WO2020224549A1 - Image sensor package - Google Patents

Abstract

The present invention relates to an image sensor package. The image sensor package comprises: a substrate, wherein 2N image sensors are disposed at intervals on the substrate in the horizontal direction, N being a natural number; a light reflection structure disposed at an upper portion of the substrate and spaced apart from each of the 2N image sensors in the horizontal direction, wherein the width of the light reflection structure gradually narrows down from bottom to top, a first left reflection surface is provided on a left inclined surface, and a first right reflection surface is provided on a right inclined surface; and a housing accommodating the 2N image sensors and the light reflection structure, wherein a second left reflection surface disposed relative to the first left reflection surface is obliquely provided on at least a portion of a left wall, a second right reflection surface disposed relative to the first right reflection surface is obliquely provided on at least a portion of a right wall, and a light entrance defining a light path is provided on at least a portion of an upper surface.

Description

Image sensor package Technical field

The present invention relates to image sensor packaging.

Background technique

An image sensor is a device that detects light reflected by a subject and outputs an image represented by an electrical signal. The image sensor is composed of a plurality of pixels that generate electrical signals corresponding to the amount of light detected. The size of the image sensor is mainly determined by the number of pixels. If the area occupied by pixels on the surface of the image sensor is increased, for example, the number of pixels or the area of the light receiving portion is increased, the area that the image sensor can detect also increases. However, the size of the silicon wafer required to manufacture the image sensor is limited, which occupies a considerable part of the manufacturing cost of the image sensor.

The demand for image sensors with a large detection area is relatively stable. The X-ray imaging device is a representative device that requires an image sensor with a large detection area. In order to expand the detection area or increase the resolution, various structures in which multiple image sensors are arranged have been proposed. The image sensors used in these structures are commonly used image sensors that are packaged. In the case where the application object is a large-scale device (for example, an X-ray imaging device, a TV camera, etc.), the physical size of the packaged common image sensor array does not become a big problem.

Summary of the invention

The technical problem to be solved by the invention

The object of the present invention is to provide an image sensor package that has a large detection area and can be mounted on a portable electronic device.

Means to solve technical problems

According to an aspect of the present invention, there is provided an image sensor package having a large area of detection area. The image sensor package may include: a base body, 2N (where N is a natural number) image sensors are arranged on the base body spaced apart in the horizontal direction; a light reflection structure to be horizontally aligned with each of the 2N image sensors The upper part is spaced apart on the upper part of the base, the width of the light reflection structure gradually narrows from the lower part to the upper part, and the first left reflection surface is formed on the left inclined surface, and the first right reflection surface is formed on the The right side inclined surface; and, the housing, which houses the 2N image sensors and the light reflecting structure inside, and a second left side reflecting surface opposite to the first left side reflecting surface is formed obliquely on the left wall At least a part, a second right reflection surface opposite to the first right reflection surface is obliquely formed on at least a part of the right wall, and a light entrance port defining a light path is formed on at least a part of the upper surface.

As an embodiment, it may be that the first left reflection surface is parallel to the second left reflection surface, and the first right reflection surface is parallel to the second right reflection surface.

As an embodiment, N image sensors of the 2N image sensors are arranged on the lower part of the second left reflection surface, and the remaining N image sensors are arranged on the second right reflection surface. Lower part.

As an embodiment, it may be that the image sensor package is closely attached to the lower surface of the display, and the light reflecting structure divides the light after passing through the light entrance into the second left reflecting surface and the The second right reflective surface.

As an embodiment, the detection area on the lower surface of the display may be composed of 2N sub-detection areas arranged in 2×N, and the 2N image sensors respectively correspond to the 2N sub-detection areas.

As an embodiment, it may be that the first left reflection surface and the first right reflection surface are flat surfaces.

As an embodiment, it may be that the second left reflection surface and the second right reflection surface are flat surfaces.

As an embodiment, it may be that the second left reflection surface and the second right reflection surface are formed as N curved surfaces arranged in a horizontal direction.

As an embodiment, it may be that the first left reflection surface and the first right reflection surface are curved surfaces.

As an embodiment, it may be that the second left reflection surface and the second right reflection surface are flat surfaces.

As an embodiment, it may be that the second left side reflective surface and the second right side reflective surface are formed as N recessed reflective surfaces arranged in a horizontal direction.

As an embodiment, it may be that the second left reflection surface is a single concave reflection surface curved toward the left wall side, and the second right reflection surface is a single concave reflection surface curved toward the right wall side. surface.

As an embodiment, the image sensor package may further include: a third left reflective surface, which is obliquely arranged at a lower part of the second left reflective surface; and a fourth left reflective surface to be in line with the third left reflective surface The third right reflective surface is arranged obliquely at the lower part of the second right reflective surface; and the fourth right reflective surface is arranged obliquely with respect to the third right reflective surface. The side reflecting surfaces are arranged obliquely so that they face each other and are spaced apart in the horizontal direction.

As an embodiment, it may be that the housing includes an upper housing and a lower housing, the upper housing includes the second left reflective surface and the second right reflective surface, the lower housing It includes the third left reflection surface formed on at least a part of the left wall and the third right reflection surface formed on at least a part of the right wall.

As an embodiment, it may be that the third left reflection surface is parallel to the fourth left reflection surface, and the third right reflection surface is parallel to the fourth right reflection surface.

As an embodiment, the image sensor package may further include: a left side light shielding wall extending from the first left side reflective surface to the second left side reflective surface; and a right side light shielding wall extending from the first right side The reflecting surface extends from the second right reflecting surface.

As an embodiment, an optical lens may be further included, and the optical lens is arranged on the upper part of the 2N image sensors.

According to an aspect of the present invention, there is provided an image sensor package for realizing a large-area detection area. It may be that the image sensor package includes: a substrate configured with an image sensor having a predetermined incident angle range and a focal distance greater than the thickness of the image sensor package; and a unit reflection structure that provides a bent light path so as to The light in the predetermined incident angle range reaches the image sensor arranged at a position closer than the focal distance, wherein the unit reflection structure includes: a first reflecting surface arranged obliquely to reflect after coming out of the detection area Light incident to the inside; and, a second reflection surface is arranged obliquely so as to face the first reflection surface, and reflects the light from the first reflection surface toward the image sensor.

As an embodiment, it may be that the first reflective surface is parallel to the second reflective surface.

As an embodiment, the unit reflection structure may include: a body, which is optically transparent, and provides a light path through which light enters from the light incident surface; the light incident surface is formed on the upper surface of the body; The first reflecting surface is formed obliquely at the lower part of the light incident surface so as to face the light incident surface, and reflects light incident through the light incident surface; the second reflecting surface faces the light incident surface The first reflective surface is formed in parallel with the first reflective surface and reflects the light from the first reflective surface; and, the light exit surface is formed so as to face the second reflective surface where the light is incident. The lower part of the surface is for the light from the second reflecting surface to be emitted toward the image sensor.

As an embodiment, the image sensor package may include a pair of unit reflection structures, and the pair of unit reflection structures are configured such that the first reflection surfaces are opposite to each other and the light incident surfaces are located on the same plane.

As an embodiment, it may be that the image sensor package includes a pair of unit reflection structures, the pair of unit reflection structures are configured to connect the side surfaces of the first reflection surface and the second reflection surface opposite to each other and the The light incident surface is located on the same plane.

As an embodiment, the side surface connecting the first reflective surface and the second reflective surface may be formed obliquely.

