TWM575561U - Image capture apparatus - Google Patents

Abstract

An image capture apparatus is provided. The image capture apparatus includes a transparent cover, a display panel, a light-guiding element, a light-emitting element, and an image capture element. The transparent cover has a surface in contact with an environmental medium, and the surface has a display region. The display panel is disposed under the transparent cover corresponding to the display region. The light-guiding element is disposed between the display panel and the transparent cover and divided into a first light-transmission portion, a second light-transmission portion and a light-penetrating portion, in which the light-penetrating portion overlaps with the display region in a vertical direction, and the first and second light-transmission portions are respectively located at two opposite sides of the light-penetrating portion. The light-emitting element is disposed at one side of the light-guiding element for generating a sensing beam entering the first light-transmission portion. The sensing beam is transmitted to the light-penetrating portion so as to be projected to the display region of the transparent cover, and an amount of the sensing beam is totally reflected by the surface to form a signal beam entering the second light-transmission portion through the light-penetrating portion. The image capture element is disposed at another side of the light-guiding element to receive the signal beam transmitted by the second light-transmission portion.

Description

Image capture device

The present invention relates to an electronic device, and more particularly to an under-display image capture apparatus.

Existing optical biometric devices can be used to detect and recognize faces, sounds, irises, retinas or fingerprints. Taking the fingerprint identification device as an example, the fingerprint identification device can be used in electronic products (such as smart phones or tablets) to identify the user.

In existing electronic products, a light beam generated by a display panel is generally used as a sensing light source for fingerprint recognition. The aforementioned display panel is, for example, an organic light emitting diode display panel. In a fingerprint identification device currently used in an electronic product, when a user presses a light-transmitting plate located at the outermost side with a finger, a light beam generated by the display panel is projected onto the light-transmitting plate, and the light-transmitting plate is intersected with the environmental medium. The interface (ie, the outer surface of the light transmissive plate) is totally reflected and then received by the image sensor.

Since the finger has a plurality of irregular ridges and indentations, when the user places the finger on the light-transmitting member, the ridge will contact the light-transmitting member, but the concave groove will not contact the light-transmitting member. Therefore, the ridges contacting the light transmitting member may destroy the total reflection of the light beam in the light transmitting member, and the concave lines not contacting the light transmitting member will not affect the total reflection of the light beam, thereby causing the fingerprint captured by the image sensor. The pattern has dark lines corresponding to the ridges and bright lines corresponding to the indentations. Subsequently, the fingerprint image captured by the image sensor is processed by the image processor to further determine the identity of the user.

However, when the existing fingerprint identification device is integrated with the thin film transistor liquid crystal display, the light beam generated by the backlight module of the thin film transistor liquid crystal display is diffused by the diffusion sheet before being projected onto the light transmission plate. So, when capturing a fingerprint image, project to The beam of the light-transmitting plate will be less uniform, resulting in a blurred image of the fingerprint obtained, which affects the accuracy of the identification.

A illuminating member is additionally provided in the prior art to generate a light beam for recognizing the fingerprint. After the light beam generated by the illuminating member enters the light transmitting member, it is totally reflected multiple times in the light transmitting member. When the user presses the outer surface of the light transmissive member with a finger, the image sensor can capture the fingerprint pattern.

However, the outer surface of the light transmissive member is easily attached by particles or dust and the like, and the total reflection of the light beam in the light transmissive member is broken. Therefore, before the beam is transmitted to the position where the finger is pressed, a part of the beam is lost, thereby affecting the image quality of the image sensor.

The technical problem to be solved by the present invention is to provide an image capturing device for the deficiencies of the prior art, which can avoid the problem that the outer surface of the light transmissive member affects the image quality due to the attachment.

In order to solve the above technical problem, one of the technical solutions adopted by the present invention is to provide an image capturing device, comprising: a transparent cover, a display panel, a light guide, a light-emitting component, and an image capture device. element. The light transmissive cover has a surface in contact with the environmental medium, and the surface has a display area. The display panel is disposed under the transparent cover plate corresponding to the display area. The light guide is disposed between the display panel and the transparent cover. The light guiding member is divided into a first light conducting portion, a second light conducting portion, and a light penetrating portion, wherein the display region and the light penetrating portion overlap in a vertical direction, and the first light conducting portion and the second light conducting portion are respectively Located on opposite sides of the light penetrating portion. The illuminating element is disposed on one side of the light guiding member and configured to generate a sensing beam entering the first light guiding portion. The sensing beam is transmitted to the light penetrating portion in the first light conducting portion to be projected to the display area of the transparent cover plate, and a portion of the sensing beam is totally reflected by the surface to form the second light from the light penetrating portion a signal beam of the conducting portion. The image capturing component is disposed on the other side of the light guiding member to receive the signal light beam transmitted in the second light guiding portion.

