WO2018209885A1

WO2018209885A1 - Image sensor and image sensing scanning system having same

Info

Publication number: WO2018209885A1
Application number: PCT/CN2017/105895
Authority: WO
Inventors: 张文波; 王虎岩; 韩晓伟; 王凤秀; 王家重; 曲涛
Original assignee: 威海华菱光电股份有限公司
Priority date: 2017-05-17
Filing date: 2017-10-12
Publication date: 2018-11-22
Also published as: CN107426511A

Abstract

Provided in the present invention are an image sensor, and an image sensing scanning system having same, the image sensor comprising: a frame, the frame having an accommodation cavity; an image reading part, the image reading part being disposed in the accommodation cavity; a translucent gap part, the translucent gap part being disposed on the frame, so as to cause a scanning light ray of an object to be scanned to pass through by means of the translucent gap, and shine directly onto a location of the image reading part. The present invention solves the problem in the prior art of an image sensor being too thick, and less convenient to use.

Description

Image sensor and image sensing scanning system therewith

Technical field

The present invention relates to the field of image sensing technology, and in particular to an image sensor and an image sensing scanning system therewith.

Background technique

The existing contact image sensor is composed of a frame body, a light source structure, a lens, a sensor chip, and a circuit board. The lens and the light source structure are usually disposed in the frame body, and the thickness of the frame body is not only affected by the thickness of the lens itself, but also Constrained by the focal length (TC value) of the lens, because for lens mounting, the lens usually needs to be spaced a distance from the upper surface of the frame so that the object to be scanned is at the focal position of the lens, and thus The contact image sensor is scanned to obtain a clear image on the object to be scanned. Therefore, the thickness of the existing contact image sensor is large, which is not conducive to the lightweight design of the contact image sensor, and affects the convenience of use of the contact image sensor. .

Summary of the invention

The main object of the present invention is to provide an image sensor and an image sensing scanning system therewith, which solves the problem of poor use of the image sensor in the prior art.

In order to achieve the above object, according to an aspect of the present invention, an image sensor includes: a frame having a housing cavity; an image reading portion, the image reading portion being disposed in the housing cavity; and a light transmitting slit portion, The light-transmissive slit portion is disposed on the frame such that the scanning light passing through the member to be scanned passes through the light-transmitting slit portion and is directly irradiated to the image reading portion.

Further, the light-transmissive slit portion is a strip-shaped light-transmissive groove formed on the frame body, and the strip-shaped light-transmissive groove is opened along the length direction of the frame body; and/or the light-transmissive slit portion is a plurality of transparent openings formed on the frame body. The light hole and the plurality of light transmission holes are spaced apart along the longitudinal direction of the frame.

Further, the width L of the strip-shaped light-transmissive groove is greater than or equal to 0.3 mm and less than or equal to 1 mm.

Further, the hole of the light transmission hole has a cross section of one of a circular shape, an elliptical shape, or a polygonal shape.

Further, the hole of the light transmission hole has a circular cross section, and the diameter D of the light transmission hole is greater than or equal to 0.3 mm and less than or equal to 1 mm; or the hole of the light transmission hole has a quadrangular shape, and the maximum side length S of the quadrilateral is greater than or equal to 0.3 mm. And less than or equal to 1mm.

Further, the light transmissive slit portion has a light transmissive space, and the surface of the light transmissive slit portion facing the light transmissive space is a reflective surface or a light absorbing surface.

Further, the image sensor further includes a transparent light guiding structure disposed at the light transmissive slit portion and filling the light transmissive space.

Further, the image sensor further includes a light transmissive plate disposed on the frame and located on a side where the light transmissive slit portion is located.

Further, the image reading unit includes: a substrate; a photosensitive integrated circuit disposed on the substrate and disposed opposite to the light-transmissive slit portion along a length direction of the transparent slit portion.

