WO2020019870A1 - 显示模组及显示装置 - Google Patents

显示模组及显示装置 Download PDF

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Publication number
WO2020019870A1
WO2020019870A1 PCT/CN2019/089679 CN2019089679W WO2020019870A1 WO 2020019870 A1 WO2020019870 A1 WO 2020019870A1 CN 2019089679 W CN2019089679 W CN 2019089679W WO 2020019870 A1 WO2020019870 A1 WO 2020019870A1
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WO
WIPO (PCT)
Prior art keywords
display panel
hole
phase retarder
light
display
Prior art date
Application number
PCT/CN2019/089679
Other languages
English (en)
French (fr)
Inventor
孙艳六
Original Assignee
京东方科技集团股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to JP2019564149A priority Critical patent/JP7413021B2/ja
Priority to EP19841517.6A priority patent/EP3832362A4/en
Priority to US16/618,554 priority patent/US11367858B2/en
Publication of WO2020019870A1 publication Critical patent/WO2020019870A1/zh

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    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00—Organic light-emitting devices
    • H10K50/80—Constructional details
    • H10K50/86—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/30—Polarising elements
    • 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
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays
    • H10K59/131—Interconnections, e.g. wiring lines or terminals
    • 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
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors
    • 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
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

  • the present disclosure relates to the field of display technology, and in particular, to a display module and a display device.
  • a circular polarizer is generally provided on the light-emitting side of a display screen of an electronic device, so that light transmitted through the circular polarizer is linearly polarized light.
  • currently polarized sunglasses on the market are equivalent to linear polarizers, and their absorption axes are horizontal (ie, 0 °) or vertical (ie, 90 °).
  • the polarization direction of the light transmitted through the circularly polarizing plate is parallel to the absorption axis of the polarized sunglasses, the light transmitted through the circularly polarized plate is absorbed by the polarized sunglasses, thereby preventing the human eye from seeing the light, which in turn prevents the Seeing the picture on the display greatly reduces the user experience.
  • a display panel which is an organic electroluminescence display panel
  • a first phase retarder which is located on one side of a light emitting surface of the display panel
  • a linear polarizer on a side of the first phase retarder facing away from the display panel
  • a second phase retarder covers a side of the linear polarizer facing away from the display panel.
  • At least one of the second phase retarder and the linear polarizer includes a plurality of first through-holes for implementing pinhole imaging
  • the display area of the display panel includes: a transparent area corresponding to each of the first through holes; an orthographic projection of the transparent area on the display panel and a corresponding first through hole on the front of the display panel. Projections have overlapping areas;
  • the display module further includes a light sensor for receiving an image formed by a fingerprint through the first through hole.
  • the orthographic projection of the transparent area on the display panel covers the orthographic projection of the corresponding first through hole on the display panel.
  • each of the first through holes is circular; and the transparent region is a circle provided concentrically with the corresponding first through hole.
  • h represents between a lower surface of the second phase retarder facing the display panel and a lower surface of the display panel facing away from the second phase retarder. distance;
  • h represents a lower surface of the linear polarizer facing the display panel and the The distance between the display panel surface and the lower surface of the second phase retarder.
  • the diameter of the first through hole ranges from 6 ⁇ m to 20 ⁇ m.
  • the first phase retarder includes second through holes corresponding to each of the first through holes
  • the orthographic projection of the second through hole on the display panel and the orthographic projection of the corresponding first through hole on the display panel have overlapping areas.
  • the orthographic projection of the second through hole on the display panel covers the orthographic projection of the corresponding first through hole on the display panel.
  • the second through hole is a circular shape arranged concentrically with the corresponding first through hole.
  • h ′ represents a lower surface of the second phase retarder facing the display panel and the first surface retarder facing the lower surface of the display panel.
  • h ′ represents a lower surface of the first phase retarder facing the display panel. A distance from the upper surface of the first phase retarder facing away from the display panel.
  • the first phase retarder and the second phase retarder are both 1 / 4 ⁇ wave plates.
  • the included angle between the transmission axis direction of the linear polarizer and the optical axis of the second phase retarder is plus or minus 45 °;
  • the included angle between the transmission axis direction of the linear polarizer and the optical axis of the first phase retarder is plus or minus 45 °.
  • the display panel further includes: a plurality of pixel units and a trace disposed in a gap between two adjacent pixel units;
  • the photo-sensing detector includes a charge-coupled photosensitive image sensor or a complementary metal oxide semiconductor photosensitive image sensor.
  • the photo detector is disposed on a backlight surface of the display panel and is disposed corresponding to the first through hole.
  • the light-sensing detector corresponds to all of the first through holes, and the light-sensing detector is in a positive position of the display panel.
  • the projection covers all the orthographic projections of the first through holes on the display panel; or,
  • each of the light-sensing detectors corresponds to each of the first through holes, and the light-sensing detector covers the corresponding first projection on an orthographic projection of the display panel.
  • the orthographic projection of the through hole on the display panel is a plurality of light-sensing detectors, each of the light-sensing detectors corresponds to each of the first through holes, and the light-sensing detector covers the corresponding first projection on an orthographic projection of the display panel. The orthographic projection of the through hole on the display panel.
  • an embodiment of the present disclosure further provides a display device including the above display module.
  • FIG. 1 is one of the structural schematic diagrams of a display module according to an embodiment of the present disclosure
  • FIG. 2a is a second schematic structural diagram of a display module according to an embodiment of the present disclosure.
  • FIG. 2b is a schematic diagram of the polarization state of light rays corresponding to the structure shown in FIG. 2a;
  • 3a is a third structural schematic diagram of a display module according to an embodiment of the present disclosure.
  • FIG. 3b is a schematic diagram of the polarization state of light rays corresponding to the structure shown in FIG. 2a;
  • 4a is a fourth schematic structural diagram of a display module according to an embodiment of the present disclosure.
  • 4b is a schematic diagram of a polarization state of light rays corresponding to the structure shown in FIG. 2a;
  • FIG. 5 is a fifth schematic structural diagram of a display module according to an embodiment of the present disclosure.
  • FIG. 6 is a sixth schematic structural diagram of a display module according to an embodiment of the present disclosure.
  • FIG. 7 is a seventh schematic structural diagram of a display module according to an embodiment of the present disclosure.
  • An embodiment of the present disclosure provides a display module, as shown in FIG. 1, including:
  • a display panel 100 which is an organic electroluminescence display panel
  • the first phase retarder 210 is located on a light emitting surface side of the display panel 100;
  • the linear polarizer 220 is located on a side of the first phase retarder 210 facing away from the display panel 100;
  • the second phase retarder 300 covers the side of the linear polarizer 220 facing away from the display panel 100.
  • a second phase retarder is disposed on the side of the online polarizer facing away from the display panel. Since the light emitted from the display panel passes through the first phase retarder and the linear polarizer, it becomes linearly polarized light. The linearly polarized light is converted into circularly polarized light after passing through the second phase retarder. Since the circularly polarized light can pass through the linear polarizer, when a person wears polarized sunglasses, no matter whether the absorption axis of the polarized sunglasses is horizontal or vertical, light always enters the human eyes through the polarized sunglasses, thus Allows the observer to see the picture displayed on the display panel.
  • the display panel may be an OLED display panel.
  • the display panel may include a plurality of pixel units and a trace disposed in a gap between two adjacent pixel units.
  • the pixel unit has an organic light emitting diode (OLED) and a pixel circuit for driving the OLED to emit light.
  • OLED organic light emitting diode
  • the traces are used to input various driving signals to the pixel circuit.
  • the display panel may be a rigid display panel.
  • the base substrate of the display panel may be a glass substrate, a sapphire substrate, a quartz substrate, a plastic substrate, or the like; or, the display panel may also be a flexible display panel, such as a display panel.