Another technical solution adopted by the present invention is to provide an image capturing device, comprising: a transparent cover, a display panel, a first reflective layer, a second reflective layer, a light emitting component, and an image capture device. element. The light transmissive cover has a surface in contact with the environmental medium, and the surface has a display area. The display panel is disposed under the transparent cover and corresponds to the display area. The display panel includes at least a first substrate and a second substrate coupled to the first substrate, the first substrate having an upper surface facing the transparent cover and a lower surface opposite the upper surface. The first reflective layer is disposed on the upper surface and has an opening. The second reflective layer is disposed on the lower surface, and the first reflective layer and the second reflective layer at least partially overlap in a thickness direction of the first substrate. The illuminating element is disposed on one side of the display panel for generating a sensing beam of the first substrate. The sensing beam is transmitted to the opening through the first reflective layer and the second reflective layer, and is projected to the transparent cover plate, and a portion of the sensing beam is totally reflected by the surface to form a signal beam. The image capturing component is disposed on the other side of the display panel to receive the signal beam.

Another technical solution adopted by the present invention is to provide an image taking device comprising: a transparent cover, a display panel, a light guide, a light-emitting component, and an image capture component. The light transmissive cover has a surface in contact with the environmental medium, and the surface has a display area. The display panel is disposed under the transparent cover plate corresponding to the display area. The light guide is disposed between the display panel and the transparent cover, wherein the light guide is divided into a light conducting portion and a light penetrating portion. The illuminating element is disposed on one side of the light guiding member and configured to generate a sensing beam entering the light guiding portion. The sensing beam is transmitted to the light penetrating portion in the light conducting portion to be projected to the display region of the light transmissive cover plate, and a portion of the sensing beam is totally reflected by the surface to form the light guiding portion entering the light guiding portion a signal beam. The image capturing component is disposed on the other side of the light guiding member to receive the signal beam.

One of the beneficial effects of the present invention is that the image capturing device provided by the present invention can be distinguished from a light conducting portion and a light penetrating portion by a light guiding member disposed between the display panel and the transparent cover plate. Or a technical solution of "providing a first reflective layer and a second reflective layer having openings on the upper and lower sides of the first substrate of the display panel" The measuring beam is mainly transmitted in the light guiding member or the first substrate to prevent the attachment attached to the surface of the transparent cover plate from affecting the image quality.

In order to further understand the features and technical contents of this creation, please refer to the following detailed description and drawings of the present invention. However, the drawings are provided for reference and description only, and are not intended to limit the creation.

1, 1', 2‧‧‧ image capture device

10, 20‧‧‧Transparent cover

10S, 20S‧‧‧ surface

F‧‧‧ objects

SA‧‧‧Sensing range

120‧‧‧Lighting body

10A, 20A‧‧‧ display area

10B, 20B‧‧‧ non-display area

11, 21‧‧‧ display panel

12‧‧‧Light guides

P1‧‧‧First Light Conduction Department

P2‧‧‧Second light transmission department

P3, P3’‧‧‧Light penetration

13, 23‧‧‧Lighting elements

14, 24‧‧‧Image capture components

111, 211‧‧‧ first substrate

112, 212‧‧‧ second substrate

CF‧‧‧ color filter layer

17, 27‧‧‧ Backlight assembly

16, 16', 26‧‧‧ Beam Orienting Components

16S‧‧‧reflective surface

120a‧‧‧ first surface

120b‧‧‧second surface

121, 221‧‧‧ first reflective layer

122, 222‧‧‧ second reflective layer

121h, 221h‧‧‧ openings

15, 25‧‧‧ optical glue

P1’‧‧‧Light Conducting Department

211a‧‧‧ upper surface

211b‧‧‧ lower surface

W‧‧‧Maximum width of sensing range

W1‧‧‧Max width

t ₁ , t ₂ , t ₃ ‧‧‧ thickness

L‧‧‧Sensing beam

L’‧‧‧Signal beam

Θ‧‧‧incidence angle

Fig. 1 is a top plan view showing an image taking device of an embodiment of the present invention.

Fig. 2 is a partial cross-sectional view showing the image taking device of an embodiment of the present invention.

Fig. 3 is a partially enlarged schematic view showing a beam directing element of another embodiment of the present invention.

Fig. 4 is a partially enlarged schematic view showing a light transmitting portion of the image taking device of the embodiment of the present invention.

Fig. 5 is a partial cross-sectional view showing the image taking device of another embodiment of the present invention.

Fig. 6 is a partial cross-sectional view showing the image taking device of still another embodiment of the present invention.

The following is a description of an embodiment of the "image taking device" disclosed in the present disclosure by a specific embodiment, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in the present specification. The present invention can be implemented or applied in various other specific embodiments. The details of the present specification can also be variously modified and changed without departing from the concept of the present invention. In addition, the drawings of the present creation are only for the purpose of simple illustration, and are not stated in advance according to the actual size. The following embodiments will further explain the related technical content of the present invention, but the disclosure is not intended to limit the scope of protection of the present invention.

It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements or signals, these elements or signals are not limited by these terms. These terms are primarily used to distinguish one element from another, or one signal and another. In addition, the term "or" as used herein shall be considered as the case may be. A combination of any one or more of the associated listed items is included.

Please refer to FIG. 1 to FIG. 2 . Fig. 1 is a top plan view showing an image taking device of an embodiment of the present invention. Fig. 2 is a partial cross-sectional view showing the image taking device of an embodiment of the present invention. The image capturing device provided in the present embodiment can be applied to an electronic product for capturing an image of an object F for identification. The aforementioned electronic product is, for example, a smart phone or a tablet. Further, the image capturing device of this embodiment is a screen lower image capturing device.

