WO2018120655A1 - Panneau d'affichage auto-émetteur, module d'affichage et procédé d'utilisation de module d'affichage - Google Patents

Panneau d'affichage auto-émetteur, module d'affichage et procédé d'utilisation de module d'affichage Download PDF

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Publication number
WO2018120655A1
WO2018120655A1 PCT/CN2017/087645 CN2017087645W WO2018120655A1 WO 2018120655 A1 WO2018120655 A1 WO 2018120655A1 CN 2017087645 W CN2017087645 W CN 2017087645W WO 2018120655 A1 WO2018120655 A1 WO 2018120655A1
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WIPO (PCT)
Prior art keywords
self
optical fingerprint
fingerprint sensing
area
finger
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PCT/CN2017/087645
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English (en)
Chinese (zh)
Inventor
凌严
朱虹
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上海箩箕技术有限公司
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Publication of WO2018120655A1 publication Critical patent/WO2018120655A1/fr

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    • 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
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
    • 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
    • G06V40/1306—Sensors therefor non-optical, e.g. ultrasonic or capacitive 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
    • 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

Definitions

  • the present invention relates to the field of optoelectronic displays, and in particular, to a self-illuminating display panel, a display module, and a display module.
  • Display modules are commonly used to display output information for electronic products.
  • a finger touch sensing layer is usually integrated.
  • the display module with the self-luminous display panel is an important development direction of the current display module because it does not require a backlight, and is lighter and lighter.
  • the functions of the existing self-luminous display panel and the display module are still relatively simple.
  • the existing self-luminous display panel and the display module are integrated with other functional structures, the structure needs to be optimized.
  • the problem to be solved by the present invention is to provide a self-luminous display panel, a display module, and a display module, to increase the functions of the self-luminous display panel and the display module, and to enable different functions of the self-luminous display panel Better coordination and coordination, so that the different functions of the display module can be better coordinated.
  • the present invention provides a self-luminous display panel comprising a first substrate, a second substrate, and a self-luminous circuit layer, the self-luminous circuit layer being located between the first substrate and the second substrate;
  • the self-illuminating circuit layer includes a display area, and the display area package a plurality of self-luminous display pixels; wherein: the display area includes one or more optical fingerprint sensing areas; and in the optical fingerprint sensing area, each of the m ⁇ n of the self-luminous display pixels, k
  • Each of the self-luminous display pixels has at least one optical fingerprint sensing element, m and n are any integer of 1 or more, k is any integer from 1 to m ⁇ n; in the optical fingerprint sensing area
  • the self-luminous display pixel includes a light transmissive area and a non-transparent area, and the optical fingerprint sensing element is located in the non-transparent area.
  • a distance between adjacent optical fingerprint sensing elements is 30 ⁇ m to 100 ⁇ m.
  • the self-luminous display pixel has a TFT device, and a gate of the TFT device is located under the semiconductor layer, and a light shielding layer is disposed above the semiconductor layer.
  • the light shielding layer is connected to a fixed potential.
  • the present invention further provides a display module comprising: the self-luminous display panel as described above; a dot backlight, the number of the dot backlights being greater than or equal to the optical fingerprint sensing The number of the regions, one of the optical fingerprint sensing regions uses at least one of the dot backlights for fingerprint image acquisition; the dot backlight is located obliquely below the optical fingerprint sensing region.
  • the display module further includes a protective layer, the protective layer being located above the first substrate of the self-luminous display panel.
  • the present invention further provides a method for using a display module, the display module being as described above; the using method includes: when detecting that at least one of the optical fingerprint sensing regions is pressed by a finger Controlling the optical fingerprint sensing area pressed by the finger to perform finger fingerprint image collecting work, and controlling the optical fingerprint sensing area pressed by the finger The self-luminous display pixel stops emitting light.
  • controlling an area of the display module that is not pressed by a finger displays information associated with fingerprint recognition.
  • the optical fingerprint sensing area pressed by one finger is one, and the point backlight corresponding to the optical fingerprint sensing area is only one, and the point backlight is controlled.
  • the fingerprint image of the finger is collected.
  • the optical fingerprint sensing area pressed by one finger is one, and the point backlights corresponding to the optical fingerprint sensing area are two or more; and any one of the point backlights is controlled. Collecting a fingerprint image of the finger, or controlling the two or more of the dot-like backlights to be turned on in turn to take a fingerprint image of the finger from different directions in turn.
  • the optical fingerprint sensing area pressed by one finger is two or more, and the point backlight corresponding to each of the optical fingerprint sensing areas is one, and each of the optical fingerprints is controlled.
  • the point-shaped backlight of the measuring area collects a partial fingerprint image of the finger, and each part of the fingerprint image collected from the two or more optical fingerprint sensing areas is merged into a fingerprint image of the finger.
  • the optical fingerprint sensing area pressed by one finger is two or more, and the point backlights corresponding to each of the optical fingerprint sensing areas are two or more, and each of the opticals is controlled.
  • the point-shaped backlight of the fingerprint sensing area is turned on in turn to collect part of the fingerprint image of the finger from different directions in turn, and the fingerprint images collected from the two or more optical fingerprint sensing areas are merged into The fingerprint image of this finger.
