WO2018205121A1 - Module d'affichage - Google Patents

Module d'affichage Download PDF

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Publication number
WO2018205121A1
WO2018205121A1 PCT/CN2017/083542 CN2017083542W WO2018205121A1 WO 2018205121 A1 WO2018205121 A1 WO 2018205121A1 CN 2017083542 W CN2017083542 W CN 2017083542W WO 2018205121 A1 WO2018205121 A1 WO 2018205121A1
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WO
WIPO (PCT)
Prior art keywords
self
protective layer
display panel
light
display module
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Application number
PCT/CN2017/083542
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English (en)
Chinese (zh)
Inventor
凌严
朱虹
Original Assignee
上海箩箕技术有限公司
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Publication date
Application filed by 上海箩箕技术有限公司 filed Critical 上海箩箕技术有限公司
Priority to PCT/CN2017/083542 priority Critical patent/WO2018205121A1/fr
Publication of WO2018205121A1 publication Critical patent/WO2018205121A1/fr

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F18/00—Pattern recognition

Definitions

  • the present invention relates to the field of optical fingerprint recognition, and in particular, to a display module.
  • the fingerprint imaging recognition technology is a technique of acquiring a fingerprint image of a human body through a fingerprint sensor and then comparing it with existing fingerprint imaging information in the system to determine whether it is correct or not, thereby realizing the identity recognition technology. Due to its ease of use and the uniqueness of human fingerprints, fingerprint recognition technology has been widely used in various fields. For example, the public security bureau, customs and other security inspection areas, building access control systems, and consumer goods such as personal computers and mobile phones.
  • Fingerprint imaging recognition technology can be realized by various techniques such as optical imaging, capacitive imaging, and ultrasonic imaging. Relatively speaking, optical fingerprint imaging technology has relatively good imaging effect and relatively low equipment cost.
  • a fingerprint recognition function has been integrated in a display module, but it is usually a capacitive fingerprint recognition principle.
  • a fingerprint recognition function has been integrated in a display module, but it is usually a capacitive fingerprint recognition principle.
  • a capacitive fingerprint recognition principle For more information about the integrated fingerprint recognition function in the display module, refer to the Chinese invention patent application with the publication number CN106024833A.
  • the display module structure of the existing integrated fingerprint recognition function needs to be improved, and the performance needs to be improved.
  • the problem solved by the present invention is to provide a display module to better integrate the fingerprint recognition function in the display module, thereby obtaining a clear fingerprint image while displaying.
  • the present invention provides a display module, comprising: a display module, comprising: a protective layer; a self-luminous display panel, the self-luminous display panel is located under the protective layer; Passing through the self-luminous display panel; the lower surface of the protective layer has an upwardly concave groove, and the groove is located on the self-luminous display
  • the display module further includes: an optical fingerprint sensor, the optical fingerprint sensor is located under the self-luminous display panel; a dot backlight, the point backlight is at least partially located in the recess The light emitted by the point backlight enters the protective layer from at least one surface of the groove.
  • the self-luminous display panel includes a first transparent substrate, a second transparent substrate, and a self-luminous circuit layer between the first transparent substrate and the second transparent substrate; Display pixel units; each of the display pixel units includes at least one non-transmissive region and at least one light transmissive region.
  • a filter layer is disposed between the optical fingerprint sensor and the self-luminous display panel.
  • a surface having a smallest distance from the self-luminous display panel is a first surface, and light emitted by the backlight enters the protective layer from the first surface.
  • a top surface of the groove is parallel to an upper surface and a lower surface of the protective layer; the first surface is a plane, the first surface and a top surface of the groove and the protection The angle between the lower surfaces of the layers is a right angle.
  • a top surface of the groove is parallel to an upper surface and a lower surface of the protective layer; the first surface is a plane, the first surface and a top surface of the groove and the protection
  • the angle between the lower surfaces of the layers is an obtuse angle.
  • the first surface is a concave curved surface, and an upper edge of the concave curved surface is connected to a top surface of the groove, and a lower edge of the concave curved surface is connected to a lower surface of the protective layer.
  • the first surface has an anti-reflection film capable of increasing the proportion of light from the backlight into the protective layer.
  • a portion facing the backlight has a light shielding layer; or, a top surface of the groove has a light shielding layer; or, an upper surface of the protective layer
  • the portion facing the backlight has a light shielding layer, and the top table of the groove
  • the face also has a light shielding layer.
  • a thickening layer is disposed between the self-luminous display panel and the protective layer.
  • the dot backlight is an LED lamp; or the dot backlight is two or more LED lamps, the plurality of grooves are plural, and one of the LED lamps is located in one of the grooves. .
  • the dot backlight is two or more LED lamps, and the two or more LED lamps are evenly distributed in the same groove.
  • the optical fingerprint sensor includes two or more partial optical sensing regions, and one of the LED lights corresponds to one of the local optical sensing regions.
  • the display module further includes a touch structure, and the touch structure includes Two or more partial touch regions, one of the partial optical sensing regions corresponding to one of the partial touch regions.
  • the optical fingerprint sensor includes three or more local optical sensing regions, and the number of the LED lamps is less than the number of the local optical sensing regions;
  • the display module further includes a touch structure, and the touch The structure includes three or more partial touch regions, and one of the partial optical sensing regions corresponds to one of the partial touch regions.
  • each of the LED lamps corresponds to a plurality of adjacent partial optical sensing regions; and the partial optical sensing regions corresponding to the two adjacent LED lamps are identical.
  • a protective layer, a self-luminous display panel, and an optical fingerprint sensor are disposed from top to bottom.
  • light can pass through the self-luminous display panel from top to bottom.
  • the lower surface of the protective layer has a groove that is recessed upward and upward, the groove is located obliquely above the self-luminous display panel, and the point backlight is at least partially located in the groove, the dot backlight The emitted light enters the protective layer from at least one of the surfaces of the recess.
