TWM598977U - Image capture apparatus and electronic device thereof - Google Patents

Abstract

An image capturing apparatus includes a substrate electrically connected to at least one light source and a imager and a sensor; and a cover plate disposed on a light source of the light source, wherein a surface of the cover plate is provided with a plurality of blocking layer which having a light transmissive region between two adjacent blocking layers.

Description

Image capturing device and its electronic device

This creation relates to a photoelectric module and its electronic device, in particular to an image capturing device and its electronic device.

The types of biometric recognition include face, voice, iris, retina, vein, palm print and fingerprint recognition. According to different sensing methods, biometric identification devices can be divided into optical, capacitive, ultrasonic and thermal induction types. Generally speaking, an optical biometric identification device includes a light source, a light guide element, and a sensor. The light beam emitted by the light source irradiates the object to be measured (such as fingers, palm prints, etc.) pressed on the light guide element, and the sensor receives the light beam reflected by the object to identify the biological characteristics.

Taking fingerprint recognition as an example, when a finger presses on the light guide element, the convex part of the fingerprint will contact the light guide element, and the concave part of the fingerprint will not contact the light guide element. Therefore, the convex part of the fingerprint destroys the total reflection of the light beam in the light guide element, and the sensor obtains the dark pattern corresponding to the convex part. At the same time, the concave part of the fingerprint does not destroy the total reflection of the light beam in the light guide element, and the sensor obtains the bright pattern corresponding to the concave part. Thereby, the light beams corresponding to the convex and concave portions of the fingerprint will form a bright and dark striped pattern on the light receiving surface of the sensor. Using an algorithm to calculate the information corresponding to the fingerprint image, the user's identity can be identified. However, the existing optical fingerprint recognition still has many problems that need to be overcome. For example, the disadvantageous development problems such as low beam transmittance, easy deviation of recognition ability, and high production cost, which are urgently needed by those with ordinary knowledge in the field. Subject.

This creation mainly provides an imaging device with good performance and low manufacturing cost.

The present invention mainly discloses an image capturing device, which includes: a substrate electrically connected to at least one light source and an image capturing device; and a cover plate, the cover plate is arranged on a light source of the light source, and the cover plate A plurality of shielding layers are arranged on one surface, and a light-transmitting area is provided between two adjacent shielding layers.

In an embodiment of the present invention, the light-transmitting area is not covered by the shielding layer.

In an embodiment of the present invention, the light-transmitting area is a biological feature imaging area.

In an embodiment of the present invention, the cover plate further includes: a first surface, the first surface being away from the substrate; a second surface, disposed on the opposite side of the first surface; and A third surface connecting the first surface and the second surface.

In an embodiment of the present invention, the light source is adapted to emit a light beam, and the light beam enters the light-transmitting area through the second surface.

In an embodiment of the present invention, a microlens array is provided on the light-transmitting area of the second surface.

In an embodiment of the present invention, the imager is arranged in the light-transmitting area.

In an embodiment of the present invention, the light source is obliquely disposed on the substrate at an angle between 30 degrees and 75 degrees.

In an embodiment of the present invention, the light source includes one or more visible light sources and/or invisible light sources.

In an embodiment of the present invention, the cover plate further includes: a first surface, the first surface being away from the substrate; a second surface, disposed on the opposite side of the first surface; and A third surface connecting the first surface and the second surface; and the image capturing device further includes: a light guide element disposed between the cover plate and the substrate, wherein the light guide element is located on the first surface Below the second surface.

In an embodiment of the present invention, the light guide element has an upper surface, a lower surface opposite to the upper surface, and a connecting surface for connecting the upper surface and the lower surface.

In an embodiment of the present invention, the light guide element covers the light transmission area.

In an embodiment of the present invention, the light guide element covers the light transmission area and the shielding layer.

In an embodiment of the present invention, the connecting surface is connected to the upper surface and/or the lower surface at an oblique angle.

In an embodiment of the present invention, the connecting surface is connected to the upper surface and/or the lower surface at an oblique angle.