Accordingly, the image taking device 1 can be used in an environmental medium such as air, water or other kinds of environmental media. The object F is, for example, a user's finger, a palm, a wrist, or an eyeball, and the image captured by the image capturing device 1 is, for example, a fingerprint, a palm print, a vein, a pupil, or an iris, but the creation is not limit. In this creation, the fingerprint image is taken as an example to further illustrate the creation.

As shown in FIG. 2, the image capturing apparatus 1 of one embodiment of the present invention includes a transparent cover 10, a display panel 11, a light guide 12, a light-emitting element 13, and an image capturing element 14.

Referring to FIG. 1 and FIG. 2 together, the transparent cover 10 has a surface 10S in contact with the environmental medium. In the present embodiment, the surface 10S defines a display area 10A and a non-display area 10B.

When the image capturing device 1 is used to capture fingerprints and/or vein images, the surface 10S of the transparent cover 10 can be touched or pressed by a finger for detection and identification. In the present embodiment, the material of the transparent cover 10 may be a rigid material or a flexible material. For example, the material of the transparent cover 10 may be selected from the group consisting of glass, polymethymethacrylate (PMMA) or polycarbonate (PC) or other suitable materials.

In this embodiment, in order to allow the user to see the screen displayed by the display panel 11 through the transparent cover 10, the material of the transparent cover 10 is transparent to visible light. That is, the transmittance of visible light to the transparent cover 10 is greater than 80%.

Referring to FIG. 2, the display panel 11 is disposed below the transparent cover 10 corresponding to the display area 10A for displaying a picture. The display panel 11 can be rigid. In other words, it can also be a flexible panel. The display panel can be an organic light emitting diode display panel, a liquid crystal display panel or a display panel with a touch electrode (ie, having a touch). Function) and so on, this creation is not limited.

In this embodiment, the display panel 11 includes at least a first substrate 111 and a second substrate 112 coupled to the first substrate 111. When the display panel 11 is a thin film transistor liquid crystal display panel, the first substrate 111 is a color filter array substrate. That is, the display panel 11 further has a color filter layer CF disposed on the first substrate 111. The second substrate 112 is a thin film transistor array substrate. In addition, the display panel 11 further includes a display medium, such as a liquid crystal layer, between the first substrate 111 and the second substrate 112.

When the display panel 11 is a thin film transistor liquid crystal display panel, the image capturing device 1 further includes a backlight assembly 17 , and the display panel 11 is disposed on the backlight assembly 17 . The backlight assembly 17 includes a light emitting member (not shown) and an optical film group (not shown). The optical film group can be used to uniformly diffuse and project a light beam generated by the light emitting member to the display panel 11. In this embodiment, the light beam produced by the illuminating member is a visible light beam.

Please refer to Figure 2. The light guide 12 of the embodiment is disposed between the display panel 11 and the transparent cover 10. The light guide member 12 is divided into a first light conducting portion P1, a second light conducting portion P2, and a light transmitting portion P3, and the first light conducting portion P1 and the second light conducting portion P2 are respectively located in the light transmitting portion. The opposite side of P3.

Referring to FIG. 1 together, it is noted that in the present embodiment, the display area 10A of the transparent cover 10 and the light penetrating portion P3 overlap in a vertical direction. Further, the first light guiding portion P1 and the second light guiding portion P2 also overlap the display region 10A in the vertical direction.

Further, a sensing light beam L transmitted in the first light guiding portion P1 is transmitted to the light transmitting portion P3 to be projected to the display region 10A of the transparent cover 10. That is, the sensing light beam L is at least reflected in the first light guiding portion P1 of the light guiding member 12. Once, it is transmitted to the light penetrating portion P3.

The sensing beam L passes through the total reflection of the surface 10S of the translucent cover 10 to form a signal beam L'. The signal beam L' is again incident on the second light-conducting portion P2 by the light-transmitting portion P3, and is transmitted to the image capturing member 14 at least once.

Referring to FIG. 2, in the present embodiment, the aforementioned sensing light beam L is generated by the light-emitting element 13. The light-emitting element 13 is, for example, a light-emitting diode. In the present embodiment, the light-emitting element 13 is an infrared light-emitting element, and thus the sensing light beam L is infrared light. In an embodiment, the peak wavelength of the sensing beam L may be in the range of 800 nm to 900 nm.

In the present embodiment, the light-emitting element 13 is disposed on one side of the light guide 12 and is used to generate the sensing light beam L entering the first light-conducting portion P1. That is, the light-emitting element 13 is disposed on the side close to the first light-conducting portion P1 and disposed under the non-display area 10B of the light-transmitting cover 10.

Further, in the present embodiment, the image taking device 1 further includes a beam directing element 16. The beam directing element 16 can be an optical lens element, a secondary element, a grating, an optical microstructure layer, a diffractive element, or a combination thereof, and the present invention is not limited. The beam directing element 16 is disposed on the optical path of the sensing light beam L to adjust the incident angle θ of the sensing light beam L into the first light conducting portion P1. Specifically, as shown in FIG. 2, the sensing light beam L generated by the light-emitting element 13 passes through the light beam directing element 16 and enters the light guide 12 at a predetermined incident angle θ. In the present embodiment, the beam directing element 16 is disposed between the light emitting element 13 and the light guide 12.