  • the light emitted by the point backlight does not need to pass through the self-luminous display panel and the optical fingerprint sensor, and enters the protective layer, and at the contact interface between the protective layer and the finger, the light undergoes corresponding optical phenomena such as reflection and refraction, and then Return the corresponding reflected light to protect
  • the self-illuminating display panel below the protective layer the reflected light passes through the self-luminous display panel and reaches the optical fingerprint sensor, and is received by the optical fingerprint sensor, so that the optical fingerprint sensor obtains the corresponding fingerprint image, and the collected fingerprint image is clear, and finally
  • the display module integrates good fingerprint recognition.
  • the first display area corresponding to the optical fingerprint sensor is controlled to stop working or display a specific screen when the optical fingerprint sensor performs the fingerprint image collecting operation, and control the second display area display.
  • the information associated with the fingerprint image collection work, so that the display function and the fingerprint recognition function are combined to achieve a better user experience.
  • FIG. 1 is a schematic cross-sectional view of a display module according to an embodiment of the present invention.
  • FIG. 2 is a schematic cross-sectional view of a display module according to another embodiment of the present invention.
  • FIG. 3 is a schematic cross-sectional view of a display module according to another embodiment of the present invention.
  • FIG. 4 is a schematic cross-sectional view of a display module according to another embodiment of the present invention.
  • FIG. 5 is a schematic cross-sectional view of a display module according to another embodiment of the present invention.
  • FIG. 6 is a schematic bottom view of a display module according to another embodiment of the present invention.
  • FIG. 7 is a schematic bottom view of a display module according to another embodiment of the present invention.
  • the prior art mostly uses capacitive fingerprint imaging technology to integrate with a display module of a self-luminous display panel.
  • the present invention provides a display module in which an optical fingerprint sensor and a self-luminous display panel are integrated, so that a fingerprint recognition function can be realized while realizing display, and a display module is enabled by a corresponding structural design.
  • Group can collect clear fingers The image image realizes the display function and the fingerprint recognition function to cooperate with each other, so that the user has a better use experience for the display module.
  • the upper and lower relationship in other contents is defined by placing the display module under the eyes of the user and positioning the protective layer at the top. That is to say, if one structure is located above the other structure, it means that when the display module is placed under the eyes of the user and the protective layer is at the top, the structure is closer to the user's eyes than the other structure. .
  • the embodiment of the invention provides a display module. Please refer to FIG. 1 .
  • the display module includes a protective layer 110, a self-luminous display panel 120, an optical fingerprint sensor 130, and a dot backlight 140.
  • the self-luminous display panel 120 is located below the protective layer 110. Light can pass through the self-luminous display panel 120 from top to bottom.
  • the lower surface of the protective layer 110 has an upwardly concave groove 111 which is located obliquely above the self-luminous display panel 120.
  • the point backlight 140 is partially located in the recess 111, and the light from the point backlight enters the protective layer 110 from one of the surfaces of the recess 111, as shown by the oblique upward arrow in FIG.
  • the oblique downward arrow in Figure 1 indicates the corresponding reflected light.
  • the refraction of light between different optical media structures is neglected in each of the various embodiments, as described herein.
  • the self-luminous display panel 120 may be directly under the protective layer 110 and may be directly laminated on the lower surface of the protective layer 110, that is, the two are in direct contact. In other cases, the self-luminous display panel 120 may also be adhered to the lower surface of the protective layer 110 by optical glue.
  • the optical adhesive can be used to avoid the presence of air between the protective layer 110 and the self-luminous display panel 120, thereby further improving the optical performance of the module.
  • the light can pass through the self-luminous display panel 120 from top to bottom, wherein the "from top to bottom” can be vertically downward, obliquely downward or meandering downward.
  • the light can pass through the self-luminous display panel from above the self-luminous display panel 120. 120, and continue to spread downward.
  • the self-luminous display panel 120 does not require light transmission in other directions (such as the front-rear direction and the left-right direction), and opaque light in these directions is better.
  • the dot backlight 140 is partially located within the recess 111.
  • the point backlight may be located entirely within the recess, i.e., the point backlight is at least partially located within the recess.
  • the depth of the groove 111 may be set between 0.1 mm and 0.5 mm.
  • a specific structure of the self-luminous display panel 120 can be as shown in FIG. 1 , including the first transparent substrate 121 , the second transparent substrate 122 , and the first The self-luminous circuit layer 123 between the transparent substrate 121 and the second transparent substrate 122.
  • the self-luminous circuit layer 123 in the self-luminous display panel 120 includes a plurality of display pixel units 1231. The area in which the pixel unit 1231 is located and the adjacent relationship of the respective display pixel units 1231 are indicated by a broken line in FIG.
  • each display pixel unit 1231 includes at least one non-transmissive region and at least one light transmissive region.
  • the self-luminous display panel 120 also includes a sealing structure (not labeled).
  • the sealing structure is also located between the first transparent substrate 121 and the second transparent substrate 122.
  • the sealing structure together with the first transparent substrate 121 and the second transparent substrate 122, seals the self-luminous circuit layer 123 between the first transparent substrate 121 and the second transparent substrate 122.
  • the material of the first transparent substrate 121 and the second transparent substrate 122 may be a light transmissive material, and the specific material may be inorganic glass or organic glass, or may be other plastic products other than organic glass.
  • the self-luminous display panel 120 may be an OLED display panel.
  • the display pixel unit 1231 of the self-luminous circuit layer 123 may include an anode layer, a hole injection layer (HIL), and a
  • the structure of the light layer (EML), the electron injection layer (EIL), and the cathode layer may further have a hole transport layer (HTL) and an electron transport layer (ETL), and may further include a TFT for driving the OLED, a driving metal line, and a storage capacitor. And other structures.
