CN218886610U - Electronic pen with scanning function - Google Patents

Abstract

The utility model discloses an embodiment provides an electronic pen who possesses scanning function, include the body, the end of body is the platykurtic, and the end is seted up and is run through the window of body from the thickness direction. The body is provided with a lens, and the included angle between the axis of the lens and the extending direction of the body is 25-35 degrees. The width of the window, the angle of view of the lens and the distance between the lens and the scanning plane when the axis of the lens is vertical to the scanning plane are set as follows: tan (omega/2) is less than or equal to W/2S. The embodiment of the utility model provides an in equipment makes the width of the formation of image breadth of the width more than or equal to camera lens that observes through the window to obviously improved the consistency of the what the window sees with the gained content of camera lens, make the user can accurate location read the position of operation, gain the effect that realizes seeing promptly the gained and brought better experience for the user.

Description

Electronic pen with scanning function

Technical Field

The utility model discloses an embodiment relates to the scanning equipment field, more specifically, the utility model discloses an embodiment relates to an electronic pen who possesses scanning function.

Background

This section is intended to provide a background or context to the embodiments of the invention that are recited in the claims. The description herein may include concepts that could be pursued, but are not necessarily ones that have been previously conceived or pursued. Therefore, unless otherwise indicated herein, what is described in this section is not prior art to the description and claims in this application and is not admitted to be prior art by inclusion in this section.

The electronic pen with scanning function is a device which scans by reading equipment, identifies the paper content, processes the paper content by a processor and outputs the result. The electronic pen with the scanning function generally structurally comprises a body, a processor arranged in the body and a reading device arranged on a pen point, wherein the reading device is electrically connected with the processor. In use, the user needs to align the reading device with the content to be identified and needs to scan according to a preset route. Due to the shielding of the body, a user cannot easily observe the content to be identified, and the reading equipment cannot be easily operated to align the content to be identified.

In the prior art, some improved methods have been developed, for example, a transparent window is provided in the identification area near the reading device, so that the user can observe the content to be identified during the process of placing the electronic pen and performing identification scanning, thereby making it easy for the user to operate the electronic pen to aim at the content to be identified.

SUMMERY OF THE UTILITY MODEL

However, the area range viewed through the viewing window is determined by the relative position relationship of the user and the viewing window, and the identification area of the reading device is determined by various properties of the reading device of the electronic pen, which are not necessarily consistent.

Therefore, in the prior art, the user needs to observe the identification area of the reading device through the window and then align with the content to be identified, and certain difficulties still exist in operation. This is a very annoying process.

Therefore, an improved electronic pen is needed to make the content observed by the window be consistent with the identification area of the reading device to the maximum extent, so that the window not only provides the observation function, but also has the function of marking the scanning area, and the user operation is simplified.

In this context, the embodiment of the present invention is intended to provide an electronic pen with a scanning function, which includes a main body 1, wherein the end of the main body 1 is flat, and the end is provided with a window 11 penetrating through the main body 1 in the thickness direction. The body 1 is provided with a lens 2. The included angle between the axis of the lens 2 and the extending direction of the body 1 is 25-35 degrees, the width of the window 11, the angle of view of the lens 2 and the distance between the lens 2 and the scanning plane when the axis of the lens 2 is vertical to the scanning plane during the scanning operation on the scanning plane are set as follows: tan (omega/2) is less than or equal to W/2S, wherein S is the distance between the lens 2 and a scanning plane when the axis of the lens 2 is vertical to the scanning plane during scanning operation on the scanning plane; omega is the angle of view of the lens 2 determined by the width of the imaging breadth of the lens 2; w is the width of the window 11. The position relationship between the lens 2 and the window 11 is: when the axis of the lens 2 is perpendicular to the scanning plane, the edge of the field of view of the lens 2 coincides with the edge of the side of the viewing window 11 close to the scanning plane.

In one embodiment of the present invention, the lens 2 is disposed on the side wall of the window 11 in the direction away from the end.

In an embodiment of the present invention, an included angle between the axis of the lens 2 and the extending direction of the body 1 is 30 degrees.