Invention effect

The image sensor package according to the embodiment of the present invention can have a large detection area at a relatively low cost compared with the existing image sensor, and in particular, can have a physical size that can be installed in a portable electronic device.

Description of the drawings

In the following, the present invention will be explained with reference to the embodiments shown in the drawings. To help understanding, in all the drawings, the same constituent elements are given the same reference numerals. The structure shown in the drawings is an example for explaining the present invention, and is not used to limit the protection scope of the present invention. In particular, to help understand the invention, some constituent elements are exaggeratedly shown in the drawings. The drawings are used to help understand the invention. Therefore, it should be understood that the width or thickness of the components shown in the drawings may be different in actual implementation.

FIG. 1 is a diagram briefly showing the principle of an image sensor package.

Fig. 2 is a diagram schematically showing an example of a unit reflection structure.

FIG. 3 is a diagram schematically showing an image sensor package in which a large-area detection area is realized by using the unit reflection structure shown in FIG. 2.

FIG. 4 is a diagram schematically showing a structure for improving the quality of a sub-fingerprint image generated by an image sensor.

Fig. 5 is a diagram schematically showing another embodiment of the unit reflection structure.

FIG. 6 is a diagram schematically showing an image sensor package in which a large-area detection area is realized by using the unit reflection structure shown in FIG. 5.

FIG. 7 is a diagram schematically showing still another embodiment of the unit reflection structure.

FIG. 8 is a diagram schematically showing an image sensor package in which a large area detection area is realized by using the unit reflection structure shown in FIG. 7.

Fig. 9 is a diagram schematically showing still another embodiment of the unit reflection structure.

FIG. 10 is a diagram schematically showing an image sensor package in which a large-area detection area is realized by using the unit reflection structure shown in FIG. 9.

FIG. 11 is a diagram schematically showing still another embodiment of the unit reflection structure.

FIG. 12 is a diagram schematically showing an image sensor package in which a large area detection area is realized by using the unit reflection structure shown in FIG. 11.

FIG. 13 is a diagram schematically showing still another embodiment of the unit reflection structure.

FIG. 14 is a diagram schematically showing an image sensor package in which a large-area detection area is realized by using the unit reflection structure shown in FIG. 13.

FIG. 15 is a diagram schematically showing still another embodiment of the unit reflection structure.

FIG. 16 is a diagram schematically showing still another embodiment of the unit reflection structure.

FIG. 17 is a diagram schematically showing an image sensor package in which a large-area detection area is realized by using the unit reflection structure shown in FIG. 15 and FIG. 16.

Detailed ways

The present invention can add various modifications and can have various embodiments. Specific embodiments are shown in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes belonging to the idea and technical scope of the present invention. In particular, the functions, features, and embodiments described below with reference to the drawings can be implemented individually or in combination with other embodiments. Therefore, it should be noted that the scope of the present invention is not limited to the manner shown in the drawings.

On the other hand, regarding the terms used in this specification, expressions such as "substantially", "almost", and "about" are expressions that take into account the allowable margins or possible errors in actual implementation. . For example, "substantially 90 degrees" should be interpreted as including angles that can obtain the same effects as those at 90 degrees. As another example, "almost no" should be interpreted as including to the extent that even if there is a little, it can be ignored.

On the other hand, unless otherwise specified, "side" or "horizontal" is used to indicate the left-right direction of the drawing, and "vertical" is used to indicate the up-down direction of the drawing. In addition, unless otherwise defined, the angle, incident angle, etc. are based on a virtual straight line perpendicular to the horizontal plane shown in the drawing.

Throughout the drawings, the same or similar elements are referenced with the same reference signs.

FIG. 1 is a diagram briefly showing the principle of an image sensor package.

2N (where N is a natural number) image sensors 130 may be configured in the image sensor package 100. Wherein, the image sensor 130 may be a packaged image sensor or an unpackaged image sensor. The image sensor package 100 may be arranged in the lower part of the display 11. The electronic device 10 includes a display panel and a cover glass arranged on the upper part of the display panel and protecting the display panel (the display panel and the cover glass are collectively referred to as the display 11 below). The image sensor package 100 can detect the panel light (hereinafter referred to as reflected light) that is reflected by the upper surface of the cover glass and then travels toward the display panel among the light generated by the display panel (hereinafter referred to as panel light). The display panel can open a combination of R, G, and B pixels to generate panel light that illuminates the subject. Among them, the panel light may be visible light. For example, the panel light may be visible light belonging to a specific light band, green or blue light band.

The 2N image sensors 130 arranged in the image sensor package 100 can generate a fingerprint image of a finger touching the upper surface of the display 11. At least a part of the panel light generated by the display panel advances toward the cover glass. When the ridge line of the fingerprint touches the cover glass, part of the panel light reaching the contact point of the cover glass-ridge line is absorbed by the ridge line. Conversely, the panel light reaching the point corresponding to the valley line of the fingerprint is reflected toward the lower surface 11 b of the display 11. Among them, the reflected light reaches the image sensor 130 through the lower surface 11 b of the display 11. The reflected light reaches the image sensor 130 at various angles. The reflected light from the location corresponding to the valley line of the fingerprint is relatively bright, and the reflected light from the location corresponding to the ridge line of the fingerprint is relatively dark. Therefore, the fingerprint image generated by the image sensor 130 may have a relatively dark pattern corresponding to the ridge of the fingerprint displayed on a brighter background overall.

The unit reflection structure 100 ′ provides a bent light path 15 through which the reflected light passes in order to reach the image sensor 130. 1(a) shows the light path 14 toward the image sensor 130 having a focal length greater than the thickness t _{max of the} electronic device 10, and FIG. 1(b) shows the light path 14 passing through the unit reflection structure 100' The light path 15 being bent. The image sensor 130 can detect light belonging to a specific incident angle range θ _{incident angle} . Therefore, as the focus F moves away from the subject, the area of the detection area 13' corresponding to one image sensor increases. However, within the electronic device 10, the separation distance between the image sensor and the upper surface of the display is limited by the thickness t _max of the electronic device, so it is impossible to ensure the minimum focal distance required by the image sensor, or even if The focal distance, the area of the detection area 13 ′ that the image sensor 130 can detect will also be greatly reduced. The unit reflection structure 100' bends the light path 14 through a plurality of reflection surfaces 110, 120, thereby being able to maintain the focal distance of the image sensor 130, and the separation distance between the image sensor and the upper surface of the display is greater than the thickness of the electronic device t _{max is} small.

The focal distance of the image sensor 130 can be maintained by the unit reflection structure 100 ′, but the contact area 12 ′ and the detection area 13 ′ corresponding thereto are still limited by the thickness t _max of the electronic device 10. To solve this problem, the image sensor package 100 includes a plurality of unit reflection structures 100'. Referring to (c) of FIG. 1, each of the 2N image sensors 130 arranged in the image sensor package 100 corresponds to a part of the detection area 13. In detail, the detection area 13 of the lower surface 11b of the display 11 is composed of 2N sub-detection areas 13' arranged in 2×N. According to the position where the image sensor package 100 is fixed, the contact area 12 may be defined on the upper surface 11 a of the display 11. The detection area 13 may be defined on the lower surface 11b corresponding to the contact area 12. The detection area 13 is an area where the light reflected by the contact area 12 is emitted from the display 11.

