Display module and display device

Abstract

A display module and a display device. The display module comprises: a substrate; and a pixel definition layer, a first structure, a light-emitting device, an encapsulation layer and a reflective structure, which are sequentially stacked on one side of the substrate, wherein the pixel definition layer is provided with a first opening and a second opening, the orthographic projection of the first structure on the substrate is located between the orthographic projections of the first opening and the second opening on the substrate, and the distance between the orthographic projections of the first structure and the first opening on the substrate is less than the distance between the orthographic projections of the first structure and the second opening on the substrate; the light-emitting device is located in the first opening, and the light-emitting device comprises a first electrode, a light-emitting layer and a second electrode, which are sequentially stacked in a direction away from the substrate, with the second electrode further extending to cover at least the first structure and the pixel definition layer; and the orthographic projection of the reflective structure on the substrate is located between the orthographic projections of the first structure and the second opening on the substrate, and the orthographic projection of the reflective structure does not overlap with the orthographic projections of the second opening and the first structure on the substrate.

Description

Display modules and display devices Technical Field

[0001] This disclosure pertains to the field of display technology, specifically relating to a display module and a display device. Background Technology

[0002] OLED (Organic Light-Emitting Diode) displays have attracted widespread attention due to their advantages such as self-illumination, low power consumption, thinness, flexibility, vibrant colors, high contrast, and fast response speed. Summary of the Invention

[0003] In a first aspect, embodiments of this disclosure provide a display module, comprising: a substrate;

[0004] A pixel defining layer, a first structure, a light-emitting device, an encapsulation layer, and a reflective structure are sequentially stacked on one side of the substrate;

[0005] The pixel defining layer has a first opening and a second opening, and the orthographic projections of the first opening and the second opening on the substrate do not overlap.

[0006] The orthographic projection of the first structure on the substrate is located between the orthographic projections of the first opening and the second opening on the substrate, and the distance between the orthographic projections of the first structure and the first opening on the substrate is less than the distance between the orthographic projections of the first structure and the second opening on the substrate.

[0007] The light-emitting device is located in the first opening, and the light-emitting device includes a first electrode, a light-emitting layer and a second electrode stacked sequentially in a direction away from the substrate, and the second electrode extends to at least cover the first structure and the pixel defining layer;

[0008] The orthographic projection of the reflective structure on the substrate is located between the orthographic projections of the first structure and the second opening on the substrate, and the orthographic projections of the reflective structure, the second opening, and the first structure on the substrate do not overlap.

[0009] In some embodiments, a first light-transmitting layer and a second light-transmitting layer are further included, which are stacked sequentially on the side of the reflective structure away from the substrate;

[0010] The refractive index of the first light-transmitting layer is less than the refractive index of the second light-transmitting layer;

[0011] The first light-transmitting layer has a first hole, a second hole, and a third hole on the side opposite to the substrate, and the orthographic projections of the first hole, the second hole, and the third hole on the substrate do not overlap.

[0012] The orthographic projection of the first hole on the substrate overlaps the orthographic projection of the first opening on the substrate;

[0013] The orthographic projection of the second hole on the substrate is located within the orthographic projection of the second opening on the substrate;

[0014] The orthographic projection of the third hole on the substrate is located between the orthographic projections of the first hole and the second hole on the substrate, and the orthographic projection of the third hole on the substrate is located between the orthographic projections of the first structure and the reflective structure on the substrate;

[0015] The orthogonal projection of the first light-transmitting layer onto the substrate at least covers the orthogonal projection of the reflective structure onto the substrate;

[0016] The orthogonal projection of the second light-transmitting layer on the substrate at least covers the orthogonal projection of the third hole on the substrate.

[0017] In some embodiments, the number of the first openings is multiple.

[0018] The orthographic projection of the second opening on the substrate is located at the midpoint of the distance between the orthographic projections of two adjacent first openings on the substrate.

[0019] At least one of the first structures is provided between adjacent first openings and second openings;

[0020] The number of the first holes is multiple.

[0021] The orthographic projection of the second hole on the substrate is located at the midpoint of the distance between the orthographic projections of two adjacent first holes on the substrate;

[0022] At least one third hole is provided between adjacent first holes and second holes.

[0023] In some embodiments, the first hole includes a through hole or a blind hole;

[0024] The second hole may be a through hole or a blind hole;

[0025] The third hole may be a through hole or a blind hole.

[0026] In some embodiments, the height of the first structure along the direction away from the substrate ranges from 0.5 to 1.5 μm.

[0027] The cross-sectional shape of the first structure perpendicular to the substrate includes a trapezoid.

[0028] The base angles of the trapezoid range from 40° to 65°.

[0029] The width of the bottom edge of the trapezoid on the side furthest from the substrate ranges from 0.5 to 2 μm.

[0030] In some embodiments, the aperture size of the third hole ranges from 3 to 5 μm.

[0031] The cross-sectional shape of the third hole perpendicular to the substrate includes an inverted trapezoid.

[0032] The slope angle of the sidewall of the third hole ranges from 55° to 85°.

[0033] In some embodiments, a black matrix and a color resist layer are further included, located between the first light-transmitting layer and the second light-transmitting layer.

[0034] The orthographic projection of the second light-transmitting layer onto the substrate covers the substrate;

[0035] The color resist layer is located on the side of the black matrix that is away from the substrate, or the black matrix is ​​located on the side of the color resist layer that is away from the substrate.

[0036] The orthographic projection of the color resist layer on the substrate covers the orthographic projection of the first hole on the substrate, and the orthographic projections of the color resist layer, the second hole, and the third hole on the substrate do not overlap;

[0037] The black matrix does not overlap with the orthographic projections of the first hole, the second hole, and the third hole on the substrate.

[0038] In some embodiments, a black matrix and a flattening layer are also included.

[0039] The second light-transmitting layer is reused as a color resist layer.

[0040] The planarization layer is located on the side of the first light-transmitting layer opposite to the substrate.

[0041] The black matrix and the color resist layer are located between the planarization layer and the first light-transmitting layer.