According to another aspect of the present invention, an image sensing scanning system is provided, comprising: an image sensor and a member to be scanned, the image to be scanned is movably disposed on the image sensor; and the light source structure and the light source structure are disposed opposite to the image sensor to face The scanned piece emits scanning light; the image sensor is the image sensor described above.

According to the technical solution of the present invention, the image sensor includes a frame body, an image reading portion, and a light transmissive slit portion, wherein the frame body has a receiving cavity, the image reading portion is disposed in the receiving cavity, and the light transmitting slit portion is disposed in the frame body. Upper, so that the scanning light that has passed through the member to be scanned passes through the light-transmissive slit portion and is directly irradiated to the image reading portion. In this way, under the premise that the image sensor has the complete image scanning function of the object to be scanned, and the lens and the light source structure are not installed in the accommodating cavity, the designer can reasonably reduce the volume of the accommodating cavity, thereby reducing the frame body. The overall thickness is beneficial to the miniaturization of the image sensor, so that the image sensor can be applied to various working conditions, and the image sensor is easy to carry or carry, which improves the convenience of image sensor and image transmission. The operational reliability of the scanning system.

DRAWINGS

The accompanying drawings, which are incorporated in the claims of the claims In the drawing:

1 shows a front cross-sectional view of an image sensing scanning system in accordance with an alternative embodiment of the present invention;

Figure 2 is a cross-sectional side view showing the A-A side of the image sensing scanning system of Figure 1;

3 is a front cross-sectional view showing an image sensor of the image sensing scanning system of FIG. 1;

Figure 4 is a top plan view of the image sensor of Figure 3 having a light transmissive slit portion of an alternative embodiment;

Figure 5 is a front cross-sectional view showing an image sensing scanning system in accordance with another alternative embodiment of the present invention;

Figure 6 is a cross-sectional side view showing the B-B side of the image sensing scanning system of Figure 5;

Figure 7 is a top plan view of the image sensor of Figure 5 having a light transmissive slit portion of an alternative embodiment;

Figure 8 is a top plan view of the image sensor of Figure 5 with a light transmissive slit portion of another alternative embodiment;

Figure 9 is a top plan view of the image sensor of Figure 5 with a light transmissive slit portion of another alternative embodiment;

10 is a front cross-sectional view showing an image sensor of an image sensing scanning system in accordance with another alternative embodiment of the present invention;

11 is a front cross-sectional view of an image sensing scanning system in accordance with another alternative embodiment of the present invention.

1, image sensor; 2, to be scanned; 3, light source structure; 33, light guide plate assembly; 34, illuminant; 35, light-emitting surface; 4, scanning light; 10, frame; 11, housing cavity; Hole; 20, image reading unit; 21, substrate; Photosensitive integrated circuit; 30, transparent slit portion; 31, light transmissive space; 32, body structure; 40, transparent light guiding structure; 50, light transmissive plate.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. The following description of the at least one exemplary embodiment is merely illustrative and is in no way All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to solve the problem of poor use of the image sensor in the prior art, the present invention provides an image sensor and an image sensing scanning system, as shown in FIG. 1 and FIG. 2, FIG. 5 and FIG. The image sensing scanning system comprises an image sensor 1, a member to be scanned 2 and a light source structure 3. The image to be scanned 2 is movably disposed on the image sensor 1, and the light source structure 3 is disposed opposite to the image sensor 1 to scan the object to be scanned 2 Light 4; Image sensor 1 is an image sensor as described above and below.

In order to improve the scanning effect of the image sensing scanning system, the light source structure 3 is optionally a linear light source. The light emitted by the light source structure 3 may also be sunlight or a light source from a light-emitting object such as a cell phone or a television.

Optionally, the to-be-scanned part 2 is an original, that is, a paper-like structure such as a banknote or a check. The image sensor 1 is movably provided, that is, by continuously moving the original, the image sensor 1 is scanned to acquire image information on the original. The image information includes text information and/or picture information.

