TWI516085B - Contact image sensing device - Google Patents

Description

Contact image sensing device

The invention relates to an image sensing module, in particular to a contact image sensing module.

The contact image sensor is a kind of line image sensor, which is mainly used in scanners, fax machines, and multifunction machines to scan flat images or documents into an electronic format, so as to facilitate Store, display or transfer.

The working principle of the contact image sensor is to illuminate the light generated by the light source onto the manuscript to be scanned, reflect the light through the manuscript, and focus the reflected light on the charge-coupled device (CCD) by using a lens group. Or on a photosensitive element such as a complementary metal oxide semiconductor (CMOS), the photosensitive element is used to change the signal of the light into an electrical signal, thereby generating analog or digital pixel data.

Referring to the first figure, it is a cross-sectional view of a conventional contact image sensor. The contact image sensor 1 includes a body 10, a light emitting element 12, a rod lens group 14, a sensing unit 16, and a mirror 18. The base 10 has a receiving slot 100 and a slot 102. The illuminating element 12 is disposed in the accommodating slot 100 for providing a light source provided when the contact image sensor 1 senses an object 22. The lenticular lens group 14 is disposed in the through groove 102. The sensing unit 16 includes a circuit board 160 and a plurality of photosensitive elements 162 disposed on the circuit board 160. The mirror 18 is provided The lenticular lens group 14 and the photosensitive element 162 are disposed to reflect light passing through the lenticular lens group 14 to allow light to enter the photosensitive element 162.

In actual use, a light emitted by the light-emitting element 12 is projected to the object 22 through a light-transmissive glass 20, and image light generated by the object 22 is transmitted to the mirror through the lenticular lens group 14. 18, and reflected by the mirror 18 and imaged on the sensing elements 162.

The use of the mirror 18 can effectively reduce the overall height of the contact image sensor 1 , but greatly increases the manufacturing cost, assembly complexity, and the body 10 of the contact image sensor 1 . Tolerance requirements.

In view of the prior art, it is an object of the present invention to provide a contact image sensing device.

To achieve the above objective, the present invention provides a contact image sensing device, a contact image sensing device for sensing an image of an object, the contact image sensing device comprising a body, a light emitting unit, and a column The lens array, a light transmissive element and a sensing unit. The base body includes a first accommodating groove, a groove substantially parallel to the first accommodating groove, and a second accommodating groove communicating with the through groove. The opening direction of the second accommodating groove is vertical In the opening direction of the first accommodating groove; the illuminating unit is disposed in the first accommodating groove and emits light toward the object; the lenticular lens array is disposed in the through slot; the transparent component comprises a body The light-emitting element is disposed in the through-groove and located under the lenticular lens array; the sensing unit is disposed in the second accommodating groove, and the sensing unit includes a plurality of sensing elements facing the light transmissive element, and one of the image light rays reflected by the object is transmitted to the total reflection surface through the lenticular lens array, and the total reflection surface reflects the image light. The image light is imaged onto the sensing elements.

Referring to the second and third figures, respectively, an exploded perspective view and a cross-sectional view of the contact image sensing device according to the first embodiment of the present invention. The contact image sensing device 3 is mainly applied to a scanner, a fax machine, and a multifunction printer for sensing an image of an object 4 disposed on the contact image sensing device 3 and imaging the object 4 Convert to analog or digital image data. The contact image sensing device 3 includes a body 30, a light emitting unit 32, a rod lens array 34, a sensing unit 36, and a light transmitting member 38. Above the seat body 30 is a transparent glass member 40, and the object 4 is placed above the transparent glass member 40.

The seat body 30 includes a first accommodating groove 300, a through groove 302 substantially parallel to the accommodating groove 300, and a second accommodating groove 304. The opening direction of the second accommodating groove 304 is substantially perpendicular to the The first receiving groove 300 is in the opening direction, and the second receiving groove 304 is connected to the through groove 302. The through groove 302 extends through the base 30. The body 30 can be fabricated by injection molding techniques, for example, using plastic or other resin materials.

The light emitting unit 32 is disposed in the first receiving groove 300 and emits light toward the object 4 . The light emitting unit 32 includes at least one light emitting element 320 and a light guiding element 322. The light emitting element 320 can be, for example, a light emitting diode (LED) or a small light bulb. The light emitting element 320 is disposed on At least one side of the light guiding element 322 emits light toward the light guiding element 322. The light guiding element 322 is configured to guide light incident thereon to generate a linear light source. In actual implementation, the light emitting unit 32 can be a light bar or a light tube.

