Patent Description:
With the continuous upgrading of an electronic product, the electronic product such as a smart phone and a smart watch having a touch screen causes manufacturers to compete to launch differentiated products to attract consumers. One highlight in a current market is the electronic product having a fingerprint recognition function under a screen. A fingerprint recognition solution under a screen generally includes an optical fingerprint recognition solution and an ultrasonic fingerprint recognition solution. The optical fingerprint recognition has relatively high accuracy, a small device volume, and maturer and stabler performance, which is favored by the market.

The optical fingerprint recognition solution in the prior art is generally to arrange an optical fingerprint module under a display of the electronic product. The optical fingerprint module includes a sensor and a lens. The lens is located between the sensor and the display. Based on the principle of lens imaging, a light source of the optical fingerprint module is generally derived from a light-emitting unit inside the display, and at present, the display tends to be thinner and lighter. When a finger touches an upper surface of the display, a difference between a spacing between the fingerprint and the lens and a spacing between the light-emitting unit and the lens is relatively small, and the optical fingerprint module is easily focused on the light-emitting unit of the display. A moiré pattern consisting of alternating dark and bright regions is formed when a spatial frequency of the light-emitting unit approximates that of photosensitive pixels of the sensor during optical fingerprint imaging.

However, when a width of the moiré pattern approximates a width of the finger, the accuracy of the fingerprint recognition is easily reduced, which greatly affects use performance and user experience.

The document <CIT> provides a display panel, a display apparatus and a method for fingerprint recognition. The display panel includes a base layer, a light-emitting layer and a light-shielding layer having at least first and second imaging pinholes. The second imaging pinhole is disposed between two adjacent first imaging pinholes. The display panel further includes a light-sensitive fingerprint sensor layer and a fingerprint recognition light source generating first light during a first time period and second light during a second time period. The first light passes through the first imaging pinholes and the second imaging pinholes do not allow the first light to pass through, and the second light passes through the second imaging pinholes and the first imaging pinholes do not allow the second light to pass through.

Embodiments of this application provide an electronic device and a display assembly and a manufacturing method therefor, which effectively reduces or avoids a moiré pattern under a screen and enhances the accuracy of fingerprint recognition, thereby greatly improving use performance and user experience.

A first aspect of the embodiments of this application provides a display assembly, applicable to an electronic device having a fingerprint recognition function. The display assembly includes at least: a base layer, a light source layer, and a light scattering layer located between the base layer and the light source layer. The light source layer includes a light-emitting layer and non-light-emitting layers located on two sides of the light-emitting layer. An opening is provided on the light scattering layer. A projection region of the light-emitting layer on the light scattering layer covers the opening, and a projection region of a connection region between the non-light-emitting layer and the light-emitting layer on the light scattering layer is located outside the opening.

In the display assembly provided in the embodiments of this application, the light scattering layer is arranged between the base layer and the light source layer, the opening is provided on the light scattering layer, the projection region of the light-emitting layer on the light scattering layer covers the opening, and the projection region of the connection region between the non-light-emitting layer and the light-emitting layer on the light scattering layer is located outside the opening. Based on the principle of light scattering, when light on a side of the light-emitting layer toward the base layer is emitted from an edge of the opening, diffuse reflection occurs on the light scattering layer to form divergent light in different directions. In this way, the light scattering layer blurs the scattered light, and the image collected by the optical recognition assembly is not obviously "grainy" and is presented with evenly distributed bright spots. Therefore, optical space interference is avoided, and occurrence of an optical fingerprint moiré pattern is effectively reduced or avoided, thereby enhancing the accuracy of fingerprint recognition and greatly improving use performance and user experience.

In a possible implementation, the light scattering layer includes a transparent substrate and light scattering particles distributed in the transparent substrate. A refractive index of the light scattering particles is greater than a refractive index of the transparent substrate. In this way, the transparent substrate coated by the light scattering particles forms the light scattering layer, so as to scatter the emitted light.

In a possible implementation, a diameter of the light scattering particles ranges from <NUM> to <NUM>. The nano-scale light scattering particles are distributed in the transparent substrate, which can improve uniformity of the light scattering layer, thereby enhancing a scattering effect of the light scattering layer.

In a possible implementation, the light scattering layer includes at least one set of a first light scattering layer and a second light scattering layer that are stacked. A plurality of first protruding portions are provided on a side of the first light scattering layer close to the second light scattering layer, and a first groove is formed between two adjacent first protruding portions. A plurality of second protruding portions matching the first grooves are provided on a side of the second light scattering layer close to the first light scattering layer, a second groove is formed between two adjacent second protruding portions, and the second grooves match the first protruding portions. A refractive index of the first light scattering layer is different from a refractive index of the second light scattering layer.

In this way, a level structure having alternating high and low refractive indexes is formed by the first light scattering layer and the second light scattering layer. The light can be refracted on surfaces of concave-convex structures of the first light scattering layer and the second light scattering layer, thereby changing a propagation direction of the light and realizing the effect of light scattering.

In a possible implementation, shapes or sizes of at least some of the plurality of first protruding portions are different, and shapes or sizes of at least some of the plurality of second protruding portions are different. In this way, the surfaces of the concave-convex structures of the first light scattering layer and the second light scattering layer are in irregular shapes, which can further enhance the scattering effect of the light scattering layer.

In a possible implementation, the light source layer includes a plurality of light-emitting layers and a plurality of non-light-emitting layers. The light-emitting layers and the non-light-emitting layers are arranged at intervals. The light scattering layer includes a plurality of scattering sub-layers, and projection regions of the plurality of scattering sub-layers on the light source layer completely cover the plurality of non-light-emitting layers, and cover a part of the plurality of light-emitting layers adjacent to the plurality of non-light-emitting layers.

In a possible implementation, the light-emitting layers and the non-light-emitting layers are arranged at intervals in a first direction. A width of a projection region of each of the scattering sub-layers on each of the light-emitting layers in the first direction is greater than one fifth and less than four fifths of a width of each of the light-emitting layers in the first direction.

In a possible implementation, the light-emitting layers and the non-light-emitting layers are arranged at intervals in a second direction. A width of a projection region of each of the scattering sub-layers on each of the light-emitting layers in the second direction is greater than one fifth and less than four fifths of a width of each of the light-emitting layers in the second direction. The second direction is perpendicular to the first direction.