Figure 3 shows a schematic front cross-sectional view of an image sensor 1 in accordance with an alternative embodiment of the present invention.

As shown in FIG. 3, the image sensor includes a frame body 10, an image reading portion 20, and a light transmissive slit portion 30. The frame body 10 has a housing chamber 11, and the image reading portion 20 is disposed in the housing chamber 11, and the light transmission slit portion 30 is provided. It is disposed on the frame 10 such that the scanning light 4 that has passed through the member to be scanned 2 passes through the light-transmissive slit portion 30 and is directly irradiated to the image reading portion 20.

Since the image sensor 1 includes the housing 10, the image reading portion 20, and the light transmissive slit portion 30, wherein the housing 10 has the housing chamber 11, the image reading portion 20 is disposed in the housing chamber 11, and the light transmissive slit portion 30 is disposed in The frame body 10 is such that the scanning light 4 that has passed through the member 2 to be scanned passes through the light-transmissive slit portion 30 and is directly irradiated to the image reading portion 20. In this way, under the premise that the image sensor has the complete image scanning function of the object to be scanned 2, while avoiding the installation of the lens and the light source structure in the accommodating chamber 11, the designer can reasonably reduce the volume of the accommodating chamber 11, thereby reducing The overall thickness of the frame 10 is advantageous for the miniaturization of the image sensor, so that the image sensor can be applied to various working conditions, and the image sensor is convenient to carry or carry, thereby improving the convenience of the image sensor. And the operational reliability of the image sensing scanning system.

Optionally, the transparent slit portion 30 is a strip-shaped transparent groove formed on the frame 10, and the strip-shaped transparent groove is opened along the length of the frame 10; and/or the transparent slit portion 30 is opened in the frame. A plurality of light transmission holes on the 10, and a plurality of light transmission holes are spaced apart along the longitudinal direction of the frame 10.

FIG. 4 shows an alternative arrangement of the transparent slit portion 30. In FIG. 4, the transparent slit portion 30 is a strip-shaped transparent groove formed on the frame 10, and the strip-shaped transparent groove is along the frame. The longitudinal direction of the body 10 is opened, and the arrangement of the strip-shaped light-transmissive grooves can not only allow the partial scanning light 4 to pass smoothly but to irradiate the photosensitive region of the image reading portion 20 to perform photoelectric conversion to obtain image information on the member to be scanned 2; It is also easy to manufacture and manufacture, which is advantageous for cost reduction of the image sensor 1.

It should be noted that, in order to avoid interference of other light rays on the scanning light to obtain clear image information of the scanning element 2, the width L of the strip-shaped transparent groove should be as small as possible, and the width L of the strip-shaped transparent groove A reasonable range is that the width L of the strip-shaped transparent groove is greater than or equal to 0.3 mm and less than or equal to 1 mm.

FIG. 4 shows an alternative arrangement of the transparent slit portion 30. In FIG. 4, the transparent slit portion 30 is a plurality of transparent holes formed in the frame 10, and a plurality of transparent holes are arranged along the frame. The bodies 10 are spaced apart in the longitudinal direction. The arrangement of the plurality of light-transmissive holes can also function to filter out unfavorable light, allowing a portion of the favorable scanning light 4 to smoothly pass through the image reading portion 20 to be irradiated to the photosensitive region of the image reading portion 20, also The image sensor 1 has the characteristics of simple processing, convenient use, and low cost; and the structural portion between the plurality of light-transmissive holes can support the frame 10 and improve the overall structural strength of the image sensor 1.

Optionally, the hole of the light transmission hole has a cross section of one of a circle, an ellipse or a polygon.

Specifically, in the alternative embodiment shown in FIG. 7, the hole of the light transmission hole has a circular cross section, and the diameter D of the light transmission hole is greater than or equal to 0.3 mm and less than or equal to 1 mm. In an alternative embodiment shown in FIG. 8, the hole of the light transmission hole has a quadrangular cross section, and the maximum side length S of the quadrilateral is greater than or equal to 0.3 mm and less than or equal to 1 mm. This can avoid interference of other light rays with the scanning light to obtain clear image information of the object to be scanned 2.