However, this creation does not limit the structure and position of the beam directing element 16 as long as the above objectives are achieved. Referring to FIG. 3, a partial enlarged view of a beam directing element of another embodiment of the present invention is shown. In the present embodiment, beam directing element 16' is an optical microstructure and beam directing element 16' has a reflective surface 16S.

The beam directing element 16' of the present embodiment is disposed on the light guiding member 12, and the reflecting surface 16S corresponds to the light emitting surface of the light emitting element 13. Accordingly, the sensing light beam L generated by the light-emitting element 13 is first incident on the light guiding member 12 via the beam directing element 16'. Projected to the reflective surface 16S. Subsequently, the sensing beam L is further reflected by the reflecting surface 16S to enter the first light conducting portion P1 at a predetermined incident angle θ, wherein the incident angle is between 45 degrees and 55 degrees.

1 and 2, the image capturing element 14 is disposed on the other side of the light guiding member 12 to receive the signal light beam L' transmitted in the second light guiding portion P2. In detail, the image capturing element 14 is disposed on a side close to the second light guiding portion P2 and is located below the non-display area 10B of the transparent cover 10. In addition, it should be noted that in a possible embodiment of any of the illustrative embodiments of the present invention, a band pass filter layer is disposed between the image capturing element 14 and the light guiding member 12.

After receiving the signal beam L', the image capturing element 14 converts the signal beam L' into an electrical signal. In other words, the image capturing element 14 is a photoelectric conversion element, such as a Charge Coupled Device (CCD) or a Complementary Metal-Oxide Semiconductor (CMOS). However, in other embodiments, the image capture component 14 can also use other image sensors.

Based on the above, when the object F (eg, a finger) contacts the surface 10S of the transparent cover 10, the convex ridge of the finger contacts the surface 10S, so that a part of the sensing light beam L projected onto the surface 10S cannot generate total reflection, thereby making The image capturing element 14 obtains a dark line corresponding to the finger relief. On the other hand, the concave of the finger does not contact the surface 10S of the translucent cover 10, and the other portion of the sensing beam L can still be totally reflected to form the signal beam L'. The signal beam L' is reflected by the second light guiding portion P2 and received by the image capturing element 14. Thereafter, the received signal beam L' is subjected to image processing by an image processing element to obtain a fingerprint image between the light and dark.

It is to be noted that the sensing light beam L can only be projected to a partial range of the display area 10A due to the size limitation of the light penetrating portion P3. Similarly, the signal beam L' formed only by the total reflection of the sensing beam L in a specific range re-enters the light transmitting portion P3, and is transmitted to the image capturing member 14 by the second light guiding portion P2.

Accordingly, as shown in FIG. 1, in the present creative embodiment, the display area 10A will have Corresponding to the sensing range SA of the light penetrating portion P3. Therefore, only the object F located in the sensing range SA is irradiated by the sensing beam L, and the signal beam L' of the second light guiding portion P2 of the light transmitting portion P3 is formed. In other words, when the user places a finger in another area outside the sensing range SA, the image capturing element 14 does not receive the signal beam L'.

According to this, by limiting the size and position of the light penetrating portion P3 of the light guide member 12 and the incident angle θ of the sensing light beam L, the magnitude and position of the sensing range SA can be defined. In the present embodiment, the maximum width of the light penetrating portion P3 may be greater than the maximum width of the sensing range SA.

Referring to FIG. 2 and FIG. 4, FIG. 4 is a partially enlarged schematic view showing a light transmitting portion of the image capturing apparatus according to an embodiment of the present invention. In the present embodiment, the light guide 12 includes a light guiding body 120, a first reflective layer 121, and a second reflective layer 122. The light guiding body 120 has a first surface 120a and a second surface 120b opposite to the first surface 120a, and the light guiding body 120 is disposed with the first surface 120a facing the transparent cover 10.

In the present embodiment, the first reflective layer 121 is disposed on the first surface 120a and has an opening 121h, and the second reflective layer 122 is disposed on the second surface 120b. In other words, the first reflective layer 121 and the second reflective layer 122 are respectively located on opposite sides of the light guiding body 120.

As shown in FIG. 2, the first reflective layer 121 and the second reflective layer 122 overlap each other in the vertical direction to define at least the first light conducting portion P1 and the second light conducting portion P2 described above. In addition, the opening 121h of the first reflective layer 121 and the second reflective layer 122 overlap each other in the vertical direction to define the aforementioned light penetrating portion P3. In addition, the opening 121h and the display region 10A overlap each other in the thickness direction of the light guiding body 120.

In an embodiment, the refractive index of the first reflective layer 121 and the refractive index of the second reflective layer 122 are both lower than the refractive index of the light guiding body 120. For example, if the refractive index n _{L of the} light guiding body 120 is about 1.4, the material of the first reflective layer 121 and the second reflective layer 122 may select a material having a refractive index n _{R of} less than 1.4, for example, a methyl low refractive silicone. By controlling the incident angle θ of the sensing beam L into the light guiding body 120, the sensing beam L can be totally reflected multiple times in the light guiding body 120.

