WO2021051820A1 - 指纹感测模块及电子装置 - Google Patents

指纹感测模块及电子装置 Download PDF

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Publication number
WO2021051820A1
WO2021051820A1 PCT/CN2020/087764 CN2020087764W WO2021051820A1 WO 2021051820 A1 WO2021051820 A1 WO 2021051820A1 CN 2020087764 W CN2020087764 W CN 2020087764W WO 2021051820 A1 WO2021051820 A1 WO 2021051820A1
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Prior art keywords
openings
light
sensing
positions
odd
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PCT/CN2020/087764
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English (en)
French (fr)
Inventor
黄郁湘
范成至
郑裕国
周正三
Original Assignee
神盾股份有限公司
郑裕国
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Application filed by 神盾股份有限公司, 郑裕国 filed Critical 神盾股份有限公司
Priority to KR1020227009674A priority Critical patent/KR20220045234A/ko
Priority to US17/639,586 priority patent/US20220301337A1/en
Publication of WO2021051820A1 publication Critical patent/WO2021051820A1/zh

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H01L27/14601—Structural or functional details thereof
    • H01L27/14625—Optical elements or arrangements associated with the device
    • H01L27/14627—Microlenses
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H01L27/14601—Structural or functional details thereof
    • H01L27/1462—Coatings
    • H01L27/14623—Optical shielding
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/40—OLEDs integrated with touch screens

Definitions

  • the invention relates to a sensing module, and in particular to a fingerprint sensing module and an electronic device.
  • the sensing area of the fingerprint sensing module is proportional to the size of the fingerprint sensing module itself.
  • the fingerprint sensing module in order to increase the sensing area of the fingerprint sensing module, is designed to be suitable for receiving obliquely incident light, so as to increase the sensing area of the fingerprint sensing module.
  • this method needs to design angles for different pixels in the fingerprint sensing module according to different positions, thereby forming a gradual structure. Therefore, this method will increase the difficulty of manufacturing, and because the light path through each pixel is different, the optical path difference between the sensing light of the pixels at different positions will be generated, and the sensing image will be distorted.
  • the present invention is directed to a fingerprint sensing module and electronic device, which can increase the sensing area and has good optical sensing quality.
  • the invention provides a fingerprint sensing module, which is suitable for receiving a sensing beam.
  • the fingerprint sensing module includes a sensing element, a light-transmitting layer, a microlens layer, and a first light-shielding layer.
  • the light-transmitting layer is configured on the sensing element.
  • the micro lens layer is configured on the light-transmitting layer.
  • the first light-shielding layer is disposed in the light-transmitting layer, and includes a plurality of first openings arranged in an array, wherein the positions of the first openings in the odd-numbered columns are the same, the positions of the first openings in the even-numbered columns are the same, and the first openings are in the odd-numbered columns.
  • the position is different from the position of the first opening in the even-numbered column.
  • the sensing beam includes a plurality of first beams and a plurality of second beams.
  • the first light beam is incident on at least a part of the sensing unit in a first transmission direction
  • the second light beam is incident on at least a part of the sensing unit in a second transmission direction
  • the first transmission direction is different from the second transmission direction.
  • the invention provides a fingerprint sensing module, which is suitable for receiving a sensing beam and includes a sensing element, a light-transmitting layer, a microlens layer and a first light-shielding layer.
  • the sensing element includes a plurality of sensing units arranged in an array.
  • the light-transmitting layer is configured on the sensing element.
  • the micro lens layer is configured on the light-transmitting layer and includes a plurality of micro lenses arranged in an array.
  • the first light-shielding layer is disposed in the light-transmitting layer, and includes a plurality of first openings arranged in an array, wherein the positions of the first openings in the odd-numbered columns are the same, the positions of the first openings in the even-numbered columns are the same, and the first openings are in the odd-numbered columns. The position is different from the position of the first opening in the even-numbered column.
  • the sensing beam includes a plurality of first beams and a plurality of second beams. The first beam is incident on at least a part of the sensing unit in a first transmission direction, and the second beam is incident on the sensing unit in a second transmission direction. At least part of it. The first transfer direction is different from the second transfer direction.
  • the present invention also provides an electronic device including a display panel and a fingerprint sensing module.
  • the display panel is suitable for providing an illumination beam to a finger to reflect a sensing beam.
  • the fingerprint sensing module is disposed under the display panel and is suitable for sensing the sensing beam reflected by the finger.
  • the fingerprint sensing module includes a sensing element, a light-transmitting layer, a microlens layer, and a first light-shielding layer.
  • the sensing element includes a plurality of sensing units arranged in an array.
  • the light-transmitting layer is configured on the sensing element.
  • the micro lens layer is configured on the light-transmitting layer and includes a plurality of micro lenses arranged in an array.
  • the first light-shielding layer is disposed in the light-transmitting layer, and includes a plurality of first openings arranged in an array, wherein the positions of the first openings in the odd-numbered columns are the same, the positions of the first openings in the even-numbered columns are the same, and the first openings are in the odd-numbered columns. The position is different from the position of the first opening in the even-numbered column.
  • the sensing beam includes a plurality of first beams and a plurality of second beams. The first beam is incident on at least a part of the sensing unit in a first transmission direction, and the second beam is incident on the sensing unit in a second transmission direction. In addition, at least in part, the first transfer direction is different from the second transfer direction.