By arranging the unit reflection structure 100' such that two or more sub-detection regions 13' are in contact with each other, the detection region 13 can be enlarged. Each of the 2N image sensors 130 can maintain a specific focal distance, and therefore can substantially eliminate The fingerprint image corresponding to the sub-detection area 13' is distortedly generated. In order to realize a structure that can ensure sufficient space in the lower part of the display, an optical lens can be arranged between the image sensor and the display to expand the detection area. However, light incident through the peripheral portion of the optical lens may cause a distorted image.

Fig. 2 is a diagram schematically showing an example of a unit reflection structure.

The unit reflection structure 101 can reduce the thickness of the image sensor package, and if a plurality of unit reflection structures 101 are used, a large-area detection area can be realized. For reference, in the drawings including FIG. 2, in order to show the optical path of the reflected light, the sub-detection area 13c is shown separated from the first reflecting surface. Among them, the reflective surface refers to an effective surface that actually reflects light, and the unit reflective structure 101 includes a first reflective surface 111 and a second reflective surface 121 that are arranged oppositely. The first reflecting surface 111 is obliquely arranged at the lower part of the sub-detection area 13c, and the second reflecting surface 121 and the first reflecting surface 111 are arranged horizontally apart from each other. The first reflection surface 111 and the second reflection surface 121 are flat surfaces. The area of the first reflective surface 111 may be the same as or larger than the area of the second reflective surface 121. As an embodiment, the first reflective surface 111 and the second reflective surface 121 may be parallel. As another embodiment, the angle between the first reflective surface 111 and the second reflective surface 121 may not be zero.

When considering the viewing angle of the image sensor 130, the width of the light path 15 may decrease as it goes from the sub-detection area 13c toward the image sensor 130. If the sub-detection area 13c is assumed to be a horizontally arranged rectangular shape, the first reflection surface 111 is arranged obliquely toward the sub-detection area 13c, so the angle between the sub-detection area 13c and the first reflection surface 111 is an acute angle. The shape of 111 can be quadrilateral or inverted trapezoid. The lateral side 111' of the first reflective surface 111 may be adjacent to or located near the sub-detection area 13c, so the size of the lateral side 111' of the first reflective surface 111 can be the same as the size of the lateral side 13c' of the sub-detection area 13c Or smaller than the horizontal side 13c' of the sub-detection area 13c, the vertical side 111" of the first reflective surface 111 may be the same size as the vertical side 13c" of the sub-detection area 13c or larger than the vertical side of the sub-detection area 13c. 13c" is large. On the other hand, the second reflective surface 121 is arranged to face the first reflective surface 111, so the angle between the second reflective surface 121 and the sub-detection area 13c is an obtuse angle. The shape can be quadrilateral or inverted trapezoid. The second reflecting surface 121 and the first reflecting surface 111 are spaced apart in the horizontal direction, so the horizontal side 121' and the vertical side 121" can be larger than the horizontal side 111 of the first reflecting surface 111. 'And the vertical side 111" is small.

The first reflective surface 111 reflects the light from the sub-detection area 13 c toward the second reflective surface 121, and the second reflective surface 121 reflects toward the image sensor 130. The end surface 131 of the light path 15 reaching the image sensor 130 through the bending of the first reflective surface 111 and the second reflective surface 121 may be substantially the same shape as the sub-detection area 13c.

FIG. 3 is a diagram schematically showing an image sensor package that uses the unit reflection structure shown in FIG. 2 to realize a large area detection area. FIG. 3(a) shows a cross-section of the image sensor package, and FIG. 3(b) is Split perspective view of the image sensor package.

The detection area 13 can be doubled by connecting a pair of unit reflection structures 101L, 101R. As shown in FIG. 3(a), a pair of unit reflection structures 101L, 101R may be configured such that the upper end of the first left reflection surface 111L is connected to the upper end of the first right reflection surface 111R. In detail, the pair of unit reflection structures 101L and 101R are symmetrical. On the other hand, the N-pair unit reflection structure 101 may be continuously arranged in the horizontal direction. In detail, referring again to FIG. 2, the N pairs of unit reflection structures 101 are arranged along the direction of the lateral side 111 ′ of the first inclined surface 111. Therefore, in the image sensor package 100 in which the N pairs of unit reflection structures 101 are arranged in the horizontal direction, the length of the lateral sides of the first left reflective surface 111L and the first right reflective surface 111R may be the same as that of the first inclined surface 111. N times the length of 111 ′ is the same or greater than N times the length of the lateral side 111 ′ of the first inclined surface 111. On the other hand, the length of the lateral sides of the second left reflection surface 121L and the second right reflection surface 121R may be the same as the length of the first left reflection surface 111L or smaller than the length of the first left reflection surface 111L.

Although not shown, as an example, in the first left reflection surface 111L, the first right reflection surface 111R, the second left reflection surface 121L, and the second right reflection surface 121R, except for the light path area The area can be coated with light-absorbing material. Among them, the light path area is an effective reflection surface where light incident on the image sensor 130 is reflected, and the area other than the light path is an invalid reflection surface where light not incident on the image sensor 130 is reflected. As another embodiment, in the first left reflection surface 111L and the first right reflection surface 111R, the area other than the light path may be different from the first left reflection surface 111L and the first right reflection surface 111R. The angle is inclined. Similarly, in the second left reflection surface 121L and the second right reflection surface 121R, the area other than the light path may be inclined at a different angle from the second left reflection surface 121L and the second right reflection surface 121R .

The image sensor package 100 may include a housing 140, a light reflecting structure 152 and a base 150. A light reflecting structure 152 is arranged on the upper surface 151 of the base 150. The 2×2 image sensors 130L and 130R may be arranged in a row on the left and right of the light reflecting structure 152. The cross section of the light reflection structure 152 has a shape in which the width gradually narrows from the lower part to the upper part, and may be a triangle or a cone, for example. Therefore, the left oblique surface of the light reflection structure 152 is the first left reflection surface 111L that reflects the light from the left sub-detection areas 130c, 130d, and the right oblique surface of the light reflection structure 152 is The first right reflection surface 111R on which the light of the detection regions 130a and 130b is reflected. The angle θ ₁ between the first left reflective surface 111L and the first right reflective surface 111R and the detection area is an acute angle.

A second left reflection surface 121L is formed on the left wall 140L of the housing 140, and a second right reflection surface 121R is formed on the right wall 140R. As an embodiment, the second left side reflection surface 121L may be formed on at least a part of the left wall 140L. In detail, the left wall 140L may include a left wall inner upper surface 143L, a left wall lower surface 144L closer to the left than the left wall inner upper surface 143L, and a lower end connected to the left wall inner upper surface 143L and the left wall lower surface 144L The second left reflection surface 121L at the upper end. Similarly, the right wall 140R may include a right wall inner upper surface 143R, a right wall lower surface 144R closer to the right than the right wall inner upper surface 143R, and a lower end connected to the right wall inner upper surface 143R and the right wall lower surface 144R. The second right reflective surface 121R at the upper end. The angle θ ₂ between the second left reflection surface 121L and the second right reflection surface 121R and the detection area is an obtuse angle. The light incident port 142 is formed on the upper surface 141 of the housing 140 in a manner corresponding to the detection area 13.

The N image sensors 130L may be arranged under the second left reflective surface 121L, and the N image sensors 130R may be arranged under the second right reflective surface 121R. That is, the plurality of image sensors 130L, 130R are covered by the upper surface 141 of the housing 140, so that light from the periphery of the detection area 13 does not enter the plurality of image sensors 130L, 130R. As shown in Fig. 3(b), the two image sensors 130L arranged on the left can detect light from the sub-detection areas 13a and 13b of the display 11 and generate sub-fingerprint images. The two image sensors 130R arranged on the right It is possible to detect light from the sub-detection areas 13c and 13d of the display 11 and generate a sub-fingerprint image.