Accordingly, in the present embodiment, the sensing light beam L entering the first light-conducting portion P1 is transmitted to the light-transmitting portion by at least one total reflection. Similarly, the signal light beam L' entering the second light-conducting portion P2 through the light-transmitting portion P3 can also be received by the image capturing element 14 by at least one total reflection.

It is assumed that the refractive indices of the first reflective layer 121 and the second reflective layer 122 are the same. The refractive index n _{R of the} first reflective layer 121 (or the second reflective layer 122), the refractive index n _L of the light guiding body 120, and the incident angle θ of the sensing light beam L into the light guiding body 120 satisfy the following relationship: θ>sin ^-1 (n _L /n _R ).

As shown in FIG. 2, the image taking device 1 of the embodiment further includes an optical glue 15. The optical adhesive 15 is located between the first reflective layer 121 and the transparent cover 10, and a portion of the optical adhesive 15 is filled into the opening 121h.

In the present embodiment, the refractive index of the optical adhesive 15, the refractive index of the light guiding body 120, and the refractive index of the transparent cover 10 are substantially the same by selecting a suitable material. According to this, it is possible to prevent the sensing light beam L from entering the light-transmitting cover plate 10 from the light-transmitting portion P3 or the signal light beam L' being refracted when the light-transmitting portion re-enters the light-guiding body 120.

The image capturing device 1 of the present embodiment further includes another optical adhesive 15 disposed between the display panel 11 and the light guide 12 such that the light guide 12 can be coupled to the display panel 11 through the optical adhesive 15.

In addition, referring to FIG. 4, the light transmitting portion P3 corresponds to a sensing range SA of the display area 10A, and a maximum width W of the sensing range SA is smaller than a maximum width of the light transmitting portion P3, that is, smaller than the opening 121h. Maximum width W1.

Further, as shown in FIG. 4, in the present embodiment, a maximum width W1 of the opening 121h, a maximum width W of the sensing range SA, a thickness t ₁ of the light guiding body 120, the light guiding body 120 and the transparent cover The shortest vertical distance t ₂ between the plates 10 (that is, the thickness of the optical glue 15 located in the opening 121h), the thickness t _{3 of the} transparent cover 10, and the incident angle θ of the sensing beam L satisfy the following relationship: (t ₁ + t ₂ + t ₃ ) tan θ > W1 > W + 2 (t ₂ + t ₃ ) tan θ.

It should be noted that in the present embodiment, the backlight assembly 17 of the image taking device 1 is used to generate a visible light beam. Therefore, the transmittance of the visible light beam to the light guide member 12 and the transparent cover plate 10 is greater than 80%, so that the user can see the screen displayed by the display panel 11 in the display area 10A.

In another embodiment, the sensing beam L is infrared light, and the first reflective layer 121 and the second reflective layer 122 are both infrared light reflecting films. It is to be noted that the first reflective layer 121 and the second reflective layer 122 may select materials having high reflectance for infrared light but high transmittance for visible light.

For example, the infrared light reflecting film may be a dielectric multilayer film formed by alternately stacking a high refractive index material layer and a low refractive index material layer. Common high refractive index materials such as titanium oxide (TiO ₂ , Ti ₃ O ₅ ) or tantalum oxide (Ta ₂ O ₅ ), low refractive index materials such as lanthanum oxide (SiO ₂ ) or magnesium fluoride (MgF ₂ ), Sometimes with a medium refractive material such as alumina (Al ₂ O ₃ ) or zirconia (ZrO ₂ ).

It should be noted that the present invention is not limited to the above embodiment as long as the sensing beam L and the signal beam L' can be transmitted in the first light guiding portion P1 and the second light guiding portion P2. For example, in other embodiments, one of the first reflective layer 121 and the second reflective layer 122 is an infrared light reflecting film, and the other layer selects a material whose refractive index is lower than the refractive index of the light guiding body 120, and cooperates with Controlling the incident angle θ of the sensing beam L onto the first reflective layer 121 or the second reflective layer 122 can also achieve the purpose of the present invention.

Compared with the existing fingerprint identification device, in the present embodiment, by the cooperation of the first reflective layer 121 and the second reflective layer 122, the sensing beam L and the signal beam L' can be mainly under the transparent cover plate 10. Passed inside the light guiding body 120. In addition, a specific sensing range SA can be defined in the display region 10A of the transparent cover 10 by the first reflective layer 121 having the opening 121h. Therefore, it is possible to prevent the contamination of the surface 10S of the translucent cover 10 from causing a decrease in the intensity of the sensing light beam L, which causes a problem of lowering the image quality.

Referring to FIG. 5, a partial cross-sectional view of the image taking device of another embodiment of the present invention is shown. The same components of the image capturing device 1' of the present embodiment as those of the image capturing device 1 of the previous embodiment have the same or similar reference numerals, and the same portions will not be described again.

In the present embodiment, the opening 121h of the first reflective layer 121 overlaps the display area 10A and the non-display area 10B in the vertical direction. Further, the opening 121h extends from above the display panel 11 to above the image capturing element 14.