In an embodiment of the present invention, the end of the body 1 is provided with a chamfer 12, the chamfer 12 is located on the same side of the body 1 as the lens 2, and the chamfer 12 is formed by the missing part of the body 1 which shields the lens 2.

In an embodiment of the present invention, the side wall of the window 11 is inclined to the thickness direction of the body 1 and gradually converges in the direction close to the scanning plane.

In one embodiment of the present invention, the side wall edge of the window 11 is rounded or chamfered.

In an embodiment of the present invention, the two sides of the lens 2 are respectively provided with the illuminating lamps 3 along the width direction of the window 11, and the illuminating lamps 3 are symmetrical with the lens 2 as a center.

In an embodiment of the present invention, the projection direction of the illumination lamp 3 is the same as the orientation of the lens 2 or the projection direction of the illumination lamp 3 is deviated toward the orientation of the lens 2, and the included angle is smaller than 45 °.

The utility model discloses an in the embodiment, the projection area part of the light 3 of camera lens 2 both sides overlaps, covers the formation of image breadth of camera lens 2, and the regional setting of part overlapping is: the brightness value deviation of the imaging breadth area is less than 10%.

In an embodiment of the present invention, a control mechanism is disposed in the body 1, and the control mechanism is connected to the lens 2 for processing the image acquired by the lens 2.

According to the utility model discloses the width that sets up the window, the angle of field of the camera lens and the axis perpendicular to scanning plane of camera lens during camera lens and scanning plane and the marginal coincidence that is close to scanning plane one side of the visual field edge of camera lens and window, can realize that the width of window is the same with the visual field of camera lens or the width of identification area and one side edge of window and the marginal coincidence of visual field or be close to, thereby the window can play the effect of marking visual field or identification area's width and scanning initial position, make the user see through the regional similar or coincidence of the visual field of window observation and camera lens, thereby the degree of difficulty that the user aimed at the content of waiting to discern has been reduced remarkably, better experience has been brought for the user.

Drawings

The above and other objects, features and advantages of exemplary embodiments of the present invention will become readily apparent from the following detailed description, which proceeds with reference to the accompanying drawings. Several embodiments of the present invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which:

fig. 1 schematically shows a schematic view of an electronic pen suitable for implementing an embodiment of the invention;

fig. 2 schematically shows a schematic view of the geometric correspondence of the window width, the lens field angle and the lens position according to another embodiment of the present invention;

FIG. 3 schematically illustrates a schematic view of a tip of an electronic pen including a chamfer according to yet another embodiment of the present invention;

fig. 4 schematically shows a view of the structure of a window according to yet another embodiment of the present invention;

fig. 5 schematically shows a schematic view of an end portion of a body containing a light according to yet another embodiment of the invention;

fig. 6 schematically illustrates a schematic diagram of performing brightness compensation on an identification area of a lens by using a bilateral illumination lamp according to still another embodiment of the present invention.

In the drawings, like or corresponding reference characters designate like or corresponding parts.

Detailed Description

The principles and spirit of the present invention will be described below with reference to a number of exemplary embodiments. It should be understood that these embodiments are given solely for the purpose of enabling those skilled in the art to better understand and thereby implement the present invention, and are not intended to limit the scope of the invention in any way. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The inventor of the present invention has found that when a user scans with an electronic pen, the electronic pen is usually at a certain angle with the scanning plane. The scan of the lens may be distorted due to angular problems. Through the reasonable orientation that sets up the camera lens, can increase the scope of electronic pen inclination under the condition of distortion does not appear. The viewing field of the lens is related to the characteristics and the position of the lens, and the region observed through the window is close to or coincident with the viewing field of the lens by setting the relative position relationship between the lens and the window.

Having described the basic principles of the present invention, various non-limiting embodiments of the invention are described in detail below.

In this document, any number of elements in the drawings is by way of example and not by way of limitation, and any nomenclature is used solely for differentiation and not by way of limitation. The principles and spirit of the present invention are explained in detail below with reference to a number of representative embodiments of the invention.