  • 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. Relaxes and emits light.
  • the above-mentioned light-emitting layer or the like may be located in the corresponding non-light transmitting region.
  • the display pixel unit 1231 has a corresponding light transmissive area.
  • the light transmissive area of one display pixel unit may be connected to the light transmissive area of another display pixel unit to form a wider transparent area.
  • the display pixel units are generally adjacent, and the area between the two display pixel units adjacent to each other is also a light transmissive area, thereby enabling the three light transmissive areas to be connected as one large light transmissive area.
  • the height of the light-transmitting region is set to be equal to the height of the self-light-emitting circuit layer 123, as shown in FIG. 1, so as to ensure that light can pass through the self-light-emitting circuit layer 123 from the light-transmitting region (it is noted that the self-light-emitting circuit layer 123)
  • the height of each position may be slightly different, but the height of the self-illuminating circuit layer 123 at least a portion of the position is equal to the height of the light transmitting region).
  • the light can pass through the self-illuminating circuit layer 123 from the light-transmitting area to ensure that the light can pass through the self-luminous display panel 120 from bottom to bottom, thereby ensuring that the display module can perform fingerprint image collection. It can be seen from the above that when the light passes obliquely downward through the self-luminous display panel 120, the light generally passes through the first transparent substrate 121, the light transmitting region and the second transparent substrate 122.
  • the gap between them can be set as a light-transmitting area, that is, on the basis of ensuring the corresponding structure and function, other structures of the display pixel unit 1231 can be made by using a light-transmitting structure as much as possible, so that more light can pass through.
  • An OLED display panel (this pass generally refers to passing through the height of display pixel unit 1231, which is also commonly referred to as thickness).
  • non-transparent area of the display pixel unit 1231 not the entire area is from top to bottom.
  • the structure above the light-emitting layer is transparent, so that the light emitted by the light-emitting layer can reach the user's eyes upward, thereby ensuring display of the OLED display panel. .
  • the optical fingerprint sensor 130 may include a fingerprint sensing circuit layer (not shown) and a substrate substrate (not shown). In one case, the fingerprint sensing circuit layer is located between the second transparent substrate 122 and the substrate. At this time, the optical fingerprint sensor 130 may be a TFT based on a glass or a plastic substrate (Thin Film Transistor). , the thin film transistor) process image sensor, that is, the substrate substrate may be glass or plastic, the optical fingerprint sensor 130 may also be an optical sensor based on a silicon substrate and fabricated by a CMOS process, that is, the substrate substrate is a silicon substrate; In another case, the base substrate is located between the second transparent substrate 122 and the fingerprint sensing electrical layer. At this time, the base substrate is a light transmissive material, such as a glass or plastic substrate. The optical fingerprint sensor 130 can be a back-illuminated image sensor based on a glass or plastic substrate, TFT process.
  • the fingerprint sensing circuit layer of the optical fingerprint sensor 130 includes a plurality of photosensitive pixel units (the photosensitive pixel unit has been mentioned before, not shown).
  • Each of the photosensitive pixel units includes a photodiode or other photosensitive device, and the corresponding fingerprint reflected light can be received by the photosensitive element.
  • the dot backlight 140 can be an LED light.
  • the light of the LED lamp may be near ultraviolet light, purple light, blue light, green light, yellow light, red light, near infrared light or white light.
  • the dot backlight 140 may also be two or more LED lamps, and the two or more LED lamps may be evenly distributed on different sides of the self-luminous display panel 120.
  • the self-luminous display panel 120 and the optical fingerprint sensor 130 may be directly stacked.
  • the “direct stacking” means that the optical fingerprint sensor 130 and the self-luminous display panel 120 are at least partially in contact, and the optical fingerprint sensor 130 and the self-luminous display panel 120 are generally flat on the upper and lower sides. In the flat structure, the two can be exactly the stacked form as shown in FIG.
  • Optical can also be used between the self-luminous display panel 120 and the optical fingerprint sensor 130. Glue is applied. The optical glue prevents air from being present between the self-luminous display panel 120 and the optical fingerprint sensor 130, thereby further improving the optical performance of the module.
  • a filter layer may be disposed between the optical fingerprint sensor and the self-luminous display panel, and the filter layer can at least partially transmit light emitted by a point backlight (eg, an LED lamp) while The filter layer filter layer is capable of absorbing or reflecting light of other wavelengths to prevent other light, such as ambient light or display light from a self-luminous display panel, from adversely affecting fingerprint recognition.
  • a point backlight eg, an LED lamp
  • the filter layer filter layer is capable of absorbing or reflecting light of other wavelengths to prevent other light, such as ambient light or display light from a self-luminous display panel, from adversely affecting fingerprint recognition.
  • the protective layer 110 may be a flat substrate or other shape having a flat portion.
  • the material of the protective layer 110 may be a transparent material, and the specific material may be inorganic glass or organic glass, or may be other plastic products other than organic glass.
  • the dot backlight 140 has a space (not labeled) between the surface of the groove 111, and the interval between the light of the point backlight 140 and the protective layer 110 can be adjusted by the size of the interval.
  • the presence of the spacing indicates that there is typically no direct contact between the point backlight 140 and the surface of the recess 111.
  • a point backlight may also be placed in contact with the surface of the recess.
  • the light emitted by the dot backlight 140 enters the protective layer 110 from the corresponding surface of the recess 111, and after reaching the upper surface of the protective layer 110, occurs at the interface formed by the finger fingerprint and the upper surface of the protective layer 110.