  • the base substrate may be a PI substrate, which is not limited herein.
  • a first phase retarder and a linear polarizer are generally used to solve the problem that the display panel reflects external ambient light.
  • the external ambient light is generally natural light.
  • the linear polarizer only light with a vibration direction parallel to the transmission axis of the linear polarizer can pass through the linear polarizer, and after the natural light passes through the second phase retarder, It does not change the polarization state and is still natural light. Therefore, external ambient light is still natural light after passing through the second phase retarder. Only half of the ambient ambient light can pass through the linear polarizer.
  • the passing light is horizontally polarized light as an example.
  • the light of the horizontally polarized light passing through the first phase retarder can be changed into right-handed circularly polarized light (taking right-handed light as an example), and the right-handed circularly polarized light can be turned into left-handed circularly polarized light through reflection from the display panel.
  • the polarized light becomes linearly polarized light through the first phase retarder, but the vibration direction of the linearly polarized light after passing through the first phase retarder and the transmission axis direction of the linear polarizer are perpendicular, so that the light reflected through the display panel The inability to pass the linear polarizer, thereby solving the problem of the display panel reflecting ambient light and improving the display effect.
  • the first phase retarder and the second phase retarder may be 1 / 4 ⁇ wave plates or other phase retarders, which is not limited herein.
  • the angle between the transmission axis direction of the linear polarizer and the optical axis of the second phase retarder may be plus or minus 45 °, so that the transmission line The polarized light of the polarizer is converted into circularly polarized light after passing through the second phase retarder.
  • the transmission axis direction of the linear polarizer can be set to an angle of plus or minus 45 with the optical axis of the first phase retarder. °.
  • the light emitted by the display panel is approximately natural light, and the light after passing through the first phase retarder 210 is still natural light. After that, the light after passing through the linear polarizer 220 is converted into linearly polarized light.
  • the included angle between the vibration direction of the light and the optical axis of the second phase retarder 300 can be plus or minus 45 °, so that the light converted into linearly polarized light can be converted into circularly polarized light after passing through the second phase retarder 300. It can pass through the linear polarizer, so the light emitted by the display module can enter the human eye through polarized sunglasses.
  • Fingerprint is an invariable feature that is unique to the human body and can be distinguished from others. It consists of a series of ridges and valleys on the surface of the skin of the fingertips. The details of the composition of these ridges and valleys determine the uniqueness of the fingerprint pattern.
  • the display panel with fingerprint recognition function developed from it has been used for personal identification, which increases the information security of the display module. Therefore, the display module can be integrated with a fingerprint recognition function.
  • the following describes the implementation of the integrated fingerprint recognition function of the present disclosure in detail with specific examples. It should be noted that this embodiment is only for better explaining the disclosure, but does not limit the disclosure.
  • the display module may further include a protective cover 400 disposed on a side of the second phase retarder 300 facing away from the display panel 100. .
  • At least one of the second phase retarder and the linear polarizer includes a plurality of first through holes for implementing pinhole imaging
  • the display area of the display panel includes: a transparent area corresponding to each of the first through holes; an orthographic projection of the transparent area on the display panel and an orthographic projection of the corresponding first through hole on the display panel have overlapping areas;
  • the display module further includes a light-sensing detector for receiving an image formed by a fingerprint passing through the first through hole.
  • FIG. 2a is a schematic diagram of a structure in which a first through hole is provided only in a second phase retarder.
  • the second phase retarder 300 may include multiple Hole imaging first through hole 310;
  • the display area of the display panel may include: a transparent area 110 corresponding to each of the first through holes 310; an orthographic projection of the transparent area 110 on the display panel 100 and an orthographic projection of the corresponding first through hole 310 on the display panel 100 have an intersection Overlapping area
  • the display module may further include a photodetector 500 for receiving an image formed by a fingerprint through the first through hole 310.
  • the orthographic projection of the transparent region 110 on the display panel 100 may cover the orthographic projection of the corresponding first through hole 310 on the display panel 100.
  • the pattern of the first through hole can be any pattern capable of realizing the principle of small hole imaging.
  • the pattern of each first through hole 310 may be set to be circular, the transparent region 110 may also be set to be circular, and the transparent region 110 is arranged concentrically with the corresponding first through hole 310.
  • the diameter of the first through hole 310 needs to meet the requirement of the small hole diameter in the imaging principle of the small hole.
  • the diameter of the first through hole 310 can be set to 6 ⁇ m to 20 ⁇ m; for example, the first through hole 310 The diameter can be set to 6 ⁇ m; or 10 ⁇ m or 20 ⁇ m.
  • the specific value of the diameter of the first through hole 310 needs to be designed and determined according to the actual application environment, which is not limited herein.
  • fingerprint recognition when fingerprint recognition is performed, light emitted from the pixel unit is irradiated on the fingerprint of the finger, and the fingerprint reflects the irradiated light, and the small-hole imaging principle is adopted at the photodetector 500 through the first through hole 310 After imaging is performed on the image sensor, a fingerprint image is determined according to the acquired image by acquiring an image imaged by the photodetector 500; and fingerprint recognition is performed according to the determined fingerprint image to implement a fingerprint recognition function.
  • FIG. 2b is a schematic diagram of the polarization state of the light corresponding to the structure shown in FIG. 2a.
  • the light emitted by the pixel unit in the display panel 100 is approximately natural light, and after passing through the first phase retarder 210 The light is still natural light, and then the light after passing through the linear polarizer 220 is converted into linear polarized light.
  • the passing light as a horizontally polarized light as an example, the light after the horizontally polarized light passes through the second phase retarder 300 can be changed into Right-handed circularly polarized light (the right-handed circularly polarized light is taken as an example in the figure).
  • the right-handed circularly polarized light can be converted into left-handed circularly polarized light by being reflected by a finger.
  • the left-handed circularly polarized light passes through the first phase retarder 300 on the second phase retarder 300.
  • a through hole 310 is still left-handed circularly polarized light, and then the left-handed circularly polarized light is converted into linearly polarized light after passing through the linear polarizer 220.
  • the linearly polarized light passes through the first phase retarder 210 and becomes circularly polarized light (right-handed Polarized light as an example).
  • the left-handed circularly polarized light reflected by a finger that does not pass through the first through hole 310 becomes linearly polarized light through the second phase retarder 300, but the vibration direction of the linearly polarized light after passing through the second phase retarder 300 and the linear polarizer 220
  • the direction of the transmission axis is vertical, so that the light reflected by the finger cannot enter the photodetector 500 through a path other than the first through hole 310, thereby improving the accuracy of the imaging of the small hole.
  • the first through hole 310 is a via hole penetrating through the second phase retarder 300, and a plurality of first through holes 310 included in the second phase retarder 300 can be evenly distributed.
  • the first through holes 310 may be uniformly distributed throughout the second phase retarder 300; or may be uniformly distributed only in a specific region in the second phase retarder 300, which is not specifically limited herein.
  • each of the first through holes 310 may be arranged in an array to be disposed in the second phase retarder 300.
  • the center distance between two adjacent first through holes can be designed and determined according to the actual application environment, which is not limited herein.
  • the image formed through the center of the pinhole is clearer, and the imaging is more blurred as it goes to the edge. Therefore, an image formed by fingerprints in the photodetector through multiple first through holes can be obtained.
  • the image formed by the acquired fingerprint through multiple first through holes generally exists in the same fingerprint area, that is, the common imaging part. In this way, when determining the fingerprint image, the acquired image formed by multiple first through holes is used. Images are extracted and processed to stitch the resulting fingerprint images, so as to integrate a complete and clear fingerprint image for fingerprint identification, thereby improving accuracy.
  • the transparent area needs to be set at a position that will not be blocked by the pixel unit and the trace; otherwise, the effect of imaging the small hole will be affected, or even the imaging on the photodetector 500 cannot be performed.