FIG. 4 is a diagram schematically showing a structure for improving the quality of a sub-fingerprint image generated by an image sensor. The description overlapping with FIG. 3 is omitted, and the difference is mainly described.

The image sensor package 100 may include a left side light shielding wall 160L and a right side light shielding wall 160R. The left light shielding wall 160L can optically separate the multiple image sensors arranged on the left side, and the right light shielding wall 160R can optically separate the multiple image sensors arranged on the right side. As shown in FIG. 4, the first sub-detection area 13a, the second sub-detection area 13b, the third sub-detection area 13c, and the fourth sub-detection area 13d can be optically separated substantially by the light reflection structure 152. Therefore, the light from the third sub-detection area 13c and the fourth sub-detection area 13d cannot actually reach the two image sensors 160L arranged on the left, and the light from the first sub-detection area 13a and the second sub-detection area 13b actually The two image sensors 160R arranged on the right side cannot be reached. On the other hand, the light from the first sub-detection area 13a can reach the image sensor corresponding to the second sub-detection area 13b, and the light from the second sub-detection area 13b can reach the image sensor corresponding to the first sub-detection area 13a. The left light shielding wall 160L blocks light incident from the non-corresponding sub-detection area, thereby enabling optical separation of a plurality of image sensors arranged on the left side, and the right light shielding wall 160R blocks the non-corresponding sub-detection area The incident light can optically separate a plurality of image sensors arranged on the right side in parallel. The left side light shielding wall 160L may extend from the first left side inclined surface 111L to the second left side inclined surface 121L, and the right side light shielding wall 160R may extend from the first right side inclined surface 111R to the second right side inclined surface 121R .

The image sensor package 100 may include optical lenses 170L and 170R arranged on the upper portion of the image sensor 130. The optical lenses 170L and 170R can collect the light incident on the image sensor 130 on the light receiving part of the image sensor.

Fig. 5 is a diagram schematically showing another embodiment of the unit reflection structure. The description overlapping with FIG. 2 is omitted, and the difference is mainly described.

The unit reflection structure 102 can reduce the thickness of the image sensor package, and if a plurality of unit reflection structures 102 are used, a large-area detection area can be realized. The unit reflection structure 102 includes a first reflection surface 112 and a second reflection surface 122 oppositely arranged. The first reflection surface 122 is obliquely arranged at the lower part of the sub-detection area 13c, and the second reflection surface 122 and the first reflection surface 112 are arranged horizontally apart from each other. The first reflective surface 112 is a curved surface, and the second reflective surface 122 is a flat surface. That is, the first reflective surface 112 is a concave reflective surface curved with respect to the first virtual plane 112p defined by the first to fourth corners 112a to 112d of the first reflective surface 112, and will deviate from the first virtual plane in the vertical direction. The straight line connecting the multiple points on the first reflective surface 112 that is furthest from the plane 112p may be parallel to the longitudinal centerline 112p' of the first virtual plane 112p. As an embodiment, the first virtual plane 112p and the second reflective surface 122 may be parallel. As another embodiment, the angle between the first virtual plane 112p and the second reflective surface 122 may not be zero.

When considering the viewing angle of the image sensor 130, the width of the light path 15 may gradually decrease from the sub-detection area 13c toward the image sensor 130. If the sub-detection area 13c is assumed to be a horizontally arranged rectangular shape, the first reflecting surface 112 is a concave reflecting surface arranged obliquely toward the sub-detection area 13c, so the angle between the sub-detection area 13c and the first virtual plane 112p is an acute angle The shape of the first virtual plane 112p may be a quadrilateral or an inverted trapezoid. The horizontal edges 112a-112b of the first virtual plane 112p may be connected to or located near the sub-detection area 13c, so the size of the horizontal edges 112a-112b of the first virtual plane 112p may be the same as the horizontal edge 13c' of the sub-detection area 13c. The size is the same or smaller than the size of the horizontal side 13c' of the sub-detection area 13c. The size of the vertical sides 112a-112c, 112b-112d of the first virtual plane 112p may be the same as or smaller than the size of the vertical side 13c" of the sub-detection area 13c. The size of the vertical side 13c" of the sub-detection area 13c is large. On the other hand, the second reflective surface 122 is arranged to face the first reflective surface 112, so the angle between the second reflective surface 122 and the sub-detection area 13c is an obtuse angle, and the shape of the second reflective surface 122 can be quadrilateral or inverted. Trapezoid. The second reflecting surface 122 and the first reflecting surface 112 are spaced apart from each other in the horizontal direction. Therefore, the size of the horizontal side 122' and the vertical side 122" can be larger than the vertical sides 112a-112c and the horizontal sides 112c-112d of the first virtual plane 112p. On the other hand, compared with the first reflective surface 111 of FIG. 2, the first reflective surface 112 is a curved concave reflective surface, so the light is more concentrated in the horizontal direction. Therefore, the horizontal side of the second reflective surface 122 The size of 122' may be the same as or smaller than the size of the horizontal side 121' of FIG. 2.

The first reflective surface 112 reflects the light from the sub-detection area 13 c toward the second reflective surface 122, and the second reflective surface 122 reflects toward the image sensor 130. The lateral width of the end surface 132 of the light path 15 that reaches the image sensor 130 through the bending of the first reflective surface 112 and the second reflective surface 122 may be smaller than the lateral width of the sub-detection area 13c.

6 is a diagram schematically showing an image sensor package in which a large area detection area is realized by using the unit reflection structure shown in FIG. 5, FIG. 6(a) shows a cross-section of the image sensor package, and FIG. 6(b) is Split perspective view of the image sensor package. The description overlapping with FIG. 3 is omitted, and the difference is mainly described.

The detection area 13 can be doubled by connecting a pair of unit reflection structures 102L and 102R. As shown in (a) of FIG. 6, a pair of unit reflection structures 102L, 102R may be configured such that the upper end of the first left reflection surface 112L is connected to the upper end of the first right reflection surface 112R. In detail, the pair of unit reflection structures 102L and 102R are symmetrical. On the other hand, the N-pair unit reflection structure 102 may be continuously arranged in the horizontal direction. 5 again, the N pairs of unit reflection structures 102 are arranged along the horizontal sides 112a-112b of the first virtual plane 112p.

Although not shown, as an example, in the first left reflection surface 112L, the first right reflection surface 112R, the second left reflection surface 122L, and the second right reflection surface 122R, except for the light path area The area can be coated with light-absorbing material. As another embodiment, in the first left reflection surface 112L and the first right reflection surface 112R, the area other than the light path may be different from the first left reflection surface 112L and the first right reflection surface 112R. The angle is inclined. Similarly, in the second left reflection surface 122L and the second right reflection surface 122R, the area other than the light path may be inclined at a different angle from the second left reflection surface 122L and the second right reflection surface 122R .

The cross section of the light reflection structure 152 may be triangular or conical. Therefore, the first left reflection surface 112L formed on the left inclined surface of the light reflection structure 152 and the first right reflection surface 112R formed on the right inclined surface are concave reflection surfaces that are curved toward the center of the light reflection structure 152 . Therefore, N concave reflective surfaces may be formed on the left inclined surface of the light reflection structure 152, and N concave reflective surfaces may be formed on the right inclined surface of the light reflection structure 152.