[0042] The color resist layer is located on the side of the black matrix that is away from the substrate, or the black matrix is ​​located on the side of the color resist layer that is away from the substrate.

[0043] The black matrix does not overlap with the orthographic projections of the first hole, the second hole, and the third hole on the substrate;

[0044] The orthographic projection of the color resist layer on the substrate also extends to cover the orthographic projection of the first hole on the substrate.

[0045] In some embodiments, a third light-transmitting layer is further included, located between the first light-transmitting layer and the color-blocking layer.

[0046] The orthographic projection of the third light-transmitting layer on the substrate is located within the orthographic projection of the first hole on the substrate, and the orthographic projection of the third light-transmitting layer on the substrate covers the orthographic projection of the first opening on the substrate.

[0047] The orthogonal projection of the color resist layer on the substrate overlaps the orthogonal projection of the third light-transmitting layer on the substrate;

[0048] The refractive index of the third light-transmitting layer is greater than that of the color resist layer.

[0049] In some embodiments, a color resist layer and a black matrix are further included, located on the side of the first light-transmitting layer opposite to the substrate.

[0050] The black matrix does not overlap with the orthographic projections of the first hole, the second hole, and the third hole on the substrate;

[0051] The second light-transmitting layer includes a first part and a second part.

[0052] The first portion is located between the first light-transmitting layer and the color resist layer, and the orthographic projection of the color resist layer on the substrate covers the orthographic projection of the first portion on the substrate.

[0053] The orthographic projection of the first portion and the color resist layer on the substrate is located within the orthographic projection of the first hole on the substrate, and the orthographic projection of the first portion on the substrate covers the orthographic projection of the first opening on the substrate;

[0054] The refractive index of the first part is greater than the refractive index of the color resist layer;

[0055] The second portion is located between the first light-transmitting layer and the black matrix, or the second portion is located on the side of the black matrix facing away from the substrate;

[0056] The orthographic projection of the second part on the substrate covers the orthographic projection of the third hole on the substrate.

[0057] In some embodiments, the second portion further extends to cover the sidewall of the second hole and the sidewall of the first hole.

[0058] In some embodiments, the orthographic projection of the second portion on the substrate further extends to cover the orthographic projection of the second hole on the substrate.

[0059] In some embodiments, the first light-transmitting layer is reused as a first color-blocking layer.

[0060] The second light-transmitting layer is reused as a planarization layer.

[0061] The display module further includes a second color resist layer and a third color resist layer, located between the first color resist layer and the planarization layer;

[0062] The orthographic projections of the first color resist layer, the second color resist layer, and the third color resist layer on the substrate respectively cover the orthographic projections of different first openings on the substrate;

[0063] The second color resist layer does not overlap with the orthographic projections of the second hole and the third hole on the substrate;

[0064] The third color resist layer does not overlap with the orthographic projection of the second hole and the third hole on the substrate;

[0065] The orthographic projections of the portions of the first color resist layer, the second color resist layer, and the third color resist layer located outside the first hole, the second hole, and the third hole on the substrate overlap.

[0066] In some embodiments, a third light-transmitting layer is further included, located between the encapsulation layer and the first light-transmitting layer.

[0067] The orthographic projection of the third light-transmitting layer on the substrate is located within the orthographic projection of the first hole on the substrate, and the orthographic projection of the third light-transmitting layer on the substrate covers the orthographic projection of the first opening on the substrate.

[0068] The refractive index of the third light-transmitting layer is greater than the refractive index of the first color resist layer;

[0069] The refractive index of the third light-transmitting layer is greater than the refractive index of the second color resist layer;

[0070] The refractive index of the third light-transmitting layer is greater than that of the third color-blocking layer.

[0071] In some embodiments, the distance between the orthographic projections of the first hole and the first opening on the substrate ranges from 0 to 2 μm.

[0072] In some embodiments, the distance between the orthographic projections of the first hole and the first opening on the substrate ranges from 5 to 8 μm.

[0073] In some embodiments, the cross-sectional shape of the first hole perpendicular to the substrate includes an inverted trapezoid.

[0074] The slope angle of the sidewall of the first hole ranges from 55° to 85°.

[0075] The cross-sectional shape of the second hole perpendicular to the substrate includes an inverted trapezoid.

[0076] The slope angle of the sidewall of the second hole ranges from 55° to 85°.

[0077] The aperture size of the second hole ranges from 3 to 5 μm.

[0078] This disclosure also provides a display device, which includes the above-described display module.

[0079] The display module provided in this disclosure provides an ambient light source that is incident on the display side of the display module and illuminates the second electrode covering the surface of the first structure. The light is then reflected by the second electrode to the reflective structure, which further reflects the light so that the reflected light can enter the second opening. This allows ambient light to pass through the second opening and illuminate the photosensitive surface of the photosensitive device. Compared with display modules in related technologies, this increases the amount of ambient light entering the photosensitive surface of the photosensitive device, ultimately improving the photosensitive device's ability to sense and recognize ambient light.

[0080] The display device provided in this embodiment improves the ability of the photosensitive device in the display device to sense and recognize ambient light by adopting the above-mentioned display module, and also improves the light emission efficiency of the display device while reducing the power consumption of the display device. Attached Figure Description

[0081] The accompanying drawings are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the embodiments of this disclosure to explain the disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the detailed description of exemplary embodiments with reference to the accompanying drawings, in which:

[0082] Figure 1a is a partial cross-sectional schematic diagram of an OLED display module using EIC technology in related technologies.

[0083] Figure 1b is a partial cross-sectional schematic diagram of an OLED display module using UBA technology in related technologies.

[0084] Figure 2 is a partial cross-sectional schematic diagram of a display module according to an embodiment of this disclosure.

[0085] Figure 3 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0086] Figure 4 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0087] Figure 5 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0088] Figure 6 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0089] Figure 7 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0090] Figure 8 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0091] Figure 9 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0092] Figure 10 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0093] Figure 11 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0094] Figure 12 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure.