  • the first light-shielding layer disposed in the light-transmitting layer includes a plurality of first openings, and the position of the first opening in the odd-numbered column is different from that in the The position of the first opening of the even-numbered column. Therefore, a part of the sensing beam can be incident on the sensing element in the first transmission direction, and another part of the sensing beam can be incident on the sensing element in the second transmission direction. In this way, the sensing area can be increased, the manufacturing difficulty can be reduced, and the optical path difference can be avoided to improve the good optical sensing quality.
  • FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the invention.
  • FIG. 2 is an enlarged schematic diagram of area A of the electronic device in FIG. 1.
  • FIG. 3 is a schematic top view of a fingerprint sensing module according to an embodiment of the invention.
  • 4A and 4B are cross-sectional schematic diagrams of the fingerprint sensor module of FIG. 3 along the line B-B' and the line C-C', respectively.
  • FIG. 5 is a schematic diagram of the sensing area of the fingerprint sensing module in FIG. 3.
  • FIG. 6 is a schematic top view of a fingerprint sensing module according to another embodiment of the invention.
  • FIG. 7 is a schematic diagram of the sensing area of the fingerprint sensing module in FIG. 6.
  • FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the invention. Please refer to Figure 1.
  • This embodiment provides an electronic device 10, which is suitable for sensing biological information of a finger 20, such as a fingerprint.
  • the electronic device 10 includes a display panel 50 and a fingerprint sensing module 100.
  • the display panel 50 is adapted to provide an illumination beam L1 to a finger 20 to reflect a sensing beam L2.
  • the display panel 50 is, for example, an organic light-emitting diode (OLED) display panel.
  • OLED organic light-emitting diode
  • the display panel 50 may also be a liquid crystal display panel or other suitable display panels.
  • the fingerprint sensing module 100 is disposed under the display panel 50 and is suitable for sensing the sensing light beam L2 reflected by the finger 20.
  • the sensing beam L2 carries a fingerprint signal.
  • the user can place the finger 20 on the fingerprint sensing area 52 of the display panel 50, and the sensing light beam L2 reflected by the finger 20 penetrates the display panel 50 and is transmitted to the fingerprint sensing module 100.
  • the display panel 50 is, for example, a transparent display panel.
  • the display panel 50 may also be a display panel having a light-transmitting opening in the area above the fingerprint sensor module 100.
  • the electronic device 10 is, for example, a mobile phone, a tablet computer, a notebook computer, or other appropriate electronic devices.
  • FIG. 2 is an enlarged schematic diagram of area A of the electronic device in FIG. 1. Please refer to Figure 1 and Figure 2 at the same time.
  • the fingerprint sensing module 100 includes a sensing element 110, a light-transmitting layer 120, a microlens layer 130 and a first light-shielding layer 140.
  • the sensing element 110 includes a plurality of sensing units 112 arranged in an array.
  • the sensing element 110 is, for example, a complementary metal oxide semiconductor (CMOS) or a charge coupled device (CCD) light sensor, and the sensing unit 112 is a light sensor in the light sensor. Of sensing pixels.
  • the sensing unit 112 of the sensing element 110 is adapted to receive the sensing light beam L2 for conversion into an electrical signal.
  • CMOS complementary metal oxide semiconductor
  • CCD charge coupled device
  • the light-transmitting layer 120 is disposed on the sensing element 110 and is suitable for passing the sensing light beam L2 therethrough.
  • other structures can be arranged in the unfinished light-transmitting layer 120 when the light-transmitting layer 120 is made, so that the configured structure can be fixed at a specific height or position in the light-transmitting layer 120, for example It is a light-shielding layer, a filter layer, or other types of structures described later, and the present invention is not limited to these.
  • the microlens layer 130 is disposed on the light-transmitting layer 120 and includes a plurality of microlenses 132 arranged in an array. In this embodiment, the center line of the microlens 132 is aligned with the center line of the sensing unit 112, but the invention is not limited to this.
  • FIG. 3 is a schematic top view of a fingerprint sensing module according to an embodiment of the invention.
  • 4A and 4B are cross-sectional schematic diagrams of the fingerprint sensor module of FIG. 3 along the line B-B' and the line C-C', respectively. Please refer to Figure 3 to Figure 4B at the same time.
  • the first light-shielding layer 140 is disposed in the light-transmitting layer 120 and includes a plurality of first openings O1 arranged in an array. Wherein, the position of the first opening O1 of the odd-numbered column E1 is shifted toward one side of the corresponding sensing unit 112, for example, it is shifted to the left in FIG.
  • the position of the first opening O1 of the even-numbered column E2 is toward the corresponding
  • the other side of the sensing unit 112 is offset, for example, to the right in FIG. 3. Therefore, the position of the first opening O1 of the odd-numbered column E1 and the first opening O1 of the even-numbered column E2 are respectively offset in different directions of the corresponding sensing unit 112.
  • the position of the first opening O1 in the odd-numbered column E1 is misaligned with the corresponding sensing unit 112, as shown in FIGS. 3 and 4A. In this way, a part of the sensing beam L2 is incident on the corresponding sensing unit 112 at an oblique angle (for example, oblique from left to right).
  • the position of the first opening O1 in the even-numbered column E2 is also misaligned with the corresponding sensing unit 112, as shown in Figs. 3 and 4B.