In an embodiment of the present invention, the light guide element is a quadrangular ridge.

In an embodiment of the present invention, the substrate further includes: a first substrate for carrying the at least one light source; a second substrate for carrying the imager, wherein the first substrate and the sill One oblique side of the second substrate is arranged parallel to each other, and the other oblique side of the second substrate is arranged parallel to each other.

In an embodiment of the present invention, a display panel layer is disposed on the transparent area of the cover plate, and the display panel has a plurality of touch electrodes.

In an embodiment of the present invention, the shielding layer is an ink or a black matrix layer.

This creation additionally discloses an electronic device, including: an image processing unit, including the above-mentioned image capturing device.

In this creation, at least one light source and one imager are electrically connected by a substrate; and a cover plate is arranged on a light emitting side of the light source, and a surface of the cover plate is provided with a plurality of shielding layers, of which two adjacent shielding layers There is a light-transmitting area in between. When the light source emits a light beam, the finger is reflected to the light-transmitting area, so that the imager can obtain better image quality, and the overall structure is simpler and easy to produce.

In order to further understand the features and technical content of this creation, please refer to the following detailed descriptions and drawings about this creation. However, the provided drawings are only for reference and explanation, not to limit this creation.

1000‧‧‧Electronic device

TS‧‧‧Upper surface

10‧‧‧Cover

CS‧‧‧Connecting surface

11‧‧‧Masking layer

SS‧‧‧Slope

12‧‧‧Transparent area

100‧‧‧Image capture device

13‧‧‧Micro lens array

200‧‧‧Image capture device

15‧‧‧Light guide element

300‧‧‧Image capture device

20‧‧‧Light source

400‧‧‧Image capture device

30‧‧‧Substrate

500‧‧‧Image capture device

30A‧‧‧First substrate

600‧‧‧Image capture device

30B‧‧‧Second substrate

700‧‧‧Image capture device

40‧‧‧Viewfinder

AG‧‧‧Air gap layer

S1‧‧‧First surface

BS‧‧‧lower surface

S2‧‧‧Second surface

SP‧‧‧Plane

S3‧‧‧The third surface

OBJ‧‧‧Object to be tested

Fig. 1 is a schematic diagram of the first embodiment of the new creation-capturing device.

Fig. 2 is a schematic diagram of a second embodiment of the new creation-capturing device.

Fig. 3 is a schematic diagram of the third embodiment of the new creation-capturing device.

Fig. 4 is a schematic diagram of a fourth embodiment of the new creation-capturing device.

Fig. 5 is a schematic diagram of a fifth embodiment of the new creation-capturing device.

Fig. 6 is a schematic diagram of the sixth embodiment of the new creation-capturing device.

Fig. 7 is a schematic diagram of a seventh embodiment of the new creation-capturing device.

Fig. 8 is a schematic diagram of an embodiment of an electronic device of the present invention.

The directional terms mentioned in the embodiments, such as "up", "down", "front", "rear", "left", "right", etc., are only directions with reference to the drawings. Therefore, the directional terms used are used to illustrate, but not to limit the present invention. In the drawings, each drawing depicts the general features of the methods, structures, and/or materials used in specific exemplary embodiments. However, these drawings should not be construed as defining or limiting the scope or nature covered by these exemplary embodiments. For example, for the sake of clarity, the relative size, thickness, and position of each layer, region, and/or structure may be reduced or enlarged.

In the embodiments, the same or similar elements will use the same or similar reference numerals, and the redundant description will be omitted. In addition, the features in different exemplary embodiments can be combined without conflict, and simple equivalent changes and modifications made in accordance with this specification or the scope of the patent application still fall within the scope of this patent. In addition, the terms "first" and "second" mentioned in this specification or the scope of the patent application are only used to name discrete elements or distinguish different embodiments or ranges, and are not used to limit the number of elements. The upper limit or lower limit is not used to limit the manufacturing sequence or the arrangement sequence of the components.