The lenticular lens array 34 is disposed in the through groove 302. The lenticular lens array 34 has a plurality of cylindrical lenses 340, each of which has an imaging function.

The sensing unit 36 is disposed in the second receiving slot 304. The sensing unit 36 includes a circuit board 360 and a plurality of sensing elements 362, which may be, for example but not limited to, a printed circuit board (PCB). The sensing elements 362 are disposed on the circuit board 360 parallel to an axis A and are electrically connected to the circuit board 360. Each of the sensing elements 362 has an optical axis I that is parallel to the object 4. Each of the sensing elements 362 can be a charge coupled device (CCD), a complementary metal oxide semiconductor (CMOS) or other component having photoelectric conversion characteristics, and preferably the sensing element 362 can be a high resolution light coupling component. .

The light transmissive element 38 is disposed in the through slot 302 and is located below the lenticular lens array 34 . The sensing elements 362 face the light transmissive element 38 . The lens element 38 can be made of, for example, a light transmissive resin such as polymethyl methacrylate (PMMA) or polycarbonate (PC). The light-transmitting member 38 includes a body 380. The body 380 includes a groove portion 382, a total reflection surface 384, and a light-incident surface 386. The light-incident surface 386 is a bottom surface of the groove portion 382. The groove portion 382 is configured to receive the lenticular lens array 34 therein, and a bottom surface 342 of the lenticular lens array 34 abuts the light incident surface 386, in this way, light can be reduced to reflect at the junction of the lenticular lens array 34 and the groove portion 382, thereby increasing the chance of light being transmitted to the light transmissive element 38. The total reflection surface 384 is configured to reflect the image light L reflected by the object 4 and passing through the lenticular lens array 34 to form the image light L on the sensing elements 362.

4 is a cross-sectional view of a contact image sensing device according to a second embodiment of the present invention. The contact image sensing device 3a shown in the fourth figure is similar to the contact image sensing device 3 of the first embodiment, and the same elements are denoted by the same reference numerals. It is worth noting that the difference between the two is that the seat body 30a and the light transmitting member 38a are integrally formed as shown in the fifth figure.

The base body 30a and the light transmissive element 38a can be fabricated by two-color injection (or double-ejection) molding technology, so that the assembly procedure of the contact image sensing device 3a can be reduced, and the device can be greatly improved. The strength of the seat body 30a is used to improve the reliability of the contact image sensing device 3a. Wherein, when the transfer temperature of the resin material for fabricating the light transmissive element 38a is lower than the transfer temperature of the resin material for the base body 30a, the seat body 30a can be first formed by an injection molding technique, and then the light transmissive element 38a is made. Formed in the seat body 30a. On the other hand, when the transfer temperature of the resin material for fabricating the light-transmitting member 38a is higher than the transfer temperature of the resin material for forming the base member 30a, the light-transmitting member 38a can be first formed by an injection molding technique, and then the seat member 30a can be made. Formed on the light transmissive element 38a.

The base 30a includes a first accommodating groove 300a, a through groove 302a substantially parallel to the first accommodating groove 300a, and a second accommodating groove 304a communicating with the through groove 302a. The second accommodating groove 304a The direction of the opening is substantially perpendicular to the first The opening direction of the receiving groove 300a.

The lens element 38a is disposed in the through slot 302a and the second receiving slot 304a. The lens element 38a includes a body 380a having a total reflection surface 384a and a light incident surface 386a.

Referring to the fourth figure, the lenticular lens array 34 is disposed in the through slot 302a, and a bottom surface 342 of the lenticular lens array 34 abuts against the light incident surface 386a. The light emitting unit 32 is disposed in the first receiving groove 300a and emits light toward the object 4. The sensing unit 36 is disposed on the second accommodating groove 304a. The circuit board 360 of the sensing unit 36 seals the opening of the second accommodating groove 304a. The sensing elements 362 face the transparent component 38a. .

The light emitting unit 32 emits light toward the object 4, and the object 4 reflects the light emitted by the light emitting unit 32 to generate an image light L, which is transmitted through the lenticular lens array 34 and the light incident surface 386a. To the total reflection surface 384a, the total reflection surface 384a reflects the image light L, so that the image light L is imaged on the sensing elements 362.