  • the transparent region may be a hollowed-out region in a display panel. In the actual preparation process, a portion corresponding to the transparent area of the base substrate is cut or etched to make it a hollow area by cutting or etching.
  • the orthogonal projection of each transparent region on the display panel and the orthogonal projection of each pixel unit and each trace on the display panel are not overlapped, so that the base substrate can not be cut, but by The pixel unit, the film layer, and the wiring are avoided to form a transparent area.
  • the linear polarizer 220, the first phase retarder 210, and the display panel 100 can be made as much as possible.
  • the thickness of the circular polarizer composed of the first phase retarder 210 and the linear polarizer 220 may range from 60 ⁇ m to 100 ⁇ m.
  • the thicknesses of the linear polarizer 220, the first phase retarder 210, and the display panel 100 can be designed and determined according to the actual application environment, which is not limited herein.
  • the photodetector 500 is disposed on the backlight surface of the display panel 100 and is disposed corresponding to the first through hole 310.
  • the photodetector 500 and the first through hole 310 are respectively located on two sides of the display panel 100, and the photodetector 500 is located at a position corresponding to the first through hole 310, which facilitates imaging on the photodetector 500.
  • a light-sensing detector may be provided in the display module, the light-sensing detector corresponding to all the first through holes, and the orthographic projection of the light-sensing detector on the display panel covers all the first through-holes.
  • a plurality of photodetectors may be provided in the display module. Each photodetector corresponds to each first through hole, and the orthographic projection of the photodetector on the display panel covers the corresponding first pass.
  • each light detector is arranged corresponding to one first through hole, and in addition, one light detector can also be corresponding to a plurality of first through holes. In practical applications, this needs to be designed and determined according to the specific actual application environment, which is not limited here.
  • the light-sensing detector may include a Charge-Coupled Device (CCD) photosensitive image sensor or a Complementary Metal-Oxide-Semiconductor (CMOS) photosensitive image sensor .
  • CCD Charge-Coupled Device
  • CMOS Complementary Metal-Oxide-Semiconductor
  • the light-sensing detector may also use any other photosensitive image sensor capable of identifying fingerprints, which is not specifically limited herein.
  • FIG. 3a is a schematic structural diagram of a first through-hole provided in an online polarizer only.
  • the display module shown in FIG. 3a and the display module shown in FIG. 2a have different implementation positions except that the first through-holes have different positions.
  • the methods are the same, and only the differences between the structure shown in FIG. 3a and FIG. 2a will be described below, and the similarities are not described herein.
  • the linear polarizer 220 may include a plurality of first through holes 221 for implementing small hole imaging;
  • the display area of the display panel may further include: a transparent area 110 corresponding to each of the first through holes 221; an orthographic projection of the transparent area 110 on the display panel 100 and an orthographic projection of the corresponding first through hole 221 on the display panel 100 have Overlapping area
  • the display module may further include a photo sensor 500 for receiving an image formed by a fingerprint through the first through hole 221.
  • the front projection of the transparent region 110 on the display panel 100 may cover the front projection of the corresponding first through hole 221 on the display panel 100.
  • fingerprint recognition when fingerprint recognition is performed, light emitted from a pixel unit is irradiated on a finger's fingerprint, and the fingerprint reflects the irradiated light, and the light-sensing detector 500 is passed through the first through hole 221 using a small-hole imaging principle. For imaging. After that, by acquiring an image imaged by the light sensor 500, a fingerprint image is determined according to the acquired image; and fingerprint recognition is performed according to the determined fingerprint image to implement a fingerprint recognition function.
  • FIG. 3b is a schematic diagram of the polarization state of the light corresponding to the structure shown in FIG. 3a.
  • the difference from FIG. 2b is that the left-handed circularly polarized light reflected by the finger passes through the second phase retarder 300 and becomes linearly polarized light.
  • the linearly polarized light is still linearly polarized after passing through the first through hole 221 in the linearly polarizing plate 220, and the linearly polarized light is converted into circularly polarized light after passing through the first phase retarder 210 (right-handed polarized light is taken as an example in the figure) .
  • the linearly polarized light that is obtained after the light reflected by the finger passes through the second phase retarder 300 and does not pass through the first through hole 221 cannot pass because the vibration direction and the transmission axis direction of the linear polarizer 220 are perpendicular, so that The light reflected by the finger cannot enter the photodetector 500 through a path other than the first through hole 310, so that the accuracy of the small hole imaging can be improved.
  • the first through hole 221 is a via hole penetrating the linear polarizer 220.
  • the plurality of first through holes 221 included in the linear polarizer 220 may be uniformly distributed.
  • the first through holes 221 may be uniformly distributed in the entire linear polarizing plate 220; or may be uniformly distributed only in a specific area in the linear polarizing plate 220, which is not specifically limited herein.
  • each first through hole 221 may be arranged in an array to be disposed in the linear polarizer 220.
  • the center distance between two adjacent first through holes can be designed and determined according to the actual application environment, which is not limited herein.
  • d 0 represents the diameter of the first through hole 221
  • ⁇ represents the maximum imaging angle (that is, the angle between the outermost light and the normal line in the beam after passing through the first through hole 221 in small hole imaging)
  • h represents linear polarization
  • FIG. 4a is a schematic structural diagram of a first through hole provided in both the second phase retarder and the linear polarizer.
  • the second phase retarder 300 and the linear polarizer 220 include a plurality of first through holes 320 for achieving small hole imaging;
  • the display area of the display panel may further include: a transparent area 110 corresponding to each of the first through holes 320; an orthographic projection of the transparent area 110 on the display panel 100 and an orthographic projection of the corresponding first through hole 320 on the display panel 100 have Overlapping area
  • the display module may further include a photo sensor 500 for receiving an image formed by a fingerprint through the first through hole 320.
  • the orthographic projection of the transparent region 110 on the display panel 100 may cover the orthographic projection of the corresponding first through hole 320 on the display panel 100.
  • fingerprint recognition when fingerprint recognition is performed, light emitted from the pixel unit is irradiated on the fingerprint of the finger, and the fingerprint reflects the irradiated light, and the photodetector 500 is passed through the first through hole 320 using the small hole imaging principle. For imaging. After that, by acquiring an image imaged by the light sensor 500, a fingerprint image is determined according to the acquired image; and fingerprint recognition is performed according to the determined fingerprint image to implement a fingerprint recognition function.
  • FIG. 4b is a schematic diagram of the polarization state of the light corresponding to the structure shown in FIG. 4a.
  • the difference from FIG. 2b is that the left-handed circularly polarized light reflected by the finger passes through the first of the second phase retarder 300 and the linear polarizer 220.
  • the through-hole 320 is still left-handed circularly polarized light, and the left-handed circularly polarized light passes through the first phase retarder 210 and becomes linearly polarized light.
  • the linearly polarized light obtained by the light reflected by a finger without passing through the first through hole 320 passing through the second phase retarder 300 cannot pass because the vibration direction and the transmission axis direction of the linear polarizer 220 are perpendicular, so that The light reflected by the finger cannot enter the photodetector 500 through a path other than the first through hole 320, so that the accuracy of the small hole imaging can be improved.
  • the first through hole 320 is a via hole penetrating the second phase retarder 300 and the linear polarizer 220.
  • the plurality of first through holes 320 included in the second phase retarder 300 and the linear polarizer 220 may be uniformly distributed.
  • the first through holes 320 may be uniformly distributed throughout the second phase retarder 300 and the linear polarizer 220; or, the first through holes 320 may be uniformly distributed only in a specific one of the second phase retarder 300 and the linear polarizer 220 The area is not specifically limited here.
  • each of the first through holes 320 may be arranged in an array to be disposed in the second phase retarder 300 and the linear polarizer 220.