The image capturing device 100 is used in an environmental medium, where the environmental medium is, for example, air, water, or other types of environmental media. The aforementioned object OBJ to be tested is, for example, the user's finger, palm, wrist, or eyeball, and the imaging device 100 The captured images are, for example, fingerprints, palm prints, veins, pupils or iris, but this creation is not limited to this.

Please refer to FIG. 1. FIG. 1 shows an image capturing device 100. The image capturing device 100 includes a substrate 30 and a cover plate 10 corresponding to the substrate 30. The substrate 30 is electrically connected to at least one light source 20 and an image capture device 40. , The light emitting surface of the light source 20 faces the cover plate 10, and the cover plate 10 includes a first surface S1, a second surface S2 located on the other side of the first surface, and a third surface connected to the first surface and the second surface. The surface S3. In this embodiment, the first surface S1 is suitable for contacting an object OBJ to be tested, such as a finger or a palm, etc.... The present invention is not limited.

It can be seen from FIG. 1 that the second surface S2 has a plurality of shielding layers 11, and an opening is formed between two adjacent shielding layers 11 to define a light-transmitting area 12. It can be seen from this embodiment that the cover plate 10 is suitable for protecting the components located thereunder, and it can be a glass substrate or a plastic substrate. The glass substrate may be a chemically strengthened or physically strengthened glass substrate, or an unstrengthened glass substrate. The plastic substrate can be polycarbonate (PC), polyethylene terephthalate (PET), polymethylmethacrylate (PMMA) or polyimide (PI), etc. , But not limited to this.

Please continue to refer to FIG. 1. In this embodiment, the shielding layer 11 of the image capturing device 100 further includes an ink layer or a pattern layer or a black matrix layer (ie Black Matrix shielding layer 11) formed through a photomask process of a semiconductor process. , And form the shielding layer 11 and the light-transmitting area 12, and the shielding layers are formed on the second surface S2 of the cover plate 10. If the shielding layer 11 is made of ink, such as but not limited to black The translucent material. In other words, the shielding layer 11 can pass light beams of part of the wavelengths, while allowing light beams of another part of the wavelengths to be absorbed. That is, the transmittance of the shielding layer 11 can be selectively between 10% and 100%. In this embodiment, the shielding layer 11 can be formed on the second surface S2 of the Geban 10 by a process of coating, evaporation, etching and development, or laser, but the invention is not limited to this.

In any embodiment of the present invention, the light source 20 is suitable for providing a light beam illuminating the object to be measured. The light source 20 may include one or more light-emitting elements. The light-emitting element faces the object under test The OBJ emits a light beam. The light-emitting element may include a light-emitting diode, a laser diode, or a combination of the two. In addition, the light beam may include visible light, non-visible light, or a combination of both. The invisible light may be infrared light, but it is not limited to this. For example, if the light source 20 is selected from infrared light, the shielding layer 11 can make the transmittance of visible light (ambient light) between 0% and 10%, and make the transmittance of infrared light exceed 80%.

In addition, in any embodiment of the present creation, the light source 20 may be configured in a cavity formed by a housing (not shown in the figure), and the cavity is filled with diffusion particles (not shown in the figure) . The material of the diffusion particles referred to here is for example polystyrene, polymethacrylate, methyl methacrylate and styrene copolymer, polycarbonate, polyethylene, silicone resin, calcium carbonate, silicon dioxide, titanium dioxide or Is its combination. The diameter of the diffusion particles is, for example, between 0.01 μm and 30.0 μm, but the present invention is not limited to this.

Another feasible solution from this embodiment is to dispose a light diffusion sheet or a light diffusion film (not shown in the figure) above the light exit surface of the light source 20. The light diffusion sheet or light diffusion film may also be the above Made of materials and proportions. It should be noted here that if the light source 20 is a light-emitting diode, the outer shell of the light source 20 can also form a rough surface on the surface to make the light beam spread more uniformly.