  • the optical phenomenon such as reflection and refraction generates corresponding reflected light; the reflected light returns obliquely downward to the protective layer 110 and passes through the protective layer 110 to reach the self-luminous display panel 120, and the light can pass through the self-luminous display panel 120 from top to bottom. Therefore, the reflected light can finally reach the optical fingerprint sensor 130 and be received by the photosensitive pixel unit (the photosensitive pixel unit refers to the subsequent content) in the optical fingerprint sensor 130, thereby enabling fingerprint image acquisition and implementing the fingerprint recognition function.
  • the light emitted by the dot backlight 140 has an oblique upward propagation angle (that is, the light emitted by the dot backlight 140 starts to propagate upward or obliquely upward without directly traveling downward toward the self-luminous display panel 120). Therefore, it is ensured that the light emitted by the point backlight 140 must pass through the interface at the upper surface of the protective layer 200 and the fingerprint of the finger. After the optical phenomenon such as reflection and refraction occurs, the self-luminous display panel 120 is again entered. That is, the present embodiment avoids the presence of such a light that is emitted by the point backlight 140 and is in the dot backlight 140.
  • the optical phenomenon such as reflection and refraction occurs at the interface between the upper surface of the protective layer 200 and the finger fingerprint, and directly enters the self-luminous display panel 120.
  • This light does not carry fingerprint image information.
  • the fingerprint image obtained by the optical fingerprint sensor 130 is blurred.
  • the optical fingerprint sensor 130 and the self-luminous display panel 120 are both located under the protective layer 110.
  • the protective layer 110 has an upwardly concave groove 111.
  • the dot-shaped backlight 140 is disposed on the protective layer 110.
  • the recess 111 in the middle makes the overall mechanism of the entire display module simpler and the thickness can be made thinner.
  • the angle between the corresponding light and the region for contacting the fingerprint in the upper surface of the protective layer 110 is an acute angle.
  • the light emitted by the dot backlight 140 can be reflected and refracted at the interface between the upper surface of the protective layer 110 and the finger fingerprint at a corresponding offset, and most of the effective reflected light is irradiated to the optical fingerprint sensor 130.
  • the entire display module does not require a structure such as a light guide plate, and can realize fingerprint image recognition, form a clear fingerprint image, and simplify the structure and reduce the cost.
  • the dot backlight 140 is located in the recess 111 in the protective layer 110. Therefore, the distance between the dot backlight 140 and the upper surface of the protective layer 110 is smaller, which also causes the light of the dot backlight 140 to reach the upper surface of the protective layer 110. At the same time, the angle between the normal line and the normal line perpendicular to the upper surface of the protective layer 110 is increased; on the other hand, refraction occurs when light enters the first surface, so that the above angle can be increased again.
  • the increase of the angle brings two advantages: firstly, the width of the light region reflected into the optical fingerprint sensor is increased, and the photosensitive region of the optical fingerprint sensor can be better utilized to form a fingerprint image with a larger area; Second, a part of the light that is irradiated to the interface between the finger fingerprint valley and the upper surface of the protective layer 110 can cause total reflection in the interface between the upper surface of the protective layer 110 and the air, and illuminate the ridge of the finger fingerprint.
  • the light rays at the interface in contact with the upper surface of the protective layer 110 are normally subjected to optical phenomena such as reflection and refraction. At this time, the contrast of different positions (i.e., valley position and ridge position) of the finger fingerprint image is remarkably improved, and the quality of the fingerprint image is improved.
  • the dot backlight 140 is disposed under the protective layer 110, and is disposed in the groove 111 obliquely above the self-luminous display panel 120, and the optical fingerprint sensor 130 is disposed under the self-luminous display panel 120.
  • the backlight 140 is also located outside (optically above) the optical fingerprint sensor 130. Under the premise that the point backlight 140 is located on the side of the self-luminous display panel 120 and the optical fingerprint sensor 130, the light emitted by the point backlight 140 is further introduced into the protective layer 110 from the surface of the groove 111.
  • the light emitted by the backlight 140 does not have to pass through the self-luminous display panel 120 and the optical fingerprint sensor 130 to enter the protective layer 110, thereby being used for the collection of the finger fingerprint image, that is, the collection of the finger fingerprint image, and the utilization of the corresponding light is improved.
  • the amount of signals that the final optical fingerprint sensor 130 can receive is improved, and the collected fingerprint images are clear. Therefore, the display module integrates a good fingerprint recognition function.
  • the fingerprint image can be collected in the display area of the display module by using the corresponding use method, thereby reducing the appearance size of the electronic product to which the display panel is applied, and improving the electronic product.
  • the proportion of screens increases the aesthetic appearance of electronic products (for example, it can increase the screen ratio of mobile phone products and improve the appearance of mobile phone products).
  • a display area of the self-luminous display panel opposite to the optical fingerprint sensor is defined as a first display area, and a display area of other parts is defined as a second display area; when the optical fingerprint sensor performs fingerprint image collection work
  • the first display area is controlled to stop displaying work or displaying a specific picture.
  • the second display area is controlled to display information associated with the fingerprint image collection work.
  • the usage method may further develop an application scenario of the fingerprint recognition function. For example, before the optical fingerprint sensor is not working, the first display area is displayed with a corresponding display icon, and the user is instructed to put a finger into the icon. When the user puts a finger into the display After the area of 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 optical fingerprint sensor to enter the working state. At this time, pressing the fingerprint The fingerprint image is collected by the optical fingerprint sensor below the first display area to complete the fingerprint image collection function, and can be further used for identifying the existing fingerprint image stored internally, and further utilizing functions such as encryption/unlocking.
  • Another embodiment of the present invention provides another display module. Please refer to FIG. 2 .
  • the display module includes a protective layer 210, a self-luminous display panel 220, an optical fingerprint sensor 230, and a dot backlight 240.
  • the self-luminous display panel 220 is located below the protective layer 210. Light can pass through the self-luminous display panel 220 from top to bottom.