A second left side reflection surface 122L is formed on the left wall 140L of the housing 140, and a second right side reflection surface 122R is formed on the right wall 140R. As an embodiment, the second left reflective surface 122L may be formed on at least a part of the left wall 140L, and the second right reflective surface 122R may be formed on at least a part of the right wall 140R. When compared with FIG. 3, the area of the second left reflection surface 122L and the second right reflection surface 122R may be the same as or larger than the area of the second left reflection surface 121L and the second right reflection surface 121R. The reflective surface 121L and the second right reflective surface 121R have small areas.

FIG. 7 is a diagram schematically showing still another embodiment of the unit reflection structure. The description overlapping with FIG. 2 and FIG. 5 is omitted, and the difference is mainly described.

The unit reflection structure 103 can reduce the thickness of the image sensor package, and if a plurality of unit reflection structures 103 are used, a large area detection area can be realized. The unit reflection structure 103 includes a first reflection surface 111 and a second reflection surface 123 oppositely arranged. The first reflective surface 111 is a flat surface, and the second reflective surface 123 is a curved surface. That is, the second reflective surface 123 is a concave reflective surface curved with respect to the second virtual plane 123p defined by the first to fourth corners of the second reflective surface 123, namely 123a to 123d, and will be separated from the second virtual plane in the vertical direction. The straight line connecting the multiple points on the second reflecting surface 123 furthest from the plane 123p may be parallel to the longitudinal centerline 123p' of the second virtual plane 123p. As an embodiment, the first reflective surface 111 and the second virtual plane 123p may be parallel. As another embodiment, the angle between the first reflective surface 111 and the second virtual plane 123p may not be zero.

If the sub-detection area 13c is assumed to be a horizontally arranged rectangular shape, the first reflection surface 111 is arranged obliquely toward the sub-detection area 13c, so the angle between the sub-detection area 13c and the first reflection surface 111 is an acute angle. The shape of 111 can be quadrilateral or inverted trapezoid. The second reflective surface 123 is disposed toward the first reflective surface 111, the angle between the second virtual plane 123p and the sub-detection area 13c is an obtuse angle, and the shape of the second virtual plane 123p may be a quadrilateral or an inverted trapezoid. On the other hand, compared with the second reflective surface 121 of FIG. 2, the second reflective surface 123 is a curved concave reflective surface, so the light is more concentrated in the horizontal direction. Therefore, the lateral width of the end surface 133 of the light path reaching the image sensor 130 through the bending of the first reflective surface 111 and the second reflective surface 123 may be smaller than the lateral width of the sub-detection area 13c.

FIG. 8 is a diagram schematically showing an image sensor package that uses the unit reflection structure shown in FIG. 7 to realize a large area detection area. FIG. 8(a) shows a cross-section of the image sensor package, and FIG. 8(b) is Split perspective view of the image sensor package. The description overlapping with FIG. 3 and FIG. 6 is omitted, and the difference is mainly described.

The detection area 13 can be doubled by connecting a pair of unit reflection structures 103L and 103R. As shown in (a) of FIG. 8, a pair of unit reflection structures 103L, 103R may be configured such that the upper end of the first left reflection surface 111L is connected to the upper end of the first right reflection surface 111R. In detail, the pair of unit reflection structures 103L and 103R are symmetrical. On the other hand, the N-pair unit reflection structure 103 may be continuously arranged in the horizontal direction.

A second left reflection surface 123L is formed on the left wall 140L of the housing 140, and a second right reflection surface 123R is formed on the right wall 140R. The second left reflection surface 123L is a concave reflection surface curved to the left wall 140L side, and the second right reflection surface 123R is a concave reflection surface curved to the right wall 140R side. Therefore, N recessed reflective surfaces may be formed on the left wall 140L of the housing 140, and N recessed reflective surfaces may be formed on the right wall 140R.

Fig. 9 is a diagram schematically showing still another embodiment of the unit reflection structure. The description that overlaps with FIG. 2, FIG. 5, and FIG. 7 is omitted, and the difference is mainly described.

The unit reflection structure 104 can reduce the thickness of the image sensor package, and if multiple unit reflection structures 104 are used, a large area detection area can be realized. The unit reflection structure 104 includes a first reflection surface 112 and a second reflection surface 124 oppositely arranged. The first reflective surface 112 and the second reflective surface 124 are curved surfaces. That is, the first reflective surface 112 is a concave reflective surface curved with respect to the first virtual plane 112p defined by the first to fourth corners 112a to 112d of the first reflective surface 112, and will deviate from the first virtual plane in the vertical direction. The straight line connecting the multiple points on the first reflective surface 112 that is furthest from the plane 112p may be parallel to the longitudinal centerline 112p' of the first virtual plane 112p. On the other hand, the second reflective surface 124 is a concave reflective surface curved with respect to the second virtual plane 124p defined by the first to fourth corners of the second reflective surface 124, namely 124a to 124d, and will be separated from the first corner in the vertical direction. The straight line connecting the multiple points on the second reflecting surface 124 furthest from the two virtual planes 124p may be parallel to the longitudinal centerline 124p′ of the second virtual plane 124p. As an embodiment, the first virtual plane 112p and the second virtual plane 124p may be parallel. As another embodiment, the angle between the first virtual plane 112p and the second virtual plane 124p may not be zero.

If the sub-detection area 13c is assumed to be a horizontally arranged rectangular shape, the first reflecting surface 112 is a concave reflecting surface arranged obliquely toward the sub-detection area 13c, so the angle between the sub-detection area 13c and the first virtual plane 112p is an acute angle The shape of the first virtual plane 112p may be a quadrilateral or an inverted trapezoid. The second reflective surface 124 is disposed toward the first reflective surface 112, the angle between the second virtual plane 124p and the sub-detection area 13c is an obtuse angle, and the shape of the second virtual plane 124p may be a quadrilateral or an inverted trapezoid. On the other hand, compared with the second reflecting surface 123 of FIG. 7, since the light converging in the horizontal direction reaches the second reflecting surface 124 from the first reflecting surface 112, the size of the lateral sides 124a-124b of the second virtual plane 124p is The size may be the same as or smaller than the size of the lateral sides 123a-123b of the second virtual plane 123p.

The first reflective surface 112 reflects the light from the sub-detection area 13 c toward the second reflective surface 124, and the second reflective surface 124 reflects toward the image sensor 130. The lateral width of the end surface 134 of the light path that reaches the image sensor 130 through the bending of the first reflective surface 112 and the second reflective surface 124 may be smaller than the lateral width of the sub-detection area 13c.

FIG. 10 is a diagram schematically showing an image sensor package that uses the unit reflection structure shown in FIG. 9 to realize a large area detection area. FIG. 10(a) shows a cross-section of the image sensor package, and FIG. 10(b) is Split perspective view of the image sensor package. The descriptions that overlap with those in FIG. 3, FIG. 6 and FIG. 8 are omitted, and the differences are mainly described.

The detection area 13 can be doubled by connecting a pair of unit reflection structures 104L and 104R. As shown in (a) of FIG. 10, a pair of unit reflection structures 104L and 104R may be configured such that the upper end of the first left reflection surface 112L and the upper end of the first right reflection surface 112R are connected. In detail, the pair of unit reflection structures 104L and 104R are symmetrical. On the other hand, the N pairs of unit reflection structures 104 may be continuously arranged in the horizontal direction.