  • the center distance between two adjacent first through holes can be designed and determined according to the actual application environment, which is not limited herein.
  • d 0 represents the diameter of the first through hole 320
  • ⁇ represents the maximum imaging angle (that is, the angle between the outermost light and the normal line in the beam after passing through the first through hole 320 in small-hole imaging)
  • h represents linear polarization
  • the first phase retarder 210 may include second through holes 211 corresponding to each of the first through holes 310;
  • the orthographic projection of the second through hole 211 on the display panel 100 and the orthographic projection of the corresponding first through hole 310 on the display panel 100 have overlapping areas.
  • the first phase retarder 210 includes a second through hole 211. Part of the structure is the same as that of FIG.
  • the polarization state of the light corresponding to the structure shown in FIG. 5 is similar to that in FIG. 2 b, except that the linearly polarized light obtained after the light reflected by the finger passes through the linear polarizer 220 is linearly polarized after passing through the second through hole 211 .
  • the orthographic projection of the second through hole 211 on the display panel 100 may cover the orthographic projection of the corresponding first through hole 310 on the display panel 100.
  • the second through hole is a circle concentrically provided with the corresponding first through hole.
  • FIG. 6 is a schematic structural diagram of another display module according to an embodiment of the present disclosure. As shown in FIG. 6, the structure shown in FIG. 6 is different from the structure shown in FIG. 3 a in that the first phase is delayed in FIG. 6.
  • the sheet includes a second through hole, and only the differences between the structure shown in FIG. 6 and FIG. 3a will be described below, and the similarities are not described herein.
  • the first phase retarder 210 may include second through holes 211 corresponding to each of the first through holes 221; wherein, the second through holes 211
  • the orthographic projection on the display panel 100 and the corresponding orthographic projection of the first through hole 221 on the display panel 100 have overlapping areas.
  • the orthographic projection of the second through hole 211 on the display panel 100 may cover the orthographic projection of the corresponding first through hole 221 on the display panel 100.
  • the polarization state of the light corresponding to the structure shown in FIG. 6 is similar to that of FIG. 3 b, except that the linearly polarized light obtained after the light reflected by the finger passes through the linear polarizer 220 is still linearly polarized after passing through the second through hole 211.
  • the second through hole is a circle concentrically provided with the corresponding first through hole.
  • the second through hole is a circle concentrically provided with the corresponding first through hole.
  • FIG. 7 is a schematic structural diagram of another display module according to an embodiment of the present disclosure. As shown in FIG. 7, the structure shown in FIG. 7 is different from the structure shown in FIG. 4 a in that the first phase is delayed in FIG. 7.
  • the sheet includes a second through hole. Only the differences between the structure shown in FIG. 7 and FIG. 4a will be described below, and the similarities are not described herein.
  • the first phase retarder 210 may include second through holes 211 corresponding to each of the first through holes 320; wherein, the second through holes 211
  • the orthographic projection on the display panel 100 and the orthographic projection of the corresponding first through hole 320 on the display panel 100 may cover the orthographic projection of the corresponding first through hole 320 on the display panel 100.