From this embodiment, the object side (imaging position) of the imager 40 on the substrate 30 is located in the light-transmitting area of the cover plate 10, and the shielding layer does not cover the imaging position of the imager. The light source 20 is inserted into the substrate 30 at a predetermined angle, so that the light source 20 can emit a light beam at a specific angle. The light beam enters the light-transmitting area 12 through the second surface S2, and transmits the light beam to the test on the first surface S1 On the object OBJ (such as a fingerprint), the light beam signal with the object OBJ to be tested passes through the transparent area 12 and the second surface S2 again, so that the imagefinder 40 can receive the light beam signals with the object.

The imager 40 referred to in any embodiment of the present invention is adapted to receive the part of the light beam reflected by the object OBJ (for example, the light beam with fingerprint pattern information). The image taker 40 further includes a photosensitive element, and the photosensitive element may include a charge coupled device (CCD), a complementary metal-oxide semiconductor (Complementary Metal-Oxide Semiconductor, CMOS) or other appropriate types of image Sensing element. The image taker in this embodiment can use a fixed focus lens (transparent Lens), zoom lens (lens) or adjustable focus lens (lens), etc., and the imager 40 can be housed in a lens barrel (not shown), the lens barrel may include an adjustment mechanism to adjust the focus , The creation of this new model is not limited to the number of lenses (lenses) of the imager lens. In any feasible solution, the imager lens can be a lens (lens) with positive or negative refractive power (single or multiple). ) And/or aperture and other components (combined), and Chen Ming.

Please refer to FIG. 2. FIG. 2 is a first modified embodiment of FIG. 1. The same parts as FIG. 1 will not be repeated here. The difference between FIG. 2 and FIG. 1 lies in the light-transmitting area of the cover plate 10. A micro-lens array 13 (Micro-Lens array) is formed on the second surface S2 below 12. The micro-lens array 13 is composed of a plurality of hemispherical lenses arranged on the second surface S2, and the lenses can It is adhered to the second surface S2 through an adhesive material. From this embodiment, it can also be formed on the second surface S2 through an integral molding method. It should be noted that the microlens array 13 is disposed between the second surface S2 and the imager 40, and there is an air gap layer AG between the microlens array 13 and the imager. Among them, the microlens array 13 has a light-gathering characteristic, which can effectively increase the intensity of the light signal received by the image capture device 40, thereby helping to improve the recognition rate of the overall image capture device.

Please refer to FIG. 3, which is another embodiment of the present creation. FIG. 3 mainly shows an image capturing device 300. The image capturing device 300 includes a substrate 30 and a cover 10 corresponding to the substrate 30. The substrate 30 is electrically connected There are at least one light source 20 and an image taker 40. The light emitting surface of the light source 20 faces the cover plate 10, and the cover plate 10 includes a first surface S1, a second surface S2 on the other side of the first surface, and The third surface S3 connecting the first surface S1 and the second surface S2. In this embodiment, the first surface S1 is suitable for contacting an object OBJ to be tested, such as a finger or a palm, etc... The present invention is not limited.

It can be seen from FIG. 3 that the second surface S2 has a plurality of shielding layers 11, and an opening is formed between two adjacent shielding layers 11 to define a transparent area 12. It can be seen from this embodiment that the cover plate 10 is suitable for protecting the components located thereunder, and it can be a glass substrate or a plastic substrate. The glass substrate may be a chemically strengthened or physically strengthened glass substrate, or an unstrengthened glass substrate. The plastic substrate can be polycarbonate (PC), polyethylene terephthalate (polyethylene terephthalate) terephthalate (PET), polymethylmethacrylate (PMMA) or polyimide (PI), but not limited to this.