  • the sensing light beam L2 incident at another oblique angle (for example, oblique from right to left) is incident to the corresponding sensing unit 112.
  • the sensing light beam L2 includes a plurality of first light beams L21 and a plurality of second light beams L22.
  • the first light beam L21 is incident on at least a part of the sensing unit 112 in a first transmission direction D1
  • the second light beam L22 is
  • the second transmission direction D2 is incident on another part of the sensing unit 112, and the first transmission direction D1 is different from the second transmission direction D2.
  • the direction of the first transmission direction D1 on the horizontal plane is opposite to the direction of the second transmission direction D2 on the horizontal plane.
  • each first opening O1 of the odd-numbered column E1 is the same as each other
  • the pitch of each first opening O1 of the even-numbered column E2 is the same as each other
  • the pitch of the first opening O1 of the odd-numbered column E1 is the same as that of the first opening O1 of the even-numbered column E2.
  • the openings O1 are spaced apart, and the positions of the first openings O1 of the odd-numbered columns E1 and the even-numbered columns E2 are misaligned.
  • FIG. 5 is a schematic diagram of the sensing area of the fingerprint sensing module in FIG. 3. Please refer to Figure 1 and Figure 5.
  • the misalignment design of the first opening O1 of the odd-numbered row E1 and the first opening O1 of the even-numbered row E2 in the first light shielding layer 140 enables the sensing element 110 to receive the obliquely incident sensing beam L2 .
  • the area of the fingerprint sensing area 52 may be allowed to be designed to be larger than the area of the fingerprint sensing module 100 projected on the display surface of the display panel 50, as shown in FIG. The area size of the sensing module 100.
  • the first transfer direction D1 and the second transfer direction D2 form an angle of about 35 degrees with the vertical direction, which can increase the width D of the fingerprint sensing area 52 (for example, up to about 800 microns), as shown in FIG. 1 And shown in Figure 5.
  • the spacing of the first opening O1 of this embodiment is equidistant, so the manufacturing difficulty can be reduced, and at the same time, the optical length of different parts of the sensing light beam L2 can be maintained the same, and thus The optical path difference is avoided, so a good optical sensing effect can be maintained.
  • the maximum sensing range of the fingerprint sensing module 100 of this embodiment can be adjusted by the size design of the structure.
  • the fingerprint sensing module 100 of this embodiment complies with the following formulas (1) and (2):
  • X is the width of a single pixel in the fingerprint sensor module 100 or the pitch of two adjacent microlenses 132 (for example, the distance from the center point of one microlens 132 to the center point of another microlens 132);
  • ⁇ X is the difference between the width X of a single pixel in the fingerprint sensor module 100 and the width Y of the microlens 132;
  • H is the distance H from the bottom surface of the microlens layer 130 to the bottom surface of the second light shielding layer 150;
  • h is the distance h from the sensing element 110 to the first light shielding layer 140;
  • P is the width P of the first opening O1 of the first light shielding layer 140;
  • ⁇ is the central incident angle ⁇ of the sensing beam L2;
  • the width X and the distance H of a single pixel can be adjusted to change the central incident angle ⁇ of the sensing beam L2.
  • the design of the width P of the first opening O1 within the range of +/-5 ⁇ m in accordance with the formula (1) is a reasonable range that is acceptable. In other words, it means
  • FIG. 2 also shows the first critical light beam L31 and the second critical light beam L32 incident on the opposite edges of the single microlens 132 in the sensing light beam L2.
  • the first critical light beam L31 and the second critical light beam L32 can also be transmitted into the light-transmitting layer 120 to generate a refraction path to obtain design parameters of other structures.
  • the relevant formulas for the refraction and other structural parameters of the first critical light beam L31 and the second critical light beam L32 passing into the light-transmitting layer 120 are as follows (3) and (4):
  • the fingerprint sensing module 100 may further include a second light shielding layer 150, including a plurality of second openings O2 arranged in an array, and disposed on the upper surface of the sensing element 110.
  • the second opening O2 exposes a part of the sensing unit 112 respectively.
  • the fingerprint sensing module 100 may further include a light filter layer 160 disposed in the light transmitting layer 120.
  • the filter layer 160 is, for example, an infrared cut filter. However, in other embodiments, the filter layer 160 may also be a filter for filtering other visible light wavebands or invisible light wavebands.
  • FIG. 6 is a schematic top view of a fingerprint sensing module according to another embodiment of the invention. Please refer to Figure 6.
  • the fingerprint sensing module 100A of this embodiment is similar to the fingerprint sensing module 100 shown in FIG. 3. The difference between the two is that, in this embodiment, the first opening O1 in the odd-numbered column E1 and the odd-numbered row F1 is located at a first position of the corresponding sensing unit 112, for example, is offset to the left in FIG. 6 .
  • the first opening O1 in the odd-numbered column E1 and the even-numbered row F2 is located at a second position of the corresponding sensing unit 112, which is offset upward in FIG. 6, for example.
  • the first opening O1 in the even-numbered column E2 and the odd-numbered row F1 is located at a third position of the corresponding sensing unit 112, for example, offset downward in FIG. 6.
  • the first opening O1 in the even-numbered column E2 and the even-numbered row F2 is located at a fourth position of the corresponding sensing unit 112, for example, offset to the right in FIG. 6.