  • the polarization state of the light corresponding to the structure shown in FIG. 7 is similar to that of FIG. 4 b, except that the circularly polarized light obtained after the light reflected by the finger passes through the linear polarizer 220 is still circularly polarized after passing through the second through hole 211.
  • the second through hole is a circle concentrically provided with the corresponding first through hole.
  • the second through hole is a circle concentrically provided with the corresponding first through hole.
  • an embodiment of the present disclosure further provides a display device, including any one of the foregoing display modules provided by the embodiments of the present disclosure. Since the principle of the display device for solving the problem is similar to the foregoing display module, the implementation of the display device can refer to the above-mentioned embodiment of the display module, and duplicated details will not be repeated.
  • the display device provided in the embodiments of the present disclosure may be any product or component having a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • Other essential components of the display device are understood by those of ordinary skill in the art, and are not repeated here, and should not be used as a limitation on the present disclosure.
  • a second phase retarder is provided on the side of the online polarizer facing away from the display panel.
  • the light emitted from the display panel passes through the first phase retarder and the linear polarizer and becomes linear.
  • the polarized light is converted into circularly polarized light after passing through the second phase retarder.

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Abstract

一种显示模组及显示装置，该显示模组，包括：显示面板（100），显示面板（100）为有机电致发光显示面板；第一相位延迟片（210），位于显示面板（100）的出光面一侧；线偏振片（220），位于第一相位延迟片（210）背离显示面板（100）的一侧；第二相位延迟片（300），覆盖于线偏振片（220）背离显示面板（100）一侧。

Description

显示模组及显示装置
本申请要求在2018年07月27日提交中国专利局、申请号为201810841674.2、发明名称为“一种显示模组及显示装置”的中国专利申请的优先权，其全部内容以引入的方式并入本申请中。
技术领域
本公开涉及显示技术领域，尤其涉及一种显示模组及显示装置。
背景技术
目前，电子设备的显示屏的出光侧上一般会设置有圆偏光片，使得透过圆偏振片后的光为线偏振光。然而，目前市场上的偏光式太阳镜相当于线性偏光片，其吸收轴为水平方向(即0°)或者垂直方向(即90°)。在透过圆偏振片后的光的偏振方向与偏光式太阳镜的吸收轴平行时，会导致透过圆偏振片后的光被偏光式太阳镜吸收，从而造成人眼无法看到光线，进而导致无法看到显示屏上的画面，因此大大降低了用户体验。
发明内容
本公开实施例提供的一种显示模组，其中，包括：
显示面板，所述显示面板为有机电致发光显示面板；
第一相位延迟片，位于所述显示面板的出光面一侧；
线偏振片，位于所述第一相位延迟片背离所述显示面板的一侧；
第二相位延迟片，覆盖于所述线偏振片背离所述显示面板一侧。
可选地，在本公开实施例中，所述第二相位延迟片和所述线偏振片中至少之一包括多个用于实现小孔成像的第一通孔；
所述显示面板的显示区包括：与各所述第一通孔一一对应的透明区域；所述透明区域在所述显示面板的正投影与对应的第一通孔在所述显示面板的正投影具有交叠区域；
所述显示模组还包括：用于接收指纹通过所述第一通孔所成的像的光感探测器。
可选地，在本公开实施例中，所述透明区域在所述显示面板的正投影覆盖对应的所述第一通孔在所述显示面板的正投影。
可选地，在本公开实施例中，各所述第一通孔为圆形；所述透明区域为与对应的所述第一通孔同心设置的圆形。
可选地，在本公开实施例中，所述透明区域的直径d 1满足如下公式：d 1＝d 0+2htanθ；其中，d 0代表所述第一通孔的直径，θ代表最大成像视角；
在所述第二相位延迟片包括第一通孔时，h代表所述第二相位延迟片面向所述显示面板的下表面与所述显示面板背离所述第二相位延迟片的下表面之间的距离；
在所述线偏振片包括第一通孔或所述第二相位延迟片和所述线偏振片包括第一通孔时，h代表所述线偏振片面向所述显示面板的下表面与所述显示面板面背离述第二相位延迟片的下表面之间的距离。
可选地，在本公开实施例中，所述第一通孔的直径的取值范围为6μm～20μm。
可选地，在本公开实施例中，所述第一相位延迟片包括与各所述第一通孔一一对应的第二通孔；
所述第二通孔在所述显示面板的正投影与对应的第一通孔在所述显示面板的正投影具有交叠区域。
可选地，在本公开实施例中，所述第二通孔在所述显示面板的正投影覆盖对应的所述第一通孔在所述显示面板的正投影。
可选地，在本公开实施例中，所述第二通孔为与对应的所述第一通孔同心设置的圆形。
可选地，在本公开实施例中，第二通孔的直径d 2满足如下公式：d 2＝d 0+2h’tanθ；其中，d 0代表第一通孔的直径，θ代表最大成像视角；
在所述第二相位延迟片包括第一通孔时，h’代表所述第二相位延迟片面向 所述显示面板的下表面与所述第一相位延迟片面向所述显示面板的下表面之间的距离；
在所述线偏振片包括第一通孔或所述第二相位延迟片和所述线偏振片包括第一通孔时，h’代表所述第一相位延迟片面向所述显示面板的下表面与所述第一相位延迟片背离所述显示面板的上表面之间的距离。
可选地，在本公开实施例中，所述第一相位延迟片和所述第二相位延迟片均为1/4λ波片。
可选地，在本公开实施例中，所述线偏振片的透过轴方向与所述第二相位延迟片的光轴夹角为正负45°；
所述线偏振片的透过轴方向与所述第一相位延迟片的光轴夹角为正负45°。
可选地，在本公开实施例中，所述显示面板还包括：多个像素单元和设置于相邻两个所述像素单元间隙中的走线；
各所述像素单元和各所述走线在所述显示面板的正投影与各所述透明区域在显示面板的正投影均不交叠。
可选地，在本公开实施例中，所述光感探测器包括电荷耦合感光图像传感器或互补金属氧化物半导体感光图像传感器。
可选地，在本公开实施例中，所述光感探测器设置于所述显示面板的背光面且与所述第一通孔对应设置。
可选地，在本公开实施例中，所述光感探测器为一个，所述光感探测器对应于所有的所述第一通孔，所述光感探测器在所述显示面板的正投影覆盖所有的所述第一通孔在所述显示面板上的正投影；或，
所述光感探测器为多个，各所述光感探测器与各所述第一通孔一一对应，所述光感探测器在所述显示面板的正投影覆盖对应的所述第一通孔在所述显示面板上的正投影。
相应地，本公开实施例还提供了一种显示装置，包括上述显示模组。
附图说明
图1为本公开实施例提供的显示模组的结构示意图之一；
图2a为本公开实施例提供的显示模组的结构示意图之二；