  • the self-luminous display panel has a touch layer, or a touch layer is disposed above the self-light-emitting display panel, and the touch layer is used to detect a pressed position of a finger on a surface of the display area.
  • a corresponding optical fingerprint sensing element is disposed in the self-luminous display pixel, and the self-luminous display pixel of the optical fingerprint sensing area is further disposed.
  • the light transmissive area is provided (the light transmissive area is usually located around the optical fingerprint sensing element), and therefore, a method such as providing a point backlight under the self-luminous display panel can be utilized to achieve the use of the optical fingerprint sensing element pair
  • the purpose of the fingerprint image acquisition is to realize the fingerprint recognition function, and at the same time, the self-luminous display panel can realize the fingerprint recognition function in cooperation with the corresponding backlight on the premise that the self-luminous display panel can display.
  • the display module provides a point backlight disposed obliquely below the optical fingerprint sensing area of the self-luminous display panel, so that the light emitted by the point backlight can be obliquely upward.
  • the angle enters the second substrate, and then passes through the self-illuminating circuit layer through the light-transmitting region of the self-illuminating circuit layer, and continues to reach the first substrate, and the reflection and refraction of the finger fingerprint occurs on the surface of the first substrate.
  • the corresponding reflected light can be returned to the first substrate, and then enters the corresponding optical fingerprint sensing component from the first substrate, and is received by the optical fingerprint sensing component to generate a corresponding electrical signal, thereby enabling fingerprint image acquisition.
  • FIG. 1 is a schematic top plan view of a display area of a self-luminous display panel according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of a display module according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of a first TFT in the display module shown in FIG. 2;
  • FIG. 4 is a schematic structural view of a second TFT in the display module shown in FIG. 2;
  • FIG. 5 is a schematic diagram of a display module according to another embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a method for using a display module according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of another method for using a display module according to an embodiment of the present invention.
  • the functions of the existing display modules are still relatively simple, and the structure needs to be optimized when integrated with the structure of other functions.
  • the present invention provides a new self-luminous display panel, which is combined with a corresponding point-like backlight to form a corresponding display module, so that the display module has a good fingerprint collection function, and Optimizing the integrated structure makes the fingerprint recognition function of the display module stronger.
  • the display function of the display module and the fingerprint recognition function are further used together to achieve a better user experience.
  • the context in this specification is defined by placing the display panel under the eyes of the user. That is, in the display panel, if one structure is located above the other structure, this structure is closer to the user's eyes than the other structure when the display panel is placed under the user's eyes. At the same time, the area of each structure mentioned in this specification is usually the corresponding structural area seen from the user's eyes looking down. Explain together here.
  • the self-luminous display panel is an OLED display panel.
  • OLED display panel For more information about the OLED display panel, refer to the corresponding content of other embodiments in this specification.
  • FIG. 1 is a top view of a display area of a self-luminous display panel. Therefore, the first substrate, the second substrate, the self-luminous circuit layer, and the sealing structure included in the self-luminous display panel are not shown. Refer to the corresponding content of other subsequent embodiments of this specification.
  • the display area 1 includes an optical fingerprint sensing area 10, and the optical fingerprint sensing area 10 is surrounded by a large dotted frame for highlighting.
  • the area of the optical fingerprint sensing area 10 is smaller than the area of the display area 1, that is, the optical fingerprint sensing area 10 is only a part of the display area 1.
  • the area of the optical fingerprint sensing area and the area of the display area may be equal, that is, the area where the entire display area 1 is located is also the optical fingerprint sensing. The area where the district is located.
  • the display area may also include a plurality of (two or more) optical fingerprint sensing areas. At this time, each optical fingerprint sensing area is a part of the display area, and the total of all the optical fingerprint sensing areas may be the display area or may be smaller than the display area.
  • the display area 1 includes a plurality of self-luminous display pixels 10a, and the self-luminous display pixels 10a are generally arranged in a matrix (array). Therefore, in the optical fingerprint sensing area 10, a plurality of self-luminous display pixels 10a arranged in a row and column are also included. It should be noted that only the self-luminous display pixel 10a in the optical fingerprint sensing area 10 is shown in FIG. 1, and the self-luminous display pixel not located in the optical fingerprint sensing area 10 is not shown.
  • one of the 2 x 2 self-luminous display pixels 10a has one optical fingerprint sensing element 10a1 (the optical fingerprint sensing element 10a1 is
  • the photoelectric conversion device may be, for example, a photodiode or the like).
  • a set of 2 x 2 self-luminous display pixels 10a are framed by a dashed box A (small dashed box) to enhance display. The same is true for every other 2 ⁇ 2 self-luminous display pixels 10a.
  • each of the self-luminous display pixels 10a may have a single pixel structure, that is, the self-luminous display pixels 10a do not include sub-pixels.
  • the optical fingerprint sensing element 10a1 can be formed at an appropriate position of the self-luminous display pixel 10a.
  • the self-luminous display pixel 10a may also include a plurality of sub-pixels (for example, three sub-pixels or four sub-pixels).
  • the optical fingerprint sensing component 10a1 may be formed in an area other than each sub-pixel, or may be fabricated in Within a sub-pixel.