[0095] Figure 13 is a partial cross-sectional schematic diagram of another display module in an embodiment of this disclosure. Detailed Implementation

[0096] To enable those skilled in the art to better understand the technical solutions of the embodiments of this disclosure, a display module and display device provided by the embodiments of this disclosure will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0097] Embodiments of this disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms and should not be construed as limited to the embodiments set forth in this disclosure. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of this disclosure.

[0098] This disclosure is not limited to the embodiments shown in the accompanying drawings, but includes modifications to the configuration based on the manufacturing process. Therefore, the areas illustrated in the drawings are schematic, and the shapes of the areas shown illustrate specific shapes of the areas, but are not intended to be limiting.

[0099] In related technologies, referring to Figure 1a, OLED display modules using EIC technology utilize the total internal reflection effect between a high-refractive-index colored resin (i.e., color resist layer 10) and a low-refractive-index TOC material film layer (i.e., protective layer 15) to improve the light emission efficiency of the OLED light-emitting device at the positive viewing angle.

[0100] Referring to Figure 1a, the display module includes a display substrate 13, with a touch layer 14, a protective layer 15, and a color filter layer sequentially stacked on the display side of the display substrate 13. The display substrate 13 includes light-emitting devices 4 and photosensitive devices (not shown), with the photosensitive devices located in the spaced areas between adjacent light-emitting devices 4. The light-emitting devices 4 emit light to realize the display function of the display panel; the photosensitive devices sense ambient light incident from the display side of the display panel and adjust the display brightness of the display panel according to the intensity of the ambient light to provide the user with a better visual experience. The color filter layer includes a color resist layer 10 and a black matrix 9; the protective layer 15 is used to protect the touch layer 14; the protective layer 15 has multiple light-emitting openings, with the color resist layer 10 located at least in the light-emitting openings, and the black matrix 9 located in the spaced areas between adjacent light-emitting openings. The positions of the light-emitting devices 4 and the color resist layer 10 correspond, and the light emitted by the light-emitting devices 4 passes through the color resist layer 10 before exiting, thereby improving the reflection of ambient light by the corresponding light-emitting opening area of ​​the display panel. The black matrix 9 has a light-transmitting opening (not shown in the figure). The light-transmitting opening corresponds to the position of the photosensitive device. Ambient light can shine through the light-transmitting opening onto the photosensitive surface of the photosensitive device, thereby enabling the photosensitive device to sense ambient light.

[0101] Referring to Figure 1b, the OLED display module using UBA technology utilizes the refraction between the protrusions of the high-refractive-index OC material (i.e., HOC layer 16) and the low-refractive-index planar layer (i.e., EOC layer 17) to improve the light emission efficiency of the OLED light-emitting device at the positive viewing angle.

[0102] Referring to Figure 1b, the black matrix 9 has multiple light-emitting openings. The HOC layer 16 is located in one of the light-emitting openings, and the EOC layer 17 is located on the side of the HOC layer 16 facing away from the display substrate 13, and the EOC layer 17 completely covers the display substrate 13. The color resist layer 10 is located on the side of the EOC layer 17 facing away from the display substrate 13.

[0103] Display modules employing EIC or UBA technologies offer increased brightness and reduced power consumption. However, a pressing issue remains: how to increase the amount of ambient light entering the photosensitive device to enhance its recognition capabilities.

[0104] To address the problems in the related technologies, in a first aspect, embodiments of this disclosure provide a display module, referring to Figures 2-13, comprising: a substrate 1; a pixel defining layer 2, a first structure 3, a light-emitting device 4, an encapsulation layer 5, and a reflective structure 6, sequentially stacked on one side of the substrate 1; the pixel defining layer 2 has a first opening 21 and a second opening 22, the orthographic projections of the first opening 21 and the second opening 22 on the substrate 1 do not overlap; the orthographic projection of the first structure 3 on the substrate 1 is located between the orthographic projections of the first opening 21 and the second opening 22 on the substrate 1, and the first structure 3 and the first opening 22... The distance between the orthographic projections of the first structure 3 and the second opening 22 on the substrate 1 is less than the distance between the orthographic projections of the first structure 3 and the second opening 22 on the substrate 1; the light-emitting device 4 is located in the first opening 21, and the light-emitting device 4 includes a first electrode 41, a light-emitting layer 42 and a second electrode 43 stacked sequentially in a direction away from the substrate 1, and the second electrode 43 extends to at least cover the first structure 3 and the pixel defining layer 2; the orthographic projection of the reflective structure 6 on the substrate 1 is located between the orthographic projections of the first structure 3 and the second opening 22 on the substrate 1, and the reflective structure 6 does not overlap with the orthographic projections of the second opening 22 and the first structure 3 on the substrate 1.

[0105] The substrate 1 includes a photosensitive device (not shown in the figure), with its photosensitive surface facing the side where the light-emitting device 4 is located. The pixel defining layer 2 is made of an opaque material, and the second opening 22 corresponds to the photosensitive surface of the photosensitive device. This means that ambient light can pass through the second opening 22 in the pixel defining layer 2 and onto the photosensitive surface of the photosensitive device, thus enabling the photosensitive device to sense ambient light. The light-emitting device 4 can be an OLED. The second electrode 43 is made of a partially transparent and conductive material, such as silver or indium tin oxide. The second electrode 43 exhibits semi-transmissive and semi-reflective properties to incident light.

[0106] In some embodiments, the first structure 3 and the pixel defining layer 2 are made of the same material, and the first structure 3 and the pixel defining layer 2 can be formed simultaneously by a halftone exposure process.

[0107] In some embodiments, the reflective structure 6 may be made of a metallic material and has good light reflection properties. Part of the reflective structure 6 may be reused as a touch layer to enable the touch functionality of the display module.