In a possible implementation, the display assembly further includes a middle layer. The middle layer is located between the base layer and the light source layer. A part of the middle layer is located between the light source layer and the light scattering layer, and an other part of the middle layer is located in the opening.

In a possible implementation, the middle layer includes at least one planarization layer. A part of the planarization layer is located between the light source layer and the light scattering layer, and an other part of the planarization layer is located in the opening. The planarization layer can play a role in planarizing a surface of the light scattering layer.

In a possible implementation, the middle layer includes at least two planarization layers and at least one passivation layer. The passivation layer is located between two adjacent planarization layers. One of the at least two planarization layers is located between the light source layer and the planarization layer. A part of the other of the at least two planarization layers is located between the passivation layer and the light scattering layer, and an other part of the other of the at least two planarization layers is located in the opening. The passivation layer can play the role in thermal insulation and blocking ion erosion.

In a possible implementation, the middle layer includes a first planarization layer, a second planarization layer, and a passivation layer located between the first planarization layer and the second planarization layer. A part of the first planarization layer is located between the passivation layer and the light scattering layer, and an other part of the first planarization layer is located in the opening. The second planarization layer is located between the light source layer and the passivation layer, at least one transistor is arranged in the second planarization layer, and the transistor is in contact with the passivation layer. The first planarization layer can play a role in planarizing a surface of the light scattering layer, and the second planarization layer can play a role in planarizing a surface of the passivation layer, thereby preventing uneven heights and poor flatness from causing adverse impact on the transistor.

In a possible implementation, the display assembly further includes a packaging layer. The light source layer is located between the packaging layer and the second planarization layer. The packaging layer can protect the light source layer, so as to prevent external conditions from affecting the light source layer, thereby avoiding damaging the use performance of the display assembly.

In a possible implementation, a bottom surface of the non-light-emitting layer is flush with a bottom surface of the light-emitting layer, and a top surface of the non-light-emitting layer is higher than a top surface of the light-emitting layer.

In a claimed implementation an inclined portion is arranged on an end of the non-light-emitting layer close to the light-emitting layer, and a thickness of the inclined portion gradually decreases from an end away from the light-emitting layer to an end close to the light-emitting layer. In this way, an emission angle of the emitted light on a side of the light-emitting layer toward the packaging layer can be increased, thereby increasing an emission range of the emitted light.

In a possible implementation, a thickness of the light scattering layer ranges from <NUM> to <NUM>. In this way, a thickness of the display assembly can be reduced to a certain extent, which is beneficial to realize lightness and thinness of the display assembly and further beneficial to realize lightness and thinness of the electronic device having the display assembly.

A second aspect of the embodiments of this application provides an electronic device. The electronic device includes at least a middle frame, an optical recognition assembly, and any one of the above display assemblies. The optical recognition assembly is located between the display assembly and the middle frame.

In the electronic device provided in the embodiments of this application, the electronic device includes at least the display assembly. In the display assembly, the light scattering layer is arranged between the base layer and the light source layer, the opening is provided on the light scattering layer, the projection region of the light-emitting layer on the light scattering layer covers the opening, and the projection region of the connection region between the non-light-emitting layer and the light-emitting layer on the light scattering layer is located outside the opening. Based on the principle of light scattering, when light on a side of the light-emitting layer toward the base layer is emitted from an edge of the opening, diffuse reflection occurs on the light scattering layer to form divergent light in different directions. In this way, the light scattering layer blurs the scattered light, and the image collected by the optical recognition assembly is not obviously "grainy" and is presented with evenly distributed bright spots. Therefore, optical space interference is avoided, and occurrence of an optical fingerprint moiré pattern is effectively reduced or avoided, thereby enhancing the accuracy of fingerprint recognition and greatly improving use performance and user experience.

In a possible implementation, the optical recognition assembly includes a lens and a sensor. The lens is located between the display assembly and the sensor. A fingerprint detection region is arranged on the display assembly, and a projection region of the fingerprint detection region on the middle frame at least partially coincides with a projection region of the lens on the middle frame.

A third aspect of the embodiments of this application provides a method for manufacturing a display assembly. The method includes at least: providing a base layer; forming a light scattering layer on the base layer; providing an opening on the light scattering layer; and forming a light source layer above the light scattering layer, where the light source layer includes a light-emitting layer and non-light-emitting layers located on two sides of the light-emitting layer, a projection region of the light-emitting layer on the light scattering layer covers the opening, and a projection region of a connection region between the non-light-emitting layer and the light-emitting layer on the light scattering layer is located outside the opening.

According to the method for manufacturing a display assembly provided in the embodiments of this application, the light scattering layer is formed on the base layer, the opening is provided on the light scattering layer, and the light source layer is formed above the light scattering layer. The projection region of the light-emitting layer on the light scattering layer covers the opening, and the projection region of the connection region between the non-light-emitting layer and the light-emitting layer on the light scattering layer is located outside the opening. Based on the principle of light scattering, when light on a side of the light-emitting layer toward the base layer is emitted from an edge of the opening, diffuse reflection occurs on the light scattering layer to form divergent light in different directions. In this way, the light scattering layer blurs the scattered light, and the image collected by the optical recognition assembly is not obviously "grainy" and is presented with evenly distributed bright spots. Therefore, optical space interference is avoided, and occurrence of an optical fingerprint moiré pattern is effectively reduced or avoided, thereby enhancing the accuracy of fingerprint recognition and greatly improving use performance and user experience.

In a possible implementation, the forming a light scattering layer on the base layer includes: providing light scattering particles and a transparent substrate; doping the light scattering particles in the transparent substrate to form the light scattering layer; and coating the light scattering layer on the base layer. A refractive index of the light scattering particles is greater than a refractive index of the transparent substrate. In this way, the transparent substrate coated by the light scattering particles forms the light scattering layer, so as to scatter the emitted light.

In a possible implementation, the forming a light scattering layer between the base layer and the light source layer includes: providing a first light scattering layer; arranging a plurality of first protruding portions on a first surface of the first light scattering layer, where a first groove is provided between two adjacent first protruding portions; and forming a second light scattering layer on the first surface having the plurality of first protruding portions arranged thereon, so that a plurality of second protruding portions matching the first grooves and a plurality of second grooves matching the first protruding portions are formed on a side of the second light scattering layer close to the first surface. A refractive index of the first light scattering layer is different from a refractive index of the second light scattering layer.