  • the optical fingerprint sensing element 10a1 is evenly distributed in the self-luminous display pixel 10a of the optical fingerprint sensing area 10. If the optical fingerprint sensing element 10a1 in the optical fingerprint sensing area 10 is separately viewed, The individual optical fingerprint sensing elements 10a1 are also arranged in rows and columns. In particular, in the present embodiment, each of the optical fingerprint sensing elements 10a1 is specifically formed in the first one of the 2 ⁇ 2 self-luminous display pixels 10a, that is, in the self-luminous display pixel 10a at the upper left corner position.
  • each of the k self-luminous display pixels has at least one optical fingerprint sensing element, and m and n are any one or more.
  • An integer, k is any integer from 1 to m ⁇ n.
  • k is equal to 1 (ie, one of the self-luminous display pixels has at least one optical fingerprint sensing element per m ⁇ n of the self-luminous display pixels)
  • m and n are 1 or more. Any integer.
  • the embodiment shown in FIG. 1 is a case where m and n are both equal to 2 and k is equal to 1.
  • each of the k self-luminous display pixels has at least one optical fingerprint sensing element per m ⁇ n of the self-luminous display pixels in the optical fingerprint sensing region. In this case, it may be further set that at least one of m and n is greater than 1, and k is less than m ⁇ n. For another example, it may be that each of the self-luminous display pixels has one optical fingerprint sensing element. As another example, each of the self-illuminating display pixels has a plurality (eg, two) of optical fingerprint sensing elements.
  • each of the self-luminous display pixels of the odd-numbered rows has four optical fingerprint sensing elements, and each of the even-numbered rows has two optical fingerprint sensing elements.
  • each of the self-luminous display pixels includes three sub-pixels, and one of the self-luminous display pixels has one optical fingerprint sensing element per 1 ⁇ 2 self-luminous display pixels.
  • each of the self-illuminating display pixels includes three sub-pixels, and each of the two adjacent self-illuminating display pixels in the odd-numbered rows, one of the self-illuminating display pixels has two optical fingerprint sensing elements, and the other The illuminating display pixel has one optical fingerprint sensing element.
  • the fingerprint image resolution is insufficient and cannot be used for fingerprint recognition. If the distance between them is smaller, although the image resolution will be better, the effect of actual fingerprint recognition will not be significantly improved. Moreover, since the pixel size is reduced, when the fingerprint image of the same area is acquired, the data amount of the fingerprint image is increased, so that the image acquisition time is increased, the collection power consumption of the optical fingerprint sensing area is increased, and subsequent image processing is also performed. The time is getting longer.
  • each of the self-luminous display pixels 10a of the optical fingerprint sensing area 10 includes at least one light transmissive area (not labeled) and at least one non-transmissive area (not labeled).
  • the optical fingerprint sensing component 10a1 is located in the non-transmissive region, and the optical fingerprint sensing component 10a1 has the transparent region around the periphery.
  • the non-transparent area and the transparent area please refer to the corresponding contents of the subsequent embodiments.
  • a corresponding optical fingerprint sensing component 10a1 is formed in the self-luminous display pixel 10a of the optical fingerprint sensing area 10, and the optical fingerprint sensing area 10 is disposed.
  • the self-luminous display pixel 10a further has the light-transmissive area located around the periphery of the optical fingerprint sensing element 10a1. Therefore, a method such as providing a dot-shaped backlight under the self-luminous display panel can be utilized to achieve the use of the optical fingerprint sensing.
  • the component 10a1 collects the fingerprint image to realize the fingerprint recognition function, and at the same time enables the self-luminous display panel to realize the fingerprint recognition function in cooperation with the corresponding backlight on the premise that the self-luminous display panel can display.
  • the embodiment of the invention further provides a display module, which is referred to FIG. 2 .
  • the display module includes a self-illuminating display panel (not labeled).
  • the display area also includes only one optical fingerprint sensing area (not labeled), in which case the area of the display area is equal to the area of the optical fingerprint sensing area.
  • the optical fingerprint sensing area has a plurality of self-luminous display pixels 1131 arranged in a row (the portion surrounded by the dotted frame in FIG. 2 shows the area where the self-luminous display pixel 1131 is located, but it should be noted that the dotted frame includes a part.
  • the self-luminous display pixel 1131 does not include the first substrate 111 and the second substrate 112), and each of the self-luminous display pixels 1131 has an optical fingerprint. Sensing element 11311.
  • the self-luminous display panel (for example, the display area of the self-luminous display panel is larger than the area of the optical fingerprint sensing area) may refer to other situations mentioned in the foregoing description.
  • the self-luminous display panel includes a first substrate 111, a second substrate 112, and a self-luminous circuit layer 113.
  • the self-luminous circuit layer 113 is located between the first substrate 111 and the second substrate 112.
  • the self-luminous display panel further includes a sealing structure 114.
  • the sealing structure 114 is also located between the first substrate 111 and the second substrate 112. The sealing structure 114, together with the first substrate 111 and the second substrate 112, seals the self-luminous circuit layer 113 between the first substrate 111 and the second substrate 112 to isolate air and moisture (water vapor) and the like in the environment.
  • FIG. 2 shows four self-luminous display pixels 1131 as representative.