图2b为对应于图2a所示结构的光线的偏振态的示意图；
图3a为本公开实施例提供的显示模组的结构示意图之三；
图3b为对应于图2a所示结构的光线的偏振态的示意图；
图4a为本公开实施例提供的显示模组的结构示意图之四；
图4b为对应于图2a所示结构的光线的偏振态的示意图；
图5为本公开实施例提供的显示模组的结构示意图之五；
图6为本公开实施例提供的显示模组的结构示意图之六；
图7为本公开实施例提供的显示模组的结构示意图之七。
具体实施方式
为了使本公开的目的，技术方案和优点更加清楚，下面结合附图，对本公开实施例提供的显示模组及显示装置的具体实施方式进行详细地说明。应当理解，下面所描述的实施例仅用于说明和解释本公开，并不用于限定本公开。并且在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。需要注意的是，附图中各层薄膜厚度和形状不反映显示模组的真实比例，目的只是示意说明本公开内容。并且自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。
本公开实施例提供了一种显示模组，如图1所示，包括：
显示面板100，该显示面板100为有机电致发光显示面板；
第一相位延迟片210，位于显示面板100的出光面一侧；
线偏振片220，位于第一相位延迟片210背离显示面板100的一侧；
第二相位延迟片300，覆盖于线偏振片220背离显示面板100一侧。
本公开实施例提供的显示模组，通过在线偏振片背离显示面板的一侧设置第二相位延迟片，由于显示面板出射的光通过第一相位延迟片和线偏振片 后变为线偏振光，该线偏振光再通过第二相位延迟片后转换为圆偏振光。由于圆偏振光可以透过线偏振片，这样在人戴着偏光式太阳镜时，不论偏光式太阳镜的吸收轴是水平方向还是垂直方向，总会有光透过偏光式太阳镜入射到人眼中，从而使观察者可以看到显示面板显示的画面。
有机电致发光(Organic Light Emitting Diode，OLED)，或称为有机发光二极管具有低能耗、生产成本低、自发光、宽视角及响应速度快等优点。在具体实施时，在本公开实施例中，显示面板可以为OLED显示面板。具体地，显示面板可以包括多个像素单元和设置于相邻两个像素单元之间的间隙中的走线。像素单元具有有机发光二极管(OLED)和用于驱动OLED发光的像素电路。走线用于向像素电路输入各种驱动信号。进一步地，显示面板可以为刚性显示面板，例如，显示面板的衬底基板可以为玻璃基板、蓝宝石基板、石英基板、塑料基板等；或者，显示面板也可以为柔性显示面板，例如，显示面板的衬底基板可以采用PI基板，在此不作限定。
在实际应用中，一般采用第一相位延迟片和线偏振片来解决显示面板反射外界环境光的问题。具体地，外界环境光一般为自然光，外界环境光经过线偏振片时，只有振动方向平行于线偏振片的透过轴的光线能够透过线偏振片，而且，自然光经过第二相位延迟片后不会改变偏振态仍为自然光，因而，外界环境光经过第二相位延迟片后仍为自然光，外界环境光经过线偏振片后只有一半光可以通过，以通过的光为水平偏振光为例，该水平偏振光经过第一相位延迟片后的光可以变为右旋圆偏振光(以右旋光为例)，该右旋圆偏振光经由显示面板反射可以变为左旋圆偏振光，左旋圆偏振光经过第一相位延迟片变为线偏振光，然而经过第一相位延迟片后的线偏振光的振动方向和线偏振片的透过轴方向是垂直的，从而使得经由显示面板反射的光无法通过线偏振片，进而解决显示面板反射环境光的问题，提高显示效果。
具体地，本公开实施例中上述第一相位延迟片和第二相位延迟片可以为1/4λ波片，也可以为其他相位延迟片，此处不做限定。在具体实施时，为了得到圆偏振光，在本公开实施例中，可以将线偏振片的透过轴方向与第二相 位延迟片的光轴夹角为正负45°，以使透过线偏振片的偏振光再通过第二相位延迟片后转换为圆偏振光，同理，也可以将线偏振片的透过轴方向设置为与第一相位延迟片的光轴夹角为正负45°。具体地，一般显示面板发出的光近似为自然光，再经过第一相位延迟片210后的光仍为自然光，之后再经过线偏振片220后的光转换为线偏振光，由于转换后的线偏振光的振动方向与第二相位延迟片300的光轴夹角可以为正负45°，使得转换为线偏振光的光经过第二相位延迟片300后可以转换成圆偏振光，由于圆偏振光可以透过线偏振片，因而显示模组出射的光线可以透过偏振式太阳镜射入到人眼中。
指纹是人体与生俱来独一无二并可与他人相区别的不变特征，它由指端皮肤表面上的一系列脊和谷组成，这些脊和谷的组成细节决定了指纹图案的唯一性。由之发展起来的带有指纹识别功能的显示面板已经被用于个人身份验证上，增加了显示模组的信息安全性。因此可以使显示模组集成指纹识别功能。下面结合具体实施例，对本公开集成指纹识别功能的实施方式进行详细说明。需要说明的是，本实施例仅是为了更好的解释本公开，但不限制本公开。
一般为了对器件进行保护，在具体实施时，在本公开实施例中，如图2a所示，显示模组还可以包括设置于第二相位延迟片300背离显示面板100一侧的保护盖板400。
进一步地，在本公开实施例中，第二相位延迟片和线偏振片中至少之一包括多个用于实现小孔成像的第一通孔；
显示面板的显示区包括：与各第一通孔一一对应的透明区域；透明区域在显示面板的正投影与对应的第一通孔在显示面板的正投影具有交叠区域；
显示模组还包括：用于接收指纹通过第一通孔所成的像的光感探测器。
图2a为仅在第二相位延迟片中设置第一通孔的结构示意图，具体地，在本公开实施例中，如图2a所示，第二相位延迟片300可以包括多个用于实现小孔成像的第一通孔310；
显示面板的显示区可以包括：与各第一通孔310一一对应的透明区域110； 透明区域110在显示面板100的正投影与对应的第一通孔310在显示面板100的正投影具有交叠区域；
显示模组还可以包括：用于接收指纹通过第一通孔310所成的像的光感探测器500。
进一步地，为了提高小孔成像的精准度，可以使透明区域110在显示面板100的正投影覆盖对应的第一通孔310在显示面板100的正投影。
在实际应用中，第一通孔的图形可以为能够实现小孔成像原理的任意图形。进一步地，各第一通孔310的图形可以设置为圆形，透明区域110也可以设置为圆形，且透明区域110与对应的第一通孔310同心设置。需要说明的是，该第一通孔310的直径需要满足小孔成像原理中对小孔直径的要求，例如可以将第一通孔310的直径设置为6μm～20μm；例如，第一通孔310的直径可以设置为6μm；或者10μm或者20μm。在实际应用中，第一通孔310的直径的具体数值需要根据实际应用环境来设计确定，在此不作限定。
具体地，在进行指纹识别时，是通过像素单元发射出的光照射在手指的指纹上，指纹将所照射的光进行反射，采用小孔成像原理通过第一通孔310在光感探测器500上进行成像，之后、通过获取光感探测器500成像的图像，根据获取到的图像确定指纹图像；根据确定出的指纹图像进行指纹识别，以实现指纹识别功能。
具体地，图2b为对应于图2a所示结构的光线的偏振态的示意图，如图2b所示，显示面板100中的像素单元发出的光近似为自然光，再经过第一相位延迟片210后的光仍为自然光，之后再经过线偏振片220后的光转换为线偏振光，以通过的光为水平偏振光为例，该水平偏振光经过第二相位延迟片300后的光可以变为右旋圆偏振光(图中以右旋圆偏振光为例)，该右旋圆偏振光经由手指反射可以变为左旋圆偏振光，该左旋圆偏振光经过第二相位延迟片300上的第一通孔310仍为左旋圆偏振光，然后该左旋圆偏振光经过线偏振片220后转换为线偏振光，该线偏振光经过第一相位延迟片210后变为圆偏振光(以右旋偏振光为例)。而手指反射的未通过第一通孔310的左旋圆 偏振光经过第二相位延迟片300变为线偏振光，然而经过第二相位延迟片300后的线偏振光的振动方向和线偏振片220的透过轴方向是垂直的，从而使得经由手指反射的光无法通过除第一通孔310以外的路径，进入到光感探测器500上，从而可以提高小孔成像的精确度。
在具体实施时，在本公开实施例中，第一通孔310为贯穿第二相位延迟片300的过孔，并且，可以使第二相位延迟片300包括的多个第一通孔310均匀分布。具体地，第一通孔310可以均匀的分布于整个第二相位延迟片300中；或者，也可以仅均匀分布于第二相位延迟片300中的某个特定的区域内，在此不作具体限定。进一步地，各第一通孔310可以呈阵列排布以设置于在第二相位延迟片300中。此外，相邻两个第一通孔的中心距离可以根据实际应用环境来设计确定，在此不作限定。
一般，在利用小孔成像原理进行成像时，通过小孔中心成的像较为清晰，越往边缘成像越模糊，因此可以获取光感探测器中指纹通过多个第一通孔所成的像。然而获取到的指纹通过多个第一通孔所成的像一般存在指纹相同的区域，即共成像部分，这样在确定指纹图像时，通过对获取到的通过多个第一通孔所成的像进行提取和处理，以对所成的指纹图像进行拼接，从而整合出完整清晰的指纹图像，以便进行指纹识别，从而提高准确性。
一般透明区域需要设置在不会被像素单元和走线遮挡的位置，否则会影响小孔成像的效果，或者，甚至导致不能够在光感探测器500上成像。在具体实施时，在本公开实施例中，透明区域可以为显示面板中的镂空区域。在实际制备过程中，采用切割或刻蚀的方式将衬底基板对应透明区域的部分进行挖孔使其成为镂空区域。或者，通过使各透明区域在显示面板的正投影与各像素单元和各走线在显示面板上的正投影均不交叠，这样可以不对衬底基板进行切割，而是通过使衬底基板上的像素单元、膜层以及走线进行避让，形成透明区域。