Accordingly, the light guiding member 12 of the present embodiment can be divided into a light conducting portion P1' and a light penetrating portion P3'. In the plan view, the light penetrating portion P3' overlaps the display region 10A and the non-display region 10B above the image capturing member 14.

Further, the light-emitting element 13 is disposed adjacent to the light-conducting portion P1', and the image-capturing element 14 is disposed adjacent to the light-transmitting portion P3. According to this, the sensing light beam L generated by the light-emitting element 13 can be transmitted to the light-transmitting portion P3' through the light-conducting portion P1'.

In addition, the signal beam L′ formed after the sensing beam L is totally reflected by the sensing range SA can directly enter the image capturing component 14 through the light penetrating portion P3′, and does not need to undergo multiple reflections to enter the image capturing device. Element 14. Therefore, the image pickup device 1' of the present embodiment can avoid the loss of the signal light beam L' during the transfer.

Referring to FIG. 6, a partial cross-sectional view of an image taking device according to still another embodiment of the present invention is shown. The image capturing device 2 of the present embodiment includes a transparent cover 20, a display panel 21, a first reflective layer 221, a second reflective layer 222, a light-emitting element 23, and an image capturing element 24.

Similar to the embodiment of Figure 2, the light transmissive cover 20 has a surface 20 that is in contact with an environmental medium, and the surface 20 defines a display area 20A and a non-display area 20B.

In the present embodiment, the sensing beam L and the signal beam L' are conducted through the first substrate 211 of the display panel 21. Therefore, the first reflective layer 221 and the second reflective layer 222 are opposite surfaces of the first substrate 211 disposed on the display panel 21.

Specifically, the first substrate 211 of the display panel 21 has an upper surface 211a facing the transparent cover 10 and a lower surface 211b opposite to the upper surface 211a. The first reflective layer 221 having the opening 121h is disposed on the upper surface 211a, and the second reflective layer 222 is disposed on the lower surface 211b.

The first reflective layer 221 and the second reflective layer 222 at least partially overlap in the thickness direction of the first substrate 211. Therefore, the portion where the first reflective layer 221 overlaps the second reflective layer 222 defines the first light-conducting portion P1 and the second light-conducting portion P2 on the first substrate 211. In addition, a portion where the opening 221h overlaps with the second reflective layer 222 defines a light penetrating portion P3 in the first substrate 111. The first light guiding portion P1 and the second light guiding portion P2 are respectively located on opposite sides of the light transmitting portion P3.

In addition, in the present embodiment, the opening 221h of the first reflective layer 221 overlaps only the display area 20A. However, in other embodiments, the opening 221h of the first reflective layer 221 may also overlap the display area 20A and the non-display area 20B at the same time, or only overlap the non-display area 20B.

The light emitting element 23 is disposed on one side of the display panel 21 for generating a sensing light beam L entering the first substrate 211. The sensing light beam L is transmitted to the opening 221h through the first reflective layer 221 and the second reflective layer 222, and is projected to the transparent cover plate 20. The sensing beam L is totally reflected by the surface 20 of the translucent cover 20 to form a signal beam L'.

The image capturing element 24 is disposed on the other side of the display panel 21 to receive the signal beam L'. In the present embodiment, after the signal light beam L' enters the first substrate 211 through the opening 221h, it is transmitted to the image capturing element 24 in the second light conducting portion P2. However, in other embodiments, when the opening 221h is positioned adjacent to the image capturing element 24, the signal beam L' can enter the image capturing element 24 directly through the opening 221h. The material selection of the first reflective layer 221 and the second reflective layer 222, and the maximum width W1 of the opening 221h can be referred to the previous description, and the description thereof will not be repeated here.

It should be noted that, in the embodiment, when the display panel 21 is a thin film transistor liquid crystal display panel, the display panel 21 further includes a color filter layer CF. The color filter layer CF is disposed on the lower surface 211b of the first substrate 211 and covers the second reflective layer 222. In other words, the second reflective layer 222 is located between the color filter layer CF and the first substrate 211.

In addition, the image capturing device 2 may further include a light source for generating a visible light beam. The backlight assembly 27. Similar to the previous embodiment, the display panel 21 is disposed on the backlight assembly 27. In addition, the transmittance of the visible light beam to the first reflective layer 221, the second reflective layer 222, and the transparent cover 20 is greater than 80%. However, in other embodiments, when the display panel 21 is an organic light emitting diode panel, the backlight assembly 27 may also be omitted.

In addition, the terms "light-conducting portion", "first light-conducting portion" or "second light-conducting portion" in all embodiments of the present invention are for guiding the light member 12 or the first substrate 211 to allow the sensing beam L and the signal. The portion of the light beam L' is transmitted, and the "light penetrating portion" is a portion of the light guide member 12 or the first substrate 211 that allows the sensing beam L and the signal beam L' to enter and exit other components.

Therefore, when the sensing beam L and the signal beam L′ are infrared light, the “light conducting portion”, the “first light conducting portion” or the “second light conducting portion” are both guiding the light member 12 or the first substrate 211 . The portion that conducts infrared light, and the "light-transmitting portion" is a portion that guides the light member 12 or the first substrate 211 to allow infrared light to penetrate.

