or virtual button, which may hinder reading and cause musculoskeletal disorders .

Advantageously, the central unit 1 comprises a digital processing system of rotation and / or acceleration measurements from the sensors.

A scanned paperback contains about 250 words per page. It is estimated that a fast reader reads about 500 words per minute, or two pages per minute (see S. Dehaenne "The neurons of reading" chapter 1, Editions Odile Jacob, 2007).

A rotary reading device having a length of about ten centimeters and a diameter of about 3 cm can display about half a page of book. The number of lines and words displayed depends not only on the dimensions of the screen, but also on its resolution, the layout of the image file (font size, line spacing ...). In fast reading speed, the rotation of the rotating reading device is about 4 revolutions per minute, or about 24 degrees per second.

Consider a half-hour reading session, about 60 pages of a digitized paperback. Using a rotary reading device, as described in connection with the figures, a fast reader performs about 120 full turns of the device about its axis. The screen area determines the number of displayable words. By comparison, on a flat screen reader with the same screen area, reading 60 scanned pages requires 120 one-touch operations to read the equivalent of 60 book pages. The reading device Rotary makes it possible to read a digital document in a continuous way without breaking in the act of reading.

FIGS. 3A-3B illustrate the read mode in which the text moves forward or backward depending on the roll angle changes applied by the fingers of the right or left hand of the user. The posture of the fingers of the user makes it possible to manipulate the device. Specifically, the hands act as tongs and work alternately. For example, in Figure 3A, the thumb and forefinger of the left hand deviate from the device, the middle finger of the left hand remains in support of the device while the thumb and the forefinger of the right hand are in contact with the other end of the device. In Fig. 3A, the right hand applies a clockwise or counterclockwise rotation to advance or back the displayed text towards the user's eyes. In Fig. 3B, the thumb and forefinger of the left hand are in contact with the left end of the device while the thumb and forefinger of the right hand are moving away from the other end of the device. major of the right hand remaining in support of the device. In Fig. 3B, the left hand applies a clockwise or counterclockwise rotation to advance or back the displayed text towards the user's eyes.

Depending on the user and the dimensions of the device, the device can be manipulated with only two fingers of each hand, or three, four or five fingers of each hand.

Preferably, the rolling motion applied by the user's fingers between FIG. 3A and FIG. 3B makes it possible to increment a line of text in an almost fixed direction of view of the user. The roll motion illustrated in Figures 3A-3B may be repeated for line-by-line reading of the displayed text. For example, the user applies a rotation alternately by the fingers of the left hand on the first gripping piece (3) and then by the fingers of the right hand on the second gripping piece (4) and so on, which allows a relatively slow rotation of the reading device.

It is also possible to use the gripping pieces (3,4) asymmetrically. In this mode of use, one hand only ensures the permanent support of the device while the other hand ensures more rotation. Advantageously, in a particular embodiment, at least one of the gripping pieces (3,4) is hollow to allow additional gripping modes adapted to this use. Figure 8 illustrates another particular embodiment of the device with asymmetrical gripping parts. A first gripping piece (3) is secured to the part of the device comprising the screen and the second gripping piece (4) can for example freely rotate along the longitudinal axis (2) of the device. In this configuration, the rotation of the device (10) on its longitudinal axis is performed with one hand, the other hand ensuring the support of the device (10) without the rotation of the latter does not cause friction on the fingers.

The same handling modes can be used to navigate menus such as table of contents entries or a library catalog. The selection of a menu item is performed using the interface means (7).

FIGS. 5A-5C illustrate another example of gesture making it possible to perform the equivalent of the jump of pages or chapters on the interactive reading device (10). The gestures illustrated in fig. 5A-5C is based on a combined movement of the fingers of both hands. In the case of FIGS. 5A-5C, the user applies a rotation simultaneously by the fingers of the left hand on the first gripping piece (3) and by the fingers of the right hand on the second gripping piece (4), which allows a faster rotation of the reading device. By using both hands in cooperation, the reading device can be applied with greater acceleration than with one hand. The rotational movement illustrated in FIGS. 5A-5C corresponds to a rotational speed greater than the rotational movement of the movement illustrated in FIGS. 3A and 3B. Between FIGS. 5A and 5B, the user makes a movement, for example a fast rolling movement in one direction and followed by a slower return to the initial position of the hands, making it possible to display a passage of the following paragraph. Between Figures 5B and 5C, the user moves to display the text of a passage of a next chapter in the text.