The cross section of the light reflection structure 152 may be triangular or conical. Therefore, the first left reflection surface 114L formed on the left inclined surface of the light reflection structure 152 and the first right reflection surface 112R formed on the right inclined surface are concave reflection surfaces that are curved toward the center of the light reflection structure 152 . Therefore, it may be that N recessed reflective surfaces are formed on the left side inclined surface of the light reflection structure 152, and N recessed reflective surfaces are formed on the right side inclined surface.

A second left reflection surface 124L is formed on the left wall 140L of the housing 140, and a second right reflection surface 124R is formed on the right wall 140R. The second left reflection surface 124L is a concave reflection surface curved to the left wall 140L side, and the second right reflection surface 124R is a concave reflection surface curved to the right wall 140R side. Therefore, it may be that N concave reflective surfaces are formed on the left wall 140L of the housing 140, and N concave reflective surfaces are formed on the right wall 140R.

FIG. 11 is a diagram schematically showing still another embodiment of the unit reflection structure. The description overlapping with FIG. 9 is omitted, and the difference is mainly described.

The unit reflection structure 105 can reduce the thickness of the image sensor package, and if a plurality of unit reflection structures 105 are used, a large area detection area can be realized. The unit reflection structure 105 includes a first reflection surface 112 and a second reflection surface 125 oppositely arranged. The first reflective surface 112 and the second reflective surface 125 are concave reflective surfaces. The second reflecting surface 124 is a concave reflecting surface curved with respect to the second virtual plane 125p defined by the first to fourth corners of the second reflecting surface 125, namely 125a to 125d, and will be separated from the second virtual plane 125p in the horizontal direction. The straight line connecting the multiple points on the farthest second reflecting surface 125 may be parallel to the lateral center line 125p′ of the second virtual plane 125p. As an embodiment, the first virtual plane 112p and the second virtual plane 125p may be parallel. As another embodiment, the angle between the first virtual plane 112p and the second virtual plane 125p may not be zero. The light reflected by the first reflection surface 112 converges in the horizontal direction and reaches the second reflection surface 125, and the light reflected by the second reflection surface 125 converges in the vertical direction and reaches the image sensor 130.

FIG. 12 is a diagram schematically showing an image sensor package that uses the unit reflection structure shown in FIG. 11 to realize a large area detection area. FIG. 12(a) shows a cross-section of the image sensor package, and FIG. 12(b) is Split perspective view of the image sensor package. The description overlapping with FIG. 3, FIG. 6, FIG. 8, and FIG. 10 is omitted, and the difference is mainly described.

The detection area 13 can be doubled by connecting a pair of unit reflection structures 105L, 105R. As shown in (a) of FIG. 12, a pair of unit reflection structures 105L, 105R may be configured such that the upper end of the first left reflection surface 112L and the upper end of the first right reflection surface 112R are connected. In detail, the pair of unit reflection structures 105L, 105R are symmetrical. On the other hand, the N-pair unit reflection structure 105 may be continuously arranged in the horizontal direction.

The cross section of the light reflection structure 152 may be triangular or conical. Therefore, the first left reflection surface 114L formed on the left inclined surface of the light reflection structure 152 and the first right reflection surface 112R formed on the right inclined surface are concave reflection surfaces that are curved toward the center of the light reflection structure 152 . Therefore, it may be that N recessed reflective surfaces are formed on the left side inclined surface of the light reflection structure 152, and N recessed reflective surfaces are formed on the right side inclined surface.

A second left reflection surface 125L is formed on the left wall 140L of the housing 140, and a second right reflection surface 125R is formed on the right wall 140R. The second left reflection surface 125L may be a single concave reflection surface curved to the left wall 140L side, and the second right reflection surface 125R may be a single concave reflection surface curved to the right wall 140R side.

FIG. 13 is a diagram schematically showing still another embodiment of the unit reflection structure.

The unit reflection structure 106 provides a bent light path 15 through which the reflected light passes in order to reach the image sensor 130. The unit reflection structure 106 can reduce the thickness of the image sensor package, and if a plurality of unit reflection structures 106 are used, a large area detection area can be realized. Compared with the structures illustrated in FIGS. 2 to 12, the unit reflection structure 106 further includes a third reflection surface 183 and a fourth reflection surface 184. The third reflecting surface 183 is arranged obliquely below the second reflecting surface 121 so as to be opposite to the second reflecting surface 121. The fourth reflecting surface 184 is opposite to the third reflecting surface 183 and horizontally opposite to the third reflecting surface 183. Obliquely arranged in a separated manner. The area of the third reflective surface 183 may be the same as or smaller than the area of the second reflective surface 121, and the area of the fourth reflective surface 184 may be the same as or more reflective than that of the third reflective surface 183. The area of the surface 183 is small. As an embodiment, the third reflective surface 183 and the fourth reflective surface 184 may be parallel. As another embodiment, the angle between the third reflective surface 183 and the fourth reflective surface 184 may not be zero. On the other hand, although not shown, one or more of the first to fourth reflection surfaces 111, 121, 183, and 134 may be curved surfaces.

When considering the viewing angle of the image sensor 130, the width of the light path 15 may gradually decrease from the sub-detection area 13c toward the image sensor 130. If the sub-detection area 13c is assumed to be a horizontally arranged rectangular shape, since the third reflecting surface 183 and the second reflecting surface 121 are arranged opposite to each other, the angle between the sub-detection area 13c and the third reflecting surface 183 is an acute angle. The shape of the reflective surface 183 may be quadrilateral or inverted trapezoid. Since the fourth reflection surface 184 and the third reflection surface 183 are arranged oppositely, the angle between the sub-detection area 13c and the fourth reflection surface 184 is an obtuse angle, and the shape of the fourth reflection surface 184 may be a quadrilateral or an inverted trapezoid.

FIG. 14 is a diagram schematically showing an image sensor package in which a large area detection area is realized by using the unit reflection structure shown in FIG. 13, FIG. 14(a) shows a cross section of the image sensor package, and FIG. 14(b) is Split perspective view of the image sensor package.

The detection area 13 can be doubled by connecting a pair of unit reflection structures 106L, 106R. As shown in (a) of FIG. 14, a pair of unit reflection structures 106L, 106R may be configured such that the upper end of the first left reflection surface 111L and the upper end of the first right reflection surface 111R are connected. In detail, the pair of unit reflection structures 106L and 106R are symmetrical. On the other hand, the N pairs of unit reflection structures 106L, 106R may be continuously arranged in the horizontal direction.

The image sensor package 100 may include an upper housing 140, a light reflecting structure 152, a lower housing 180, and a base 150. An image sensor 130 is arranged on the upper surface 151 of the base 150. There may be more than one image sensor 130. The third left reflection surface 183L and the third right reflection surface 183R, the fourth left reflection surface 184L and the fourth right reflection surface 184R make the focus of the light from the detection area 13 formed at the lower part of the light reflection structure 152. In particular, according to the combination of the distance and the inclination angle between the third left reflection surface 183L and the third right reflection surface 183R and/or the distance between the fourth left reflection surface 184L and the fourth right reflection surface 184R In addition to the tilt angle, the focus of the light passing through the left unit reflection structure 106L and the right unit reflection structure 106R may be formed to be relatively closer than the case shown in FIGS. 1 to 12 or substantially the same. Therefore, a plurality of image sensors with a smaller light-receiving part area may be arranged under the fourth left reflection surface 184L and the fourth right reflection surface 184R, or an image sensor with a larger light-receiving part area may be arranged on the first The lower part of the fourth left reflection surface 184L and the fourth right reflection surface 184R.