  • the self-luminous circuit layer 113 includes a plurality of self-luminous display pixels 1131.
  • the area in which the self-luminous display pixels 1131 are located and the adjacent relationship of the respective self-luminous display pixels 1131 are shown by dashed lines in FIG.
  • Each of the self-luminous display pixels 1131 includes at least one non-transmissive region (not labeled) and at least one light transmissive region 11312.
  • a light transmissive region 11312 is illustrated in FIG. 2 (ie, one of the light transmissive regions 11312 is located in FIG. 2 The range enclosed by the smallest dashed box is shown).
  • the material of the first substrate 111 and the second substrate 112 may be a transparent material, and the specific material may be inorganic glass or organic glass, or may be other organic transparent resin than organic glass.
  • the light transmissive area of a self-luminous display pixel is further It can be connected with the light-transmissive area of another self-illuminating display pixel to form a wider transparent area.
  • the two self-luminous display pixels are usually adjacent, and at this time, two self-illuminating The area between adjacent pixels of the display pixel is also a light transmitting area.
  • the luminescence principle of the OLED display panel is: under a certain voltage driving, electrons and holes migrate from the cathode layer and the anode layer to the luminescent layer, respectively, and meet in the luminescent layer to form excitons and excite the luminescent molecules, and the luminescent molecules undergo radiation. Relaxation produces visible light (or other light).
  • the structure of the above-mentioned light-emitting layer or the like is located in the corresponding non-light-transmitting region.
  • the self-luminous display pixel 1131 of the embodiment has a corresponding light transmissive area 11312 around the non-transparent area.
  • non-transparent regions of the present embodiment and the foregoing embodiments not the entire region is non-transparent from top to bottom. Rather, the bottoms of these regions have a non-transmissive structure such that photosensitive structures (eg, semiconductor layers or structures of optical fingerprint sensing elements 11311) located above the bottom non-transmissive structures can be protected by these non-transmissive structures, Affected by light from below.
  • photosensitive structures eg, semiconductor layers or structures of optical fingerprint sensing elements 11311
  • the structures above the photosensitive structures are still light transmissive so that the photosensitive structures can emit light from above or can receive light from above.
  • light emitted from the light-emitting layer can reach the user's eyes upward, and for example, the corresponding fingerprint-reflected light can propagate downward and be received by the optical fingerprint sensing area.
  • other non-transmissive regions are caused by some structures that are not transparent to light.
  • some metal traces in the self-luminous circuit layer 113 are generally non-transmissive structures, and for example, TFTs in the self-luminous circuit layer 113.
  • the gates included in the device are also typically non-transmissive.
  • the (organic) light-emitting layer may be located in the light-transmitting region or in the non-light-transmitting region.
  • the light-emitting layer itself usually has a certain light transmissivity, and the electrode layer located above the light-emitting layer is usually also provided with a certain light transmittance, thereby ensuring The OLED display panel is displayed.
  • the electrode layer under the light-emitting layer is usually made opaque or even reflective, so that more light can be emitted from above, thereby improving brightness (this) When the luminescent layer is located in the non-transmissive region).
  • the optical fingerprint sensing component 11311 is generally located in the non-transmissive region, that is, the optical fingerprint sensing component 11311 has a non-transmissive structure.
  • the structure above the optical fingerprint sensing element 11311 generally has a better light transmission capability, so that the subsequent optical fingerprint sensing element 11311 can receive more light reflected from the fingerprint of the finger.
  • the display module further includes a dot backlight 120.
  • the number of the dot backlights 120 is greater than or equal to the number of the optical fingerprint sensing regions, and one of the optical fingerprint sensing regions uses at least one of the dot backlights 120 for fingerprint image acquisition.
  • the dot backlight 120 is located obliquely below the optical fingerprint sensing area, as shown in FIG.
  • only one dot backlight 120 is employed. In other embodiments, more than two point backlights may be provided.
  • the dot backlight 120 may be a dot LED lamp, and the light emitted by the dot LED lamp may be near ultraviolet light, purple light, blue light, green light, yellow light, red light, near infrared light. Or white light.
  • the self-luminous circuit layer 113 is formed on the second substrate 112, and the self-luminous circuit layer 113 and the first substrate 111 have a gap layer therebetween. And the void layer is filled with an inert gas such as nitrogen or argon to protect the self-luminous circuit layer 113 from being crushed by the first substrate 111.
  • an inert gas such as nitrogen or argon
  • the height of the light-transmitting region 11312 is equal to the height of the self-light-emitting circuit layer 113, as shown in FIG. 2, that is, the light-transmitting region is a light-transmitting structure from the bottom to the top, thereby ensuring light can be transmitted from the light-transmitting region.
  • the self-illuminating circuit layer 113 is passed through. (It should be noted that the height of each position of the self-illuminating circuit layer 113 may be slightly different, but the height of the self-illuminating circuit layer 113 at least a portion of the position is equal to the height of the light-transmitting region 11312).