The gesture example illustrated in FIGS. 5A-5C can be used to fast-forward or rewind the text. In another example, this gesture can also be used to go from chapter to chapter. In an exemplary embodiment, the standard A of the acceleration vector provided by the accelerometer is measured and this standard A is compared with gravity. The acceleration due to the force of gravity on the surface of the earth is equal to 1 g or 9.8 m / s ² . We can use the following rule: if A> 1 g then one is in jump operation mode (Fig. 5A-5C) otherwise one is in standard reading mode (Fig. 3A-3B). A threshold different from the gravity value (1 g) can advantageously be evaluated by a trial-and-error method and specified by the user in an interface.

Advantageously, the device comprises an interface allowing the user to configure the mode of operation of fast reading or chapter change corresponding to a fast rolling gesture applied simultaneously by the fingers of both hands. In an exemplary embodiment, the device comprises contact finger detection zones of the user. The absence of contact detection causes the scrolling to stop and immediately freezes the image displayed on the screen. A more abrupt rotation R by jerk, that is, an angular velocity greater than a predetermined threshold, can be interpreted by the digital processing system as a jump forward or backward in the text, depending on the direction of the rotation. In this case, the amplitude of the jump is proportional to the acceleration experienced by the device. Preferably, the animation of the text is not abrupt and simulates the physical behavior of inertia of a heavy object.

The reading or viewing of an image on the device (10) can also be performed in continuous scrolling mode. For example, the roll angle R of the cylinder can be used to determine the scrolling speed of the image on the screen, according to a pre-recorded correspondence rule. In this display mode, two-handed shooting is not necessary. This continuous scrolling mode is particularly advantageous in particular situations such as prolonged note taking, a disabled arm, etc.

In autoscroll mode, a reasonably functional threshold value range is determined by testing. The user can then refine the value of the automatic scroll threshold in an interface. For example, a running speed ranging from 0 words / minute to 1000 words / minute is defined according to whether the absolute value of the roll angle R is relative to the vertical 0 ° to + 90 °. The scrolling is done backwards or forwards in the text according to the sign of the angle of roll R.

In another mode of operation, the length of the lines of the text diminishes when the speed increases, to gradually reach the mode of operation of a prompter. Gestures involving a change in pitch angle can also be programmed (Fig. 6A-6C). In Figure 6A, the user holds the reading device by one or two hands, as in Figure 1A. In Figure 6B, the user changes the pitch angle of the device. Then, it returns to a reading position in Figure 6C. The set of movements to move from Figure 6A to Figure 6C can be performed by the right hand or left quite brightly, that is to say with an angle or speed of rotation defined with respect to a threshold predefined. The gesture illustrated in FIGS. 6A-6C is more restrictive than the previous modes of operation and therefore preferably reserved for less frequent navigation actions, such as direct access to the end or the beginning of a text or even the abandoning the reading of the current text access to a table of contents of a digitized book or the return to a level representing a digital library of digitized books.

Figure 7 illustrates the use of the device for reading a displayed image (1 1) in a vertically readable language, such as Chinese. In this configuration, the device can be held with one hand, by the gripping piece (3) or (4). More precisely, the fingers of the hand operate alternately. In a first phase, the thumb and forefinger rotate the device and, in a second phase, the set of fingers can support the device (10).

FIGS. 9A-9B illustrate a particular embodiment in which the portable electronic reading device (10) comprises retractable gripping pieces (13, 14). More specifically, the gripping pieces (13, 14) are movable in translation along the longitudinal axis (2) of the device (10) between a closed position and an open position. In a first configuration (FIG 9A), the grippers (13, 14) are in contact with each other and cover the entire screen to protect it. In a second configuration (FIG 9B), the gripping pieces (13, 14) are spaced from each other towards the ends of the device in order to make visible the screen and the displayed image 1 1. The start of the device may advantageously be conditioned by the spacing of the gripping parts (13, 14). Conversely, the standby is triggered when returning to the closed configuration illustrated in FIG. 9A.

In the example illustrated in FIGS. 9A-9B, the gripping pieces form a second cylinder coaxial with the cylinder of the display screen. Particularly advantageously, at least one of the gripping parts (13) itself comprises another electronic display, for example of cylindrical screen type. Preferably, such a gripping piece 13 with a display is configured to display a first type of information content when the gripping parts are in the closed position, and to display another type of information content when the gripping parts are in the open position. . Thus, the first gripping piece (13) displays, for example, the date and time in the closed position (see Fig. 9A) and the title and subtitle of the displayed image (1 1) on the screen of the device (10) in open position (see Fig. 9B).