[0108] In this embodiment, ambient light incident from the display side of the display module illuminates the second electrode 43 covering the surface of the first structure 3 and is reflected by the second electrode 43 to the reflective structure 6. The reflective structure 6 further reflects the light so that the reflected light can enter the second opening 22, thereby allowing ambient light to pass through the second opening 22 and illuminate the photosensitive surface of the photosensitive device. Compared with the display module in the related technology, this increases the amount of ambient light entering the photosensitive surface of the photosensitive device, ultimately improving the photosensitive device's ability to sense and recognize ambient light.

[0109] In some embodiments, referring to Figures 2-13, the display module further includes a first light-transmitting layer 7 and a second light-transmitting layer 8, which are sequentially stacked on the side of the reflective structure 6 away from the substrate 1; the refractive index of the first light-transmitting layer 7 is less than the refractive index of the second light-transmitting layer 8; a first hole 71, a second hole 72 and a third hole 73 are provided on the side of the first light-transmitting layer 7 away from the substrate 1, and the orthographic projections of the first hole 71, the second hole 72 and the third hole 73 on the substrate 1 do not overlap; the orthographic projection of the first hole 71 on the substrate 1 covers the orthographic projection of the first opening 21 on the substrate 1; The orthographic projection of the second hole 72 on the substrate 1 is located within the orthographic projection of the second opening 22 on the substrate 1; the orthographic projection of the third hole 73 on the substrate 1 is located between the orthographic projections of the first hole 71 and the second hole 72 on the substrate 1, and the orthographic projection of the third hole 73 on the substrate 1 is located between the orthographic projections of the first structure 3 and the reflective structure 6 on the substrate 1; the orthographic projection of the first light-transmitting layer 7 on the substrate 1 at least covers the orthographic projection of the reflective structure 6 on the substrate 1; the orthographic projection of the second light-transmitting layer 8 on the substrate 1 at least covers the orthographic projection of the third hole 73 on the substrate 1.

[0110] The first light-transmitting layer 7 and the second light-transmitting layer 8 are both made of light-transmitting organic compound materials, such as organic resin materials. The first light-transmitting layer 7 can cover and protect the reflective structure 6, preventing external moisture from corroding the reflective structure 6. Since the refractive index of the first light-transmitting layer 7 is less than that of the second light-transmitting layer 8, at the position of the third hole 73, when ambient light is incident on the contact interface between the second light-transmitting layer 8 and the first light-transmitting layer 7, by adjusting the refractive indices of the second light-transmitting layer 8 and the first light-transmitting layer 7, the incident ambient light can undergo total internal reflection at the contact interface, thereby increasing the amount of incident ambient light. The light that undergoes total internal reflection will be incident on the second electrode 43 covering the surface of the first structure 3, and reflected by the second electrode 43 to the reflective structure 6. The reflective structure 6 further reflects the light, allowing the reflected light to enter the second opening 22, so that the ambient light from the outside passes through the second opening 22 and illuminates the photosensitive surface of the photosensitive device, thereby further increasing the amount of ambient light entering the photosensitive surface of the photosensitive device, and ultimately improving the photosensitive device's ability to sense and recognize ambient light.

[0111] In some embodiments, the refractive index of the first light-transmitting layer 7 is in the range of 1.45 to 1.5. The refractive index of the second light-transmitting layer 8 is in the range of 1.6 to 1.85.

[0112] In some embodiments, referring to Figures 2-13, there are multiple first openings 21, and the orthographic projection of a second opening 22 on the substrate 1 is located at the midpoint of the distance between the orthographic projections of two adjacent first openings 21 on the substrate 1; at least one first structure 3 is provided between adjacent first openings 21 and second openings 22; there are multiple first holes 71, and the orthographic projection of a second hole 72 on the substrate 1 is located at the midpoint of the distance between the orthographic projections of two adjacent first holes 71 on the substrate 1; at least one third hole 73 is provided between adjacent first holes 71 and second holes 72.

[0113] If the distance between the orthographic projections of adjacent first openings 21 and second openings 22 on the substrate 1 is long enough, multiple first structures 3 can be set within this distance. Similarly, if the distance between the orthographic projections of adjacent first holes 71 and second holes 72 on the substrate 1 is long enough, multiple third holes 73 can be set within this distance. Through the total internal reflection of incident ambient light by multiple third holes 73 between adjacent first openings 21 and second openings 22 and the reflection of incident ambient light by multiple first structures 3, a larger amount of incident ambient light can be reflected by the reflective structure 6 and then incident into the second opening 22, thereby further increasing the amount of ambient light entering the photosensitive surface of the photosensitive device, and further improving the sensing and recognition capability of the photosensitive device for external ambient light.

[0114] In some embodiments, referring to Figures 2-13, the first hole 71 includes a through hole or a blind hole; the second hole 72 includes a through hole or a blind hole; and the third hole 73 includes a through hole or a blind hole. Figures 2-13 only show structures where the first hole 71, the second hole 72, and the third hole 73 are all through holes; configurations where the first hole 71, the second hole 72, and the third hole 73 are all blind holes are not shown. Because the contact interface area between the second light-transmitting layer 8 and the first light-transmitting layer 7 is larger when the first hole 71, the second hole 72, and the third hole 73 are all through holes, this configuration can further increase the amount of ambient light entering the photosensitive surface of the photosensitive device compared to blind holes.

[0115] In some embodiments, referring to Figures 2-13, the height of the first structure 3 along the direction away from the substrate 1 ranges from 0.5 to 1.5 μm, and the cross-sectional shape of the first structure 3 perpendicular to the substrate 1 includes a trapezoid, with the base angle θ of the trapezoid ranging from 40° to 65°, and the width of the base side of the trapezoid away from the substrate 1 ranging from 0.5 to 2 μm. The second electrode 43, disposed on the side where the slope waist of the first structure 3 with a trapezoidal cross-section is located, can reflect the ambient light incident on it to the reflective structure 6 obliquely opposite it, and cause the reflective structure 6 to reflect this part of the ambient light into the second opening 22, thereby increasing the amount of ambient light entering the photosensitive surface of the photosensitive device.