In a possible implementation, the forming a light source layer above the light scattering layer includes: forming a middle layer on the light scattering layer; and forming a light source layer on the middle layer. A part of the middle layer is located between the light source layer and the light scattering layer, and an other part of the middle layer is located in the opening.

Terms used in implementations of this application are only used for explaining the specific embodiments of this application, and are not intended to limit this application. The implementations of the embodiments of this application are described in detail below with reference to the accompanying drawings.

The embodiments of this application provide an electronic device, which may include, but is not limited to, mobile or fixed terminals having camera functions, such as a mobile phone, a tablet computer, a notebook computer, an ultra-mobile personal computer (ultra-mobile personal computer, UMPC), a hand-held computer, an intercom, a netbook, a point of sales (Point of sales, POS) machine, a personal digital assistant (personal digital assistant, PDA), a wearable device, a virtual reality device, a wireless USB flash disk, a Bluetooth speaker/headphone, or onboard factory-installed products, an automobile data recorder, a security device, and the like.

In the embodiment of this application, a mobile phone <NUM> is used as the above electronic device by way of example for description. The mobile phone <NUM> provided in the embodiment of this application may be a curved-display mobile phone or a flat-display mobile phone. In the embodiment of this application, the flat-display mobile phone is used as an example for description. <FIG> and <FIG> respectively show an overall structure and a split structure of the mobile phone <NUM>. A display assembly <NUM> of the mobile phone <NUM> provided in the embodiment of this application may be a water-drop screen, a notch screen, a full screen, or a punch-hole screen (see <FIG>). For example, a hole <NUM> is provided on the display assembly <NUM>. The punch-hole screen is used as an example for description below.

Referring to <FIG> and <FIG>, the mobile phone <NUM> may be a mobile phone <NUM> having a fingerprint recognition function. The mobile phone <NUM> may include at least a middle frame <NUM>, an optical recognition assembly <NUM>, and a display assembly <NUM>. The optical recognition assembly <NUM> is located between the display assembly <NUM> and the middle frame <NUM>, and a fingerprint detection region <NUM> may be arranged on a surface of a side of the display assembly <NUM> facing away from the optical recognition assembly <NUM>.

Still referring to <FIG>, the mobile phone <NUM> may further include a rear housing <NUM>. The display assembly <NUM> and the rear housing <NUM> are respectively located on two sides of the middle frame <NUM>. In addition, the mobile phone <NUM> may further include a battery <NUM> located between the middle frame <NUM> and the rear housing <NUM>. The battery <NUM> may be arranged on a side of the middle frame <NUM> facing the rear housing <NUM> (as shown in <FIG>), or the battery <NUM> may be arranged on a side of the middle frame <NUM> facing the display assembly <NUM>. For example, a battery compartment (not shown in the figure) may be arranged on a side of the middle frame <NUM> facing the rear housing <NUM>, and the battery <NUM> is mounted in the battery compartment. In some other examples, the mobile phone <NUM> may further include a circuit board <NUM>. The circuit board <NUM> may be arranged on the middle frame <NUM>. For example, the circuit board <NUM> may be arranged on a side of the middle frame <NUM> facing the rear housing <NUM> (as shown in <FIG>), or the circuit board <NUM> may be arranged on a side of the middle frame <NUM> facing the display assembly <NUM>. The display assembly <NUM> and the rear housing <NUM> are respectively located on two sides of the middle frame <NUM>.

When the mobile phone <NUM> is a flat-display mobile phone, the display assembly <NUM> may be an organic light-emitting diode (Organic Light-Emitting Diode, OLED) display assembly, or may be a liquid crystal display (Liquid Crystal Display, LCD) assembly. When the mobile phone <NUM> is a curved-display mobile phone, the display assembly <NUM> may be an OLED display assembly. It should be understood that the display assembly <NUM> may include a display and a touch device. The display is configured to output display content to a user, and the touch device is configured to receive a touch event inputted by the user on the display assembly <NUM>.

Still referring to <FIG>, the middle frame <NUM> may include a metal middle plate <NUM> and a border frame <NUM>, and the border frame <NUM> is arranged around a periphery of the metal middle plate <NUM>. Generally, the border frame <NUM> may include a top border frame, a bottom border frame, a left border frame, and a right border frame. The top border frame, the bottom border frame, the left border frame, and the right border frame define a border frame having a square ring structure. A material of the metal middle plate <NUM> includes, but is not limited to, an aluminum plate, aluminum alloy, stainless steel, a steel-aluminum composite die-casting plate, titanium alloy, magnesium alloy, or the like. The border frame <NUM> may be a metal border frame, a ceramic border frame, or a glass border frame. When the border frame <NUM> is the metal border frame, a material of the metal border frame includes, but is not limited to, aluminum alloy, stainless steel, a steel-aluminum composite die-casting plate, titanium alloy, or the like. The metal middle plate <NUM> and the border frame <NUM> may be snap-fitted, welded, bonded, or integrally formed, or the metal middle plate <NUM> may be fixed and connected to the border frame <NUM> by injection molding.

The top border frame and the bottom border frame are arranged opposite to each other, and the left border frame and the right border frame are arranged opposite to each other. The top border frame is respectively connected to one end of the left border frame and one end of the right border frame by round corners, and the bottom border frame is respectively connected to an other end of the left border frame and an other end of the right border frame by round corners, to jointly form a round-cornered rectangular region. A ground plane of the rear housing is arranged in the round-cornered rectangular region and is respectively connected to the top border frame, the bottom border frame, the left border frame, and the right border frame. It may be understood that the ground plane of the rear housing may be the rear housing <NUM> of the mobile phone <NUM>.

The rear housing <NUM> may be a metal rear housing, a glass rear housing, a plastic rear housing, or a ceramic rear housing. In the embodiment of this application, a material of the rear housing <NUM> is not limited and is not limited to the above examples either.