  • the lower surface of the protective layer 210 has an upwardly concave groove 211 which is located obliquely above the self-luminous display panel 220.
  • the dot backlight 240 is partially located in the recess 211, and the light emitted by the dot backlight 240 enters the protective layer 210 from one of the surfaces of the recess 211, as shown by the oblique upward arrow in FIG.
  • the oblique downward arrow in Figure 2 indicates the corresponding reflected light.
  • the self-luminous display panel 220 includes a first transparent substrate 221 , a second transparent substrate 222 , and a self-luminous circuit layer 223 between the first transparent substrate 221 and the second transparent substrate 222 .
  • the optical fingerprint sensor 230 is located below the second transparent substrate 222.
  • the self-luminous circuit layer 223 in the self-luminous display panel 220 includes a plurality of display pixel units 2231. Each display pixel unit 2231 includes at least one non-transmissive region and at least one light transmissive region. The structure allows light to pass through the self-luminous display panel 220 from top to bottom.
  • the surface having the smallest distance from the self-luminous display panel 220 is a first surface (not labeled), and light emitted from the dot backlight 240 enters the protective layer 210 from the first surface.
  • the distance from each surface to the optical fingerprint sensor is the distance from the surface center of each surface to the optical fingerprint sensor.
  • the top surface of the recess 211 is parallel to both the upper and lower surfaces of the protective layer 210.
  • the first surface is a plane, and an angle between the first surface and the top surface of the groove 211 and the lower surface of the protective layer 210 is an obtuse angle, that is, the first surface is an inclined plane, as shown in FIG. 2 . Shown.
  • This first surface which is inclined, helps more light to be larger
  • the incident angle reaches the upper surface of the protective layer 210, thereby finally enabling the optical fingerprint sensor 230 to utilize a larger area for fingerprint image acquisition, and the obtained reflected light is a light with more contrast, so the fingerprint recognition of the display module Performance is improved.
  • the top surface of the recess 211 has a light shielding layer 250 opposite to the dot backlight 240.
  • the light shielding layer 250 is disposed at the corresponding position in order to block the point backlight 240 from being detected by the user.
  • Another embodiment of the present invention provides another display module. Please refer to FIG. 3.
  • the display module includes a protective layer 310, a self-luminous display panel 320, an optical fingerprint sensor 330, and a dot backlight 340.
  • the self-luminous display panel 320 is located below the protective layer 310. Light can pass through the self-luminous display panel 320 from top to bottom.
  • the lower surface of the protective layer 310 has an upwardly concave groove 311 which is located obliquely above the self-luminous display panel 320.
  • the point backlight 340 is partially located in the recess 311, and the light emitted by the dot backlight 340 enters the protective layer 310 from one of the surfaces of the recess 311, as shown by the oblique upward arrow in FIG.
  • the oblique downward arrow in Figure 3 indicates the corresponding reflected light.
  • the self-luminous display panel 320 includes a first transparent substrate 321 , a second transparent substrate 322 , and a self-luminous circuit layer 323 between the first transparent substrate 321 and the second transparent substrate 322 .
  • the optical fingerprint sensor 330 is located below the second transparent substrate 322.
  • the self-luminous circuit layer 323 in the self-luminous display panel 320 includes a plurality of display pixel units 3231. Each display pixel unit 3231 includes at least one non-transmissive region and at least one light transmissive region. The structure allows light to pass through the self-luminous display panel 320 from top to bottom.
  • the surface having the smallest distance from the self-luminous display panel 320 is a first surface (not labeled), and light emitted from the dot backlight 340 enters the protective layer 310 from the first surface.
  • the distance from each surface to the optical fingerprint sensor is the distance from the surface center of each surface to the optical fingerprint sensor.
  • the top surface of the groove 311 is parallel to both the upper and lower surfaces of the protective layer 310.
  • the first surface is a concave curved surface, and an upper edge of the concave curved surface is coupled to a top surface of the groove, and a lower edge of the concave curved surface is coupled to a lower surface of the protective layer.
  • the first surface of the concave curved surface is easier to process, and the protective layer 310 has a higher yield and a lower cost.
  • a portion of the upper surface of the protective layer 310 that faces the point backlight 340 has a light shielding layer 350.
  • the light shielding layer 350 is disposed at the corresponding position in order to block the dot backlight 340 from being detected by the user.
  • a light shielding layer may be provided on a portion of the upper surface of the protective layer that faces the point backlight, and a top surface of the groove also has a light shielding layer.
  • Another embodiment of the present invention provides another display module. Please refer to FIG. 4.
  • the display module includes a protective layer 410, a self-luminous display panel 420, an optical fingerprint sensor 430, and a point backlight 440.
  • the self-luminous display panel 420 is located below the protective layer 410. Light can pass through the self-luminous display panel 420 from top to bottom.
  • the lower surface of the protective layer 410 has an upwardly concave groove 411 which is located obliquely above the self-luminous display panel 420.
  • the point backlight 440 is partially located in the recess 411, and the light emitted from the dot backlight 440 enters the protective layer 410 from one of the surfaces of the recess 411, as shown by the oblique upward arrow in FIG.
  • the oblique downward arrow in Figure 4 indicates the corresponding reflected light.
  • the self-luminous display panel 420 includes a first transparent substrate 421 , a second transparent substrate 422 , and a self-luminous circuit layer 423 between the first transparent substrate 421 and the second transparent substrate 422 .
  • the optical fingerprint sensor 430 is located below the second transparent substrate 422.
  • the self-luminous circuit layer 423 in the self-luminous display panel 420 includes a plurality of display pixel units 4231. Each display pixel unit 4231 includes at least one non-transmissive region and at least one light transmissive region. The structure allows light to pass through the self-luminous display panel 420 from top to bottom.