[0116] In some embodiments, referring to Figures 2-13, the aperture size of the third hole 73 ranges from 3 to 5 μm, the cross-sectional shape of the third hole 73 perpendicular to the substrate 1 includes an inverted trapezoid, and the slope angle α of the sidewall of the third hole 73 ranges from 55° to 85°. This configuration allows ambient light irradiated onto the sidewall of the third hole 73 (i.e., the contact interface between the second light-transmitting layer 8 and the first light-transmitting layer 7) to undergo total internal reflection, thereby increasing the amount of ambient light incident on the display module through the third hole 73.

[0117] In some embodiments, referring to Figures 2 and 3, the display module further includes a black matrix 9 and a color resist layer 10, located between the first light-transmitting layer 7 and the second light-transmitting layer 8. The orthogonal projection of the second light-transmitting layer 8 onto the substrate 1 covers the substrate 1. The color resist layer 10 is located on the side of the black matrix 9 away from the substrate 1, or the black matrix 9 is located on the side of the color resist layer 10 away from the substrate 1. The orthogonal projection of the color resist layer 10 onto the substrate 1 covers the orthogonal projection of the first hole 71 onto the substrate 1, and the orthogonal projections of the color resist layer 10, the second hole 72, and the third hole 73 onto the substrate 1 do not overlap. The black matrix 9 does not overlap with the orthogonal projections of the first hole 71, the second hole 72, and the third hole 73 onto the substrate 1.

[0118] The orthographic projection of the black matrix 9 onto the substrate 1 lies within the orthographic projection of the first light-transmitting layer 7 onto the substrate 1. The refractive index of the color resist layer 10 ranges from 1.6 to 1.75; the thickness of the color resist layer 10 is not less than the total thickness of the first light-transmitting layer 7 and the black matrix 9; the width of the overlapping area of ​​the orthographic projections of the color resist layer 10 and the first light-transmitting layer 7 surrounding the first hole 71 onto the substrate 1 is greater than 0 μm and less than or equal to 5 μm; this arrangement can prevent light leakage from the light emitted by the light-emitting device 4 at the sidewalls around the first hole 71.

[0119] In this embodiment, referring to Figures 2 and 3, the surface of the second light-transmitting layer 8 facing away from the substrate 1 is flush. The second light-transmitting layer 8 also serves as a planarization layer 11 on the display side of the display module, making the display side surface of the display module flat. In this embodiment, the refractive index of the second light-transmitting layer 8 is in the range of 1.65-1.75.

[0120] In some embodiments, referring to Figures 4 and 5, unlike the schemes in Figures 2 and 3, the display module further includes a black matrix 9 and a planarization layer 11, the second light-transmitting layer 8 is reused as a color resist layer 10, the planarization layer 11 is located on the side of the first light-transmitting layer 7 facing away from the substrate 1, the black matrix 9 and the color resist layer 10 are located between the planarization layer 11 and the first light-transmitting layer 7, the color resist layer 10 is located on the side of the black matrix 9 facing away from the substrate 1, or the black matrix 9 is located on the side of the color resist layer 10 facing away from the substrate 1; the black matrix 9 does not overlap with the orthographic projections of the first hole 71, the second hole 72 and the third hole 73 on the substrate 1; the orthographic projection of the color resist layer on the substrate 1 also extends to cover the orthographic projection of the first hole 71 on the substrate 1.

[0121] In this embodiment, the planarization layer 11 makes the display side surface of the display module flat. There is no limitation on the refractive index of the planarization layer 11. The planarization layer 11 is made of a light-transmitting organic compound material, such as an organic resin material.

[0122] In some embodiments, referring to Figures 2-5, since the refractive index of the color resist layer 10 is greater than that of the first light-transmitting layer 7, at the position of the first hole 71, when the light emitted by the light-emitting device 4 is incident on the contact interface between the color resist layer 10 and the first light-transmitting layer 7, by adjusting the refractive indices of the color resist layer 10 and the first light-transmitting layer 7, the light incident on the contact interface can undergo total internal reflection, thereby converging the light emitted by the light-emitting device 4 and making it tend to be collimated and emitted, thereby improving the light emission efficiency of the light-emitting device 4 at the positive viewing angle; that is, the display module in this embodiment adopts EIC technology.

[0123] In some embodiments, referring to Figures 2-5, the distance between the orthographic projections of the first hole 71 and the first opening 21 on the substrate 1 ranges from 0 to 2 μm.

[0124] In some embodiments, referring to FIG6, based on the scheme in FIG2 or FIG3, the display module further includes a third light-transmitting layer 12, located between the first light-transmitting layer 7 and the color resist layer 10. The orthogonal projection of the third light-transmitting layer 12 on the substrate 1 is located within the orthogonal projection of the first hole 71 on the substrate 1, and the orthogonal projection of the third light-transmitting layer 12 on the substrate 1 covers the orthogonal projection of the first opening 21 on the substrate 1; the orthogonal projection of the color resist layer 10 on the substrate 1 covers the orthogonal projection of the third light-transmitting layer 12 on the substrate 1; the refractive index of the third light-transmitting layer 12 is greater than the refractive index of the color resist layer 10.

[0125] Since the refractive index of the third light-transmitting layer 12 is greater than that of the color resist layer 10, the light emitted by the light-emitting device 4 will be refracted when it passes through the contact interface between the third light-transmitting layer 12 and the color resist layer 10. By adjusting the refractive indices of the third light-transmitting layer 12 and the color resist layer 10, the light can be converged and tend to be collimated, thereby improving the light emission efficiency of the light-emitting device 4 at the positive viewing angle; that is, the display module in this embodiment adopts UBA technology.