The first left reflection surface 111L and the first right reflection surface 111R are arranged in the upper housing 140 so as to face the second left reflection surface 121L and the second right reflection surface 121R, respectively. The second left reflection surface 121L and the second right reflection surface 121R are respectively formed on the left wall 140L and the right wall 140R of the upper housing 140. The third left reflection surface 183L and the third right reflection surface 183R are formed on the left wall 180L and the right wall 180R of the lower housing 180, respectively. The fourth left reflection surface 184L and the fourth right reflection surface 184R are arranged in the lower housing 180 so as to face the third left reflection surface 183L and the third right reflection surface 183R, respectively. The angle θ ₃ between the third left reflection surface 183L and the third right reflection surface 183R and the detection area is an acute angle, and the angle θ between the fourth left reflection surface 184L and the fourth right reflection surface 184R and the detection area ₄ is an obtuse angle.

The first light entrance port 142 is formed on the upper surface 141 of the housing 140 in a manner corresponding to the detection area 13. The second left light entrance 182L through which the light reflected by the second left reflection surface 121L passes is formed on the left side of the upper surface 181 of the lower housing 180, and the light reflected by the second right reflection surface 121R passes through The second right light incident port 182R is formed on the right side of the upper surface 181.

FIG. 15 is a diagram schematically showing another embodiment of the unit reflection structure. FIG. 15(a) shows the cross section, front, back, upper surface, and bottom surface of the unit reflection structure, and FIG. 15(b) is the unit reflection Three-dimensional view of the structure. 3, 6, 8 and 10 are omitted, and the differences are mainly described.

15 (a) and (b), the unit reflection structure 107 includes an optically transparent body 1071 with a polygonal cross section. The body 1071 may have a refractive index different from that of air. The body 1071 provides a light path through which light incident to the inside passes, and the light path is bent at least twice. The image sensor configured in the image sensor package 100 may receive light belonging to a predetermined incident angle range, and may have a predetermined focal distance. The focal distance of the image sensor may be greater than the thickness of the image sensor package 100. The body 1071 bends the light path of the light incident inside the body 1071 so that the light within a predetermined incident angle range can reach the image sensor arranged in the image sensor package 100. Even if the maximum distance between the image sensor and the detection area is limited within the thickness of the image sensor package 100, the bent light path can still collect light in the predetermined incident angle range on the image sensor.

The body 1071 has multiple surfaces, and the multiple surfaces include a light incident surface 1072, a first reflective surface 111, a second reflective surface 121, and a light exit surface 1073. The light incident surface 1072 may be in contact with the detection area or located at the lower part of the detection area. The light exit surface 1073 may be located on the upper part of the image sensor. More than one image sensor may be arranged under the light exit surface 1073. When viewed from the upper surface of the unit reflection structure 107, the multiple effective areas on the light incident surface 1072 and the light exit surface 1703 through which the light of the predetermined incident angle range passes may not overlap with each other. For example, the light incident surface 1072 and the light exit surface 1703 may be substantially parallel planes.

The first reflection surface 111 is formed obliquely below the light incident surface 111. When viewed from the upper surface of the unit reflection structure 107, at least a part of the plurality of effective areas on the first reflection surface 111 and the light incident surface 1072 through which the light of the predetermined incident angle range passes may overlap. The first reflective surface 111 reflects the light that enters the body 1071 through the light incident surface 111 and falls within a predetermined incident angle range, and makes it face the second inclined surface 121. The first reflective surface 111 may be a flat surface or a curved surface. As an embodiment, the entire first reflective surface 111 may be coated with a material that reflects light to reflect light. As another embodiment, at least a part of the first reflective surface 111 may be coated with a material that reflects light to reflect light. That is, it may be that only the effective reflection area reached by the light falling within the predetermined incident angle range is coated with a light-reflecting substance, and the remaining area is not coated with a light-reflecting substance or coated with a light-absorbing substance.

The second reflection surface 121 is formed obliquely so as to face the first reflection surface 111. For example, the second reflection surface 121 may extend obliquely from one side of the light incident surface 1072. The second reflection surface 121 reflects the light within a predetermined incident angle range from the first reflection surface 111 and makes it face the light exit surface 1073. The second reflective surface 121 may be a flat surface or a curved surface. As an embodiment, the entire second reflective surface 121 may be coated with a material that reflects light to reflect light. As another embodiment, at least a part of the second reflective surface 121 may be coated with a material that reflects light to reflect light. That is, it may be that only the effective area 1211 reached by light falling within the predetermined incident angle range is coated with a light-reflecting substance, and the remaining area is not coated with a light-reflecting substance or coated with a light-absorbing substance.

The light exit surface 1073 is formed under the second reflective surface 121. When viewed from the upper surface of the unit reflection structure 107, at least a part of the plurality of effective areas on the second reflection surface 121 and the light exit surface 1073 through which the light of the predetermined incident angle range passes may overlap. One or more image sensors may be arranged under the light exit surface 1073. Two or more image sensors can be spaced apart in the horizontal direction. In addition, an optical lens (170R, 170L in FIG. 4) may be arranged between the light exit surface 1073 and the image sensor.

16 is a diagram schematically showing another embodiment of the unit reflection structure, FIG. 16 (a) shows the cross section, front, back, upper surface and bottom surface of the unit reflection structure, and FIG. 16 (b) is the unit reflection Three-dimensional view of the structure. The descriptions that overlap with those in FIG. 3, FIG. 6, FIG. 8, FIG. 10, and FIG. 15 are omitted, and differences are mainly described.

Referring to (a) and (b) of FIG. 16, the unit reflection structure 108 includes an optically transparent body 1081 with a polygonal cross section. The body 1081 has multiple surfaces, and the multiple surfaces include a light incident surface 1082, a first reflective surface 111, a second reflective surface 121, and a light exit surface 1183. Compared with FIG. 15, the area of the second reflective surface 121 can be reduced to substantially the same area as the effective area 1211 of FIG. 15. For example, light belonging to a predetermined incident angle range can reach the second reflecting surface 121, but light other than that cannot reach the second reflecting surface 121 substantially. As an embodiment, the side surfaces 1084 and 1085 of the unit reflection structure 108 may be inclined surfaces. The side surfaces 1084 and 1085 may extend from the oblique side of the first reflective surface 111 toward the effective area on the second inclined surface 121. Due to the inclined side surfaces 1084 and 1085, the light incident surface 1082 and the light exit surface 1083 can have a tapered shape whose width decreases from the first reflection surface 111 to the second reflection surface 121. As another embodiment, although not shown, the remaining area of the second inclined surface 121 except for the effective area may be a plane inclined at a different angle from the effective area.

FIG. 17 is a diagram schematically showing an image sensor package that uses the unit reflection structure shown in FIG. 15 and FIG. 16 to realize a large area detection area, and FIG. 17(a) is an image sensor package including the unit reflection structure of FIG. 15 An exploded perspective view. (b) of FIG. 17 is an exploded perspective view of the image sensor package including the unit reflection structure of FIG. 16.

By arranging the light incident surfaces 1072 and 1082 of the plurality of unit reflection structures 107 and 108 on the same plane, a large detection area can be realized. For example, a pair of unit reflection structures 107a, 107d may be configured such that the first reflection surface 111 is opposite to each other, or a pair of unit reflection structures 107a, 107b may be configured such that the side surfaces connecting the first reflection surface 111 and the second reflection surface 121 are opposite to each other. In this way, the four unit reflection structures 107a, 107b, 107c, and 107d can be arranged such that the light incident surfaces 1072 are in contact with each other and are substantially located on the same plane. In the same way, the four unit reflection structures 108a, 108b, 108c, and 108d can also be configured such that the light incident surface 1082 is substantially on the same plane.