  • the surface having the smallest distance from the self-luminous display panel 420 is a first surface (not labeled), and light emitted from the dot backlight 440 enters the protective layer 410 from the first surface.
  • the distance from each surface to the optical fingerprint sensor is the distance from the surface center of each surface to the optical fingerprint sensor.
  • the top surface of the groove 411 is parallel to both the upper and lower surfaces of the protective layer 410.
  • the first surface is planar, and the first surface and the top surface of the recess 411 and protection
  • the angle of the lower surface of the layer 410 is an obtuse angle, that is, the first surface is an inclined plane at this time, as shown in FIG.
  • This first surface, which is inclined helps more light reach the upper surface of the protective layer 410 at a greater angle of incidence, thereby ultimately enabling the optical fingerprint sensor 430 to utilize a larger area for fingerprint image acquisition, and
  • the reflected light obtained is a light with a more contrasting contrast, and thus the fingerprint recognition performance of the display module is improved.
  • the top surface of the recess 411 has a light shielding layer 450 that is opposite the point backlight 440.
  • the light shielding layer 450 is disposed at the corresponding position in order to block the dot backlight 440 from being detected by the user.
  • the first surface has an anti-reflection film 460 that increases the proportion of light from the point backlight 440 entering the protective layer 410.
  • a thickened layer 470 is disposed between the self-luminous display panel 420 and the protective layer 410.
  • the thickening layer 470 can be an optical glue, that is, the self-luminous display panel 420 can be pasted under the protective layer 410.
  • the material of the optical adhesive layer may specifically be a thermosensitive optical adhesive layer, a photosensitive optical adhesive layer or an optical double-sided adhesive tape. The presence of the optical glue can minimize the presence of air between the protective layer and the self-luminous display panel, thereby further improving the optical performance of the module.
  • the thickening layer may not be an optical glue, but other solid substrates, and the thickening layer may be bonded to the protective layer and the self-luminous display panel by a corresponding adhesive layer.
  • the thickening layer may be a structure having no electrical function, and may also be a touch sensing layer having a transparent electrode.
  • the self-luminous display panel itself is integrated with a touch sensing function.
  • the self-luminous display panel and the optical fingerprint sensor may also have an optical glue, that is, the self-luminous display panel and the optical fingerprint sensor may be pasted together by optical glue, and the optical fingerprint sensor is pasted on the self-luminous display. Below the panel.
  • Another embodiment of the present invention provides another display module. Please refer to FIG. 5.
  • the display module includes a protective layer 510, a self-luminous display panel 520, an optical fingerprint sensor 530, and a point backlight (not labeled).
  • the self-luminous display panel 520 is located below the protective layer 510. Light can pass through the self-luminous display panel 520 from top to bottom.
  • Protective layer 510 The lower surface has two recesses that are recessed upwardly, respectively a recess 511 and a recess 512, and the recess 511 and the recess 512 are both located obliquely above the self-luminous display panel 520.
  • the dot backlight is two LED lights, which are an LED lamp 541 and an LED lamp 542, respectively.
  • the LED lamp 541 and the LED lamp 542 are respectively located on the left side and the right side of the self-luminous display panel 520, so that they are evenly distributed.
  • the dot backlight is two or more LED lamps, and the LED lamps are evenly distributed on different sides of the self-luminous display panel.
  • the LED lamp 541 is partially located in the recess 511, and the light emitted from the LED lamp 541 enters the protective layer 510 from one of the surfaces of the recess 511 as indicated by an arrow obliquely upward from left to right in FIG.
  • the arrow diagonally downward from left to right in Fig. 5 indicates the corresponding reflected light.
  • the LED lamp 542 is partially located in the recess 512, and the light emitted by the LED lamp 542 enters the protective layer 510 from one of the surfaces of the recess 512 as indicated by an arrow obliquely upward from right to left in FIG.
  • the arrow diagonally downward from right to left in Fig. 5 indicates the corresponding reflected light.
  • the self-luminous display panel 520 includes a first transparent substrate 521 , a second transparent substrate 522 , and a self-luminous circuit layer 523 between the first transparent substrate 521 and the second transparent substrate 522 .
  • the optical fingerprint sensor 530 is located below the second transparent substrate 522.
  • the self-luminous circuit layer 523 in the self-luminous display panel 520 includes a plurality of display pixel units 5231. Each display pixel unit 5231 includes at least one non-transmissive region and at least one light transmissive region. The structure allows light to pass through the self-luminous display panel 520 from top to bottom.
  • the surface having the smallest distance from the self-luminous display panel 520 is a first surface (not labeled), and the light emitted from the LED lamp 541 (the LED lamp 542) enters the protection from the first surface.
  • Layer 510 It should be noted that the distance from each surface to the optical fingerprint sensor is the distance from the surface center of each surface to the optical fingerprint sensor.
  • the top surface of the groove 511 (the groove 512) and the upper surface of the protective layer 510 and the lower surface The faces are all parallel.
  • the first surface is a plane, and the angle between the first surface and the top surface of the groove 511 (the groove 512) and the lower surface of the protective layer 510 is a right angle, that is, the first surface is vertical at this time.
  • Straight plane as shown in Figure 5.
  • This first planar surface is more conducive to more light reaching the upper surface of the protective layer 510 at a greater angle of incidence, thereby ultimately enabling the optical fingerprint sensor 530 to utilize a larger area for fingerprint image acquisition, and
  • the reflected light obtained is a light with a more contrast contrast, and therefore, the fingerprint recognition performance of the display module is improved.
  • FIG. 6 is a bottom view showing FIG. 6 in order to show the structure under the protective layer, showing a schematic view from the lower surface of the protective layer to the upper surface direction, so that the corresponding points can be seen.