[0126] In this embodiment, referring to Figure 6, the refractive index of the third light-transmitting layer 12 ranges from 1.75 to 1.85. The third light-transmitting layer 12 is made of a light-transmitting organic compound material, such as an organic resin. The cross-sectional shape of the third light-transmitting layer 12 perpendicular to the substrate 1 is trapezoidal, and the slope angle of the side of the third light-transmitting layer 12 ranges from 65° to 85°. The thickness of the third light-transmitting layer 12 ranges from 1.5 to 2.5 μm, and the distance between the orthographic projection boundary of the third light-transmitting layer 12 on the substrate 1 and the orthographic projection boundary of the first opening 21 on the substrate 1 ranges from 0 to 2 μm. In this embodiment, the refractive index of the color resist layer 10 ranges from 1.55 to 1.65, the thickness of the color resist layer 10 ranges from 2 to 4 μm, and the color resist layer 10 completely covers the third light-transmitting layer 12. Unlike the schemes in Figures 2 and 3, the refractive index of the second light-transmitting layer 8 in this embodiment ranges from 1.7 to 1.8.

[0127] In some embodiments, referring to Figures 7 and 8, unlike the embodiments described above, the display module further includes a color resist layer 10 and a black matrix 9, located on the side of the first light-transmitting layer 7 facing away from the substrate 1. The black matrix 9 does not overlap with the orthographic projections of the first hole 71, the second hole 72, and the third hole 73 on the substrate 1. The second light-transmitting layer 8 includes a first portion 81 and a second portion 82. The first portion 81 is located between the first light-transmitting layer 7 and the color resist layer 10. The orthographic projection of the color resist layer 10 on the substrate 1 covers the orthographic projection of the first portion 81 on the substrate 1. The orthographic projection of the first portion 81 and the color resist layer 10 on the substrate 1 is located within the orthographic projection of the first hole 71 on the substrate 1, and the orthographic projection of the first portion 81 on the substrate 1 covers the orthographic projection of the first opening 21 on the substrate 1; the refractive index of the first portion 81 is greater than the refractive index of the color resist layer 10; the second portion 82 is located between the first light-transmitting layer 7 and the black matrix 9, or the second portion 82 is located on the side of the black matrix 9 facing away from the substrate 1; the orthographic projection of the second portion 82 on the substrate 1 covers the orthographic projection of the third hole 73 on the substrate 1.

[0128] Since the refractive index of the first part 81 is greater than that of the color resist layer 10, the light emitted by the light-emitting device 4 will be refracted when it passes through the contact interface between the first part 81 and the color resist layer 10. By adjusting the refractive index of the first part 81 and the color resist layer 10, the light can be converged and tend to be collimated, thereby improving the light emission efficiency of the light-emitting device 4 at the positive viewing angle; that is, the display module in this embodiment adopts UBA technology.

[0129] In this embodiment, referring to Figures 7 and 8, the orthographic projection of the second portion 82 on the substrate 1 covers the third hole 73 and the orthographic projection of the side surface of the first light-transmitting layer 7 surrounding the third hole 73 that faces away from the substrate 1 on the substrate 1. Since the refractive index of the first light-transmitting layer 7 is less than that of the second light-transmitting layer 8, at the location of the third hole 73, when ambient light is incident on the contact interface between the second portion 82 and the first light-transmitting layer 7, by adjusting the refractive indices of the second portion 82 and the first light-transmitting layer 7, the incident ambient light can undergo total internal reflection at the contact interface, thereby increasing the amount of incident ambient light.

[0130] In this embodiment, referring to Figures 7 and 8, the refractive index of the second light-transmitting layer 8 ranges from 1.75 to 1.85. The cross-sectional shape of the first portion 81 perpendicular to the substrate 1 is trapezoidal, and the slope angle of the side of the first portion 81 ranges from 65° to 85°. The thickness of the first portion 81 ranges from 1.5 to 2.5 μm, and the distance between the orthographic projection boundary of the first portion 81 on the substrate 1 and the orthographic projection boundary of the first opening 21 on the substrate 1 ranges from 0 to 2 μm. In this embodiment, the refractive index of the color resist layer 10 ranges from 1.55 to 1.65, the thickness of the color resist layer 10 ranges from 2 to 4 μm, and the color resist layer 10 completely covers the first portion 81.

[0131] In some embodiments, referring to Figures 9 and 10, based on the schemes in Figures 7 and 8, the second portion 82 further extends to cover the sidewalls of the second hole 72 and the first hole 71. With this configuration, when ambient light is incident on the contact interface between the second portion 82 and the first light-transmitting layer 7 in the second hole 72, by adjusting the refractive index of the second portion 82 and the first light-transmitting layer 7, total internal reflection of the incident ambient light can occur at the contact interface, thereby increasing the amount of ambient light incident at the location of the second hole 72.

[0132] In some embodiments, referring to Figures 11 and 12, based on the schemes in Figures 9 and 10, the orthographic projection of the second portion 82 on the substrate 1 further extends to cover the orthographic projection of the second hole 72 on the substrate 1. With this configuration, when ambient light is incident on the contact interface between the second portion 82 and the first light-transmitting layer 7 in the second hole 72, by adjusting the refractive index of the second portion 82 and the first light-transmitting layer 7, total internal reflection of the incident ambient light can also occur at the contact interface, thereby increasing the amount of ambient light incident at the location of the second hole 72.

[0133] In some embodiments, referring to Figures 7-12, the display module further includes a planarization layer 11 located on the side of the second light-transmitting layer 8, the black matrix 9, and the color resist layer 10 facing away from the substrate 1. The planarization layer 11 enables the display-side surface of the display module to be flat. In this embodiment, the refractive index of the planarization layer 11 is not limited. The planarization layer 11 is made of a light-transmitting organic compound material, such as an organic resin material.

[0134] In some embodiments, referring to FIG13, the first light-transmitting layer 7 is reused as the first color resist layer 101, the second light-transmitting layer 8 is reused as the planarization layer 11, and the display module further includes a second color resist layer 102 and a third color resist layer 103, located between the first color resist layer 101 and the planarization layer 11; the orthographic projections of the first color resist layer 101, the second color resist layer 102 and the third color resist layer 103 on the substrate 1 respectively cover the orthographic projections of different first openings 21 on the substrate 1; the orthographic projections of the second color resist layer 102 and the second hole 72 and the third hole 73 on the substrate 1 do not overlap; the orthographic projections of the third color resist layer 103 and the second hole 72 and the third hole 73 on the substrate 1 do not overlap; the orthographic projections of the portions of the first color resist layer 101, the second color resist layer 102 and the third color resist layer 103 located outside the areas of the first hole 71, the second hole 72 and the third hole 73 on the substrate 1 overlap.