为了进一步降低影响小孔成像的效果，在具体实施时，在本公开实施例中，如图2a所示，透明区域110的直径d 1可以满足如下公式：d 1＝d 0+2htanθ； 其中，d 0代表第一通孔310的直径，θ代表最大成像视角(即小孔成像中通过第一通孔后的光束中最边缘的光与法线之间的夹角)，h代表第二相位延迟片300面向显示面板100的下表面S1与显示面板100背离第二相位延迟片300一侧的下表面S2之间的距离。这样可以使所有通过第一通孔310的光通过对应的透明区域110入射到光感探测器500上。
在具体实施时，在本公开实施例提供的上述显示模组中，为了提高各指纹识别单元进行指纹识别的分辨精度，可以使线偏振片220、第一相位延迟片210以及显示面板100尽可能的薄。例如由第一相位延迟片210和线偏振片220组成的圆偏振片的厚度的范围可以为60μm～100μm。在实际应用中，线偏振片220、第一相位延迟片210以及显示面板100的厚度可以根据实际应用环境来设计确定，在此不作限定。
在具体实施时，在本公开实施例中，如图2a所示，光感探测器500设置于显示面板100的背光面且与第一通孔310对应设置。具体地，光感探测器500与第一通孔310分别位于显示面板100的两侧，并且光感探测器500位于与第一通孔310对应的位置，便于在光感探测器500进行成像。
在具体实施时，在显示模组中可以设置一个光感探测器，该光感探测器对应于所有的第一通孔，且该光感探测器在显示面板的正投影覆盖所有的第一通孔在显示面板上的正投影，通过各第一通孔在光感探测器的各区域内进行成像，再通过对该光感探测器各区域的成像进行处理，从而达到对指纹进行识别的功能。或者，在显示模组中也可以设置多个光感探测器，各光感探测器与各第一通孔一一对应，且光感探测器在显示面板上的正投影覆盖对应的第一通孔在显示面板上的正投影，也就是，使每一个光感探测器与一个第一通孔对应设置，此外，也可以使一个光感探测器对应多个第一通孔。在实际应用中，这需要根据具体实际应用环境来设计确定，在此不作限定。
在具体实施时，在本公开实施例中，光感探测器可以包括电荷耦合(Charge-coupled Device，CCD)感光图像传感器或互补金属氧化物半导体(Complementary Metal-Oxide-Semiconductor，CMOS)感光图像传感器。当 然，光感探测器也可以采用其他任何一种能够实现对指纹进行识别的感光图像传感器，在此不作具体限定。
图3a为仅在线偏振片中设置第一通孔的结构示意图，图3a中所示的显示模组与图2a所示的显示模组，除第一通孔的具体设置位置不同外，其他实施方式相同，下面仅说明图3a所示的结构与图2a的区别之处，其相同之处在此不作赘述。
在具体实施时，在本公开实施例中，如图3a所示，线偏振片220可以包括多个用于实现小孔成像的第一通孔221；
显示面板的显示区还可以包括：与各第一通孔221一一对应的透明区域110；透明区域110在显示面板100的正投影与对应的第一通孔221在显示面板100的正投影具有交叠区域；
并且，显示模组还可以包括：用于接收指纹通过第一通孔221所成的像的光感探测器500。
进一步地，为了提高小孔成像的精准度，可以使透明区域110在显示面板100的正投影覆盖对应的第一通孔221在显示面板100的正投影。
具体地，在进行指纹识别时，是通过像素单元发射处的光照射在手指的指纹上，指纹将所照射的光进行反射，采用小孔成像原理通过第一通孔221在光感探测器500上进行成像。之后、通过获取光感探测器500成像的图像，根据获取到的图像确定指纹图像；根据确定出的指纹图像进行指纹识别，以实现指纹识别功能。
图3b为对应于图3a所示结构的光线的偏振态的示意图，与图2b不同之处在于，手指反射得到的左旋圆偏振光经过第二相位延迟片300后变为线偏振光，然后该线偏振光经过线偏振片220上的第一通孔221后仍为线偏振光，该线偏振光经过第一相位延迟片210后变为圆偏振光(图中以右旋偏振光为例)。而手指反射的光线通过第二相位延迟片300后得到的未通过第一通孔221的线偏振光，由于振动方向和线偏振片220的透过轴方向是垂直的而无法通过，从而使得经由手指反射的光无法通过除第一通孔310以外的路径，进入 到光感探测器500上，从而可以提高小孔成像的精确度。
在具体实施时，在本公开实施例中，第一通孔221为贯穿线偏振片220的过孔。并且，可以使线偏振片220包括的多个第一通孔221均匀分布。其中，第一通孔221可以均匀的分布于整个线偏振片220中；或者，也可以仅均匀分布于线偏振片220中的某个特定的区域内，在此不作具体限定。进一步地，各第一通孔221可以呈阵列排布以设置于在线偏振片220中。并且，相邻两个第一通孔的中心距离可以根据实际应用环境来设计确定，在此不作限定。
为了进一步降低影响小孔成像的效果，在具体实施时，在本公开实施例中，如图3a所示，透明区域110的直径d 1可以满足如下公式：d 1＝d 0+2htanθ；其中，d 0代表第一通孔221的直径，θ代表最大成像视角(即小孔成像中通过第一通孔221后的光束中最边缘的光与法线之间的夹角)，h代表线偏振片220面向显示面板100的下表面S3与显示面板100背离第二相位延迟片300一侧的下表面S2之间的距离。这样可以使所有通过第一通孔221的光通过对应的透明区域110入射到光感探测器500上。
图4a为在第二相位延迟片和线偏振片中均设置第一通孔的结构示意图，图4a中所示的显示模组与图2a所示的显示模组，除第一通孔的具体设置位置不同外，其他实施方式相同，下面仅说明图4a所示的结构与图2a的区别之处其相同之处在此不作赘述。
在具体实施时，在本公开实施例中，如图4a所示，第二相位延迟片300和线偏振片220包括多个用于实现小孔成像的第一通孔320；
显示面板的显示区还可以包括：与各第一通孔320一一对应的透明区域110；透明区域110在显示面板100的正投影与对应的第一通孔320在显示面板100的正投影具有交叠区域；
并且，显示模组还可以包括：用于接收指纹通过第一通孔320所成的像的光感探测器500。
进一步地，为了提高小孔成像的精准度，可以使透明区域110在显示面 板100的正投影覆盖对应的第一通孔320在显示面板100的正投影。
具体地，在进行指纹识别时，是通过像素单元发射处的光照射在手指的指纹上，指纹将所照射的光进行反射，采用小孔成像原理通过第一通孔320在光感探测器500上进行成像。之后、通过获取光感探测器500成像的图像，根据获取到的图像确定指纹图像；根据确定出的指纹图像进行指纹识别，以实现指纹识别功能。
图4b为对应于图4a所示结构的光线的偏振态的示意图，与图2b不同之处在于，手指反射得到的左旋圆偏振光经过第二相位延迟片300和线偏振片220中的第一通孔320后仍为左旋圆偏振光，该左旋圆偏振光经过第一相位延迟片210后变为线偏振光。而手指反射的未经过第一通孔320的光线通过第二相位延迟片300后得到的线偏振光，由于振动方向和线偏振片220的透过轴方向是垂直的而无法通过，从而使得经由手指反射的光无法通过除第一通孔320以外的路径，进入到光感探测器500上，从而可以提高小孔成像的精确度。
在具体实施时，在本公开实施例中，第一通孔320为贯穿第二相位延迟片300和线偏振片220的过孔。并且，可以使第二相位延迟片300和线偏振片220包括的多个第一通孔320均匀分布。其中，第一通孔320可以均匀的分布于整个第二相位延迟片300和线偏振片220中；或者，也可以仅均匀分布于第二相位延迟片300和线偏振片220中的某个特定的区域内，在此不作具体限定。进一步地，各第一通孔320可以呈阵列排布以设置于在第二相位延迟片300和线偏振片220中。并且，相邻两个第一通孔的中心距离可以根据实际应用环境来设计确定，在此不作限定。
为了进一步降低影响小孔成像的效果，在具体实施时，在本公开实施例中，如图4a所示，透明区域110的直径d 1可以满足如下公式：d 1＝d 0+2htanθ；其中，d 0代表第一通孔320的直径，θ代表最大成像视角(即小孔成像中通过第一通孔320后的光束中最边缘的光与法线之间的夹角)，h代表线偏振片220面向显示面板100的下表面S3与显示面板100背离第二相位延迟片300一侧 的下表面S2之间的距离。这样可以使所有通过第一通孔320的光通过对应的透明区域110入射到光感探测器500上。
进一步地，在具体实施时，在本公开实施例中，如图5所示，第一相位延迟片210可以包括与各第一通孔310一一对应的第二通孔211；
其中，第二通孔211在显示面板100的正投影与对应的第一通孔310在显示面板100的正投影具有交叠区域。
图5所示的显示模组的结构与图2a所示的显示模组的结构的区别在于，图5所示的结构中，第一相位延迟片210包括第二通孔211，图5中其他部分的结构与图2a相同，重复之处不再赘述。并且，图5所示的结构对应的光线偏振态与图2b类似，不同之处在于，手指反射的光线通过线偏振片220后得到的线偏振光经过第二通孔211后仍为线偏振光。
进一步地，为了提高小孔成像的精准度，可以使第二通孔211在显示面板100的正投影覆盖对应的第一通孔310在显示面板100的正投影。