  • the first opening O1 located at the first position, the second position, the third position, and the fourth position of the corresponding sensing unit 112 are respectively offset toward different directions of the corresponding sensing unit 112.
  • the first opening O1 located at the first position is suitable for allowing the sensing light beam L2 obliquely incident from left to right to enter the sensing unit 112.
  • the first opening O1 located in the second position is suitable for obliquely incident the sensing light beam L2 incident from the top to the bottom to the sensing unit 112 obliquely.
  • the first opening O1 located at the third position is suitable for obliquely incident the sensing light beam L2 obliquely incident from the bottom up to the sensing unit 112.
  • the first opening O1 located at the fourth position is suitable for allowing the sensing light beam L2 obliquely incident from right to left to enter the sensing unit 112.
  • the sensing light beam L2 of this embodiment can also include multiple third light beams and multiple fourth light beams according to the incident direction, and the third light beam is transmitted in the third direction. It is incident to the sensing unit, and the fourth light beam is incident to the sensing unit in a fourth transmission direction.
  • the direction of the third transmission direction on the horizontal plane is opposite to the direction of the fourth transmission direction on the horizontal plane, and the direction of the third transmission direction on the horizontal plane and the direction of the fourth transmission direction on the horizontal plane are perpendicular to the first transmission direction.
  • FIG. 7 is a schematic diagram of the sensing area of the fingerprint sensing module in FIG. 6. Please refer to Figure 7.
  • the sensing element 110 can receive the obliquely incident sensing light beam L2.
  • the area of the fingerprint sensing area 52 may be allowed to be designed to be larger than the area of the fingerprint sensing module 100A projected on the display surface of the display panel 50 (see FIG. 1), as shown in FIG. 7 for fingerprint sensing Area 52.
  • the angle between the first transfer direction and the fourth transfer direction and the vertical direction is about 35 degrees, so that the amplified width D of the fingerprint sensing area 52 can reach about 800 microns, as shown in FIG. 7.
  • the spacing of the first opening O1 of this embodiment is designed to be equidistant, so the manufacturing difficulty can be reduced, and at the same time, the optical path of the different parts of the sensing beam L2 can also be sensed. Keep the same, and avoid the optical path difference, so the good optical sensing effect can be maintained.