[0135] The first color resist layer 101 is a red color resist layer; the second color resist layer 102 is a green color resist layer; and the third color resist layer 103 is a blue color resist layer. The portions of the first color resist layer 101, the second color resist layer 102, and the third color resist layer 103 located outside the areas of the first hole 71, the second hole 72, and the third hole 73 overlap on the substrate 1, preventing incident light from passing through, thereby forming a black matrix.

[0136] In this embodiment, referring to FIG13, since the refractive index of the first light-transmitting layer 7 is less than that of the second light-transmitting layer 8, at the position of the third hole 73, when ambient light is incident on the contact interface between the planarization layer and the first color resist layer 101, by adjusting the refractive index of the planarization layer and the first color resist layer 101, the incident ambient light can undergo total internal reflection at the contact interface, thereby increasing the amount of incident ambient light.

[0137] In some embodiments, referring to FIG13, the display module further includes a third light-transmitting layer 12 located between the encapsulation layer 5 and the first light-transmitting layer 7. The orthographic projection of the third light-transmitting layer 12 on the substrate 1 is located within the orthographic projection of the first hole 71 on the substrate 1, and the orthographic projection of the third light-transmitting layer 12 on the substrate 1 covers the orthographic projection of the first opening 21 on the substrate 1. The refractive index of the third light-transmitting layer 12 is greater than the refractive index of the first color resist layer 101. The refractive index of the third light-transmitting layer 12 is greater than the refractive index of the second color resist layer 102. The refractive index of the third light-transmitting layer 12 is greater than the refractive index of the third color resist layer 103.

[0138] In this embodiment, because the refractive index of the third light-transmitting layer 12 is greater than that of the first color resist layer 101, the light emitted by the light-emitting device 4 will be refracted when it passes through the interface between the third light-transmitting layer 12 and the first color resist layer 101. By adjusting the refractive indices of the third light-transmitting layer 12 and the first color resist layer 101, the light can be converged and tend to be collimated. Similarly, the light emitted by the light-emitting device 4 will be refracted when it passes through the interface between the third light-transmitting layer 12 and the second color resist layer 102. By adjusting the refractive indices of the third light-transmitting layer 12 and the second color resist layer 102, the light can be converged and tend to be collimated. The light emitted by the light-emitting device 4 will be refracted when it passes through the interface between the third light-transmitting layer 12 and the third color resist layer 103. By adjusting the refractive indices of the third light-transmitting layer 12 and the third color resist layer 103, the light can be converged and tend to be collimated. This improves the light emission efficiency of the light-emitting device 4 at the positive viewing angle. That is, the display module in this embodiment adopts UBA technology.

[0139] In some embodiments, referring to Figures 6-13, the distance between the orthographic projections of the first hole 71 and the first opening 21 on the substrate 1 ranges from 5 to 8 μm.

[0140] In some embodiments, referring to Figures 2-13, the cross-sectional shape of the first hole 71 perpendicular to the substrate 1 includes an inverted trapezoid, and the slope angle of the sidewall of the first hole 71 ranges from 55° to 85°; the cross-sectional shape of the second hole 72 perpendicular to the substrate 1 includes an inverted trapezoid, and the slope angle of the sidewall of the second hole 72 ranges from 55° to 85°; the aperture size of the second hole 72 ranges from 3 to 5 μm. The opening size of the second opening 22 ranges from 4 to 8 μm.

[0141] The display module provided in this disclosure provides an ambient light source that is incident on the display side of the display module and illuminates the second electrode covering the surface of the first structure. The light is then reflected by the second electrode to the reflective structure, which further reflects the light so that the reflected light can enter the second opening. This allows ambient light to pass through the second opening and illuminate the photosensitive surface of the photosensitive device. Compared with display modules in related technologies, this increases the amount of ambient light entering the photosensitive surface of the photosensitive device, ultimately improving the photosensitive device's ability to sense and recognize ambient light.

[0142] Secondly, embodiments of this disclosure also provide a display device, including the display module in the above embodiments.

[0143] By adopting the display module in the above embodiments, the ability of the photosensitive device in the display device to sense and recognize ambient light is improved, the light emission efficiency of the display device is improved, and the power consumption of the display device is reduced.

[0144] The display device provided in this disclosure can be any product or component with display function, such as an OLED panel, OLED TV, OLED billboard, monitor, mobile phone, or navigator.

[0145] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A display module, wherein, include: substrate; A pixel defining layer, a first structure, a light-emitting device, an encapsulation layer, and a reflective structure are sequentially stacked on one side of the substrate; The pixel defining layer has a first opening and a second opening, and the orthographic projections of the first opening and the second opening on the substrate do not overlap. The orthographic projection of the first structure on the substrate is located between the orthographic projections of the first opening and the second opening on the substrate, and the distance between the orthographic projections of the first structure and the first opening on the substrate is less than the distance between the orthographic projections of the first structure and the second opening on the substrate. The light-emitting device is located in the first opening, and the light-emitting device includes a first electrode, a light-emitting layer and a second electrode stacked sequentially in a direction away from the substrate, and the second electrode extends to at least cover the first structure and the pixel defining layer; The orthographic projection of the reflective structure on the substrate is located between the orthographic projections of the first structure and the second opening on the substrate, and the orthographic projections of the reflective structure, the second opening, and the first structure on the substrate do not overlap.

