CN214751918U

CN214751918U - Image capturing device

Info

Publication number: CN214751918U
Application number: CN202120550680.XU
Authority: CN
Inventors: 林浩翔; 巫仁杰
Original assignee: Gingy Technology Inc
Current assignee: Gingy Technology Inc
Priority date: 2020-11-05
Filing date: 2021-03-17
Publication date: 2021-11-16
Anticipated expiration: 2031-03-17
Also published as: TWM619779U; CN114529954A; TW202219829A

Abstract

The utility model provides a get for instance device, it includes the printing opacity base plate, set up in light source under the printing opacity base plate, be located the light-absorbing layer on printing opacity base plate surface, set up in sensitization unit under the printing opacity base plate, set up in laminating layer under the printing opacity base plate and set up in panel module under laminating layer, wherein the light source is used for the transmission beam, just the light beam passes through laminating layer and throw extremely the printing opacity base plate.

Description

Image capturing device

Technical Field

The present invention relates to an image capturing device for capturing a biological feature image, and more particularly to an optical image capturing device capable of being disposed in a display panel.

Background

The fingerprint identification device is divided into a capacitive type fingerprint identification device and an optical type fingerprint identification device, wherein the capacitive type fingerprint identification device mainly records fingerprint characteristics through capacitance changes of a plurality of touch points, and the optical type fingerprint identification device directly acquires fingerprint images to record the fingerprint characteristics. The capacitive fingerprint identification device is susceptible to moisture or other electronic noise, resulting in a misjudgment problem. Furthermore, if an electronic device (such as a smart phone or a tablet) using the capacitive fingerprint recognition device is attached with a protection sticker or toughened glass, the capacitive fingerprint recognition device may not recognize the fingerprint.

Although the optical fingerprint identification device can solve the technical problem that the fingerprint cannot be identified due to the fact that a protective sticker or toughened glass is attached, the image capturing device in the existing optical fingerprint identification device is still too large in area, and the attractiveness and the visual field of a screen are affected when the device is applied to a handheld device. In addition, for the miniaturization of electronic devices, the image capturing device must be miniaturized (i.e. the size of the image capturing device needs to be smaller and the thickness of the image capturing device needs to be thinner), however, even if the image capturing device is thinner, the thickness of the image capturing device is still increased after the image capturing device is attached to the display device.

SUMMERY OF THE UTILITY MODEL

At least one of them based on aforementioned purpose, the utility model provides an get for instance device, it includes the printing opacity base plate, is located the light-absorbing layer on printing opacity base plate surface, set up in the light source under the printing opacity base plate, set up in sensitization unit under the printing opacity base plate, set up in laminating layer under the printing opacity base plate and set up in panel module under the laminating layer, wherein the light source is used for the transmission beam, just the light beam passes through laminating layer and throw extremely the printing opacity base plate. The finger to be identified is placed on the light-transmitting substrate, and the light beam is received by the photosensitive unit after being reflected.

According to the utility model discloses an embodiment, the printing opacity base plate divide into display area, interior frame region and outline region. The laminating layer is provided with a first surface and a second surface opposite to the first surface; the first surface of the laminating layer is laminated with the display area and the inner frame area of the light-transmitting substrate, and the second surface of the laminating layer is laminated with the panel module; the inner frame region of the light-transmitting substrate covers the edge of the bonding layer, and the light source is arranged below the outer frame region and outside the bonding layer.

According to the utility model discloses an embodiment, the refracting index of laminating layer is less than the refracting index of printing opacity base plate. The incident angle of the light beam entering the transparent substrate can be adjusted by changing the refractive index of the adhesive layer, and total reflection can be generated to realize comprehensive screen fingerprint identification.

According to the utility model discloses an embodiment, printing opacity base plate thickness is greater than laminating layer thickness has the mechanical strength protection panel module of preferred.

Drawings

Fig. 1 is a schematic top view of an image capturing device.

Fig. 2A and fig. 2B are schematic top and cross-sectional views of an image capturing apparatus according to an embodiment of the invention.

Fig. 3 is a schematic view of an image capturing device according to an embodiment of the present invention.

Fig. 4 is a schematic view of an image capturing device according to an embodiment of the present invention.

Fig. 5 is a schematic view of an image capturing device according to an embodiment of the present invention.

Fig. 6 is a schematic view of an image capturing device according to an embodiment of the present invention.

Fig. 7A and 7B are schematic top and cross-sectional views of an image capturing device according to an embodiment of the present invention.

Fig. 8 is a schematic top view of an image capturing device according to an embodiment of the present invention.