It should be noted that, in some examples, the rear housing <NUM> of the mobile phone <NUM> may be connected to the border frame <NUM> to form a unibody (Unibody) rear housing. For example, the mobile phone <NUM> may include a display assembly <NUM>, a metal middle plate <NUM>, and a rear housing. The rear housing may be a unibody (Unibody) rear housing formed by the border frame <NUM> and the rear housing <NUM>. In this way, the circuit board <NUM> and the battery <NUM> are located in a space defined by the metal middle plate <NUM> and the rear housing.

It may be understood that the schematic structure in the embodiment of this application constitutes no specific limitation on the mobile phone <NUM>. In some other embodiments of this application, the mobile phone <NUM> may include more or fewer components than those shown in the figure, or some components may be combined, or some components may be split, or components are arranged in different manners. The components shown in the figure may be implemented by hardware, software, or a combination of software and hardware.

In the embodiment of this application, as shown in <FIG>, the optical recognition assembly <NUM> may include a lens <NUM> and a sensor <NUM>. The lens <NUM> is located between the display assembly <NUM> and the sensor <NUM>, and a fingerprint detection region <NUM> is arranged on the display assembly <NUM> (refer to <FIG> and <FIG>). Specifically, the fingerprint detection region <NUM> is located on a side of the display assembly <NUM> attached to a finger <NUM>. In addition, a projection region of the fingerprint detection region <NUM> on the middle frame <NUM> may at least partially coincide with a projection region of the lens <NUM> on the middle frame <NUM>, so as to ensure accuracy of a fingerprint in the fingerprint detection region <NUM> by the optical recognition assembly <NUM>.

When the finger <NUM> touches the fingerprint detection region <NUM>, a light-emitting unit (that is to say, a light-emitting layer <NUM>) of the display assembly <NUM> emits light, and the emitted light is emitted to the finger <NUM> by a transparent electrode of the display assembly <NUM>. A surface of the finger <NUM> has a microscopic texture structure. After the light is emitted to the finger <NUM>, a peak and a trough of the microscopic texture structure have different light intensities of reflection. After the light passes through the transparent electrode again, an optical image of the microscopic surface of the fingerprint is formed, and then fingerprint information is acquired for recognition by capture and calculation of the optical sensor <NUM>.

<FIG> shows a physical image presented by the light-emitting unit in the display assembly <NUM> under the lens <NUM>, and the physical image has a moiré pattern consisting of alternating dark and bright regions in a regular shape and has a relatively high spatial frequency. Specifically, the physical image has a plurality of bright regions <NUM>. Gaps between the plurality of bright regions <NUM> form a dark region <NUM>. It should be noted that the spatial frequency is a number of cycles in which bright and dark fringes repeatedly occur or a number of repetitions of sinusoidal shading changes within a unit viewing angle. In addition, <FIG> shows photosensitive units of the sensor <NUM>, and the arrangement of the photosensitive units also has the same shape as that in <FIG>, but the spatial frequency is slightly different from each other. The spatial frequency of the pattern in <FIG> is slightly less than the spatial frequency of the pattern in <FIG>. In <FIG>, when the light-emitting unit is imaged on the sensor <NUM>, since the sensor has photosensitive units arranged at intervals, part of image information is not collected, and overlapping images form a mode of enhancement and weakening in spatial distribution, thereby generating stripes (see bright stripes <NUM> and dark stripes <NUM> in <FIG>) consisting of alternating dark and bright regions, that is, moiré patterns.

It should be noted that when the imaging pattern in <FIG> and the imaging pattern in <FIG> are arranged in a same direction, vertical stripes are formed, and when the two imaging patterns are at a certain angle, diagonal stripes are formed. In addition, due to optical diffuse reflection on the fingerprint surface, a direction of each light path is not consistent, and therefore in practical application scenarios, irregular stripes are generally presented. Besides, a different image effect may be seen from a different viewing angle. For example, as shown in <FIG>, the moiré patterns having a clear boundary between the bright region and the dark region are formed, and the image is obviously "grainy". Alternatively, as shown in <FIG>, the fingerprint image having the moiré patterns is presented with unevenly distributed bright spots, and a distorted image <NUM> is produced in the image. <FIG> shows a distorted fingerprint image obtained by the optical recognition assembly <NUM> by optical calculation, and the optical recognition assembly <NUM> cannot accurately recognize a user fingerprint forming the distorted image <NUM>.

Since the optical recognition assembly <NUM> draws the fingerprint image by calculating the feature of brightness and darkness of the image, when the moiré image is similar to the fingerprint image, the image of the fingerprint itself cannot be recognized. As a result, the user fingerprint is difficult to be recognized, which reduces the accuracy of the fingerprint recognition, thereby reducing use performance and user experience.

Based on this, according to the display assembly <NUM> provided in the embodiments of this application, in the display assembly <NUM>, the light scattering layer <NUM> is arranged between the base layer <NUM> and the light source layer <NUM>, the opening <NUM> is provided on the light scattering layer <NUM>, the projection region of the light-emitting layer <NUM> on the light scattering layer <NUM> covers the opening <NUM>, and the projection region of the connection region <NUM> between the non-light-emitting layer <NUM> and the light-emitting layer <NUM> on the light scattering layer <NUM> is located outside the opening <NUM>. Based on the principle of light scattering, when light on a side of the light-emitting layer <NUM> toward the base layer <NUM> is emitted from an edge of the opening <NUM>, diffuse reflection occurs on the light scattering layer <NUM> to form divergent light in different directions. In this way, the light scattering layer <NUM> blurs the scattered light, and the image collected by the optical recognition assembly <NUM> is not obviously "grainy" and is presented with evenly distributed bright spots. Therefore, optical space interference is avoided, and occurrence of an optical fingerprint moiré pattern is effectively reduced or avoided, thereby enhancing the accuracy of fingerprint recognition and greatly improving use performance and user experience.

The specific structure of the display assembly <NUM> and the method for manufacturing a display assembly <NUM> are described in detail below with reference to the accompanying drawings.

As shown in <FIG>, the display assembly <NUM> provided in the embodiment of this application may include at least a base layer <NUM>, a light source layer <NUM>, and a light scattering layer <NUM> located between the base layer <NUM> and the light source layer <NUM>. The light source layer <NUM> may include a light-emitting layer <NUM> and non-light-emitting layers <NUM> on two sides of the light-emitting layer <NUM>. Specifically, in <FIG>, black arrows show light exit directions of the light source layer <NUM>.