Of course, the transparent slit portion 30 can also be detachably disposed on the frame 10. In the alternative embodiment shown in FIG. 9, the frame 10 is provided with a mounting hole 12, and the transparent slit portion 30 is detachably disposed. At the mounting hole 12, the light-transmissive slit portion 30 includes a body structure 32 and the body structure 32 has a light-transmitting space 31. The light-transmitting space 31 is a strip-shaped light-transmissive groove formed on the body structure 32 or a plurality of structures along the body structure 32. A light-transmissive hole opened in the longitudinal direction.

It should be noted that the light-transmitting slit portion 30 in all the embodiments of the present application has a light-transmitting space 31, and the surface of the light-transmitting slit portion 30 facing the light-transmitting space 31 is a light-reflecting surface or a light-absorbing surface. When the surface of the light-transmitting slit portion 30 facing the light-transmitting space 31 is disposed as a reflective surface, part of the scanning light 4 is scattered after being transmitted through the object to be scanned 2, and a part of the scattered scanning light 4 is irradiated to the outside of the light-transmitting space 31, and the other portion is irradiated. The scattered scanning light 4 is irradiated into the light-transmitting space 31, and is irradiated into the scanning light 4 of the light-transmitting space 31, a portion directly passes through the light-transmitting space 31 to reach the photosensitive region of the image reading portion 20, and another portion of the scanning light 4 is irradiated. The surface of the light-transmitting slit portion 30 facing the light-transmitting space 31 is reflected, and can also be reflected to the photosensitive region of the image reading portion 20, thereby improving the quality of the image information obtained by the image sensor 1. When the surface of the light-transmitting slit portion 30 facing the light-transmitting space 31 is provided as a back-absorbing surface, the scanning light 4 irradiated to the surface of the light-transmitting slit portion 30 facing the light-transmitting space 31 is absorbed, and the image is not affected. The quality of the image information obtained by the sensor 1.

FIG. 10 shows another alternative embodiment of the image sensor of the present invention, which is different from the image sensor of FIG. 3 in that the image sensor further includes a transparent light guiding structure 40, and the transparent light guiding structure 40 is disposed at The light-transmissive slit portion 30 is filled and filled with the light-transmitting space 31. The arrangement of the transparent light guiding structure 40 can play a supporting role for the light-transmitting slit portion 30, preventing the cause The light-transmissive space 31 caused by the deformation of the frame 10 is changed to cause uneven light transmission effect of the image sensor 1. At the same time, the transparent light-guiding structure 40 can also improve the guiding property of the scanning light 4 entering the light-transmitting space 31, thereby improving Scan the brightness.

Alternatively, the transparent light guiding structure 40 is made of transparent plastic or transparent glass.

Optionally, the image sensor 1 further includes a light transmissive plate 50 disposed on the frame 10 and located on a side where the light transmissive slit portion 30 is located. The light-transmitting plate 50 not only has the function of carrying the member 2 to be scanned, but also prevents dust or foreign matter from entering the accommodating chamber 11 and affecting the normal operation of the image sensor 1.

It should be noted that the image reading unit 20 in the present invention includes the substrate 21 and the photosensitive integrated circuit 22, and the photosensitive integrated circuit 22 is disposed on the substrate 21 and disposed opposite to the transparent slit portion 30 along the longitudinal direction of the transparent slit portion 30. . The photo-sensitive integrated circuit 22 has a photosensitive region, and the photosensitive integrated circuit 22 can photoelectrically convert the scanning light 4 irradiated thereon to generate a photoelectric signal, and output the photoelectric signal through the driving circuit to obtain information that can be visually recognized by the user.