在具体实施时，在本公开实施例中，第二通孔为与对应的第一通孔同心设置的圆形。
为了进一步降低影响小孔成像的效果，在具体实施时，在本公开实施例中，如图5所示，第二通孔211的直径d 2可以满足如下公式：d 2＝d 0+2h’tanθ；其中，d 0代表第一通孔310的直径，θ代表最大成像视角，h’代表第二相位延迟片300面向显示面板100的下表面S1与第一相位延迟片210面向显示面板100的下表面S4之间的距离。这样可以使所有通过第一通孔310的光可以通过对应的第二通孔211入射到光感探测器500上。
图6为本公开实施例提供的另一种显示模组的结构示意图，如图6所示，图6所示的结构与图3a所示的结构的区别在于，在图6中第一相位延迟片中包括第二通孔，下面仅说明图6所示的结构与图3a的区别之处，其相同之处在此不作赘述。
在具体实施时，在本公开实施例中，如图6所示，第一相位延迟片210可以包括与各第一通孔221一一对应的第二通孔211；其中，第二通孔211在 显示面板100的正投影与对应的第一通孔221在显示面板100的正投影具有交叠区域。进一步地，为了提高小孔成像的精准度，可以使第二通孔211在显示面板100的正投影覆盖对应的第一通孔221在显示面板100的正投影。
图6所示的结构对应的光线偏振态与图3b类似，不同之处在于，手指反射的光线通过线偏振片220后得到的线偏振光经过第二通孔211后仍为线偏振光。
在具体实施时，在本公开实施例中，第二通孔为与对应的第一通孔同心设置的圆形。为了进一步降低影响小孔成像的效果，在具体实施时，在本公开实施例中，如图6所示，第二通孔211的直径d 2可以满足如下公式：d 2＝d 0+2h’tanθ；其中，d 0代表第一通孔221的直径，θ代表最大成像视角，h’代表第一相位延迟片210面向显示面板100的下表面S4与第一相位延迟片210背离显示面板100的上表面S5之间的距离，即h’代表第一相位延迟片210的厚度。这样可以使所有通过第一通孔221的光可以通过对应的第二通孔211入射到光感探测器500上。
图7为本公开实施例提供的另一种显示模组的结构示意图，如图7所示，图7所示的结构与图4a所示的结构的区别在于，在图7中第一相位延迟片中包括第二通孔，下面仅说明图7所示的结构与图4a的区别之处，其相同之处在此不作赘述。
在具体实施时，在本公开实施例中，如图7所示，第一相位延迟片210可以包括与各第一通孔320一一对应的第二通孔211；其中，第二通孔211在显示面板100的正投影与对应的第一通孔320在显示面板100的正投影。进一步地，为了提高小孔成像的精准度，可以使第二通孔211在显示面板100的正投影覆盖对应的第一通孔320在显示面板100的正投影。
图7所示的结构对应的光线偏振态与图4b类似，不同之处在于，手指反射的光线通过线偏振片220后得到的圆偏振光经过第二通孔211后仍为圆偏振光。
在具体实施时，在本公开实施例中，第二通孔为与对应的第一通孔同心 设置的圆形。为了进一步降低影响小孔成像的效果，在具体实施时，在本公开实施例中，如图7所示，第二通孔211的直径d 2可以满足如下公式：d 2＝d 0+2h’tanθ；其中，d 0代表第一通孔320的直径，θ代表最大成像视角，h’代表第一相位延迟片210面向显示面板100的下表面S4与第一相位延迟片210背离显示面板100的上表面S5之间的距离，即h’代表第一相位延迟片210的厚度。这样可以使所有通过第一通孔320的光可以通过对应的第二通孔211入射到光感探测器500上。
基于同一公开构思，本公开实施例还提供了一种显示装置，包括本公开实施例提供的上述任一种显示模组。由于该显示装置解决问题的原理与前述一种显示模组相似，该显示装置的实施可以参见上述显示模组的实施例，重复之处不再赘述。
在具体实施时，本公开实施例提供的显示装置可以为：手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。对于该显示装置的其它必不可少的组成部分均为本领域的普通技术人员应该理解具有的，在此不做赘述，也不应作为对本公开的限制。
本公开实施例提供的显示模组及显示装置，通过在线偏振片背离显示面板的一侧设置第二相位延迟片，由于显示面板出射的光通过第一相位延迟片和线偏振片后变为线偏振光，该线偏振光再通过第二相位延迟片后转换为圆偏振光。这样在人戴着偏光式太阳镜时，不论偏光式太阳镜的吸收轴是水平方向还是垂直方向，总会有光透过偏光式太阳镜入射到人眼中，从而使观察者可以看到显示面板显示的画面。
显然，本领域的技术人员可以对本公开实施例进行各种改动和变型而不脱离本公开实施例的精神和范围。这样，倘若本公开实施例的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (17)

  1. 一种显示模组，其中，包括：
    显示面板，所述显示面板为有机电致发光显示面板；
    第一相位延迟片，位于所述显示面板的出光面一侧；
    线偏振片，位于所述第一相位延迟片背离所述显示面板的一侧；
    第二相位延迟片，覆盖于所述线偏振片背离所述显示面板一侧。
  2. 如权利要求1所述的显示模组，其中，所述第二相位延迟片和所述线偏振片中至少之一包括多个用于实现小孔成像的第一通孔；
    所述显示面板的显示区包括：与各所述第一通孔一一对应的透明区域；所述透明区域在所述显示面板的正投影与对应的第一通孔在所述显示面板的正投影具有交叠区域；
    所述显示模组还包括：用于接收指纹通过所述第一通孔所成的像的光感探测器。
  3. 如权利要求2所述的显示模组，其中，所述透明区域在所述显示面板的正投影覆盖对应的所述第一通孔在所述显示面板的正投影。
  4. 如权利要求2所述的显示模组，其中，各所述第一通孔为圆形；所述透明区域为与对应的所述第一通孔同心设置的圆形。
  5. 如权利要求4所述的显示模组，其中，所述透明区域的直径d 1满足如下公式：d 1＝d 0+2htanθ；其中，d 0代表所述第一通孔的直径，θ代表最大成像视角；
    在所述第二相位延迟片包括第一通孔时，h代表所述第二相位延迟片面向所述显示面板的下表面与所述显示面板背离所述第二相位延迟片的下表面之间的距离；
    在所述线偏振片包括第一通孔或所述第二相位延迟片和所述线偏振片包括第一通孔时，h代表所述线偏振片面向所述显示面板的下表面与所述显示面板面背离述第二相位延迟片的下表面之间的距离。
  6. 如权利要求2所述的显示模组，其中，所述第一通孔的直径的取值范围为6μm～20μm。
  7. 如权利要求2所述的显示模组，其中，所述第一相位延迟片包括与各所述第一通孔一一对应的第二通孔；
    所述第二通孔在所述显示面板的正投影与对应的第一通孔在所述显示面板的正投影具有交叠区域。
  8. 如权利要求7所述的显示模组，其中，所述第二通孔在所述显示面板的正投影覆盖对应的所述第一通孔在所述显示面板的正投影。
  9. 如权利要求7所述的显示模组，其中，所述第二通孔为与对应的所述第一通孔同心设置的圆形。
  10. 如权利要求9所述的显示模组，其中，第二通孔的直径d 2满足如下公式：d 2＝d 0+2h’tanθ；其中，d 0代表第一通孔的直径，θ代表最大成像视角；
    在所述第二相位延迟片包括第一通孔时，h’代表所述第二相位延迟片面向所述显示面板的下表面与所述第一相位延迟片面向所述显示面板的下表面之间的距离；
    在所述线偏振片包括第一通孔或所述第二相位延迟片和所述线偏振片包括第一通孔时，h’代表所述第一相位延迟片面向所述显示面板的下表面与所述第一相位延迟片背离所述显示面板的上表面之间的距离。
  11. 如权利要求2所述的显示模组，其中，所述第一相位延迟片和所述第二相位延迟片均为1/4λ波片。
  12. 如权利要求11所述的显示模组，其中，所述线偏振片的透过轴方向与所述第二相位延迟片的光轴夹角为正负45°；
    所述线偏振片的透过轴方向与所述第一相位延迟片的光轴夹角为正负45°。
  13. 如权利要求2所述的显示模组，其中，所述显示面板还包括：多个像素单元和设置于相邻两个所述像素单元间隙中的走线；
    各所述像素单元和各所述走线在所述显示面板的正投影与各所述透明区 域在显示面板的正投影均不交叠。
  14. 如权利要求2所述的显示模组，其中，所述光感探测器包括电荷耦合感光图像传感器或互补金属氧化物半导体感光图像传感器。
  15. 如权利要求2-14任一项所述的显示模组，其中，所述光感探测器设置于所述显示面板的背光面。
  16. 如权利要求15所述的显示模组，其中，所述光感探测器为一个，所述光感探测器对应于所有的所述第一通孔，所述光感探测器在所述显示面板的正投影覆盖所有的所述第一通孔在所述显示面板上的正投影；或，
    所述光感探测器为多个，各所述光感探测器与各所述第一通孔一一对应，所述光感探测器在所述显示面板的正投影覆盖对应的所述第一通孔在所述显示面板上的正投影。
  17. 一种显示装置，其中，包括权利要求1-16任一项所述的显示模组。
PCT/CN2019/089679 2018-07-27 2019-05-31 显示模组及显示装置 WO2020019870A1 (zh)

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