6 is a cross-sectional view of a contact image sensing device according to a third embodiment of the present invention. The contact image sensing device 5 is configured to sense an image of an object 4 disposed thereon and convert the image of the object 4 into analog or digital image data. The contact image sensing device 5 includes a body 50, a light emitting unit 52, a cylindrical lens array 54, a sensing unit 56, and a light transmitting member 58. A transparent glass member 40 is disposed above the base 50, and the object 4 is placed above the transparent glass member 40.

The illuminating unit 52, the lenticular lens array 54, the sensing unit 56 and the light transmissive element 58 are respectively disposed on the base 50, and the lenticular lens array 54 Located between the light emitting unit 52 and the sensing unit 56, the light transmitting element 58 is located between the light emitting unit 52 and the lenticular lens array 54. The base 50 and the light transmissive element 58 may be separately disposed, or the base 50 and the light transmissive element 58 may be integrally formed and fabricated using a two-color injection molding technique. When the base 50 and the light transmissive element 58 are integrally formed, the assembly procedure of the contact image sensing device 5 can be reduced, and the strength of the base 50 can be greatly improved, thereby improving the contact image sensing. The reliability of the device 5.

The light-emitting unit 52 emits light toward the object 4, and the object 4 reflects the light emitted by the light-emitting unit 52 to generate an image light L, which is transmitted to the light-transmitting element 58.

The light-transmitting element 58 includes a body 580. In the embodiment, the body 580 is substantially rectangular, and is not limited thereto. The body 580 has a total reflection surface 582 that is adjacent to a surface of the body 50. The total reflection surface 582 reflects the image light L, thereby turning the optical transmission path of the image light L, so that the image light L is transmitted to the columnar array lens 54.

The lenticular lens array 54 is configured to focus the image light L on the sensing unit 56. The sensing unit 56 faces the light emitting side 520 of the light emitting unit 52. The light emitting side 520 has a light emitting surface 522, and the light emitting unit 52 emits light from the light emitting surface 522. The sensing unit 56 includes a circuit board 560 and a plurality of sensing elements 562 disposed on the circuit board 560. Each of the sensing elements 562 has an optical axis I that is parallel to the object 4. The sensing elements 562 face the lenticular lens array 54, the column The lens array 54 is such that the image light L is imaged by the sensing elements 562.

Referring to the seventh figure, a cross-sectional view of a contact image sensing device according to a fourth embodiment of the present invention is shown. The contact image sensing device 6 is configured to sense an image of an object 4 disposed thereon and convert the image of the object 4 into analog or digital image data. The contact image sensing device 6 includes a body 60, a light emitting unit 62, a cylindrical lens array 64, a sensing unit 66, and a light transmitting member 68. A transparent glass 40 is disposed above the base 60, and the object 4 is placed above the transparent glass member 40. The illuminating unit 62, the lenticular lens array 64, the sensing unit 66 and the light transmissive element 68 are respectively disposed on the base 60. The lenticular lens array 64 is located at the transparent component 68 and the sensing unit 66. between. The base 60 and the light transmissive element 68 may be separately disposed, or the base 60 and the light transmissive element 68 may be integrally formed and fabricated using a two-color injection molding technique. When the base 60 and the light transmissive element 68 are integrally formed, the assembly procedure of the contact image sensing device 6 can be reduced, and the strength of the base 60 can be greatly improved, thereby improving the contact image sensing. The reliability of the device 6.

The light-emitting unit 620 has a light-emitting side 620, and the light-emitting side 620 has a light-emitting surface 622. The light-emitting unit 62 emits light from the light-emitting surface 622. The light-emitting unit 62 is configured to emit light toward the object 4, and the object 4 reflects the light emitted by the light-emitting unit 62 to generate an image light L, which is transmitted to the light-transmitting element 68.

The light transmissive element 68 includes a body 680. In the embodiment, the body 680 is substantially pentagonal, and the body 680 faces the object 4 The face (ie, the surface for receiving the image light L) is a plane. The body 680 has a total reflection surface 682 that is adjacent to a surface of the body 60. The total reflection surface 682 reflects the image light L, thereby turning the optical transmission path of the image light L, so that the image light L is transmitted to the columnar array lens 64.

The lenticular lens array 64 is configured to focus the image light L on the sensing unit 66. The sensing unit 66 is opposite the light emitting side 620. The sensing unit 66 includes a circuit board 660 and a plurality of sensing elements 662 disposed on the circuit board 660. Each of the sensing elements 662 has an optical axis I that is parallel to the object 4. The sensing elements 662 are facing the lenticular lens array 64, and the lenticular lens array 64 is such that the image light L is imaged by the sensing elements 662.