  • the first light shielding layer disposed in the light-transmitting layer includes a plurality of first openings, and the position of the first opening in the odd-numbered column is different from It is located at the position of the first opening of the even-numbered column. Therefore, a part of the sensing beam can be incident on the sensing element in the first transmission direction, and another part of the sensing beam can be incident on the sensing element in the second transmission direction. In this way, the sensing area can be increased, the manufacturing difficulty can be reduced, and the optical path difference can be avoided to improve the good optical sensing quality.

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Abstract

一种指纹感测模块（100，100A）与电子装置（10），指纹感测模块（100，100A）适于接收感测光束。指纹感测模块（100，100A）包括感测元件（110）、透光层（120）、微透镜层（130）以及第一遮光层（140）。透光层（120）配置于感测元件（110）上。微透镜层（130）配置于透光层（120）上。第一遮光层（140）配置于透光层（120）中，包括多个阵列排列的第一开口（01），其中第一开口（01）在奇数列的位置相同，第一开口（01）在偶数列的位置相同，且第一开口（01）在奇数列的位置不同于第一开口（01）在偶数列的位置。感测光束包括多个第一光束（L21）以及多个第二光束（L22）。第一光束（L21）以第一传递方向入射至感测单元（112）的至少一部分，且第二光束（L22）以第二传递方向入射至感测单元（112）的另外至少一部分，第一传递方向与第二传递方向不同。指纹感测模块（100，100A）可增加感测面积，且具有良好的光学感测质量。

Description

指纹感测模块及电子装置 技术领域
本发明涉及一种感测模块，且特别是涉及一种指纹感测模块与电子装置。
背景技术
随着可携式电子装置(例如智能型手机或平板计算机)朝向大屏占比或全面屏发展，传统位于屏幕旁的电容式指纹感测模块无法再配置于电子装置的正面。于是，配置于电子装置侧面或背面的电容式指纹感测模块的方案便被采用。然而，放置于侧面或背面的电容式指纹感测模块在使用上有其不便之处，所以近来发展出放置于屏幕下方的方案的光学式指纹感测模块。
一般而言，指纹感测模块的感测面积与指纹感测模块本身的尺寸成正比。在一些做法中，为了增加指纹感测模块的感测面积，会将指纹感测模块设计成适于接收倾斜入射之光线，以增加指纹感测模块的感测面积。然而，此种作法需针对指纹感测模块中的不同像素依据不同位置而设计角度，进而形成渐变式的结构。因此，此种作法将增加制作难易度，且由于通过每个像素的光路不同，故不同位置的像素的感测光之间会产生光程差，进而造成感测影像失真。
发明内容
本发明是针对一种指纹感测模块及电子装置，可增加感测面积，且具有良好的光学感测质量。
本发明提供一种指纹感测模块，适于接收感测光束。指纹感测模块包括感测元件、透光层、微透镜层以及第一遮光层。透光层配置于感测元件上。微透镜层配置于透光层上。第一遮光层配置于透光层中，包括多个阵列排列的第一开口，其中第一开口在奇数列的位置相同，第一开口在偶数列的位置相同，且第一开口在奇数列的位置不同于第一开口在偶数列的位置。感测光束包括多个第一光束以及多个第二光束。第一光束以第一传递方向入射至感 测单元的至少一部分，且第二光束以第二传递方向入射至感测单元的另外至少一部分，第一传递方向与第二传递方向不同。
本发明提供一种指纹感测模块，适于接收一感测光束，包括一感测元件、一透光层、一微透镜层以及一第一遮光层。感测元件包括阵列排列的多个感测单元。透光层配置于感测元件上。微透镜层配置于透光层上，包括阵列排列的多个微透镜。第一遮光层配置于透光层中，包括多个阵列排列的第一开口，其中第一开口在奇数列的位置相同，第一开口在偶数列的位置相同，且第一开口在奇数列的位置不同于第一开口在偶数列的位置。感测光束包括多个第一光束以及多个第二光束，第一光束以一第一传递方向入射至感测单元的至少一部分，且第二光束以一第二传递方向入射至感测单元的另外至少一部分。第一传递方向与第二传递方向不同。
本发明另外提供一种电子装置，包括一显示面板以及一指纹感测模块。显示面板适于提供一照明光束至一手指以反射出一感测光束。指纹感测模块配置于显示面板下方，适于感测由手指所反射的感测光束。指纹感测模块包括一感测元件、一透光层、一微透镜层以及一第一遮光层。感测元件包括阵列排列的多个感测单元。透光层配置于感测元件上。微透镜层配置于透光层上，包括阵列排列的多个微透镜。第一遮光层配置于透光层中，包括多个阵列排列的第一开口，其中第一开口在奇数列的位置相同，第一开口在偶数列的位置相同，且第一开口在奇数列的位置不同于第一开口在偶数列的位置。感测光束包括多个第一光束以及多个第二光束，第一光束以一第一传递方向入射至感测单元的至少一部分，且第二光束以一第二传递方向入射至感测单元的另外至少一部分，第一传递方向与第二传递方向不同。