  • the self-luminous display pixel 1131 on the basis of ensuring the corresponding structure and function of the self-luminous display pixel 1131, other structures of the self-luminous display pixel 1131 can be fabricated by using a light-transmitting structure as much as possible to increase the corresponding light-transmissive area. Further, the structure between the adjacent self-luminous display pixels 1131 can also be fabricated by using a light-transmitting structure as much as possible. At the same time, outside the display area where the self-luminous display pixels 1131 are located, for example, in the manufacturing position of the structure such as the driving circuit and the binding pin, the corresponding light-transmitting area can also be disposed, so that more light can pass through.
  • a self-luminous display panel here through which is generally referred to as passing through the height of the self-illuminating display pixel 1131, the height is also commonly referred to as thickness), such as an OLED display panel.
  • the lower surface of the second substrate 112 of the self-luminous display panel may further include a light anti-reflection layer, and the light anti-reflection layer is located below the optical fingerprint sensing area.
  • the light anti-reflection layer can increase the proportion of light from the point backlight 120 into the optical fingerprint sensing area.
  • FIG. 3 is a schematic structural diagram of a first TFT in the display module shown in FIG.
  • the TFT structure is entirely located above the second substrate 112.
  • the dielectric layer T11 is a multi-layer structure, which is fabricated through multiple processes.
  • the semiconductor layer T12 is formed, and then a portion of the dielectric layer T11 is formed to cover the semiconductor layer T12, and then the gate electrode T15 is formed.
  • a portion of the dielectric layer T11 is formed to cover the gate electrode T15.
  • the semiconductor layer T12 is electrically connected to the conductive structure T13 and the conductive structure T14, respectively, and the conductive structure T13 and the conductive structure T14 are used for connecting the source (not labeled) and the drain (not labeled) at both ends of the semiconductor layer T12, and the middle of the semiconductor layer T12
  • the area acts as a channel area.
  • a gate T15 Located above the semiconductor layer T12 is a gate T15 having a portion of the dielectric layer T11 between the gate T15 and the semiconductor layer T12, and this portion of the dielectric layer T11 serves as a gate dielectric layer. Since the gate T15 is located above the semiconductor layer T12, the TFT structure is a top gate structure.
  • the TFT structure further has a light shielding layer T10 under the semiconductor layer T12.
  • the light shielding layer T10 serves to prevent the semiconductor layer T12 from being affected by the light transmitted from below.
  • the TFT structure can be generally fabricated by a low temperature polysilicon process, or by an amorphous silicon process or an oxide semiconductor process.
  • the light shielding layer T10 is electrically connected to a fixed potential (if the light shielding layer T10 is in a floating state, the potential of the light shielding layer T10 is unknown and may not be fixed.
  • the light shielding layer T10 is also a back gate of the TFT, if shading If the potential of the layer T10 is unknown, the electrical properties of the TFT may be affected to ensure stable electrical performance of the TFT.
  • the area of the light shielding layer T10 is set larger than the area of the semiconductor layer T12, thereby better blocking the semiconductor layer T12.
  • the conductive structure T23 and the conductive structure T24 are used to connect the source (not labeled) and the drain (not labeled) of the semiconductor layer T22, and the middle of the semiconductor layer T22
  • the area is the channel area.
  • Located below the semiconductor layer T22 is a gate T25, and the gate T25 may be directly formed on the surface of the second substrate 112.
  • a portion of the dielectric layer T21 is provided between the gate T25 and the semiconductor layer T22, and this portion of the dielectric layer T21 functions as a gate dielectric layer. Since the gate T25 is located under the semiconductor layer T22, the TFT structure is a bottom gate structure. At this time, the TFT structure further has a light shielding layer T20 located above the semiconductor layer T22.
  • the light shielding layer T20 serves to prevent the semiconductor layer T22 from being affected by the light transmitted from above.
  • the TFT structure can be generally fabricated by an amorphous silicon process or an oxide semiconductor process, or can be fabricated by a low temperature polysilicon
  • the light shielding layer T20 is electrically connected to a fixed potential (if the light shielding layer T20 is in a floating state, the potential of the light shielding layer T20 is unknown and may not be fixed.
  • the light shielding layer T20 is also a back gate of the TFT, if shading If the potential of the layer T20 is unknown, the electrical properties of the TFT may be affected) to ensure stable electrical performance of the TFT.
  • the area of the light shielding layer T20 is set larger than the area of the semiconductor layer T22, thereby better shielding the semiconductor layer T22.
  • the dot backlight 120 is located obliquely below the optical fingerprint sensing area of the self-luminous display panel (below the side, that is, when viewed from the top down, the dot backlight 120 is located.
  • the light emitted by the point backlight 120 can enter the second substrate 112 at an obliquely upward angle and then pass through the light transmissive area of the self-illuminating circuit layer 113.
  • the self-luminous circuit layer 113 continues to reach the first substrate 111 (in the process from the self-luminous circuit layer 113 to the first substrate 111, usually passes through the above-mentioned void layer), and occurs on the surface of the first substrate 111 with the finger
  • the optical phenomenon such as reflection and refraction of the fingerprint, the corresponding reflected light generated can be returned to the first substrate 111, and then enters the corresponding optical fingerprint sensing component 11311 from the first substrate 111, and is received (absorbed) by the optical fingerprint sensing component 11311, resulting in Corresponding electrical signals enable the acquisition of fingerprint images (the corresponding light is shown by the black arrow in Figure 2, where the partial refraction of the light is omitted).