Referring initially to fig. 1, a schematic diagram of an electronic pen 100 suitable for implementing embodiments of the present invention is shown.

In fig. 1, a plane a is used as a reference plane to describe the characteristics of the electronic pen according to the embodiment of the present invention. As shown in fig. 1, the electronic pen with scanning function includes, in a main body portion of the electronic pen: a body 1. The body 1 part is used for arranging modules such as a control system, a display screen, a voice playing module, an operation button, an induction panel and the like, and is also a part held by a user.

The tail end of the body 1 is flat, and the tail end is provided with a window 11 which penetrates through the body 1 from the thickness direction of the pen body. The tail end is the position close to the pen point, when a user uses the electronic pen to read, the position of the pen point is close to the content to be recognized, the window 11 is formed in the tail end of the body 1, and the content to be recognized can be observed conveniently through the window 11.

The body 1 is provided with a lens 2 (e.g., a camera), and the lens 2 is used as a reading device for acquiring content to be identified and transmitting the acquired content back to other processing modules in the electronic pen for subsequent processing. In an embodiment of the present invention, the reading mode is scanning.

As shown in fig. 1, when the user uses the electronic pen, the user usually makes the electronic pen at a certain inclination angle α with respect to the vertical direction, taking the paper surface as an example, and when the lens 2 faces the content to be recognized, the distortion of the acquired content is minimum, and when the lens 2 deviates from the forward facing direction, the acquired content is gradually distorted and increased.

Based on these two influencing factors, in the embodiment of the present invention, as shown in fig. 1, an included angle α between the axis of the lens 2 and the extending direction of the body 1 is set to be 25 to 35 degrees as a standard inclination angle. The extending direction of the body can be any one of the following directions: a direction pointing substantially away from the scan plane toward the center of gravity of the body starting from the end near the scan plane, or a gradient direction pointing substantially along the surface of the body away from the scan plane starting from the end near the scan plane, or a direction pointing substantially toward the other end of the body starting from the end near the scan plane. So that when the user uses the electronic pen, the electronic pen is tilted at a standard tilt angle and the axis of the lens 2 is approximately perpendicular to the scanning plane. Even if the electronic pen is continuously tilted, the magnitude of the deviation of the axis of the lens 2 from the direction perpendicular to the scanning plane is small, so that distortion due to the deviation of the lens 2 from the forward direction can be reduced.

Based on these two kinds of influence factor, the embodiment of the utility model provides an in, still set for the width of window 11, the angle of view of camera lens 2 and when the operation is scanned on the scanning plane, when the axis of camera lens 2 is perpendicular to the scanning plane distance between camera lens 2 and the scanning plane sets up to: tan (omega/2) is less than or equal to W/2S, wherein S is the distance between the lens 2 and a scanning plane when the axis of the lens 2 is vertical to the scanning plane, omega is the angle of view of the lens 2 determined by the width of the imaging breadth of the lens 2, and W is the width of the window 11. The width of the viewing window 11 refers to the dimension of the viewing window 11 in a direction perpendicular to the scanning direction and parallel to the scanning plane.

When the width of the window 11, the angle of view of the lens 2, and the distance between the lens 2 and the scanning plane during scanning operation on the scanning plane satisfy the above-mentioned relational expression, the width of the image formation width of the lens 2 is equal to or less than the width of the window 11.

In the field of electronic pens with scanning functions, the width of the image of the lens 2 is cut from the shooting range of the lens 2. The way of cropping may be by selecting physical occlusion or by algorithmic computation. In an embodiment of the present invention, the cutting can be selected to be square, so as to facilitate the identification of the square area. The imaging format of the lens 2 refers herein to the field of view of the lens 2 or the identification area of the lens 2 after having been occluded.

Fig. 2 exemplarily shows the geometrical correspondence between the window width and the lens field angle and the lens position.