The working principle of the image sensing scanning system in this application is explained in detail below:

As shown in FIG. 1 and FIG. 2, the scanning light 4 emitted from the light source structure 3 is irradiated onto the object to be scanned 2, and a part of the scanning light 4 is reflected. For example, the scanning light 41 in the figure is irradiated to the N1 point and does not pass through the to-be-scanned part. 2, being reflected, the scanning light 41 cannot reach the light-transmitting slit portion 30. Of course, a part of the scanning light 4 is absorbed and cannot reach the light-transmitting slit portion 30; and a part of the scanning light 4 is transmitted through the member 2 to be scanned, for example, The scanning light 42 and the scanning light 43 in the figure are scattered by the scanning light 4 of the object to be scanned 2, that is, the scanning light 42 is scattered at the N2 point, and the scanning light 43 is scattered at the N3 point, wherein the scanning after scattering The light ray 42 illuminates the image reading portion 20, and a portion thereof is irradiated onto the photosensitive integrated circuit 22. The scanning ray 42 carries information about the transmission pattern at the N2 point of the member 2 to be scanned, and is collected by the photosensitive integrated circuit 22. The information is converted into a photoelectric signal, and by the continuous movement of the member 2 to be scanned, the information of the member to be scanned 2 is collected line by line and finally the transmitted image information of the member 2 to be scanned is obtained. It should be noted that after the scanning light 43 is scattered at the N3 point, a part of the scanning light 43 is also irradiated to the photosensitive integrated circuit 22, so that the information about the transmission pattern at the N3 point of the to-be-scanned part 2 is also collected. The information about the transmission pattern at the N2 point of the scanning member 2 collides, causing the transmission image to be unclear. However, the present invention can effectively reduce the scanning light 43 by transparently optimizing the size of the strip-shaped transparent groove or the light-transmitting hole. The light space 31, thereby improving the scanning accuracy of the image sensing scanning system.

As shown in FIG. 5 and FIG. 6 , the surface of the light-transmissive slit portion 30 facing the light-transmitting space 31 is provided as a reflective surface, and the light-transmissive slit portion 30 is a plurality of transparent openings formed on the frame 10 . The light ray, the scanning light ray 44 emitted by the light source structure 3 is scattered at the N4 point of the object to be scanned 2, and is divided into a scanning ray 441 and a scanning ray 442, wherein the scanning ray 442 is incident perpendicularly to the surface of the member to be scanned 2 and directly enters through. After the light hole is irradiated onto the photosensitive integrated circuit 22, the scanning light 441 is inclined into the light transmitting hole and totally reflected at the inner wall of the light transmitting hole, and can also be irradiated to the photosensitive integrated circuit 22, thereby improving the brightness of the transmitted image, thereby further Improve the scanning accuracy of the image sensing scanning system.

Figure 11 is a front cross-sectional view showing an image sensing scanning system in accordance with another alternative embodiment of the present invention. In this embodiment, the light source structure 3 includes a light guide plate assembly 33 and an illuminator 34 for illumination. The body 34 is located at the edge of the light guide plate assembly 33, and the light emitted from the illuminator 34 is conducted and reflected by the light guide plate assembly 33, and then uniformly emitted from the light-emitting surface 35 to form the scanning ray 4.

It is to be noted that the terminology used herein is for the purpose of describing particular embodiments, and is not intended to limit the exemplary embodiments. As used herein, the singular " " " " " " There are features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in the embodiments are not intended to limit the scope of the invention. In the meantime, it should be understood that the dimensions of the various parts shown in the drawings are not drawn in the actual scale relationship for the convenience of the description. Techniques, methods and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods and apparatus should be considered as part of the authorization specification. In all of the examples shown and discussed herein, any specific values are to be construed as illustrative only and not as a limitation. Accordingly, other examples of the exemplary embodiments may have different values. It should be noted that similar reference numerals and letters indicate similar items in the following figures, and therefore, once an item is defined in one figure, it is not required to be further discussed in the subsequent figures.