  • the optical fingerprint sensor is equivalent to being integrated in a self-luminous display panel (for example, an OLED display panel).
  • the upper and lower substrates (the first substrate 111 and the second substrate 112) of the self-luminous display panel are each a light-transmitting substrate, and the optical fingerprint sensing element 11311 is integrated in the self-illuminating circuit layer;
  • a dot-shaped backlight 120 is disposed under the self-luminous display panel, and when the fingerprint image is captured, only the point-shaped backlight 120 located under the self-luminous display panel is used as a light source for fingerprint image acquisition, instead of using the self-luminous display panel itself.
  • the self-luminous display pixel 1131 serves as a light source for fingerprint image acquisition.
  • the self-luminous display pixel 1131 is directly used as the light source, the light emitted from the light-emitting display pixel 1131 is usually stray light and interferes with each other. In addition, a plurality of self-luminous display pixels 1131 may accentuate the interference of such light. Therefore, when the thickness of the first substrate of the self-luminous display panel itself is large, or the thickness of the applied protective layer (see the subsequent embodiment of the protective layer) is large, if the self-luminous display pixel 1131 is directly used as the light source, the light rays are mutually The interference effect will make the collected fingerprint image blurred and unable to obtain a clear fingerprint image. Generally, the thickness of the first substrate, or the total thickness of the "first substrate and the applied protective layer", needs to be only 0.4 mm or more, and this structure cannot obtain a clear fingerprint image.
  • the display panel of the embodiment utilizes an optical fingerprint located on the self-luminous display panel.
  • the point backlight 120 obliquely below the sensing area serves as a light source, and the light emitted by the point backlight 120 (specifically, the LED lamp) can have better homogeneity, and thus, a clearer fingerprint image quality can be obtained. Even if the thickness of the corresponding first substrate, or the total thickness of the "first substrate and the applied protective layer" is 10 mm or even greater than 10 mm, there is no problem that the fingerprint image is blurred, and the fingerprint recognition performance of the display module is improved.
  • the optical fingerprint recognition function is integrated in the self-luminous display panel, and the subsequent corresponding use method can realize the collection in the display area (ie, the display area) of the display module.
  • the fingerprint image can reduce the appearance size of the electronic product to which the display panel is applied, increase the screen ratio of the electronic product, and improve the appearance of the electronic product (for example, the screen ratio of the mobile phone product can be improved, and the appearance of the mobile phone product can be improved. degree).
  • the embodiment of the present invention further provides another display module.
  • the cross-sectional view of the display module is as shown in FIG. 5.
  • the structure of the display module is the same as that of the previous embodiment, and reference may be made to the corresponding content of the corresponding embodiment.
  • the display module includes a self-luminous display panel
  • the self-luminous display panel includes a first substrate 221 , a second substrate 222 , and a self-luminous circuit layer 223 .
  • the self-luminous circuit layer 223 is located between the first substrate 221 and the second substrate 222.
  • the self-luminous display panel also includes a sealing structure 224.
  • the sealing structure 224 is also located between the first substrate 221 and the second substrate 222.
  • the sealing structure 224 together with the first substrate 221 and the second substrate 222, seals the self-luminous circuit layer 223 between the first substrate 221 and the second substrate 222.
  • the self-luminous display panel has two optical fingerprint sensing regions (not labeled). As shown in FIG. 5, two optical fingerprint sensing regions are distinguished by a dotted line.
  • the dot backlights corresponding to each of the optical fingerprint sensing regions are located obliquely below the respective optical fingerprint sensing regions, and the two dot backlights are a dot backlight 231 and a dot backlight 232, respectively.
  • FIG. 5 shows two self-luminous display pixels 2231 in the two optical fingerprint sensing regions.
  • the self-luminous circuit layer 223 includes a plurality of self-luminous display pixels 2231.
  • the self-luminous display pixel 2231 is shown by a dashed box in FIG. The area, and the respective self-luminous display pixels 2231 are adjacent to each other.
  • Each of the self-luminous display pixels 2231 includes at least one non-transmissive region (not labeled) and at least one light transmissive region 22312, and a light transmissive region 22312 is illustrated in FIG. 5 (ie, one of the light transmissive regions 22312 is in a range as shown in FIG. 5 The range enclosed by the smallest dashed box is shown).
  • the non-transparent area of the self-luminous display pixel 2231 has an optical fingerprint sensing element 22311. For more details, refer to the corresponding content of the foregoing embodiment.
  • the display module further includes a protective layer 210 located above the self-luminous display panel. Since the protective layer 210 is provided, the structure directly pressed by the finger is converted from the first substrate to the protective layer 210, and accordingly, the corresponding light propagation process increases the process of passing through the protective layer 210 (the dot backlight 231 and the dot backlight 232). The corresponding light emitted, and the resulting reflected light of the fingerprint are shown by the black arrows in Fig. 5, in which the partial refraction of the light is omitted.
  • the entire self-luminous display panel is divided into a plurality of regions, and the difference includes a plurality of optical fingerprint sensing regions, and different dot backlights in different regions.