Description of reference numerals: 10. 20, 30, 40, 50, 60, 70, 80-image taking device; 110. 210-a display area; 120-a border area; 200-a light-transmissive substrate; 221-inner border area; 222-an outer frame area; 230-a first light absorbing layer; 231-a second light absorbing layer; 232-a third light absorbing layer; 240-a lamination layer; 241-a first surface; 242 — a second surface; 250. 750, 850 — first light source; 260. 360, 560-panel module; 270. 370, 770-photosensitive unit; 561-a first light transmissive part; 562-a second light-transmitting member; 563-backlight module; 680-flexible printed circuit board; 851-a second light source; 852-a third light source; f-finger.

Detailed Description

For a fuller understanding of the nature, character and function of the present invention, reference should be made to the following detailed description taken together with the accompanying figures.

First, referring to fig. 1, a top view of an image capturing device 10 is illustrated, which is divided into a display area 110 and a frame area 120. In this embodiment, the image capturing device 10 may be a mobile phone, and the larger the area ratio of the display area 110 to the front surface of the mobile phone, the larger the screen view of the mobile phone. Therefore, with the drive of full-Screen mobile phones, the high Screen ratio (Screen ratio) becomes a Screen display technology that many manufacturers make a breakthrough. The screen occupation ratio is the ratio of the displayable area of the mobile phone screen to the area of the whole mobile phone front, that is, the screen occupation ratio is the display area 110/(the display area 110+ the frame area 120). In the technology of fingerprint identification in the screen (FID), some technologies need to place an optical component below the border region 120, increase the width of the border region, and cause the screen to occupy less area, which does not conform to the narrow border trend. To solve this problem, the present invention provides a technical solution to realize a very narrow frame, close to a full-screen mobile phone without a frame.

Fig. 2A and fig. 2B are schematic top and cross-sectional views of an image capturing device 20. In this embodiment, the image capturing device 20 includes: a transparent substrate 200 divided into a display region 210, an inner frame region 221, and an outer frame region 222; a first light absorption layer 230 located in the inner frame region 221 and the outer frame region 222 of the transparent substrate 200; a first light source 250 disposed under the light-transmitting substrate 200; a photosensitive unit 270 disposed under the transparent substrate 200; a bonding layer 240 disposed below the light-transmitting substrate 200 and having a first surface 241 and a second surface 242 opposite to the first surface; a panel module 260 disposed under the laminating layer 240; wherein the first surface 241 of the adhesive layer 240 is attached to the inner frame region 221 and the display region 210 of the transparent substrate 200, and the second surface 242 is attached to the panel module 260; the inner frame region 221 of the light-transmitting substrate 200 covers the edge of the adhesive layer 240; and the first light source 250 is configured to emit a light beam, which is projected to the light-transmitting substrate 200 through the adhesive layer 240, so that the light beam reflected by an object (for example, a finger, but not limited thereto) on the image capturing device 20 is absorbed by the light-sensing unit 270, thereby completing Biometric Identification (Biometric Identification).

Basically, the display region 210 of the light-transmitting substrate 200 may function as a sensing region. The outer frame region 222 of the transparent substrate 200 is located at the outermost edge, and the inner frame region 221 connects the outer frame region 222 and the display region 210.

In this embodiment, the incident beam angle can be adjusted by changing the widths of the inner frame region 221 and the outer frame region 222, and the stray light can be shielded. And the inner frame region 221 covers the edge of the lamination layer 240 to avoid affecting the display.

In one embodiment, the first light absorbing layer 230 may be a light absorbing material such as a Black Matrix (Black Matrix). Therefore, by using the first light source 250 in combination with the light path design of the transparent substrate 200, the first light absorbing layer 230 and the adhesive layer 240, the light channel shown in fig. 2B can be formed, so that the light beam can be focused on the specific light channel, and projected to the transparent substrate 200 through the adhesive layer 240, so that the light can efficiently irradiate on the object to be sensed, and is transmitted to the light sensing unit 270 through reflection to form the biological feature image.

In this embodiment, no additional optical component is needed to adjust the optical path, thereby saving the mechanism space and meeting the trend of narrow frame. The light sensing unit 270 is disposed in the panel module 260, and a multi-layer Collimator (collimater) design is not required, so that the display quality is not affected by the reduction of the aperture ratio of the display panel due to low cost.

In an embodiment, the refractive index of the light-transmitting substrate 200 is greater than the refractive index of the adhesive layer 240. When the ratio (n1/n2) of the refractive index n1 of the adhesive layer 240 to the refractive index n2 of the transparent substrate 200 is 0.886 to 0.995, the detection rate data can reach the identification level. The preferred ratio of n1/n2 is 0.900-0.995.