基于上述，在本发明的指纹感测模块及电子装置中，配置于透光层中的第一遮光层包括多个第一开口，且位在奇数列的这第一开口的位置不同于位在偶数列的第一开口的位置。因此，可使得感测光束的其中一部分以第一传递方向入射至感测元件，而感测光束的另外其中一部分以第二传递方向入射至感测元件。如此一来，可同时增加感测面积、降低制作难易度，且避免产生光程差以提升良好的光学感测质量。
附图说明
图1为本发明一实施例的电子装置的示意图。
图2为图1的电子装置的A区域的放大示意图。
图3为本发明一实施例的指纹感测模块的俯视示意图。
图4A及图4B分别为图3的指纹感测模块沿B-B’线及C-C’线的剖面示意图。
图5为图3的指纹感测模块的感测面积示意图。
图6为本发明另一实施例的指纹感测模块的俯视示意图。
图7为图6的指纹感测模块的感测面积示意图。
附图标记说明
10:电子装置
20:手指
50:显示面板
52:指纹感测区域
100、100A:指纹感测模块
110:感测元件
112:感测单元
120:透光层
130:微透镜层
132:微透镜
140:第一遮光层
150:第二遮光层
160:滤光层
D、P、X、Y:宽度
D1:第一传递方向
D2:第二传递方向
E1:奇数列
E2:偶数列
F1:奇数行
F2:偶数行
H、h:距离
θ:入射角度
L1:照明光束
L2:感测光束
L21:第一光束
L22:第二光束
L31:第一临界光束
L32:第二临界光束
O1:第一开口
O2:第二开口
具体实施方式
现将详细地参考本发明的示范性实施例，示范性实施例的实例说明于附图中。只要有可能，相同元件符号在图式和描述中用来表示相同或相似部分。
图1为本发明一实施例的电子装置的示意图。请参照图1。本实施例提供一种电子装置10，适于藉由发出感测一手指20的生物信息，例如是指纹。电子装置10包括一显示面板50以及一指纹感测模块100。显示面板50适于提供一照明光束L1至一手指20以反射出一感测光束L2。显示面板50例如为有机发光二极管(organic light-emitting diode,OLED)显示面板。然而，在其他实施例中，显示面板50亦可以是液晶显示面板或其他适当的显示面板。
指纹感测模块100配置于显示面板50下方，适于感测由手指20所反射 的感测光束L2。换句话说，即感测光束L2带有指纹信号。具体而言，使用者可将手指20放置于显示面板50的指纹感测区域52上，经由手指20反射出的感测光束L2穿透显示面板50传递至指纹感测模块100。在本实施例中，显示面板50例如为透明显示面板。然而，在其他实施例中，显示面板50亦可以是在指纹感测模块100上方的区域具有透光开口的显示面板。电子装置10例如为手机、平板计算机、笔记本电脑或其他适当的电子装置。
图2为图1的电子装置的A区域的放大示意图。请同时参照图1及图2。指纹感测模块100包括一感测元件110、一透光层120、一微透镜层130以及一第一遮光层140。感测元件110包括阵列排列的多个感测单元112。在本实施例中，感测元件110例如是互补式金氧半导体(complementary metal oxide semiconductor,CMOS)或电荷耦合器件(charge coupled device,CCD)等光传感器，而感测单元112则为光传感器中的感测像素。感测元件110的感测单元112适于接收感测光束L2以转换成电讯号。透光层120配置于感测元件110上，适于让感测光束L2传递通过。此外，藉由制程的进行，可在制作透光层120时配置其他结构在未完成的透光层120中，以使所配置的结构能固定于透光层120中的特定高度或位置，例如是后述说明的遮光层、滤光层或其他种类结构，本发明并不限于此。微透镜层130配置于透光层120上，包括阵列排列的多个微透镜132。在本实施例中，微透镜132的中心线与感测单元112的中心线对齐，但本发明亦不限于此。
图3为本发明一实施例的指纹感测模块的俯视示意图。图4A及图4B分别为图3的指纹感测模块沿B-B’线及C-C’线的剖面示意图。请同时参考图3至图4B。第一遮光层140配置于透光层120中，包括多个阵列排列的第一开口O1。其中，奇数列E1的第一开口O1的位置朝对应的感测单元112其中一侧偏移，例如为图3中朝左方偏移，而偶数列E2的第一开口O1的位置朝对应的感测单元112其中另一侧偏移，例如为图3中朝右方偏移。因此，奇数列E1的第一开口O1的位置与偶数列E2的第一开口O1分别朝对应的感测单元112的不同方向偏移。具体而言，在本实施例中，位在奇数列E1的第一开口O1的位置与对应的感测单元112错位，如图3及图4A所绘示。以使得感测光束L2的一部分以一倾斜角度(例如是由左向右倾斜)入射至对应的感测单元112。另一方面，位在偶数列E2的第一开口O1的位置同样地也与对 应的感测单元112错位，如图3及图4B所绘示。以使得以另一倾斜角度(例如，由右向左倾斜)入射的感测光束L2入射至对应的感测单元112。
换句话说，感测光束L2包括多个第一光束L21以及多个第二光束L22，第一光束L21以一第一传递方向D1入射至至少一部分的感测单元112，第二光束L22以一第二传递方向D2入射至另外一部分的感测单元112，第一传递方向D1与第二传递方向D2不同。详细而言，第一传递方向D1在水平面上的方向与第二传递方向D2在水平面上的方向相反。此外，奇数列E1的每一个第一开口O1的间距彼此相同，偶数列E2的每一个第一开口O1的间距彼此相同，且奇数列E1的第一开口O1间距相同于偶数列E2的第一开口O1间距，且奇数列E1与偶数列E2的第一开口O1的位置彼此错位。
图5为图3的指纹感测模块的感测面积示意图。请参考图1及图5。如此一来，藉由上述第一遮光层140中奇数列E1的第一开口O1与偶数列E2的第一开口O1的错位设计，能使得感测元件110可接收斜向的入射感测光束L2。换句话说，指纹感测区域52的面积可被允许设计为大于指纹感测模块100投影在显示面板50的显示表面上的面积，如图5所绘示的指纹感测区域52面积大小与指纹感测模块100的面积大小。在较佳的实施例中，第一传递方向D1与第二传递方向D2与垂直方向夹约35度角，可增幅指纹感测区域52的宽度D(例如，达到约800微米)，如图1及图5所标示。相较于一般渐进式的倾斜设计，本实施例的第一开口O1的间距为等距，故可降低制作难易度，同时，也可使不同部分感测光束L2的光程维持相同，进而避免产生光程差，故可维持良好光学感测效果。