In this embodiment, the shielding layer 11 of the image capturing device 300 further includes an ink layer or a patterned layer (ie, shielding layer 11) formed through a photomask process of a semiconductor manufacturing process, and forming the shielding layer 11 and the light-transmitting layer. In area 12, the aforementioned shielding layers are formed on the second surface S2 of the cover plate 10. If the shielding layer 11 is selected from ink materials, such as but not limited to black semi-transparent materials. In other words, the shielding layer 11 can allow part of the light beam to pass through, while allowing another part of the light beam to be absorbed. That is, the transmittance of the shielding layer 11 can be selectively between 10% and 100%. In this embodiment, the shielding layer 11 can be formed on the second surface S2 of the cover plate 10 by a process of coating, evaporation, etching and development, or laser; in addition, the shielding layer can also use the same light through the color filter layer. The cover is made by stacking, but the creation of the new type is not limited to this.

Please continue to refer to FIG. 3, the second surface under the cover plate 10 is provided with a light guide element 15, and the light guide element 50 has an upper surface TS joined to the second surface S2, and a light guide element 50 is arranged on the opposite side of the upper surface TS. The lower surface BS, and a connecting surface CS respectively connecting the upper surface TS and the lower surface BS, it can be seen from the embodiment in FIG. 3 that the light guide element 15 covers the light-transmitting area 12 and is located Part of the shielding layer 11 on both sides of the light area.

It can be seen from FIG. 3 that the light source 20 is suitable for providing a light beam for illuminating the object to be measured. The light source 20 may include one or more light-emitting elements. The light emitting element emits a light beam toward the object under test OBJ. The light-emitting element may include a light-emitting diode, a laser diode, or a combination of the two. In addition, the light beam may include visible light, non-visible light, or a combination of both. The invisible light may be infrared light, but it is not limited to this. For example, after the light source 20 emits a light beam, the light beam enters the light guide element 15 and the connecting surface CS of the light guide element and then performs total reflection transmission in another direction (in this embodiment, the connecting surface is non-vertical and is an inclined When the light beam is transmitted to the light-transmitting area 12, the light beam will pass through the light-transmitting area and enter the cover plate 10, and irradiate an object (such as a finger) to obtain the peak and valley signals of the finger, and then the finger will be covered The signal beam is reflected to the light-transmitting area 12, and the imager 40 receives the part of the beam reflected by the object under test OBJ (for example: with fingerprint The beam of case information).

4 is a modified embodiment of FIG. 3, the difference is that the light source 20 is located on both sides of the imager 40, and the two connecting surfaces CS of the light guide element 15 are both inclined surfaces to facilitate the light beam transmission.

5 is another modified embodiment of FIG. 3. The light guide element 15 only covers the shielding layer 11 on the left, the light-transmitting area 12, and part of the shielding layer 11 on the right, and the light source 20 is only vertical It is arranged under the two shielding layers.

FIG. 6 shows another feasible embodiment of the present invention. The light guide element 15 of the image capturing device 600 is mainly a trapezoid, and the top surface TS of the light guide element and the second surface S2 Connected, the bottom surface BS relative to the top surface is a flat surface, and the connecting surface CS used to connect the top surface TS and the bottom surface BS is an inclined surface; in this embodiment, the image capturing device 600 further includes a first substrate 30A and the second substrate 30B. The first substrate 30A is electrically connected to at least one light source 20, the second substrate 30B is electrically connected to at least one imagefinder 40, and the first substrate 30A and the second substrate 30B are connected to their respective The connecting surfaces CS are arranged parallel to each other.

FIG. 7 is a modified embodiment of FIG. 6, the difference is that the light guide element 15 is an isosceles triangle or an equilateral triangle. In this embodiment, the light guide element 15 has a plane SP parallel to the second surface S2 and two slopes SS having the same length as the plane; wherein, the image capturing device 700 further includes a first substrate 30A and The second substrate 30B, the first substrate 30A is electrically connected to at least one light source 20, the second substrate 30B is electrically connected to at least one imagefinder 40, and the first substrate 30A and the second substrate 30B are respectively connected to the respective slope SS Set up parallel to each other.