In an embodiment, the thickness of the transparent substrate 200 is greater than the thickness of the adhesive layer 240, so that the panel module can have better mechanical strength. In one embodiment, the transparent substrate 200 may be a transparent surface Cover plate such as a Glass Cover plate (Cover Glass). In a preferred embodiment, the thickness of the transparent substrate 200 is between 100um to 10mm, which has a better protection effect. In an embodiment, the Adhesive layer 240 may be a light-transmitting material such as an optical Clear Adhesive (optical Adhesive). In another embodiment, the thickness of the lamination layer 240 is between 10um and 1mm, and there is less optical loss.

In addition, the photosensitive unit 270 of the present embodiment is disposed in the panel module 260, but the invention is not limited thereto. The photosensitive unit can be arranged in the panel module or arranged outside the panel module.

Referring to fig. 3, in the image capturing apparatus 30 of the present embodiment, the photosensitive unit 370 is disposed outside the panel module 360. In one embodiment, the photosensitive unit 370 may be any photosensitive imaging Module such as a Collimator (Collimator) photosensitive Module, a Lens Module, a Complementary Metal Oxide Semiconductor (CMOS) photosensitive Module, or a photo sensor (photo diode). In one embodiment, the panel module 360 may be a display panel such as a liquid crystal panel (LCD), an active matrix organic light emitting panel (AMOLED), a passive matrix organic light emitting Panel (PMOLED), a Mini light emitting diode panel (Mini LED), a Micro light emitting diode panel (Micro LED), and the like. In one embodiment, the wavelength of the first light source 250 is different from the wavelength of the light emitted by the panel module 360.

Referring to fig. 4, in the image capturing apparatus 40 of the present embodiment, a second light absorbing layer 231 is further included at a side of the panel module 260 at the same side as the first light source 250. The second light-absorbing layer 231, such as a Black Matrix (Black Matrix), is coated on the side of the panel module 260 to absorb the stray light, so as to prevent the stray light from entering the light-sensing unit 270 and affecting the image recognition.

Referring to fig. 5, in the image capturing apparatus 50 of the present embodiment, the panel module 560 includes: a first Light-transmitting member 561, a second Light-transmitting member 562, and a backlight module 563(BLU, Back Light Unit). In one embodiment, the first light-transmitting member 561 includes: polarizers (POL), and Color Filters (CF). In one embodiment, the second light-transmitting member 562 includes: a Thin Film Transistor liquid crystal (TFT) and a Polarizer (POL).

Referring to fig. 6, the image capturing apparatus 60 of the present embodiment further includes a flexible printed circuit board 680. When the Flexible Printed Circuit (FPC) 680 has wrapped the second light-transmitting member 562 and the backlight module 563 of the panel module 560, the second light-absorbing layer 231, such as a Black Matrix (Black Matrix), may be coated on only the side of the first light-transmitting member 561 to absorb the stray light, so as to prevent the stray light from entering the light-sensing unit 270 and affecting the image recognition.

Referring to fig. 7A and 7B, in the image capturing apparatus 70 of the present embodiment, the first light source 750 is located on one outer side of the adhesive layer 240, and the photosensitive unit 770 is located on the other outer side of the adhesive layer 240; the first light absorbing layer 230 is located on the surfaces of the inner frame region 221 and the outer frame region 222 on the same side as the first light source 750; the third light absorbing layer 232 is located on the surfaces of the inner frame region 221 and the outer frame region 222 on the same side as the photosensitive unit 770; wherein the inner frame region 221 covers an edge of the laminating layer 240; the first light source 750 is configured to emit a light beam, and the light beam is projected to the light-transmitting substrate 200 through the adhesive layer 240, so that the light beam reflected by an object (for example, a finger, but not limited thereto) on the image capturing device 70 is absorbed by the light-sensing unit 770, thereby completing Biometric Identification (biometrical Identification).

In the embodiment where the photosensitive unit 770 is located at the side edge, the thickness of the image capturing device 70 can be made thinner, so as to meet the trend of light, thin, short and small handheld device. And the third light absorbing layer 232 may absorb only light having a wavelength different from that of the first light source 750 and pass light having the same wavelength as that of the first light source 750. For example, the first light source 750 is Infrared (IR), and the third light absorbing layer 232 is a light absorbing material that can pass infrared (IR pass). Therefore, the third light absorbing layer 232 can be designed correspondingly according to the wavelength of the visible light or the invisible light of the first light source 750.

Incidentally, although the light absorbing layer shown in the embodiment of the present invention is attached to the lower surface of the light transmitting substrate, the present invention is not limited thereto. In other embodiments, the light absorbing layer may be disposed on the upper surface of the transparent substrate.