That is to say, the backlight units 17 and 27 of the image taking devices 1, 1', 2 or the visible light beams generated by the display panels 11, 21 themselves are not in the "light conducting portion" or the "first light conducting portion". Or the "second light conducting portion" is reflected, which affects the user viewing the display screen.

Further, the image capturing device 1, 1', 2 of the present embodiment may further include a band pass filter layer (not shown). In the embodiment shown in Figures 2 and 5, a band pass filter layer can be disposed between the image capture element 14 and the light guide 12 for filtering stray light other than the signal beam L'.

For example, when the signal beam L' is infrared light, the bandpass filter layer has a transmittance of at least 80% for the signal beam L' and less than 20% for visible light and ultraviolet light. Further, the band pass filter layer may be an infrared band pass filter layer, and may allow a light beam having a wavelength falling within a range of 800 nm to 900 nm to pass, and may filter a light beam having a wavelength falling outside the range of 800 nm to 900 nm. In other embodiments, the bandpass filter layer may allow a beam of light to fall within the range of 840 nm to 860 nm, or allow the wavelength to fall within another range of 890 nm to 990 nm. The beam passes through.

In the embodiment of FIG. 6, a band pass filter layer may be disposed between the image capture element 24 and the first substrate 211. As such, the band pass filter layer can prevent ambient light, the light beams generated by the display panels 11, 21 or the backlight assemblies 17, 27 from entering the image capture elements 14, 24, causing signal interference. According to this, by providing the band pass filter layer, the recognition accuracy of the image taking devices 1, 1', 2 can be improved.

In summary, one of the beneficial effects of the present invention is that the image capturing device 1, 1', 2 provided by the present invention is distinguished by a light guiding member disposed between the display panel and the transparent cover. The light-conducting portion and a light-transmitting portion or the "first reflective layer and the second reflective layer having openings on the upper and lower sides of the first substrate of the display panel" can make the sensing light beam L mainly in the transparent cover The light guide 12 or the first substrate 211 under the boards 10 and 20 is transferred, and the sensing range SA is defined by the openings 121h and 221h of the first reflective layers 121 and 221 to avoid adhesion to the transparent cover 10 , 20 surface 10S, 20S attachments affect imaging quality.

Further, in the present embodiment, the light guide member 12 under the transparent cover plates 10 and 20 or the first substrate 211 of the display panel 21 is used to transmit the sensing beam. L and the signal beam L', so that the contamination of the surfaces 10S, 20S of the transparent cover sheets 10, 20 can be prevented from causing a decrease in the intensity of the sensing beam L. Accordingly, the image taking devices 1, 1', 2 of the present embodiment can have better image taking quality.

The above disclosure is only a preferred and feasible embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, any equivalent technical changes made by using the present specification and the content of the schema are included in the application for this creation. Within the scope of the patent.

Claims (25)