In the embodiment of this application, an opening <NUM> may be provided on the light scattering layer <NUM>, a projection region of the light-emitting layer <NUM> on the light scattering layer <NUM> covers the opening <NUM>, and a projection region of a connection region <NUM> between the non-light-emitting layer <NUM> and the light-emitting layer <NUM> on the light scattering layer <NUM> is located outside the opening <NUM>. Since the light scattering layer <NUM> can play the role of homogenizing light, when light on a side of the light-emitting layer <NUM> toward the base layer <NUM> is emitted from an edge of the opening <NUM>, diffuse reflection occurs on the light scattering layer <NUM> to form divergent light in different directions. In this way, the light scattering layer <NUM> blurs the scattered light, and a continuous image is formed on the non-light-emitting layer <NUM> of the display assembly <NUM>, thereby avoiding the spatial similarity between the light-emitting layer <NUM> of the display assembly <NUM> and the photosensitive units of the sensor <NUM>. The image collected by the optical recognition assembly <NUM> is not obviously "grainy" and is presented with evenly distributed bright spots. Therefore, optical space interference is avoided, and occurrence of an optical fingerprint moiré pattern is effectively reduced or avoided, thereby enhancing the accuracy of fingerprint recognition and greatly improving use performance and user experience.

It should be noted that, in the embodiment of this application, the projection region of the light-emitting layer <NUM> on the light scattering layer <NUM> may completely cover the opening <NUM>.

In the embodiment of this application, as shown in <FIG>, the display assembly <NUM> may further include a middle layer <NUM>. The middle layer <NUM> is located between the base layer <NUM> and the light source layer <NUM>. A part of the middle layer <NUM> is located between the light source layer <NUM> and the light scattering layer <NUM>, and an other part of the middle layer <NUM> is located in the opening <NUM>.

Specifically, the middle layer <NUM> may include at least one planarization layer. A part of the planarization layer is located between the light source layer <NUM> and the light scattering layer <NUM>, and an other part of the planarization layer is located in the opening <NUM>. The planarization layer can play a role in planarizing a surface of the light scattering layer <NUM>.

Further, in some embodiments, the middle layer <NUM> may include at least two planarization layers and at least one passivation layer. The passivation layer is located between two adjacent planarization layers. One of the at least two planarization layers is located between the light source layer <NUM> and the planarization layer, a part of the other of the at least two planarization layers is located between the passivation layer and the light scattering layer <NUM>, and an other part of the other of the at least two planarization layers is located in the opening <NUM>. The passivation layer can play the role in thermal insulation and blocking ion erosion.

For example, referring to <FIG>, the middle layer <NUM> may include a first planarization layer <NUM>, a second planarization layer <NUM>, and a passivation layer <NUM> between the first planarization layer <NUM> and the second planarization layer <NUM>. A part of the first planarization layer <NUM> is located between the passivation layer <NUM> and the light scattering layer <NUM>, an other part of the first planarization layer <NUM> is located in the opening <NUM>, and the second planarization layer <NUM> is located between the light source layer <NUM> and the passivation layer <NUM>.

The first planarization layer <NUM> can play a role in planarizing the surface of the light scattering layer <NUM>, and the second planarization layer <NUM> can play a role in planarizing a surface of the passivation layer <NUM>, thereby preventing uneven heights and poor flatness from causing adverse impact on the transistor <NUM>.

It should be noted that a material of the first planarization layer <NUM> and the second planarization layer <NUM> may be a resin material, and a material of the passivation layer <NUM> may be silicon dioxide. For example, the passivation layer <NUM> made of the silicon dioxide may be arranged on the first planarization layer <NUM> by evaporation, and the second planarization layer <NUM> made of the resin material may be arranged on the passivation layer <NUM> by coating.

In addition, in an optional implementation, at least one transistor <NUM> may be arranged in the second planarization layer <NUM>, and the transistor <NUM> is in contact with the passivation layer <NUM>.

Specifically, the transistor <NUM> may be a thin film transistor (Thin Film Transistor, TFT). The display assembly <NUM> having the TFT has advantages such as high responsivity, high brightness, high contrast, and the like, and has a better display effect.

As shown in <FIG>, the display assembly <NUM> may further include a packaging layer <NUM>. The light source layer <NUM> is located between the packaging layer <NUM> and the second planarization layer <NUM>. A material of the packaging layer <NUM> may be silicon nitride, or the like. The packaging layer <NUM> can protect the light source layer <NUM>, so as to prevent external conditions from affecting the light source layer <NUM>, thereby avoiding damaging the use performance of the display assembly <NUM>. It may be understood that, in some embodiments, a bottom surface of the non-light-emitting layer <NUM> may be flush with a bottom surface of the light-emitting layer <NUM>, a top surface of the non-light-emitting layer <NUM> may be higher than a top surface of the light-emitting layer <NUM>. An inclined portion <NUM> may be arranged on an end of the non-light-emitting layer <NUM> close to the light-emitting layer <NUM> (see <FIG>), and a thickness of the inclined portion <NUM> gradually decreases from an end away from the light-emitting layer <NUM> to an end close to the light-emitting layer <NUM>. In this way, an emission angle of the emitted light on a side of the light-emitting layer <NUM> toward the packaging layer <NUM> can be increased, thereby increasing an emission range of the emitted light.

In the embodiment of this application, a thickness of the light scattering layer <NUM> ranges from <NUM> to <NUM>. For example, the thickness of the light scattering layer <NUM> may be <NUM>, <NUM>, or <NUM>, which is not limited in the embodiment of this application and is not limited to the above examples either. In this way, a thickness of the display assembly <NUM> can be reduced to a certain extent, which is beneficial to realize lightness and thinness of the display assembly <NUM> and further beneficial to realize lightness and thinness of the mobile phone <NUM> having the display assembly <NUM>.

Specifically, in the embodiment of this application, a specific forming manner of the light scattering layer <NUM> includes but is not limited to the following two possible implementations.

A possible implementation is as follows. As shown in <FIG> and <FIG>, the light scattering layer <NUM> may include a transparent substrate <NUM> and light scattering particles <NUM> distributed in the transparent substrate <NUM>. A refractive index of the light scattering particles <NUM> is greater than a refractive index of the transparent substrate <NUM>. In this way, the transparent substrate <NUM> coated by the light scattering particles <NUM> forms the light scattering layer <NUM>, so as to scatter the emitted light.