Fig. 8 is a schematic top view of an image capturing device 80. In the present embodiment, a first light source 850, a second light source 851 and a third light source 852 are disposed below the outer frame region 222. The image width can be increased by the plurality of light sources, and multi-finger identification can be realized. Because more and more personal private data are loaded in the mobile phone, in one embodiment, three fingers can be used for fingerprint identification in a mobile phone display area at the same time, so that the safety is greatly improved.

In other embodiments, a filter layer may be placed over the photo-sensing unit; the filter layer has a function of filtering a specific wavelength, and light reflected by the light-transmitting substrate passes through the filter layer to be absorbed by the light-sensing unit.

It is above to synthesize, the utility model provides a get for instance device of a plurality of different embodiments, get for instance the structure complexity of device not high, and easily realize, accord with the frivolous short and small advantage of current electronic device.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention, which is intended to cover all equivalent changes and modifications of the shapes, structures, features and spirit of the invention described in the claims.

Claims

1. An image capturing apparatus, comprising:

the light-transmitting substrate is divided into a display area, an inner frame area and an outer frame area;

the first light absorption layer is positioned in the inner frame area and the outer frame area of the light-transmitting substrate;

the first light source is arranged below the light-transmitting substrate;

the photosensitive unit is arranged below the light-transmitting substrate;

the laminating layer is arranged below the light-transmitting substrate and is provided with a first surface and a second surface opposite to the first surface; and

the panel module is arranged below the laminating layer;

the outer frame region is the outermost edge of the light-transmitting substrate, and the inner frame region is connected with the display region and the outer frame region;

the first surface of the bonding layer is bonded with the display area and the inner frame area of the transparent substrate, and the second surface of the bonding layer is bonded with the panel module;

the inner frame area of the light-transmitting substrate covers the edge of the laminating layer; and

the first light source is used for emitting a light beam, and the light beam is projected to the light-transmitting substrate through the laminating layer.

2. The image capturing apparatus of claim 1, wherein the first light source is located outside the laminating layer and below the outer frame region.

3. The image capturing device as claimed in claim 2, further comprising a second light absorbing layer disposed on a side of said panel module that is on the same side as said first light source.

4. The image capturing apparatus of claim 2, wherein the light sensing unit is disposed on the opposite side of the first light source, and outside the adhesive layer and below the outer frame region.

5. The image capturing device of claim 1, wherein a refractive index of the light transmissive substrate is greater than a refractive index of the adhesive layer.

6. The image capturing device as claimed in claim 5, wherein a ratio of a refractive index of the adhesion layer to a refractive index of the transparent substrate is between 0.886 and 0.995.

7. The image capturing apparatus of claim 1, wherein the thickness of the light transmissive substrate is greater than the thickness of the attachment layer.

8. The image capturing device as claimed in claim 7, wherein the thickness of the transparent substrate is between 100 μm and 10 mm.

9. The image capturing device as claimed in claim 7, wherein the thickness of the adhesive layer is between 10 μm and 1 mm.

10. The image capturing apparatus as claimed in claim 1, wherein the panel module comprises:

a first light-transmitting member; and

a second light absorbing layer;

the first light source is located on one of the outer sides of the adhesive layer, and the second light absorption layer covers the side edge of the first light-transmitting part, which is located on the same side as the first light source.

11. The image capturing apparatus as claimed in claim 1, wherein the panel module comprises:

a first light-transmitting member;

a second light-transmitting member;

a second light absorbing layer; and

a flexible printed circuit board;

the first light source is located on one of the outer sides of the laminating layer, the second light absorption layer covers the side edge of the first light transmission part, which is located on the same side as the first light source, and the flexible printed circuit board covers the side edge of the second light transmission part, which is located on the same side as the first light source.

12. The image capturing apparatus of claim 1, wherein the first light source has a wavelength different from a wavelength of light emitted by the panel module.

13. The image capturing apparatus as claimed in claim 12, further comprising a filter layer disposed on the light sensing unit, wherein the light beam emitted from the first light source is projected to the light sensing unit after passing through the filter layer.

14. The image capturing apparatus of claim 1, further comprising a second light source disposed under the transparent substrate and located on the same outer side of the adhesive layer as the first light source.

15. The image capturing apparatus as claimed in claim 2, further comprising:

a third light absorbing layer;

the first light source is positioned on one of the outer sides of the laminating layer, and the first light absorption layer is positioned on the surfaces of the inner frame area and the outer frame area on the side;

the light sensing unit is positioned on the other outer side of the laminating layer opposite to the first light source, and the third light absorption layer is positioned on the surfaces of the inner frame area and the outer frame area on the side.

16. The image capturing device as claimed in claim 15, wherein the third light absorbing layer is capable of passing light with the same wavelength as the first light source.