In a particular embodiment, the rotary reading electronic device may also be equipped with a vibrator and / or a speaker to provide the user with haptic and / or audible feedback.

The electronic device for rotating reading can integrate a clock and an alarm (alarm function). For example, standing up causes an hourglass to be displayed if the wake-up mode is selected.

The electronic rotating reading device can become the control device of a more general interactive device, in the home (home theater, alarms), video game, presentation tools in the professional or teaching environment.

The electronic device for rotating reading can integrate the functions of a music player (walkman), and evolve into a smartphone (smartphone). Because of the rotation required for the interaction with the electronic device for rotating reading, the sound link for the user goes through a radio channel, of the Bluetooth type, for example.

The contact management and calendar functions can be adapted to the specific interface of the rotary reading electronic device.

Claims

1. Portable interactive reading electronic device (10) comprising:

a display screen having a display surface (1);

a memory adapted to record at least one digital document representative of an image file or a digitized text file;

programmable electronic means adapted to display an image (1 1) of at least part of the digital document on the screen;

characterized in that

the display surface (1) of the screen is disposed on an outer surface of a cylinder,

the device comprises rotation detection means adapted to detect a first rotation R of the screen around a first direction (2) parallel to a generatrix of the cylinder, and in that

the programmable electronic means are adapted to modify the image (1 1) displayed on the screen, in at least one direction transverse to the first direction, as a function of said first detected rotation of the screen.

2. A portable electronic interactive reading device according to claim 1 wherein the rotation detection means are integral with the portable interactive reading electronic device (10), and preferably integral with the screen.

A portable interactive reading electronic device according to claim 1 or claim 2 wherein the interactive reading device (10) is adapted to modify the image (1 1) displayed on the screen by scrolling lines and / or columns of a digital document, preferably an image file or a scanned text file, with a scrolling speed depending on the detected first rotation.

4. A portable interactive reading electronic device according to one of claims 1 to 3 wherein the rotation detection means are adapted to detect a second rotation of the screen around a second direction, the second direction preferably being perpendicular in the first direction, and in that the programmable electronic means are adapted to modify the image displayed on the screen according to the second rotation detected.

5. Portable electronic device for interactive reading according to one of the Claims 1 to 4 wherein the rotation detecting means is adapted to detect a third rotation of the screen about a third direction, the third direction preferably being perpendicular to the first direction and the second direction, and in that that the programmable electronic means are adapted to modify the image displayed on the screen according to the third rotation detected.

6. A portable electronic device for interactive reading according to one of claims 1 to 5 wherein the device comprises at least one acceleration sensor and / or speed, said at least one sensor being adapted to measure a first angle of rotation around in the first direction, a second angle of rotation about the second direction and / or a third angle of rotation about the third direction.

7. A portable electronic interactive reading device according to one of claims 1 to 6 wherein the rotation detection means comprise at least one mechanical rotation sensor by contact between a movable part and a fixed part, the mechanical rotation detector being adapted to detect at least a first angular position of the screen relative to the first direction.

8. A portable interactive reading electronic device according to one of claims 1 to 7 wherein the device comprises a first gripping member (3, 13) located at a first end of the cylinder and a second gripping member (4, 14). located at a second end of the cylinder.

9. A portable electronic interactive reading device according to claim 8 wherein the first gripping piece (3) and the second gripping piece (4) are integral with the screen.

10. A portable interactive reading electronic device according to claim 8 wherein the first gripping piece (3, 13) is integral with the screen and the second gripping member (4) (4, 14) is rotatable relative to on the screen around the first direction (2).

1 1. Portable electronic interactive reading device according to claim 8 wherein the first gripping member (13) and the second gripping member (14) are movable in translation along an axis of translation parallel to the longitudinal axis of the device.

12. Portable electronic device for interactive reading according to one of claim 8 to 11 comprising user interface means disposed on the first cylinder end and / or the second cylinder end.

A portable interactive reading electronic device according to claim 12 wherein the user interface means comprises a contact detector.

14. A method of displaying a digital document, preferably of a textual type, for reading on a rigid screen in the form of a cylinder, the display surface of the screen being disposed on a curved outer surface of the cylinder, the process comprising the following steps:

e) displaying said other image of the digital document on the screen, said other image having a dimension adapted to the peripheral surface of the cylinder to allow the reading of said other image on at least a portion of the display surface of the screen.