请继续参考图2。值得一提的是，本实施例指纹感测模块100的最大感测范围，可藉由结构的尺寸设计进行调整。详细而言，本实施例的指纹感测模块100符合下列公式(1)、(2)：
Figure PCTCN2020087764-appb-000001
Figure PCTCN2020087764-appb-000002
其中，
X为指纹感测模块100中单一像素宽度X或相邻两微透镜132 的节距(pitch)(例如是一个微透镜132的中心点至另一个微透镜132的中心点的距离)；
ΔX为指纹感测模块100中单一像素宽度X与微透镜132的宽度Y的差；
H为微透镜层130底面至第二遮光层150底面的距离H；
h为感测元件110至第一遮光层140的距离h；
P为第一遮光层140的第一开口O1的宽度P；
θ为感测光束L2的中央入射角度θ；
因此，由上述公式可知，在不同的情境中，可调整单一像素宽度X与距离H以改变感测光束L2的中央入射角度θ。第一开口O1的宽度P设计在符合公式(1)下+/-5μm的范为内都是可以接受之合理范围。换句话说，即表示
Figure PCTCN2020087764-appb-000003
补充说明的是，于图2中还显示了感测光束L2中入射单一微透镜132相对两边缘的第一临界光束L31以及第二临界光束L32。本实施例也可藉由第一临界光束L31以及第二临界光束L32传递进入透光层120产生折射路径从而获得其他结构的设计参数。第一临界光束L31以及第二临界光束L32传递进入透光层120所产生折射与其他结构参数的相关公式参考如下(3)、(4)：
Figure PCTCN2020087764-appb-000004
Figure PCTCN2020087764-appb-000005
除此之外，在本实施例中，指纹感测模块100还可包括一第二遮光层150，包括阵列排列的多个第二开口O2，配置于感测元件110之上表面。而第二开口O2分别暴露感测单元112的一部分。另外，指纹感测模块100还可包括一滤光层160，配置于透光层120中。滤光层160例如为红外光截止滤光片。 然而，在其他实施例中，滤光层160亦可以是过滤其他可见光波段或不可见光波段的滤光片。
图6为本发明另一实施例的指纹感测模块的俯视示意图。请参考图6。本实施例的指纹感测模块100A类似于图3所显示的指纹感测模块100。两者不同之处在于，在本实施例中，在奇数列E1及奇数行F1中的第一开口O1位于对应的感测单元112的一第一位置，例如为图6中朝左方偏移。在奇数列E1及偶数行F2中的第一开口O1位于对应的感测单元112的一第二位置，例如为图6中朝上方偏移。在偶数列E2及奇数行F1中的第一开口O1位于对应的感测单元112的一第三位置，例如为图6中朝下方偏移。在偶数列E2及偶数行F2中的第一开口O1位于对应的感测单元112的一第四位置，例如为图6中朝右方偏移。换句话说，上述位于对应的感测单元112的第一位置、第二位置、第三位置以及第四位置的第一开口O1分别朝其对应的感测单元112的不同方向偏移。
具体而言，在本实施例中，位在第一位置的第一开口O1适于让由左向右倾斜入射的感测光束L2入射至感测单元112。另一方面，位在第二位置的第一开口O1适于让由上向下倾斜入射的感测光束L2倾斜入射至感测单元112。依此类推，位在第三位置的第一开口O1适于让由下向上倾斜入射的感测光束L2倾斜入射至感测单元112。另一方面，位在第四位置的第一开口O1适于让由右向左倾斜入射的感测光束L2入射至感测单元112。
换句话说，本实施例的第一开口O1以2x 2阵列为一单位重复排列。相较于图3实施例中的指纹感测模块100，本实施例的感测光束L2还可依据入射方向包括多个第三光束以及多个第四光束，而第三光束以第三传递方向入射至感测单元，且第四光束以第四传递方向入射至感测单元。其中，第三传递方向在水平面上的方向与第四传递方向在水平面上的方向相反，且第三传递方向在水平面上的方向及第四传递方向在水平面上的方向垂直于第一传递方向在水平面上的方向与第二传递方向在水平面上的方向。
图7为图6的指纹感测模块的感测面积示意图。请参考图7。如此一来，藉由上述第一遮光层140的第一开口O1的四个位置的错位设计，能使得感测元件110可接收斜向的入射感测光束L2。换句话说，指纹感测区域52的 面积可被允许设计为大于指纹感测模块100A投影在显示面板50(见如图1)的显示表面上的面积，如图7所绘示的指纹感测区域52。在较佳的实施例中，第一传递方向至第四传递方向与垂直方向夹约35度角，可使指纹感测区域52的增幅宽度D达到约800微米，如图7所标示。此外，相较于一般渐进式的倾斜设计，本实施例的第一开口O1的间距皆设计为等距，故可降低制作难易度，同时，也可使不同部分感测光束L2的光程维持相同，进而避免产生光程差，故可维持良好光学感测效果。
综上所述，在本发明的指纹感测模块及电子装置中，配置于透光层中的第一遮光层包括多个第一开口，且位在奇数列的这第一开口的位置不同于位在偶数列的第一开口的位置。因此，可使得感测光束的其中一部分以第一传递方向入射至感测元件，而感测光束的另外其中一部分以第二传递方向入射至感测元件。如此一来，可同时增加感测面积、降低制作难易度，且避免产生光程差以提升良好的光学感测质量。
最后应说明的是：以上各实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述各实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分或者全部技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims (20)

  1. 一种指纹感测模块，其特征在于，适于接收感测光束，包括：
    感测元件，包括阵列排列的多个感测单元；
    透光层，配置于所述感测元件上；
    微透镜层，配置于所述透光层上，包括阵列排列的多个微透镜；以及
    第一遮光层，配置于所述透光层中，包括多个阵列排列的第一开口，其中所述多个第一开口在奇数列的位置相同，所述多个第一开口在偶数列的位置相同，且所述多个第一开口在奇数列的位置不同于所述多个第一开口在偶数列的位置，所述感测光束包括多个第一光束以及多个第二光束，所述多个第一光束以第一传递方向入射至所述多个感测单元的至少一部分，且所述多个第二光束以第二传递方向入射至所述多个感测单元的另外至少一部分，所述第一传递方向与所述第二传递方向不同。