Referring to FIG. 8, a cross-sectional view of a contact image sensing device according to a fifth embodiment of the present invention is shown. The contact image sensing device 7 is configured to sense an image of an object 4 disposed thereon and convert the image of the object 4 into analog or digital image data. The contact image sensing device 7 includes a body 70, a light emitting unit 72, a cylindrical lens array 74, a sensing unit 76, a light transmitting member 78, and a total reflecting member 79. A transparent glass 40 is disposed above the base 70, and a transparent glass member 40 is disposed above the base 70. The object 4 is placed above the transparent glass member 40.

The illuminating unit 72, the lenticular lens array 74, the sensing unit 76, the light transmissive element 78 and the total reflection member 79 are respectively disposed on the base 70, and the lenticular lens array 74 is located at the illuminating unit 72 and The light transmitting element 78 is located between the sensing unit 76 and the illuminating unit 72 and the lenticular lens array 74. The total reflection member 79 is located between the lenticular lens array 74 and the sensing unit 76. The seat body 70, the light transmissive element 78, and the total reflection member 79 may be separately disposed, or the seat body 70, the light transmissive element 78, and the total reflection member 79 may be integrally formed and output using two colors. Made by molding technology. When the base body 70 and the light transmissive element 78 are integrally formed, the assembly procedure of the contact image sensing device 7 can be reduced, and the strength of the base body 70 can be greatly improved, thereby improving the contact image sensing. The reliability of the device 7.

The light-emitting unit 72 is configured to emit light toward the object 4, and the object 4 reflects the light emitted by the light-emitting unit 72 to generate an image light L, which is transmitted to the light-transmitting element 78.

The sensing unit 76 includes a circuit board 760 and a plurality of sensing elements 762 disposed on the circuit board 760. Each of the sensing elements 762 has an optical axis I that is perpendicular to the object 4. The sensing elements 762 are facing the total reflection member 79.

The light transmissive element 78 includes a body 780. In the present embodiment, the body 780 is substantially rectangular. The body 780 has a total reflection surface 782 that is adjacent to a surface of the body 70. The total reflection surface 782 reflects the image light L, thereby turning the optical transmission path of the image light L, so that the image light L is transmitted to the columnar array lens 74.

The lenticular lens array 74 has an imaging function for imaging the image light L to the sensing unit 76. The total reflection member 79 includes a light transmitting body 790. In the embodiment, the light transmitting body 790 is substantially triangular. The The light-transmissive body 790 has a total reflection surface 792 that reflects the image light L passing through the lenticular lens array 74, thereby turning the optical transmission path of the image light L to image the image light L. The sensing elements 762.

However, the above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the equivalent changes and modifications made by the scope of the present invention should still be covered by the patent of the present invention. The scope of the scope is intended to protect.

1‧‧‧Contact Image Sensor

10, 30, 30a, 50, 60, 70‧‧‧

100‧‧‧ accommodating slots

102, 302, 302a‧‧‧ slotted

12‧‧‧Lighting elements

14‧‧‧ lenticular lens group

16, 36, 56, 56, 66, 76‧‧‧ Sensing unit

160, 360, 560, 660, 760‧‧‧ circuit boards

162‧‧‧Photosensitive elements

18‧‧‧Mirror

20‧‧‧Transparent parts

22, 4 ‧ ‧ objects

3, 3a, 5, 6‧‧‧ contact image sensing device

300, 300a‧‧‧first accommodating slot

304, 304a‧‧‧Second accommodating slot

32, 52, 62, 72‧ ‧ lighting units

320‧‧‧Lighting elements

322‧‧‧Light guiding elements

34, 54, 64, 74‧‧ ‧ lenticular lens array

340‧‧‧ lenticular lens

342‧‧‧ bottom surface

362, 562, 662, 762‧‧‧ sensing components

38, 38a, 58, 68, 78‧‧‧ Light-transmitting components

380, 380a, 580, 680, 780‧‧‧ ontology

382‧‧‧ Groove

384, 384a, 582, 682, 782, 792‧‧ ‧ total reflection surface

386, 386a‧‧‧ into the glossy

40‧‧‧Transparent glass pieces

520, 620‧‧‧ illuminating side

522, 622‧‧‧ light surface

79‧‧‧ total reflection parts

790‧‧‧Lighting body

A‧‧‧ axis

I‧‧‧ optical axis

L‧‧‧Image light

The first figure is a cross-sectional view of a conventional image sensing device.