In the description of the present invention, it is to be understood that orientations such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" and the like are indicated. Or the positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of the description of the invention and the simplification of the description, which are not intended to indicate or imply the indicated device or component. It must be constructed and operated in a specific orientation or in a specific orientation, and thus is not to be construed as limiting the scope of the invention; the orientations "inside and outside" refer to the inside and outside of the contour of the components themselves.

For convenience of description, spatially relative terms such as "above", "above", "on top", "above", etc., may be used herein to describe as in the drawings. The spatial positional relationship of one device or feature to other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation of the device described. For example, if the device in the figures is inverted, the device described as "above other devices or configurations" or "above other devices or configurations" will be positioned "below other devices or configurations" or "at Under other devices or configurations." Thus, the exemplary term "above" can include both "over" and "under". The device can also be positioned in other different ways (rotated 90 degrees or at other orientations) and the corresponding description of the space used herein is interpreted accordingly.

In addition, it should be noted that the use of the words "first", "second", etc. to limit the components is only to facilitate the distinction between the corresponding components, if not stated otherwise, the above words have no special meaning, so can not understand To limit the scope of protection of the present invention.

It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or order. Should understand the data used in this way The embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

An image sensor, comprising:

a frame (10), the frame (10) has a receiving cavity (11);

An image reading unit (20), the image reading unit (20) is disposed in the receiving cavity (11);

a light-transmissive slit portion (30) disposed on the frame body (10) to pass the scanning light (4) passing through the member (2) to be scanned through the light-transmitting slit The portion (30) is directly irradiated to the image reading portion (20).
The image sensor according to claim 1, wherein

The light-transmissive slit portion (30) is a strip-shaped light-transmissive groove formed in the frame body (10), and the strip-shaped light-transmissive groove is opened along the length direction of the frame body (10); and/or

The light-transmissive slit portion (30) is a plurality of light-transmissive holes formed in the frame body (10), and the plurality of light-transmitting holes are spaced apart along the longitudinal direction of the frame body (10).
The image sensor according to claim 2, wherein the strip-shaped light-transmissive groove has a width L of 0.3 mm or more and 1 mm or less.
The image sensor according to claim 2, wherein the hole of the light transmission hole has a circular cross section, an elliptical shape or a polygonal shape.
The image sensor according to claim 4, wherein

The hole of the light transmission hole has a circular cross section, and the diameter D of the light transmission hole is greater than or equal to 0.3 mm and less than or equal to 1 mm; or

The hole of the light transmission hole has a quadrangular cross section, and the maximum side length S of the quadrilateral is greater than or equal to 0.3 mm and less than or equal to 1 mm.
The image sensor according to claim 1, wherein the light transmissive slit portion (30) has a light transmissive space (31), and the light transmissive slit portion (30) faces the light transmissive space (31) The surface is a reflective surface or a light absorbing surface.
The image sensor according to claim 6, wherein the image sensor further comprises a transparent light guiding structure (40), the transparent light guiding structure (40) being disposed at the light transmissive slit portion (30) The light transmissive space (31) is filled.
The image sensor according to claim 1, wherein the image sensor further comprises a light transmissive plate (50), the light transmissive plate (50) is disposed on the frame (10) and located at the through The side where the light slit portion (30) is located.
The image sensor according to claim 1, wherein the image reading unit (20) comprises:

Substrate (21);

a photosensitive integrated circuit (22) disposed on the substrate (21) and disposed opposite to the transparent slit portion (30) along a length direction of the transparent slit portion (30) .
An image sensing scanning system, comprising:

An image sensor (1) and a member (2) to be scanned, the object to be scanned (2) being movably disposed on the image sensor (1);

a light source structure (3) opposite to the image sensor (1) for emitting scanning light (4) toward the object to be scanned (2); the image sensor (1) is a claim The image sensor according to any one of 1 to 9.