  • Structure such as backlight, optical fingerprint sensor, self-luminous display panel and protective layer. Therefore, the cross-sectional structure of FIG. 6 can refer to FIG. 1 to FIG. 5, and conversely, the bottom-view structure of FIGS. 1 to 5 can refer to FIG.
  • the display module includes a protective layer 610, a self-luminous display panel 620, an optical fingerprint sensor 630, and a point backlight 640; the protective layer 610 is located at the bottom, and the self-luminous display is above the protective layer 610.
  • the panel 620 is an optical fingerprint sensor 630 above the self-luminous display panel 620, and the dot backlight 640 is also located above the protective layer 610 and is located beside the self-luminous display panel 620 and the optical fingerprint sensor 630.
  • the protective layer 610 has a recess 611 in the side of the self-luminous display panel 620 and the optical fingerprint sensor 630.
  • a dot backlight 640 is located within the recess 611.
  • the display module provided in the embodiment can also be seen: the self-luminous display panel 620 is located on the protective layer 610.
  • the optical fingerprint sensor 630 is located below the self-luminous display panel 620; the lower surface of the protective layer 610 has an upwardly recessed recess 611, the recess 611 is located obliquely above the self-illuminating display panel 620; and the dot-shaped backlight 640 is located in the recess 611. Inside, the light emitted by the dot backlight 640 enters the protective layer from one surface of the recess 611. 610.
  • the corresponding contents of FIG. 1 to FIG. 5 can be combined.
  • the self-luminous display panel 620 includes a first transparent substrate (not shown), a second transparent substrate (not shown), and a self-luminous circuit layer between the first transparent substrate and the second transparent substrate (not shown)
  • the self-luminous circuit layer in the self-luminous display panel 620 includes a plurality of display pixel units (not shown); each display pixel unit includes at least one non-transmissive region and at least one light transmissive region. The corresponding contents of FIG. 1 to FIG. 5 can be combined.
  • the dot backlight 640 is four LED lights (not labeled), and the four LED lights are evenly distributed on the same side of the optical fingerprint sensor.
  • the groove 611 is large, and at the same time, the four LED lamps are at least partially located in the groove 611. At this time, the four LED lamps are evenly distributed in the groove 611.
  • the optical fingerprint sensor 630 corresponds to four local optical sensing regions (not labeled). In the plane shown in FIG. 6, the optical fingerprint sensor 630 is divided into four partial optical sensing regions by three broken lines. One LED light corresponds to a local optical sensing area.
  • the display module further includes a touch structure, the touch structure includes four partial touch regions, and a local optical sensing region corresponds to a partial touch region (a partial touch region is also Corresponds to a local optical sensing area).
  • a partial touch region is also Corresponds to a local optical sensing area.
  • the corresponding partial touch area and the local optical sensing area may completely coincide.
  • an LED lamp can be used as a light source of a local optical sensing area, and at the same time, the local touch area is used to determine which local touch area the finger is in contact with.
  • the corresponding local optical sensing area and the LED light are controlled to work, and the fingerprint image of the finger is collected.
  • the entire optical fingerprint sensor is not required to perform fingerprint collection, which not only improves the collection speed of the fingerprint image but also reduces the speed. Power consumption.
  • the touch structure may be a capacitive touch structure, and the capacitive touch structure may be located between the protective layer and the self-luminous display panel (eg, being laminated or fabricated)
  • the lower surface of the protective layer is, for example, laminated or fabricated on the upper surface of the self-luminous display panel.
  • the capacitive touch structure may also be integrated inside the self-luminous display panel.
  • the dot backlight may also be two, three or more LED lights that are evenly distributed on the same side of the optical fingerprint sensor.
  • the number of the local optical sensing area and the local touch area is equal to the number of LED lights, and the specific corresponding manner is also one-to-one correspondence. Please refer to the corresponding content above.
  • each of the partial optical sensing regions has a plurality of partial touch regions, thereby improving the accuracy of detecting the position of the finger pressing and improving the accuracy of positioning the finger pressing.
  • FIG. 7 is a bottom view, that is, FIG. 7 is a schematic view showing the structure under the protective layer, which is viewed from the lower surface of the protective layer to the upper surface direction, so that the corresponding point can be seen.
  • Structure such as backlight, optical fingerprint sensor, self-luminous display panel and protective layer. Therefore, the cross-sectional structure of FIG. 7 can refer to FIG. 1 to FIG. 5, and conversely, the bottom-view structure of FIGS. 1 to 5 can refer to FIG.
  • the display module includes a protection layer 710, a self-luminous display panel 720, an optical fingerprint sensor 730, and a point backlight (the dot backlight is not separately labeled, and the dot backlight includes the following six LED light); protective layer 710 is located at the bottom, above the protective layer 710 is a self-luminous display panel 720, above the self-luminous display panel 720 is an optical fingerprint sensor 730, and the point backlight is also located above the protective layer 710, and It is located next to the self-luminous display panel 720 and the optical fingerprint sensor 730.
  • the protective layer 710 has a groove 711 in the side of the self-luminous display panel 720 and the optical fingerprint sensor 730.
  • the point backlight is located within the recess 711.
  • the display module provided in the embodiment can also be seen: the self-luminous display panel 720 is located on the protective layer 710. Bottom; optical fingerprint sensor 730 is located in self-luminous display panel
  • the lower surface of the protective layer 710 has an upwardly concave groove 711, and the groove 711 is located obliquely above the self-luminous display panel 720; the dot-shaped backlight is located in the groove 711, and the point backlight is emitted.
  • the self-luminous display panel 720 includes a first light transmissive substrate (not shown), a second light transmissive substrate (not shown), and a self-illuminating circuit layer between the first light transmissive substrate and the second light transmissive substrate (not shown)
  • the self-luminous circuit layer in the self-luminous display panel 720 includes a plurality of display pixel units (not shown); each display pixel unit includes at least one non-transmissive region and at least one light transmissive region. The corresponding contents of FIG. 1 to FIG. 5 can be combined.