  • the touch of the display module can be
  • the control function that is, in the embodiment, the display module is a display module integrated with a touch function
  • the display area of the display module is usually much larger than one finger, and the area illuminated by each point backlight is limited (for example, one) A point-shaped backlight for small LED lights with limited illumination area). Therefore, when divided into a plurality of regions, a point-shaped backlight can be used correspondingly to an optical fingerprint sensing area having a small area (for example, when an optical fingerprint sensing area having a small area is pressed by a finger, the corresponding corresponding is turned on. LED light), which effectively enhances the light intensity of the light source when the fingerprint image is acquired.
  • the imaging principle of the present invention fully utilizes the light omnidirectionality of the point backlight to avoid interference between different light sources.
  • the LED light is not ideal. Point-like backlight. Because LED lights have a certain luminous area (especially white, etc. The light powder converts the illuminating LED light source), and the larger the illuminating surface, the greater the proportion of the interference of the light emitted by the different illuminating points. Therefore, the possibility of interference can be reduced by pulling away the distance of the LED lamp to the optical fingerprint sensing area.
  • this embodiment can select a smaller LED lamp as a point backlight.
  • the smaller the LED light the more limited the area of illumination.
  • the light intensity of the point backlight is attenuated by the quadratic distance, so the distance is far to a certain extent, the light intensity is not enough, and it cannot be a good fingerprint image.
  • a plurality of LED lights are arranged, distributed in different areas, and the areas illuminated between each of the LED lights may partially overlap each other. Moreover, at the same time, only one LED light can be turned on to avoid light interference of different LED lights.
  • the structure of the plurality of dot-shaped backlights in multiple regions can enable the corresponding fingerprint acquisition circuit to be activated in the sub-area, and at the same time, the fingerprint images of the plurality of regions can be collected at the same time, and the collection can be reduced.
  • the role of time because multiple small areas are performed simultaneously, equivalent to the acquisition time of a small area, while the acquisition time of a small area is less than the acquisition time of a large area), and can also reduce power consumption.
  • the embodiment of the present invention further provides a method for using a display module, and the display module may be any of the foregoing mentioned in the foregoing description. Therefore, the display module includes a self-luminous display panel, and the self-luminous display panel may include a first substrate, a second substrate, and a self-luminous circuit layer.
  • the self-luminous circuit layer is located between the first substrate and the second substrate.
  • the self-illuminating circuit layer includes a display area including a plurality of self-illuminating display pixels.
  • the display area includes more than one optical fingerprint sensing area. In the optical fingerprint sensing area, each of the k self-luminous display pixels has at least one optical fingerprint sensing element, and m and n are 1 or more per m ⁇ n of the self-luminous display pixels.
  • the self-luminous display pixel includes a light transmissive area and a non-transparent area, and the optical fingerprint sensing element is located in the non-transparent area.
  • the display module further includes a dot backlight, The number of the dot backlights is greater than or equal to the number of the optical fingerprint sensing regions, and one of the optical fingerprint sensing regions uses at least one of the dot backlights for fingerprint image acquisition; the dot backlight The source is located obliquely below the optical fingerprint sensing area.
  • the display module may further include a protective layer located above the first substrate of the self-luminous display panel.
  • the second substrate lower surface of the self-luminous display panel may further include a light anti-reflection layer, the light-light anti-reflection layer is located below the optical fingerprint sensing area, and the light anti-reflection layer can increase the point The proportion of light from the backlight entering the optical fingerprint sensing area.
  • a distance between adjacent optical fingerprint sensing elements may be 30 ⁇ m to 100 ⁇ m.
  • the self-luminous display pixel has a TFT device, a gate of the TFT device is located above the semiconductor layer, and a light shielding layer is disposed under the semiconductor layer; or, the self-luminous display pixel has a TFT device, and the TFT device
  • the gate is located below the semiconductor layer with a light shielding layer over the semiconductor layer.
  • the light shielding layer is electrically connected to a fixed potential.
  • the area of the light shielding layer is larger than the area of the semiconductor layer.
  • the method includes: when detecting that at least one optical fingerprint sensing area is pressed by a finger, controlling an optical fingerprint sensing area pressed by a finger to perform a finger fingerprint image collecting operation, and controlling an optical fingerprint sensing area pressed by a finger
  • the self-luminous display pixel stops emitting light.
  • the optical fingerprint sensing area pressed by the finger is defined as the first display area. Therefore, the foregoing process is: controlling the first display area to perform finger fingerprint image collecting work, and controlling the first display area.
  • the self-illuminating display pixel stops emitting light.
  • the usage method provided by the embodiment may further include: when the first display area performs a fingerprint image collection operation, controlling the second display area to display information associated with the fingerprint image collection work. For example, in the second display area, display "Please enter a fingerprint in the non-display area" or "Please enter a fingerprint in the following dark frame area". During the fingerprint entry process, the message "Enter correctly” or "Please re-enter” is displayed. When the correct fingerprint is collected, information such as “effective fingerprint” can be displayed, or a message such as “operational success” can be displayed according to the fingerprint operation. This method of use enables the display function and the fingerprint recognition function to work together to achieve a better user experience.
  • the usage method may further develop an application scenario of the fingerprint recognition function, for example, before the optical fingerprint sensing component of the optical fingerprint sensing area is not working, causing the first display area to display a corresponding display icon, indicating that the user will Put your finger inside the icon.