FIG. 8 discloses an embodiment of an electronic device 1000 of the present invention. In this embodiment, the substrate 10 may include an image processing unit for processing the object image (such as fingerprint image) captured by the imager 40, And it is used to compare whether the fingerprint data stored in a memory matches the image, and if they match, unlock or open permissions, etc.

In addition, in any embodiment of the present invention, a display panel layer is provided on the transparent area 12 of the cover plate 10, and the display panel has a plurality of touch electrodes. When the cover 10 is a display panel, the light source 20 can be the display panel as a source of light beams, and this creation is not limited to the type of the display panel.

Although the creation of this new type has been disclosed in the above embodiments, it is not intended to limit the creation of this new type. Anyone with ordinary knowledge in the technical field can make some changes and changes without departing from the spirit and scope of the new creation. Retouching, so the scope of protection of the creation of this new model shall be subject to the scope of the attached patent application.

200‧‧‧Image capture device

30‧‧‧Substrate

10‧‧‧Cover

40‧‧‧Viewfinder

11‧‧‧Masking layer

S1‧‧‧First surface

12‧‧‧Transparent area

S2‧‧‧Second surface

13‧‧‧Micro lens array

S3‧‧‧The third surface

20‧‧‧Light source

AG‧‧‧Air gap layer

Claims (20)

An image capturing device includes: a substrate electrically connected to at least one light source and an image capture device; and a cover plate arranged on a light-emitting side of the light source, and a plurality of A shielding layer, in which there is a light-transmitting area between two adjacent shielding layers. The imaging device according to claim 1, wherein the light-transmitting area is not covered by the shielding layer. The imaging device according to claim 1, wherein the light-transmitting area is a biometric imaging area. The imaging device according to claim 1, wherein the cover plate further comprises: a first surface, the first surface being away from the substrate; a second surface, disposed on the opposite side of the first surface; and a Used to connect the first surface and the third surface of the second surface. The imaging device according to claim 4, wherein the light source is adapted to emit a light beam, and the light beam enters the light-transmitting area through the second surface. The imaging device according to claim 4, wherein a microlens array is provided on the light-transmitting area of the second surface. The image capturing device according to claim 1, wherein the image capturing device is arranged in the light transmission area. The imaging device according to claim 1, wherein the light source is obliquely disposed on the substrate at an angle between 30 degrees and 75 degrees. The imaging device according to claim 1, wherein the light source includes one or more visible light sources and/or invisible light sources, and the light source is a light source with diffuse particles. The imaging device according to claim 1, wherein the cover plate further comprises: a first surface, the first surface being away from the substrate; a second surface, arranged on the opposite side of the first surface; and a A third surface for connecting the first surface and the second surface; and the image capturing device further includes: a light guide element disposed between the cover and the substrate, wherein the light guide element is located at the Below the second surface. The imaging device according to claim 10, wherein the light guide element has an upper surface, a lower surface opposite to the upper surface, and a connecting surface for connecting the upper surface and the lower surface. The imaging device according to claim 11, wherein the light guide element covers the light transmission area. The imaging device according to claim 10, wherein the light guide element covers the light-transmitting area and the shielding layer. The imaging device according to claim 12, wherein the connecting surface is connected to the upper surface and/or the lower surface at an oblique angle. The imaging device according to claim 14, wherein the connecting surface is connected to the upper surface and/or the lower surface at an oblique angle. The imaging device according to claim 10, wherein the light guide element is a four-corner Shape 稜鏡. The imaging device according to claim 16, wherein the substrate further includes: A first substrate for carrying the at least one light source; A second substrate for supporting the imager, wherein the first substrate and one oblique side of the ridge are arranged in parallel to each other, and the other oblique side of the second substrate is arranged in parallel to each other. The imaging device according to claim 1, wherein a display panel layer is arranged on the light-transmitting area of the cover plate, and the display panel has a plurality of touch electrodes. The imaging device according to any one of claims 1 to 18, wherein the shielding layer is an ink or a black matrix layer. An electronic device, including: An image processing unit, and the imaging device according to any one of Claims 1 to 18.

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