It should be noted that the transparent substrate <NUM> may be made of a colloidal material such as photoresist and a resin material. For example, the transparent substrate <NUM> may be made of acrylic resin, polyimide resin, polyamide resin, or the like.

The light scattering particles <NUM> may be acrylic particles, Si particles, and made of organic materials such as poly(<NUM>,<NUM>-ethylenedioxythiophene) (PEDOT), <NUM>,<NUM>'-bis[N-(<NUM>-methylphenyl)-N-phenylamino]biphenyl (TPD), <NUM>,<NUM>',<NUM>"-tris(N-carbazolyl)-triphenylamine (TCTA), and the like. Alternatively, in some other embodiments, the light scattering particles <NUM> may also be made of inorganic materials. The materials used by the transparent substrate <NUM> and the light scattering particles <NUM> are not limited in the embodiment of this application, and are not limited to the above examples either, as long as the transparent substrate and the light scattering particles have high refractive indexes and are not easily decomposed.

In the embodiment of this application, diameters of the light scattering particles <NUM> may range from <NUM> to <NUM>. The nano-scale light scattering particles <NUM> may be manufactured by using a method such as physical crushing or chemical deposition, and the light scattering particles <NUM> may be microscopic particles having a circular cross section or any shape. The nano-scale light scattering particles <NUM> are distributed in the transparent substrate <NUM>, which can improve uniformity of the light scattering layer <NUM>, thereby enhancing a scattering effect of the light scattering layer <NUM>.

For example, diameters of the light scattering particles <NUM> may be <NUM>, <NUM>, <NUM>, and the like, which is not limited in the embodiment of this application and is not limited to the above examples either.

In addition, the light scattering particles <NUM> may be randomly distributed in the transparent substrate <NUM>, and a doping proportion of the light scattering particles <NUM> in the transparent substrate <NUM> may range from <NUM>% to <NUM>%. It should be noted herein that the numerical value and the numerical range involved in this application are approximate values, and there may be an error within a certain range due to impact of the manufacturing process. The error may be considered negligible by those skilled in the art.

Another possible implementation is as follows. As shown in <FIG>, the light scattering layer <NUM> may include at least one set of a first light scattering layer <NUM> and a second light scattering layer <NUM> that are stacked. As shown in <FIG>, a plurality of first protruding portions <NUM> may be provided on a side of the first light scattering layer <NUM> close to the second light scattering layer <NUM>, and a first groove <NUM> is formed between two adjacent first protruding portions <NUM>. As shown in <FIG>, a plurality of second protruding portions <NUM> matching the first grooves <NUM> may be provided on a side of the second light scattering layer <NUM> close to the first light scattering layer <NUM>, a second groove <NUM> is formed between two adjacent second protruding portions <NUM>, and the second grooves <NUM> match the first protruding portions <NUM>. A refractive index of the first light scattering layer <NUM> is different from a refractive index of the second light scattering layer <NUM>.

In this way, a level structure having alternating high and low refractive indexes is formed by the first light scattering layer <NUM> and the second light scattering layer <NUM>. The light can be refracted on surfaces of concave-convex structures of the first light scattering layer <NUM> and the second light scattering layer <NUM>, thereby changing a propagation direction of the light and realizing the effect of light scattering. The refractive index of the first light scattering layer <NUM> greater than the refractive index of the second light scattering layer <NUM> is used as an example. As shown by the black arrows in <FIG>, the light first passes through the first light scattering layer <NUM> during irradiation, and then is refracted on the surface of the concave-convex structure of the first light scattering layer <NUM>, thereby changing the propagation direction of the light and realizing the effect of light scattering.

In an optional implementation, at least part of the plurality of first protruding portions <NUM> may have different shapes or sizes (see <FIG>), and at least part of the plurality of second protruding portions <NUM> may have different shapes or sizes. In this way, the surfaces of the concave-convex structures of the first light scattering layer <NUM> and the second light scattering layer <NUM> are in irregular shapes, which can further enhance the scattering effect of the light scattering layer <NUM>. In addition, it should be noted that the cross-sectional shape of the first protruding portion <NUM> and the first groove <NUM> may be a rectangle shown in <FIG>, or a triangle shown in <FIG>, which is not limited in the embodiment of this application and is not limited to the above examples either.

In the embodiment of this application, as shown in <FIG>, the light source layer <NUM> may include a plurality of light-emitting layers <NUM> and a plurality of non-light-emitting layers <NUM>. The light-emitting layers <NUM> and the non-light-emitting layers <NUM> are arranged at intervals. Specifically, the light scattering layer <NUM> may include a plurality of scattering sub-layers <NUM>. As shown in <FIG>, projection regions of the plurality of scattering sub-layers <NUM> on the light source layer <NUM> may completely cover the plurality of non-light-emitting layers <NUM>, and may cover a part of the plurality of light-emitting layers <NUM> adjacent to the plurality of non-light-emitting layers <NUM>.

It is easy to understand that the non-light-emitting layer <NUM> may be a pixel defining layer, and a material of the pixel defining layer may be a resin material.

Still referring to <FIG>, in the embodiment of this application, the light-emitting layers <NUM> and the non-light-emitting layers <NUM> may be arranged at intervals in a first direction L1. A width of a projection region of each of the scattering sub-layers <NUM> on each of the light-emitting layers <NUM> in the first direction L1 is greater than one fifth and less than four fifths of a width of each of the light-emitting layers <NUM> in the first direction L1.

Specifically, as shown in <FIG>, the width of each of the light-emitting layers <NUM> in the first direction L1 is a first width W1, the width of the projection region of each of the scattering sub-layers <NUM> on each of the light-emitting layers <NUM> in the first direction L1 is a second width W2, and the width of a region of each of the light-emitting layers <NUM> not covered by the scattering sub-layer <NUM> in the first direction L1 is a third width W3. It is easy to understand that W1 = W2 + W3, that is to say, <NUM>/5W1 < W2 < <NUM>/5W1, and <NUM>/5W1 < W3 < <NUM>/5W1. That is to say, the third width W3 of the region of each of the light-emitting layers <NUM> not covered by the scattering sub-layer <NUM> in the first direction L1 is greater than one fifth and less than four fifths of the first width W1 of each of the light-emitting layers <NUM> in the first direction L1.