As shown in fig. 2, according to the definition of the field angle: the angle of view is defined as the angle of view formed by the two edges of the lens 2 through which the object image of the object to be measured can pass, with the lens 2 as the vertex. The field angles typically include a horizontal field angle, a vertical field angle, and a diagonal field angle. When the lens 2 is selected, its angle of view is then determined. In an embodiment of the present invention, the horizontal angle of view or the vertical angle of view is used, and the width of the imaging format is used to measure the angle of view. The shaded portion in fig. 2 is the imaging swath. When the axis of the lens 2 is perpendicular to the scanning plane, the range of the lens 2 capable of shooting on the scanning plane is circular, and by setting conditions such as internal hardware shielding, the imaging breadth is square, and the width direction of the imaging breadth is parallel to the width W direction of the window 11. At this time, the distance between the lens 2 and the scanning plane is set to be S, and the field angle of the lens 2 is ω, so that the width of the imaging format can be calculated according to the pythagorean theorem to obtain 2S tan (ω/2).

The embodiment of the utility model provides an in, the width of injecing 11 width more than or equal to formation of image breadth of window for the width more than or equal to the formation of image breadth of camera lens 2 through the regional width more than or equal to that window 11 observes.

In the embodiment of the present invention, the position relationship between the lens 2 and the window 11 is further defined as: when the axis of the lens 2 is perpendicular to the scanning plane, the edge of the field of view of the lens 2 coincides with the edge of the side of the viewing window 11 close to the scanning plane. As shown in fig. 2, the edge of the field of view of the lens 2 is the edge of the imaging format on the side close to the end of the electronic pen, and is also the starting position of the lens 2 for reading the content, so that the user can accurately position the reading operation. In one embodiment, this can be achieved by adjusting the distance between the lens 2 and the scan plane when the axis of the lens 2 is perpendicular to the scan plane. In another embodiment, the shape of the window 11 may be adjusted, and during the processing, the window 11 is opened at a position corresponding to the edge of the field of view of the lens 2 when the axis of the lens 2 is perpendicular to the scanning plane.

As shown in fig. 1 or fig. 2, the position of the window 11 is provided, because the body 1 has a certain thickness, the lens 2 can be arranged in the region of the window 11, and is positioned on the side wall of the window 11 far away from the end, so as to protect the lens 2, and the side wall can incline towards the direction facing the lens, so that the lens is embedded therein, and the lens can be prevented from being blocked.

As shown in fig. 1, it is preferable that an angle α between an axis of the lens 2 and an extending direction of the body 1 is 30 degrees. According to the habit of the user when using the electronic pen, the included angle is set to be 30 degrees, so that the deviation range of the included angle is small when most of users use the electronic pen, and the lens 2 can be kept vertical relative to the scanning plane as far as possible.

When the lens 2 is arranged on the side wall in the window 11, the lens 2 is prevented from being shielded by the body 1 or other side walls of the window 11, the limiting condition for adjusting the installation position of the lens 2 can be reduced, and the installation position of the lens 2 preferentially meets the achievement of the above-mentioned what you see is what you get effect.

Fig. 3 schematically shows a schematic view of the tip of an electronic pen comprising a chamfer.

As shown in fig. 3, a chamfer 12 is provided at the end of the body 1, the chamfer 12 is located on the same side of the body 1 as the lens 2, and the chamfer 12 is formed by the missing part of the body 1 that shields the lens 2. According to an embodiment of the present invention, the chamfer 12 includes a machining of the side wall of the window 11 near the paper or scan plane end, reducing the obstruction of this side wall to the line of sight. According to an embodiment of the present invention, the chamfer 12 is a plane formed by connecting the cutting lines from the end far away from the end to the end near the end, and the plane forms an included angle with the extending direction of the body 1. However, the chamfer 12 of the present invention is not limited to a plane, and includes a curved surface and a special-shaped surface. When a curved surface or an irregular surface is set, the lens 2 is kept in contact with a paper surface or a scanning plane when being kept vertical to the paper surface, so that the user is assisted to adopt the inclination angle of the electronic pen with the best imaging effect.

Fig. 4 is a schematic diagram illustrating a structure of a window according to an embodiment of the present invention.