  • the existing display panel itself or the external touch function can be used to sense that the user has placed the finger in the first display area, thereby controlling the corresponding optical fingerprint sensing area.
  • the optical fingerprint sensing component enters a working state.
  • the fingerprint image of the pressed fingerprint is collected by the optical fingerprint sensing component of the first display area, and the fingerprint image collecting function is completed, and can be further applied to the existing stored internal storage.
  • the fingerprint image is identified and further utilized for encryption/unlocking and the like.
  • the display area of the entire display module when the display area of the entire display module is pressed by only one finger, it can be divided into the following four cases.
  • the optical fingerprint sensing area pressed by one finger is one, and the point backlight corresponding to the optical fingerprint sensing area is only one, and the point backlight is controlled to collect the fingerprint image of the finger.
  • the optical fingerprint sensing area pressed by one finger is one
  • the point backlight corresponding to the optical fingerprint sensing area is two or more; controlling any one point-shaped backlight, and the fingerprint image of the finger
  • the acquisition is performed, or two or more point backlights are controlled to be turned on in turn to take a fingerprint image of the finger from different directions in turn.
  • the second case above can be referred to FIG. 6.
  • the display area 300 has an optical fingerprint sensing area 310, and the optical fingerprint sensing area 310 has three corresponding dot-shaped backlights.
  • the dot backlight 321 , the dot backlight 322 and the dot backlight 323 are used to enable the three dot backlights to sequentially capture the fingerprint images of the finger 330 from different directions.
  • the different images collected can be processed to perform distortion correction, improve the quality of the fingerprint image, and improve the accuracy of fingerprint recognition.
  • the light emitted by any one of the dot backlights may be selected as the imaging light of the fingerprint image for the fingerprint image collection.
  • the optical fingerprint sensing area pressed by one finger is two or more, and the point backlight corresponding to each optical fingerprint sensing area is one, and the point backlight of each optical fingerprint sensing area is controlled.
  • the partial fingerprint image of the finger is collected, and the fingerprint images of the respective portions collected from the two or more optical fingerprint sensing regions are merged into the fingerprint image of the finger.
  • the display area 400 has four optical fingerprint sensing areas, which are an optical fingerprint sensing area 411, an optical fingerprint sensing area 412, an optical fingerprint sensing area 413, and an optical fingerprint sensing area 414, respectively.
  • the four optical fingerprint sensing areas have corresponding four point backlights, which are a point backlight 421, a point backlight 422, a point backlight 423, and a point backlight 424, and a point backlight corresponds to An optical fingerprint sensing area.
  • the four point backlights may be simultaneously or separately opened, and the respective partial fingerprint images respectively collected by the corresponding four optical fingerprint sensing areas are merged into the fingerprint image of the finger 430.
  • the optical fingerprint sensing area pressed by one finger is two or more, and the point backlights corresponding to each optical fingerprint sensing area are two or more, and the dot shape of each optical fingerprint sensing area is controlled.
  • the backlight is turned on in turn to collect part of the fingerprint image of the finger from different directions in turn, and the fingerprint images collected from the two or more optical fingerprint sensing areas are merged into the fingerprint image of the finger.
  • the processing condition of each finger may be any one of the above four cases.
  • two or more fingers can simultaneously acquire fingerprint images, and can also separately collect fingerprint images.
  • the self-luminous display panel may have a touch layer (for example, the touch layer is integrated on the lower surface of the first substrate of the self-luminous display panel), or the touch is disposed above the self-luminous display panel. Control layer. Then, the touch layer is used to detect the pressing position of the finger on the surface of the display area. For example, the touch layer is used to specifically determine which optical fingerprint sensing area the finger is pressed.

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Abstract

L'invention concerne un panneau d'affichage auto-émetteur, un module d'affichage et un procédé d'utilisation d'un module d'affichage. Le panneau d'affichage auto-émetteur comprend un premier substrat, un second substrat et une couche de circuit auto-émetteur. La couche de circuit auto-émetteur est située entre le premier substrat et le second substrat. La couche de circuit auto-émetteur comprend une région d'affichage comprenant une pluralité de pixels d'affichage auto-émetteurs. La région d'affichage comprend une ou plusieurs régions de détection d'empreintes digitales optique. Dans la région de détection d'empreintes digitales optique, pour chaque m×n pixels d'affichage auto-émetteurs, chacun des k pixels d'affichage auto-émetteurs comprend au moins un élément de détection d'empreintes digitales optique, où chacun de m et n est n'importe quel nombre entier supérieur à 1, et k est n'importe quel nombre entier compris entre 1 et m×n. Dans la région de détection d'empreintes digitales optique, le pixel d'affichage auto-émetteur comprend une région optiquement transmissive et une région optiquement non transmissive. L'élément de détection d'empreintes digitales optique est situé au niveau de la région optiquement non transmissive. Le panneau d'affichage auto-émetteur peut coopérer avec une source de rétroéclairage correspondante pour réaliser une fonction de reconnaissance d'empreintes digitales.
PCT/CN2017/087645 2016-12-29 2017-06-09 Panneau d'affichage auto-émetteur, module d'affichage et procédé d'utilisation de module d'affichage WO2018120655A1 (fr)

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