The light-emitting layers <NUM> and the non-light-emitting layers <NUM> may be arranged at intervals in a second direction L2. The width of the projection region of each of the scattering sub-layers <NUM> on each of the light-emitting layers <NUM> in the second direction L2 is greater than one fifth and less than four fifths of the width of each of the light-emitting layers <NUM> in the second direction L2. The second direction L2 is perpendicular to the first direction L1.

Specifically, as shown in <FIG>, the width of each of the light-emitting layers <NUM> in the second direction L2 is a fourth width W4, the width of the projection region of each of the scattering sub-layers <NUM> on each of the light-emitting layers <NUM> in the second direction L2 is a fifth width W5, and a width of a region of each of the light-emitting layers <NUM> not covered by the scattering sub-layer <NUM> in the second direction L2 is a sixth width W6. It is easy to understand that W4 = W5 + W6, that is to say, <NUM>/5W4 < W5 < <NUM>/5W4, and <NUM>/5W4 < W6 < <NUM>/5W4. That is to say, the sixth width W6 of the region of each of the light-emitting layers <NUM> not covered by the scattering sub-layer <NUM> in the second direction L2 is greater than one fifth and less than four fifths of the fourth width W4 of each of the light-emitting layers <NUM> in the second direction L2.

In an optional implementation, the second width W2 of the projection region of each of the scattering sub-layers <NUM> on each of the light-emitting layers <NUM> in the first direction L1 and the fifth width W5 of the projection region of each of the scattering sub-layers <NUM> on each of the light-emitting layers <NUM> in the second direction L2 may be minimized. In this way, the impact on fingerprint imaging of the finger <NUM> is relatively small, and the fingerprint image collected by the optical recognition assembly <NUM> and fingerprint recognition features are not adversely affected. <FIG> shows a scattering principle of the light scattering layer <NUM>. When light is emitted from an edge of the light-emitting layer <NUM>, diffuse reflection occurs at the light scattering layer <NUM> (the scattering sub-layer <NUM>), and divergent light in different directions is formed. Therefore, a light pattern at the non-light-emitting layer <NUM> is blurred. Viewed from a side of the light-emitting layer <NUM> facing the base layer <NUM>, the emitted light tends to be continuous, thereby destroying the spatial high-frequency features of the imaging regularity of the light-emitting layer <NUM> in the optical recognition assembly <NUM>. As shown in <FIG>, the image collected by the optical recognition assembly <NUM> is no longer obviously "grainy" compared with those in <FIG>, and is presented with evenly distributed bright spots, thereby avoiding optical space interference and effectively reducing generation of optical moiré patterns.

In addition, since the light scattering layer <NUM> is arranged on the side of the light-emitting layer <NUM> facing the base layer <NUM>, the light scattering layer <NUM> will not have adverse impact on a front light exit display effect of the display assembly <NUM>.

In addition, it may be understood that the region where the light scattering layer <NUM> is arranged in the display assembly <NUM> corresponds to the fingerprint detection region <NUM>, so as to realize the function of enhancing the fingerprint detection accuracy.

In addition, an embodiment of this application further provides a method for manufacturing a display assembly <NUM>. As shown in <FIG>, the method may include at least the following steps. S101: Providing a base layer <NUM>.

In the embodiment of this application, a material of the base layer <NUM> may be a glass base or a flexible material base. For example, the flexible material may be polyimide (Polyimide, PI). The polyimide has an excellent mechanical property, a dielectric property, a thermal expansion property, and a stability property.

S102: Forming a light scattering layer <NUM> on the base layer <NUM>.

Specifically, as shown in <FIG>, the light scattering layer <NUM> is formed on the base layer <NUM>. The light scattering layer <NUM> is a transparent substrate <NUM> coated by light scattering particles <NUM> by way of example. The transparent substrate <NUM> containing the light scattering particles <NUM> may be coated on the base layer <NUM>, and the light scattering layer <NUM> formed by the transparent substrate <NUM> coated by the light scattering particles <NUM> is cured by using a curing process.

S103: Providing an opening <NUM> on the light scattering layer <NUM>.

Specifically, as shown in <FIG>, the opening <NUM> may be provided on the light scattering layer <NUM> by using an etching process. It should be noted that a shape of the opening <NUM> may be any pattern, that is to say, the pattern required in an actual application scenario may be obtained by using the etching process.

S104: Forming a light source layer <NUM> above the light scattering layer <NUM>.

The light source layer <NUM> may include a light-emitting layer <NUM> and non-light-emitting layers <NUM> located on two sides of the light-emitting layer <NUM>. A projection region of the light-emitting layer <NUM> on the light scattering layer <NUM> covers the opening <NUM>, and a projection region of a connection region <NUM> between the non-light-emitting layer <NUM> and the light-emitting layer <NUM> on the light scattering layer <NUM> is located outside the opening <NUM>.

Based on the principle of light scattering, when light on a side of the light-emitting layer <NUM> toward the base layer <NUM> is emitted from an edge of the opening <NUM>, diffuse reflection occurs on the light scattering layer <NUM> to form divergent light in different directions. In this way, the light scattering layer <NUM> blurs the scattered light. The image collected by the optical recognition assembly <NUM> is not obviously "grainy" and is presented with evenly distributed bright spots. Therefore, optical space interference is avoided, and occurrence of an optical fingerprint moiré pattern is effectively reduced or avoided, thereby enhancing the accuracy of fingerprint recognition and greatly improving use performance and user experience.

In the embodiment of this application, as shown in <FIG>, S104 may specifically include the following steps.

S1041: Forming a middle layer <NUM> on the light scattering layer <NUM>.

For example, as shown in <FIG>, a first planarization layer <NUM> may be formed on the light scattering layer <NUM>, and a passivation layer <NUM> is formed on the first planarization layer <NUM>. The first planarization layer <NUM> can play a role in planarizing a surface of the light scattering layer <NUM>, and the passivation layer can play the role in thermal insulation and blocking ion erosion.