An image taking device comprising: a transparent cover having a surface in contact with an environmental medium, wherein the surface has a display area; a display panel disposed on the display area corresponding to the display area a light guide member disposed between the display panel and the transparent cover plate, wherein the light guide member is divided into a first light conducting portion and a second light conducting portion And a light penetrating portion, the display region and the light penetrating portion overlap in a vertical direction, and the first light conducting portion and the second light conducting portion are respectively located in the light penetrating portion Two opposite sides; a light-emitting element disposed on one side of the light guide member and configured to generate a sensing light beam entering the first light-conducting portion, wherein the sensing light beam is in the first a light conducting portion is transmitted to the light penetrating portion to be projected to the display region of the light transmissive cover, and a portion of the sensing beam is totally reflected by the surface to form the light a signal beam entering the second light conducting portion through the penetrating portion; and an image Element, which is disposed on the other side of the light guide member, is transmitted to the receiver within the second signal light beam light conducting portion. The image capturing device of claim 1, wherein the light guiding member comprises: a light guiding body having a first surface and a second surface opposite to the first surface, wherein the a surface facing the transparent cover; a first reflective layer disposed on the first surface, wherein the first reflective layer has an opening; and a second reflective layer disposed on the first surface a second surface; wherein the first reflective layer and the second reflective layer overlap each other in the vertical direction to define at least the first light conducting portion and the second light conducting portion And the opening and the second reflective layer overlap each other in the vertical direction to define the light penetrating portion. The image capturing device of claim 2, wherein a refractive index of the first reflective layer and a refractive index of the second reflective layer are both lower than a refractive index of the light guiding body. The image capturing device of claim 2, wherein a refractive index n _{R of} the second reflective layer, a refractive index n _L of the light guiding body, and an incident angle of the sensing beam into the light guiding body θ satisfies the following relationship: θ > sin ^-1 (n _L /n _R ). The image capturing device of claim 2, wherein the sensing beam is infrared light, and the first reflective layer and the second reflective layer are both infrared light reflecting layers. The image capturing device of claim 2, further comprising an optical adhesive, wherein the optical adhesive is located between the first reflective layer and the transparent cover, and a part of the optical adhesive Fill in the opening. The image capturing device of claim 6, wherein the refractive index of the optical glue, the refractive index of the light guiding body, and the refractive index of the transparent cover plate are the same. The image capturing device of claim 2, wherein a maximum width W1 of the opening, a thickness t ₁ of the light guiding body, and a shortest vertical distance between the light guiding body and the transparent cover plate t ₂ , the thickness t _{3 of} the transparent cover plate, and the incident angle θ of the sensing beam satisfy the following relationship: 2 (t ₁ + t ₂ + t ₃ ) tan θ > W1. The image capturing device of claim 1, wherein the display area has a sensing range corresponding to the light penetrating portion, and a maximum width of the sensing range is smaller than the light penetrating portion A maximum width. The image capturing device of claim 1, further comprising a beam directing element disposed on the optical path of the sensing beam to adjust the sensing beam into the first light conducting portion An angle of incidence. The image capturing device of claim 1, further comprising a backlight assembly, wherein the backlight assembly is configured to generate a visible light beam, the display panel is disposed on the backlight assembly, and the visible light beam is opposite The transmittance of the light guide member and the transparent cover plate is greater than 80%. An image capturing device comprising: a transparent cover having a surface in contact with an environmental medium, wherein the surface has a display area; a display panel disposed under the transparent cover, and Corresponding to the display area, wherein the display panel includes at least a first substrate and a second substrate coupled to the first substrate, the first substrate having an upper surface facing the transparent cover And a lower surface opposite to the upper surface; a first reflective layer disposed on the upper surface and having an opening; a second reflective layer disposed on the lower surface, wherein the first The reflective layer and the second reflective layer at least partially overlap in a thickness direction of the first substrate; a light emitting element disposed on one side of the display panel for generating into the first substrate a sensing beam, wherein the sensing beam is transmitted to the opening through the first reflective layer and the second reflective layer, and projected to the transparent cover, the sensing beam Part of the surface is reversed To form a signal beam; and an image capturing element, which is disposed on the other side of the display panel, to receive the signal light beam. The image capturing device of claim 12, wherein a refractive index of the first reflective layer and a refractive index of the second reflective layer are both lower than a refractive index of the first substrate, so that the sensing The beam produces total reflection. The image capturing device of claim 13, wherein the refractive index n _{R of} the second reflective layer, the refractive index n _{L of} the first substrate, and the sensing beam are projected onto the first reflective layer The incident angle θ satisfies the following relationship: θ>sin ^-1 (n _L /n _R ). The image capturing device of claim 12, wherein the sensing beam is infrared light, and the first reflective layer and the second reflective layer are both infrared light reflecting layers. The image capturing device of claim 12, further comprising an optical adhesive, wherein the optical adhesive is located between the first reflective layer and the transparent cover, and a part of the optical adhesive Fill in the opening. The image capturing device of claim 12, wherein the refractive index of the optical glue, the refractive index of the first substrate, and the refractive index of the transparent cover sheet are the same. The image capturing device of claim 12, wherein a maximum width W1 of the opening, a thickness t ₁ of the first substrate, and a shortest vertical distance between the first substrate and the transparent cover plate t ₂ , the thickness t _{3 of} the transparent cover plate, and the incident angle θ of the sensing beam satisfy the following relationship: 2 (t ₁ + t ₂ + t ₃ ) tan θ > W1. The image capturing device of claim 12, further comprising a beam directing element disposed between the light emitting element and the first substrate to adjust the sensing beam into the first An incident angle of a substrate. The image capturing device of claim 12, wherein the opening and the display area overlap each other in the thickness direction, and the display area has a corresponding opening A sensing range, a maximum width of the sensing range being less than a maximum width of the opening. The image capturing device of claim 12, further comprising a backlight assembly, wherein the backlight assembly is configured to generate a visible light beam, the display panel is disposed on the backlight assembly, and the visible light beam is opposite to the The transmittance of a reflective layer, the second reflective layer, and the transparent cover sheet is greater than 80%. The image capturing device of claim 12, wherein the light transmissive cover further has a non-display area, the opening and the non-display area overlap each other in the thickness direction, and the non-display area has Corresponding to a sensing range of the opening, a maximum width of the sensing range is less than a maximum width of the opening. An image taking device comprising: a transparent cover having a surface in contact with an environmental medium, wherein the surface has a display area; a display panel disposed on the display area corresponding to the display area a light guide member disposed between the display panel and the transparent cover plate, wherein the light guide member is divided into a light conducting portion and a light penetrating portion; a light-emitting element disposed on one side of the light guide member and configured to generate a sensing light beam entering the light-conducting portion, wherein the sensing light beam is transmitted to the light in the light-conducting portion a penetrating portion to project to the display area of the light transmissive cover, and a portion of the sensing beam is totally reflected by the surface to form a light penetrating portion into the light guide a signal beam; and an image capturing element disposed on the other side of the light guiding member to receive the signal beam. The image capturing device of claim 23, wherein the light penetrating portion and the display region overlap each other in a vertical direction, and the display region has a sensing range corresponding to the light penetrating portion a maximum width of the sensing range is less than a maximum width of the opening. The image capturing device of claim 24, wherein the transparent cover further has a non-display area, the image capturing element is disposed under the non-display area, and the light penetrating portion is vertically The direction overlaps the display area and the non-display area above the image capture element.