  • the dot backlight is six LED lights, which are LED light a, LED light b, LED light c, LED light d, LED light e and LED light f, and the six LED lights are evenly distributed.
  • the optical fingerprint sensor 730 On the same side of the optical fingerprint sensor 730, and both are located within the recess 711.
  • the optical fingerprint sensor 730 correspondingly includes fourteen local optical sensing regions, which are local optical sensing regions 1-14, respectively. In the plane shown in Fig. 7, the optical fingerprint sensor 730 is divided into fourteen partial optical sensing regions by thirteen dashed lines. One LED light corresponds to four local optical sensing areas.
  • the LED lamp a corresponds to the local optical sensing area 1-4
  • the LED lamp b corresponds to the local optical sensing area 3-6
  • the LED lamp c corresponds to the local optical sensing area 5-8
  • the LED lamp d corresponds to the local optical In the sensing area 7-10
  • the LED lamp e corresponds to the local optical sensing area 9-7
  • the LED lamp f corresponds to the local optical sensing area 11-14.
  • the width of the corresponding area of the LED lamp a to the LED lamp f is as shown by Ra to Rf in FIG. 7, and these widths can prove the corresponding relationship between the LED lamp and the local optical sensing area, that is, one LED lamp corresponds to four consecutive local optical sensing regions. .
  • the corresponding partial optical sensing regions are identical, that is, they all correspond to the local optical sensing regions 3-4.
  • "partially identical" indicates that they each correspond to different local optical sensing regions, for example, LED lamp a corresponds to local optical sensing region 1-2, and LED lamp b corresponds to local optical sensing region 5-6.
  • the display module further includes a touch structure
  • the touch structure includes fourteen partial touch regions
  • a local optical sensing region corresponds to a partial touch region, that is, local optics.
  • the sensing area and the local touch area are in one-to-one correspondence.
  • the corresponding partial touch area and the local optical sensing area completely coincide.
  • the working state of the corresponding local optical sensing area (for example, switching between two states of working and non-working) can be controlled by using the local touch area, and the corresponding content of the foregoing embodiment can be referred to.
  • the number of LED lamps is less than the number of the local optical sensing regions, and the plurality of partial optical sensing regions correspond to one LED lamp, and each of the LED lamps corresponds to multiple phases. Adjacent partial optical sensing regions, and the partial optical sensing regions corresponding to the two adjacent LED lamps are identical.
  • the corresponding arrangement of the above structure and the area is also because the imaging principle of the present invention shows that the display module can only use one LED light at a time when fingerprinting (if two LED lights are used at the same time) There is interference to make the image blurred; and if the partial optical sensing areas corresponding to the two adjacent LED lights do not have the same part, when the finger is pressed at the boundary of the two local optical sensing areas, it usually needs to be performed. Two images were taken to obtain different partial fingerprint images and then combined together. However, this embodiment reduces the distance between the LED lamps by providing more than one LED lamp.
  • the number of local optical sensing regions is increased, thereby achieving that: a plurality of adjacent partial optical sensing regions correspond to one LED lamp, and the adjacent two of the LED lamps correspond to the The local optical sensing regions are partially identical.
  • the finger pressing position only the LED lamp closest to the finger pressing position needs to be opened for fingerprint image acquisition at a time, and the most suitable one of the LED lights can be used to collect the fingerprint image, so that one imaging can be realized. Can collect the corresponding fingerprint image. Therefore, the collection efficiency and the collection effect are further improved.
  • the spacing between the LED lamps much smaller than the pressing coverage width of the fingers (for example, the spacing of the LED lamps can be less than 5 mm).

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Abstract

L'invention concerne un module d'affichage, comprenant : une couche de protection (110, 210, 310, 410, 510, 610, 710) et un panneau d'affichage auto-électroluminescent (120, 220, 320, 420, 520, 620, 720), le panneau d'affichage auto-électroluminescent (120, 220, 320, 420, 520, 620, 720) étant situé au-dessous de la couche de protection (110, 210, 310, 410, 510, 610, 710); la lumière peut pénétrer à travers le panneau d'affichage auto-électroluminescent (120, 220, 320, 420, 520, 620, 720) de haut en bas ; une surface inférieure de la couche de protection est pourvue d'une rainure (111, 211, 311, 411, 511, 611, 711) évidée vers le haut ; et la rainure (111, 211, 311, 411, 511, 611, 711) est située diagonalement au-dessus du panneau d'affichage auto-électroluminescent (120, 220, 320, 420, 520, 620, 720). Le module d'affichage comprend en outre : un capteur d'empreinte digitale optique (130, 230, 330, 430, 530, 630, 730), le capteur d'empreinte optique (130, 230, 330, 430, 530, 630, 730) étant situé au-dessous du panneau d'affichage auto-électroluminescent (120, 220, 320, 420, 520, 620, 720) ; et une source de rétroéclairage en forme de point (140, 240, 340, 440, 540, 640), au moins une partie de la source de rétroéclairage en forme de point (140, 240, 340, 440, 540, 640) étant située dans la rainure (111, 211, 311, 411, 511, 611, 711), et la lumière émise par la source de rétroéclairage en forme de point (140, 240, 340, 440, 540, 640) entrant dans la couche de protection (110, 210, 310, 410, 510, 610, 710) à partir d'au moins une surface de la rainure (111, 211, 311, 411, 511, 611, 711). Le module d'affichage a une fonction intégrée de reconnaissance d'empreinte digitale optique.
PCT/CN2017/083542 2017-05-09 2017-05-09 Module d'affichage WO2018205121A1 (fr)

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PCT/CN2017/083542 WO2018205121A1 (fr) 2017-05-09 2017-05-09 Module d'affichage

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