In addition, a second planarization layer <NUM> may be further formed on the passivation layer <NUM>, and at least one transistor <NUM> is arranged in the second planarization layer <NUM>. The transistor <NUM> is in contact with the passivation layer <NUM>.

The transistor <NUM> may be a thin film transistor (Thin Film Transistor, TFT). The display assembly <NUM> having the TFT has advantages such as high responsivity, high brightness, high contrast, and the like, and has a better display effect.

S1042: Forming a light source layer <NUM> on the middle layer <NUM>.

A part of the middle layer <NUM> is located between the light source layer <NUM> and the light scattering layer <NUM>, and an other part of the middle layer <NUM> is located in opening <NUM>.

It should be noted that, in the embodiment of this application, the forming a light scattering layer <NUM> on the base layer <NUM> may specifically include but is not limited to the following two possible implementations.

A possible implementation is as follows. As shown in <FIG>, S102 may specifically include the following steps.

S1021a: Providing light scattering particles <NUM> and a transparent substrate <NUM>.

The light scattering particles <NUM> may be acrylic particles, Si particles, and made of organic materials such as poly(<NUM>,<NUM>-ethylenedioxythiophene) (PEDOT), <NUM>,<NUM>'-bis[N-(<NUM>-methylphenyl)-N-phenylamino]biphenyl (TPD), <NUM>,<NUM>',<NUM>"-tris(N-carbazolyl)-triphenylamine (TCTA), and the like. The materials used by the transparent substrate <NUM> and the light scattering particles <NUM> are not limited in the embodiment of this application, and are not limited to the above examples either. S1022a: Doping the light scattering particles <NUM> in the transparent substrate <NUM> to form the light scattering layer <NUM>.

It should be noted that a doping proportion of the light scattering particles <NUM> in the transparent substrate <NUM> may range from <NUM>% to <NUM>%.

S1023a: Coating the light scattering layer <NUM> on the base layer <NUM>.

A refractive index of the light scattering particles <NUM> is greater than a refractive index of the transparent substrate <NUM>. In this way, the transparent substrate <NUM> coated by the light scattering particles <NUM> forms the light scattering layer <NUM>, so as to scatter the emitted light.

Another possible implementation is as follows. As shown in <FIG>, S102 may specifically include the following steps.

S1021b: Providing a first light scattering layer <NUM>.

Specifically, as shown in <FIG>, the first light scattering layer <NUM> is formed on the base layer <NUM>.

S1022b: Arranging a plurality of first protruding portions <NUM> on a first surface <NUM> of the first light scattering layer <NUM>, where a first groove <NUM> is provided between two adjacent first protruding portions <NUM>.

Specifically, as shown in <FIG> and <FIG>, a plurality of first protruding portions <NUM> are provided on the first surface <NUM> of the first light scattering layer <NUM>, so that a first groove <NUM> is formed between two adjacent first protruding portions <NUM>. It should be noted that the first protruding portions <NUM> and the first grooves <NUM> may be formed on the first light scattering layer <NUM> by using a nanoindentation process.

S1023b: Forming a second light scattering layer <NUM> on the first surface <NUM> having the plurality of first protruding portions <NUM> arranged thereon, so that a plurality of second protruding portions <NUM> matching the first grooves <NUM> and a plurality of second grooves <NUM> matching the first protruding portions <NUM> are formed on a side of the second light scattering layer <NUM> close to the first surface <NUM>.

Specifically, as shown in <FIG>, the second light scattering layer <NUM> is formed on the first light scattering layer <NUM>. Since a plurality of first protruding portions <NUM> and a plurality of first grooves <NUM> are provided on the first surface <NUM> of the first light scattering layer <NUM>, when the second light scattering layer <NUM> is arranged on the first surface <NUM> of the first light scattering layer <NUM>, a plurality of second protruding portions <NUM> matching the first grooves <NUM> and a plurality of second grooves <NUM> matching the first protruding portions <NUM> are formed on the side of the second light scattering layer <NUM> close to the first surface <NUM> (refer to <FIG> and <FIG>).

It should be noted that, in the embodiment of this application, a refractive index of the first light scattering layer <NUM> is different from a refractive index of the second light scattering layer <NUM>.

In this way, a level structure having alternating high and low refractive indexes is formed by the first light scattering layer <NUM> and the second light scattering layer <NUM>. The light can be refracted on surfaces of concave-convex structures of the first light scattering layer <NUM> and the second light scattering layer <NUM>, thereby changing a propagation direction of the light and realizing the effect of light scattering.

In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and defined, the terms "mount", "connected", and "connection" should be understood in a broad sense, for example, fixed connection, indirectly connected by a medium, or internal communication between two elements, or an interaction relationship between the two elements. The specific meanings of the above terms in the embodiments of this application may be understood according to specific circumstances for those of ordinary skill in the art.

The apparatus or element indicated or implied in the embodiments of this application is required to have a specific orientation, be constructed and operate in the specific orientation, and therefore should not be construed as a limitation on the embodiments of this application. In the description of the embodiments of this application, unless otherwise accurately specifically specified, "a plurality of" means two or more than two.

Claim 1:
A display assembly (<NUM>), applicable to an electronic device having a fingerprint recognition function, characterized by comprising at least:
a base layer (<NUM>), a light source layer (<NUM>), and a light scattering layer (<NUM>) located between the base layer (<NUM>) and the light source layer (<NUM>), wherein
the light source layer (<NUM>) comprises a light-emitting layer (<NUM>) and non-light-emitting layers (<NUM>) located on two sides of the light-emitting layer (<NUM>); characterized in that
the non-light-emitting layers (<NUM>) and the light-emitting layer (<NUM>) are connected to each other in an inclined portion (<NUM>) which is arranged on an end of the non-light-emitting layer (<NUM>) close to the light-emitting layer (<NUM>),
an opening (<NUM>) is provided on the light scattering layer (<NUM>),
a projection region of the light-emitting layer (<NUM>) on the light scattering layer (<NUM>) covers the opening (<NUM>),
a projection region of the inclined portion (<NUM>) on the light scattering layer (<NUM>) is located outside the opening (<NUM>), and
a thickness of the inclined portion (<NUM>) gradually decreases from an end away from the light-emitting layer (<NUM>) to an end close to the light-emitting layer (<NUM>).