Fig. 4 is a view of a window viewed in the thickness direction of the body. As shown in fig. 4, a solid line indicates the contour of the side of the window 11 close to the user, and a dotted line indicates the contour of the side of the window 11 close to the scan plane. In fig. 4, the side walls of the window 11 in all three directions are inclined to the thickness direction of the body 1 and gradually converge in the same direction as the lens 2, that is, converge closer to the scanning plane. According to the utility model discloses an embodiment processes the lateral wall of window 11, makes window 11 form and comparatively open in one side opening that is close to the user, keeps away from one side opening of user and comparatively converges to can reduce the electronic pen when changing inclination, window 11 is to sheltering from of user's sight. According to the utility model discloses an embodiment, can also only process the lateral wall that is close to the scanning plane. According to the utility model discloses an embodiment can also make the edge of window 11's lateral wall be fillet or chamfer, further reduces sheltering from of window 11 to user's sight. The edges of the side walls of the viewing window 11 refer to the edges of the opening of the viewing window 11 on the side facing the user and the edges of the opening on the side facing away from the user.

Fig. 5 shows a schematic view of a body end portion including a light according to an embodiment of the present invention.

As shown in fig. 5, illumination lamps 3 are respectively disposed on both sides of the lens 2 in the width direction of the window 11, and the illumination lamps 3 are symmetrical about the lens 2. In order to make the lens 2 as faithful as possible to the reading of the content to be recognized, the illumination lamp 3 is provided for brightness compensation. The illuminating lamps 3 are respectively arranged from the two sides of the lens 2, so that the brightness of the surface of the recognized content is uniform when the recognized content is a plurality of lines of characters or patterns.

Fig. 6 is a schematic view exemplarily showing brightness compensation of a recognition area of a lens using a both-side illumination lamp.

As shown in fig. 6, when brightness compensation is performed on the content to be recognized, since the brightness of the illumination lamp 3 gradually attenuates from the illumination center to the periphery, according to an embodiment of the present invention, the projection direction of the illumination lamp 3 is the same as the orientation of the lens 2 or the projection direction of the illumination lamp 3 is oriented to the orientation of the lens 2, and the included angle is smaller than 45 °. So that the brightness of the area towards which the lens 2 is directed is enhanced as much as possible. Further, the projection areas of the illuminating lamps 3 on the two sides of the lens 2 are partially overlapped to cover the imaging breadth of the lens 2, and the partially overlapped areas are set as follows: the brightness value deviation of the imaging breadth area is less than 10%. The overlapping of the brightness of the two illumination lamps 3 in the overlapping portion can cancel the attenuation caused by the distance from the illumination center, so that the brightness can be kept uniform.

According to the utility model discloses an embodiment is provided with control mechanism in the body 1, and control mechanism is connected with camera lens 2 for handle the content that camera lens 2 acquireed. The control mechanism is a part for realizing the main functions of the electronic pen and is formed by combining a series of software and hardware. For example: display function, voice broadcast function, translation function, control function, etc. According to the utility model discloses an embodiment, adopt the electricity to be connected between control mechanism and the camera lens 2, realize that control camera lens 2 carries out functions such as content reading and passback.

The utility model discloses an in the embodiment, through setting for standard inclination for the user uses the electronic pen, uses standard inclination as the center slope, and the range of the skew perpendicular to scanning plane's of axis of camera lens orientation is still less, can reduce the distortion that leads to because the skew forward direction of camera lens.

The embodiment of the utility model provides an in, through the proportional relation between the distance between camera lens and the scanning plane when the axis perpendicular to scanning plane of the width of setting for the window, the angle of vision of camera lens and camera lens for the width of window width more than or equal to formation of image breadth, make the width more than or equal to the formation of image breadth of camera lens through the width more than or equal to the region that the window was observed. Further, by setting the position relation between the lens and the window, the user can accurately position and read the position of the operation, and the effect of realizing what you see is what you get is achieved.

The utility model discloses an in the embodiment, set for the scarf, can reduce sheltering from to the camera lens, be convenient for set for the position of camera lens according to the demand.