  2. 根据权利要求1所述的指纹感测模块，其特征在于，所述第一传递方向在水平面上的方向与所述第二传递方向在水平面上的方向相反。
  3. 根据权利要求1所述的指纹感测模块，其特征在于，所述感测光束还包括多个第三光束以及多个第四光束，所述多个第三光束以第三传递方向入射至所述多个感测单元的另外至少一部分，且所述多个第四光束以第四传递方向入射至所述多个感测单元的另外至少一部分。
  4. 根据权利要求3所述的指纹感测模块，其特征在于，所述第三传递方向在水平面上的方向与所述第四传递方向在水平面上的方向相反，且所述第三传递方向在水平面上的方向及所述第四传递方向在水平面上的方向垂直于所述第一传递方向在水平面上的方向与所述第二传递方向在水平面上的方向。
  5. 根据权利要求1所述的指纹感测模块，其特征在于，所述多个第一开口在奇数列的间距彼此相同，所述多个第一开口在偶数列的间距彼此相同，所述多个第一开口在奇数列的间距相同于所述多个第一开口在偶数列的间距，且所述多个第一开口在奇数列的位置错位于所述多个第一开口在偶数列的位置。
  6. 根据权利要求1所述的指纹感测模块，其特征在于，所述多个第一开口在奇数列中奇数行位于第一位置，所述多个第一开口在奇数列中偶数行位 于第二位置，所述多个第一开口在偶数列中奇数行位于第三位置，所述多个第一开口在偶数列中偶数行位于第四位置，所述多个第一位置、所述多个第二位置、所述多个第三位置以及所述多个第四位置彼此不同。
  7. 根据权利要求1所述的指纹感测模块，其特征在于，所述多个感测单元的位置在垂直方向上对齐于所述多个微透镜的位置。
  8. 根据权利要求1所述的指纹感测模块，其特征在于，包括：
    第二遮光层，包括阵列排列的多个第二开口，配置于所述感测元件，所述多个第二开口分别暴露所述多个感测单元的至少一部分。
  9. 根据权利要求1所述的指纹感测模块，其特征在于，包括：
    滤光层，配置于所述透光层。
  10. 根据权利要求1所述的指纹感测模块，其特征在于，所述指纹感测模块符合：
    Figure PCTCN2020087764-appb-100001
    以及
    Figure PCTCN2020087764-appb-100002
    其中，X为所述指纹感测模块中单一像素宽度，ΔX为所述指纹感测模块中单一像素宽度与单一个所述多个微透镜的宽度的差，H为所述微透镜层的底面至第二遮光层的底面的距离，h为所述感测元件至所述第一遮光层的距离，P为所述第一遮光层的单一所述多个第一开口的宽度，θ为所述感测光束的中央入射角度。
  11. 一种电子装置，其特征在于，包括：
    显示面板，适于提供照明光束至手指以反射出感测光束；以及
    指纹感测模块，配置于所述显示面板下方，适于感测由所述手指所反射的所述感测光束，所述指纹感测模块包括：
    感测元件，包括阵列排列的多个感测单元；
    透光层，配置于所述感测元件上；
    微透镜层，配置于所述透光层上，包括阵列排列的多个微透镜；以及
    第一遮光层，配置于所述透光层中，包括多个阵列排列的第一开口，其中所述多个第一开口在奇数列的位置相同，所述多个第一开口在偶数列的位置相同，且所述多个第一开口在奇数列的位置不同于所述多个第 一开口在偶数列的位置，所述感测光束包括多个第一光束以及多个第二光束，所述多个第一光束以第一传递方向入射至所述多个感测单元的至少一部分，且所述多个第二光束以第二传递方向入射至所述多个感测单元的另外至少一部分，所述第一传递方向与所述第二传递方向不同。
  12. 根据权利要求11所述的电子装置，其特征在于，所述第一传递方向在水平面上的方向与所述第二传递方向在水平面上的方向相反。
  13. 根据权利要求11所述的电子装置，其特征在于，所述感测光束还包括多个第三光束以及多个第四光束，所述多个第三光束以第三传递方向入射至所述多个感测单元的另外至少一部分，且所述多个第四光束以第四传递方向入射至所述多个感测单元的另外至少一部分。
  14. 根据权利要求13所述的电子装置，其特征在于，所述第三传递方向在水平面上的方向与所述第四传递方向在水平面上的方向相反，且所述第三传递方向在水平面上的方向及所述第四传递方向在水平面上的方向垂直于所述第一传递方向在水平面上的方向与所述第二传递方向在水平面上的方向。
  15. 根据权利要求11所述的电子装置，其特征在于，所述多个第一开口在奇数列的间距彼此相同，所述多个第一开口在偶数列的间距彼此相同，所述多个第一开口在奇数列的间距相同于所述多个第一开口在偶数列的间距，且所述多个第一开口在奇数列的位置错位于所述多个第一开口在偶数列的位置。
  16. 根据权利要求11所述的电子装置，其特征在于，所述多个第一开口在奇数列中奇数行的位于第一位置，所述多个第一开口在奇数列中偶数行位于第二位置，所述多个第一开口在偶数列中奇数行位于第三位置，所述多个第一开口在偶数列中偶数行位于第四位置，所述多个第一位置、所述多个第二位置、所述多个第三位置以及所述多个第四位置彼此不同。
  17. 根据权利要求11所述的电子装置，其特征在于，所述多个感测单元的位置在垂直方向上对齐于所述多个微透镜的位置。
  18. 根据权利要求11所述的电子装置，其特征在于，所述指纹感测模块包括第二遮光层，所述第二遮光层包括阵列排列的多个第二开口，配置于所述感测元件，所述多个第二开口分别暴露所述多个感测单元的至少一部分。
  19. 根据权利要求11所述的电子装置，其特征在于，包括：
    滤光层，配置于所述透光层。
  20. 根据权利要求11所述的电子装置，其特征在于，所述指纹感测模块符合：
    Figure PCTCN2020087764-appb-100003
    以及
    Figure PCTCN2020087764-appb-100004
    其中，X为所述指纹感测模块中单一像素宽度，ΔX为所述指纹感测模块中单一像素宽度与单一个所述多个微透镜的宽度的差，H为所述微透镜层的底面至第二遮光层的底面的距离，h为所述感测元件至所述第一遮光层的距离，P为所述第一遮光层的单一所述多个第一开口的宽度，且θ为所述感测光束的中央入射角度。
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