The second figure is a perspective view of the contact image sensing device according to the first embodiment of the present invention.

The third figure is a cross-sectional view of the contact image sensing device of the first embodiment of the present invention.

The fourth figure is a cross-sectional view of a contact image sensing device according to a second embodiment of the present invention.

Figure 5 is a cross-sectional view showing a seat body and a light transmitting member according to a second embodiment of the present invention.

Figure 6 is a cross-sectional view showing a contact image sensing device according to a third embodiment of the present invention.

Figure 7 is a cross-sectional view showing a contact image sensing device according to a fourth embodiment of the present invention.

Figure 8 is a cross-sectional view showing a contact image sensing device according to a fifth embodiment of the present invention.

3‧‧‧Contact image sensing device

30‧‧‧ body

300‧‧‧First accommodating slot

302‧‧‧through slot

32‧‧‧Lighting unit

320‧‧‧Lighting elements

322‧‧‧Light guiding elements

34‧‧‧ lenticular lens array

340‧‧‧ lenticular lens

36‧‧‧Sensor unit

360‧‧‧PCB

362‧‧‧Sensor components

38‧‧‧Lighting components

380‧‧‧ Ontology

384‧‧‧ total reflection surface

386‧‧‧Into the glossy

A‧‧‧ axis

Claims (15)

A contact image sensing device for sensing an image of an object, the contact image sensing device comprising: a body comprising a first receiving groove and a substantially parallel one of the first receiving grooves a slot, and a second accommodating slot that communicates with the slot, the opening direction of the second accommodating slot is perpendicular to the opening direction of the first accommodating slot; and an illuminating unit is disposed in the first accommodating slot And emitting light to the object; a cylindrical lens array disposed in the through slot; a light transmissive element comprising a body, the body having a total reflection surface, the light transmissive element being disposed in the through slot and located The sensing unit is disposed in the second receiving groove, and the sensing unit includes a plurality of sensing elements facing the light transmitting element, and each sensing The element has an optical axis parallel to the object, wherein one of the image light rays reflected by the object is transmitted to the total reflection surface through the lenticular lens array, and the total reflection surface reflects the image light The image light is imaged in the sensing Pieces. The contact image sensing device of claim 1, wherein the light transmissive element further comprises a groove portion for receiving the lenticular lens array therein. The contact image sensing device of claim 2, wherein the light transmissive element further comprises a light incident surface, and the lenticular lens array is received in the groove portion to make the lenticular lens array One of the bottom surfaces abuts The entrance surface. The contact image sensing device of claim 1, wherein the body and the light transmissive element are integrally formed. The contact image sensing device of claim 4, wherein the body and the light transmissive element are made using a two-color shot. The contact image sensing device of claim 4, wherein the light transmitting component is disposed in the through slot and the second receiving slot. A touch image sensing device for sensing an image of an object, the touch image sensing device comprising: a light emitting unit directly emitting light toward the object; and a sensing unit comprising a plurality of sensing elements; The light transmissive element comprises a body having a total reflection surface; and a cylindrical lens array disposed between the light transmissive element and the sensing unit; wherein the image light is transmitted to the image through the object In the light transmissive element, the total reflection surface reflects the image light, and the image light is imaged on the sensing elements through the lenticular lens array. The touch-sensitive image sensing device of claim 7, further comprising a body, the light-emitting unit, the sensing unit, the columnar array lens and the light-transmitting element are respectively disposed on the base. The contact image sensing device of claim 8, wherein the body and the light transmissive element are integrally formed. Contact image sensing device as described in claim 8 The holder and the light transmissive element are made using two-color ejection. The contact image sensing device of claim 7, wherein each of the photosensitive elements has an optical axis that is perpendicular to the object. The contact image sensing device of claim 11, further comprising a total reflection member disposed between the lenticular lens array and the sensing unit, the total reflection member being reflected The image light of the lenticular lens array images the image light onto the sensing elements. The contact image sensing device of claim 7, wherein each of the sensing elements has an optical axis that is parallel to the object. The contact image sensing device of claim 13, wherein the sensing unit faces a light emitting side of the light emitting unit. The contact image sensing device of claim 13, wherein the sensing unit is opposite to a light emitting side of the light emitting unit.