The utility model discloses an in the embodiment, through the opening convergence direction of setting for the window to and set for the chamfer or the fillet at window edge, can reduce sheltering from to the user realization.

The utility model discloses an in the embodiment, orientation through setting for the light and prescribe a limit to the overlap area of projection area, make formation of image breadth regional brightness value even.

It should be noted that although in the above detailed description several means or sub-means of the device are mentioned, this division is only not mandatory. Indeed, according to embodiments of the present invention, the features and functions of two or more of the apparatuses described above may be embodied in one apparatus. Conversely, the features and functions of one apparatus described above may be further divided into embodiments by a plurality of apparatuses.

Use of the verb "comprise", "comprise" and its conjugations does not exclude the presence of elements or steps other than those stated in a claim. The article "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.

While the spirit and principles of the invention have been described with reference to several particular embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, nor is the division of aspects which does not imply that features of the aspects are not to be combined to advantage, which division is merely for convenience of description. The invention is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. The scope of the following claims is to be accorded the broadest interpretation so as to encompass all such modifications and equivalent structures and functions.

Claims (10)

1. An electronic pen with scanning function is characterized in that the electronic pen comprises a main body (1),

the tail end of the body (1) close to the scanning medium is flat, and a window (11) penetrating through the body (1) in the thickness direction is formed in the tail end;

the body (1) is provided with a lens (2);

an included angle between the axis of the lens (2) and the extending direction of the body (1) is 25-35 degrees;

the width of the window (11), the angle of field of the lens (2) and the distance between the lens (2) and the scanning plane when scanning on the scanning plane and the axis of the lens (2) is vertical to the scanning plane are set according to the following relations:

tan(ω/2)≤W/2S，

wherein,

s is the distance between the lens (2) and the scanning plane when the scanning operation is carried out on the scanning plane and the axis of the lens (2) is vertical to the scanning plane;

omega is the angle of view of the lens (2) determined by the width of the imaging format of the lens (2);

w is the width of the window (11).

2. The electronic pen with scanning function according to claim 1,

the position relation between the lens (2) and the window (11) is as follows: when the axis of the lens (2) is vertical to the scanning plane during scanning operation on the scanning plane, the edge of the field of view of the lens (2) is coincided with the edge of one side of the window (11) close to the scanning plane.

3. The electronic pen with scanning function according to claim 1,

the lens (2) is arranged on the side wall of the window (11) in the direction far away from the tail end.

4. The electronic pen with scanning function according to claim 1,

the included angle between the axis of the lens (2) and the extending direction of the body (1) is 30 degrees.

5. The electronic pen with scanning function according to claim 1,

the tail end of the body (1) is provided with an inclined cut surface (12), the inclined cut surface (12) is positioned on one side of the body (1) which faces the same direction as the lens (2),

the oblique cutting plane (12) is formed by the part which is formed by the missing of the body (1) and shields the lens (2).

6. The electronic pen with scanning function according to claim 1,

the side wall of the window (11) is inclined to the thickness direction of the body (1) and gradually converges along the direction close to the scanning plane.

7. The electronic pen with scanning function according to claim 1,

the side wall edge of the window (11) is in a round angle or a chamfer angle.

8. The electronic pen with scanning function according to claim 1,

and illuminating lamps (3) are respectively arranged on two sides of the lens (2) along the width direction of the window (11), and the illuminating lamps (3) are symmetrical by taking the lens (2) as a center.

9. The electronic pen with scanning function according to claim 8,

the projection direction of the illuminating lamp (3) is the same as the orientation of the lens (2) or the projection direction of the illuminating lamp (3) deviates towards the orientation of the lens (2), and the included angle is smaller than 45 degrees.

10. The electronic pen with scanning function according to claim 8,

the projection areas of the illuminating lamps (3) on the two sides of the lens (2) are partially overlapped to cover the imaging breadth of the lens (2), and the partially overlapped areas are set as follows: the brightness value deviation of the imaging breadth area is less than 10%.

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