On the other hand, the unit reflection structures 107 and 108 may extend in a direction perpendicular to the cross section. If it extends in a direction perpendicular to the cross section, in addition to the expansion of the first reflection surface 111 and the second reflection surface 121, the light incident surfaces 1072, 1082 and the light exit surfaces 1073, 1083 are also expanded. Therefore, two or more image sensors can be arranged under the light exit surfaces 1073 and 1083.

The image sensor package 100 may include a housing 140, a light reflecting structure 152 and a base 150. One or more unit reflection structures 107a to 107d and 108a to 108d are arranged on the upper surface of the base 150. The light reflection structure 152 with a triangular or conical cross-section may be in contact with the first inclined surface 111 of the unit reflection structure 107a-107d or 108a-108d to support the unit reflection structure. In addition, the left and right inclined surfaces of the light reflecting structure 152 may be coated with a substance that reflects light. The housing 140 may house and support a plurality of unit reflection structures 107a to 107d or 108a to 108d and the light reflection structure 152 of the unit reflection structure inside.

It should be understood that the above description of the present invention is for exemplification, and those skilled in the art can easily transform it into other specific forms without changing the technical idea or essential features of the present invention. Therefore, the above-described embodiments are used for illustration in all aspects and not for limitation.

The protection scope of the present invention is shown by the following claims, rather than the above detailed description, and should be interpreted as all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts. It is included in the scope of the present invention.

Claims (23)

1. An image sensor package for realizing a large area detection area. The image sensor package includes:

   A base body, 2N image sensors are arranged on the base body spaced apart in the horizontal direction, where N is a natural number;

   The light reflection structure is arranged on the upper part of the base in a horizontally spaced manner from each of the 2N image sensors, the width of the light reflection structure gradually narrows from the bottom to the top, and the first left The side reflecting surface is formed on the left inclined surface, and the first right reflecting surface is formed on the right inclined surface; and

   The housing contains the 2N image sensors and the light reflection structure inside, and a second left reflection surface opposite to the first left reflection surface is formed obliquely on at least a part of the left wall, and is connected to the first left reflection surface. A second right reflection surface opposite to a right reflection surface is obliquely formed on at least a part of the right wall, and a light entrance port defining a light path is formed on at least a part of the upper surface.
2. The image sensor package according to claim 1, wherein:

   The first left reflection surface is parallel to the second left reflection surface, and the first right reflection surface is parallel to the second right reflection surface.
3. The image sensor package according to claim 1, wherein:

   Among the 2N image sensors, N image sensors are arranged under the second left reflection surface, and the remaining N image sensors are arranged under the second right reflection surface.
4. The image sensor package according to claim 1, wherein:

   The image sensor package is closely attached to the lower surface of the display,

   The light reflection structure divides the light passing through the light entrance port into the second left reflection surface and the second right reflection surface.
5. The image sensor package of claim 4, wherein:

   The detection area on the lower surface of the display is composed of 2N sub-detection areas arranged in 2×N, and the 2N image sensors respectively correspond to the 2N sub-detection areas.
6. The image sensor package according to claim 1, wherein:

   The first left reflection surface and the first right reflection surface are flat surfaces.
7. The image sensor package according to claim 6, wherein:

   The second left reflection surface and the second right reflection surface are flat surfaces.
8. The image sensor package according to claim 6, wherein:

   The second left reflection surface and the second right reflection surface are formed as N curved surfaces arranged in a horizontal direction.
9. The image sensor package according to claim 1, wherein:

   The first left reflection surface and the first right reflection surface are curved surfaces.
10. The image sensor package according to claim 9, wherein:

    The second left reflection surface and the second right reflection surface are flat surfaces.
11. The image sensor package according to claim 9, wherein:

    The second left reflection surface and the second right reflection surface are formed as N recessed reflection surfaces arranged in a horizontal direction.
12. The image sensor package according to claim 9, wherein:

    The second left reflection surface is a single concave reflection surface curved toward the left wall side, and the second right reflection surface is a single concave reflection surface curved toward the right wall side.
13. The image sensor package according to claim 1, wherein:

    The image sensor package further includes:

    The third left reflection surface is arranged obliquely at the lower part of the second left reflection surface;

    The fourth left reflection surface is arranged obliquely so as to be opposite to the third left reflection surface and spaced apart in the horizontal direction;

    The third right reflection surface is arranged obliquely below the second right reflection surface; and

    The fourth right reflection surface is arranged obliquely so as to be opposed to the third right reflection surface and spaced apart in the horizontal direction.
14. The image sensor package according to claim 13, wherein:

    The housing includes an upper housing and a lower housing,

    The upper housing includes the second left reflection surface and the second right reflection surface,

    The lower housing includes the third left reflection surface formed on at least a part of the left wall and the third right reflection surface formed on at least a part of the right wall.
15. The image sensor package according to claim 13, wherein:

    The third left reflection surface is parallel to the fourth left reflection surface, and the third right reflection surface is parallel to the fourth right reflection surface.
16. The image sensor package according to claim 1, wherein:

    The image sensor package further includes:

    The left side light shielding wall extends from the first left side reflection surface to the second left side reflection surface; and

    The right light shielding wall extends from the first right reflection surface to the second right reflection surface.
17. The image sensor package according to claim 1, wherein:

    The image sensor package further includes an optical lens, and the optical lens is arranged on top of the 2N image sensors.
18. An image sensor package for realizing a large area detection area. The image sensor package includes:

    The base is configured with an image sensor having a predetermined range of incident angle and a focal distance greater than the thickness of the image sensor package; and

    The unit reflection structure provides a bent light path so that the light belonging to the predetermined incident angle range reaches the image sensor arranged at a position closer than the focal length,

    Wherein, the unit reflection structure includes:

    The first reflecting surface is arranged obliquely to reflect the light incident on the inside after exiting the detection area; and

    The second reflective surface is arranged obliquely so as to face the first reflective surface, and reflects the light from the first reflective surface toward the image sensor.
19. The image sensor package of claim 18, wherein:

    The first reflection surface is parallel to the second reflection surface.
20. The image sensor package of claim 18, wherein:

    The unit reflection structure includes:

    The body is optically transparent and provides a light path through which light enters from the light incident surface;

    The light incident surface is formed on the upper surface of the body;

    The first reflecting surface is formed obliquely at the lower part of the light incident surface so as to face the light incident surface, and reflects light incident through the light incident surface;

    The second reflection surface is formed in parallel with the first reflection surface in a manner facing the first reflection surface, and reflects light from the first reflection surface; and

    A light exit surface is formed at a lower part of the light incident surface so as to face the second reflective surface, and the light from the second reflective surface is emitted toward the image sensor.
21. The image sensor package of claim 20, wherein:

    The image sensor package includes a pair of unit reflection structures,

    The pair of unit reflection structures are configured such that the first reflection surfaces are opposite to each other and the light incident surfaces are located on the same plane.
22. The image sensor package of claim 20, wherein:

    The image sensor package includes a pair of unit reflection structures,

    The pair of unit reflection structures are configured such that the side surfaces connecting the first reflection surface and the second reflection surface are opposite to each other and the light incident surface is located on the same plane.
23. The image sensor package of claim 20, wherein:

    The side surface connecting the first reflection surface and the second reflection surface is formed obliquely.

Images