2. The display module according to claim 1, wherein, It also includes a first light-transmitting layer and a second light-transmitting layer, which are stacked sequentially on the side of the reflective structure away from the substrate; The refractive index of the first light-transmitting layer is less than the refractive index of the second light-transmitting layer; The first light-transmitting layer has a first hole, a second hole, and a third hole on the side opposite to the substrate, and the orthographic projections of the first hole, the second hole, and the third hole on the substrate do not overlap. The orthographic projection of the first hole on the substrate overlaps the orthographic projection of the first opening on the substrate; The orthographic projection of the second hole on the substrate is located within the orthographic projection of the second opening on the substrate; The orthographic projection of the third hole on the substrate is located between the orthographic projections of the first hole and the second hole on the substrate, and the orthographic projection of the third hole on the substrate is located between the orthographic projections of the first structure and the reflective structure on the substrate; The orthogonal projection of the first light-transmitting layer onto the substrate at least covers the orthogonal projection of the reflective structure onto the substrate; The orthogonal projection of the second light-transmitting layer on the substrate at least covers the orthogonal projection of the third hole on the substrate.

3. The display module according to claim 2, wherein, The number of the first openings is multiple. The orthographic projection of the second opening on the substrate is located at the midpoint of the distance between the orthographic projections of two adjacent first openings on the substrate. At least one of the first structures is provided between adjacent first openings and second openings; The number of the first holes is multiple. The orthographic projection of the second hole on the substrate is located at the midpoint of the distance between the orthographic projections of two adjacent first holes on the substrate; At least one third hole is provided between adjacent first holes and second holes.

4. The display module according to claim 2, wherein, The first hole may be a through hole or a blind hole; The second hole may be a through hole or a blind hole; The third hole may be a through hole or a blind hole.

5. The display module according to claim 1, wherein, The height of the first structure along the direction away from the substrate ranges from 0.5 to 1.5 μm. The cross-sectional shape of the first structure perpendicular to the substrate includes a trapezoid. The base angles of the trapezoid range from 40° to 65°. The width of the bottom edge of the trapezoid on the side furthest from the substrate ranges from 0.5 to 2 μm.

6. The display module according to claim 4, wherein, The diameter of the third hole ranges from 3 to 5 μm. The cross-sectional shape of the third hole perpendicular to the substrate includes an inverted trapezoid. The slope angle of the sidewall of the third hole ranges from 55° to 85°.

7. The display module according to claim 2, wherein, It also includes a black matrix and a color resist layer, located between the first light-transmitting layer and the second light-transmitting layer. The orthographic projection of the second light-transmitting layer onto the substrate covers the substrate; The color resist layer is located on the side of the black matrix opposite to the substrate, or the black matrix is ​​located on the side of the color resist layer opposite to the substrate. The orthographic projection of the color resist layer on the substrate covers the orthographic projection of the first hole on the substrate, and the orthographic projections of the color resist layer, the second hole, and the third hole on the substrate do not overlap; The black matrix does not overlap with the orthographic projections of the first hole, the second hole, and the third hole on the substrate.

8. The display module according to claim 2, wherein, It also includes a black matrix and a flattening layer. The second light-transmitting layer is reused as a color resist layer. The planarization layer is located on the side of the first light-transmitting layer opposite to the substrate. The black matrix and the color resist layer are located between the planarization layer and the first light-transmitting layer. The color resist layer is located on the side of the black matrix that is away from the substrate, or the black matrix is ​​located on the side of the color resist layer that is away from the substrate. The black matrix does not overlap with the orthographic projections of the first hole, the second hole, and the third hole on the substrate; The orthographic projection of the color resist layer on the substrate also extends to cover the orthographic projection of the first hole on the substrate.

9. The display module according to claim 7, wherein, It also includes a third light-transmitting layer, located between the first light-transmitting layer and the color-resisting layer. The orthographic projection of the third light-transmitting layer on the substrate is located within the orthographic projection of the first hole on the substrate, and the orthographic projection of the third light-transmitting layer on the substrate covers the orthographic projection of the first opening on the substrate. The orthogonal projection of the color resist layer on the substrate overlaps the orthogonal projection of the third light-transmitting layer on the substrate; The refractive index of the third light-transmitting layer is greater than that of the color resist layer.

10. The display module according to claim 2, wherein, It also includes a color resist layer and a black matrix, located on the side of the first light-transmitting layer opposite to the substrate. The black matrix does not overlap with the orthographic projections of the first hole, the second hole, and the third hole on the substrate; The second light-transmitting layer includes a first part and a second part. The first portion is located between the first light-transmitting layer and the color resist layer, and the orthographic projection of the color resist layer on the substrate covers the orthographic projection of the first portion on the substrate. The orthographic projection of the first portion and the color resist layer on the substrate is located within the orthographic projection of the first hole on the substrate, and the orthographic projection of the first portion on the substrate covers the orthographic projection of the first opening on the substrate; The refractive index of the first part is greater than the refractive index of the color resist layer; The second portion is located between the first light-transmitting layer and the black matrix, or the second portion is located on the side of the black matrix facing away from the substrate; The orthographic projection of the second part on the substrate covers the orthographic projection of the third hole on the substrate.

11. The display module according to claim 10, wherein, The second portion also extends to cover the sidewall of the second hole and the sidewall of the first hole.

12. The display module according to claim 11, wherein, The orthographic projection of the second portion on the substrate also extends to cover the orthographic projection of the second hole on the substrate.

13. The display module according to claim 3, wherein, The first light-transmitting layer is reused as the first color resist layer. The second light-transmitting layer is reused as a planarization layer. The display module further includes a second color resist layer and a third color resist layer, located between the first color resist layer and the planarization layer; The orthographic projections of the first color resist layer, the second color resist layer, and the third color resist layer on the substrate respectively cover the orthographic projections of different first openings on the substrate; The second color resist layer does not overlap with the orthographic projections of the second hole and the third hole on the substrate; The third color resist layer does not overlap with the orthographic projection of the second hole and the third hole on the substrate; The orthographic projections of the portions of the first color resist layer, the second color resist layer, and the third color resist layer located outside the first hole, the second hole, and the third hole on the substrate overlap.

14. The display module according to claim 13, wherein, It also includes a third light-transmitting layer, located between the encapsulation layer and the first light-transmitting layer. The orthographic projection of the third light-transmitting layer on the substrate is located within the orthographic projection of the first hole on the substrate, and the orthographic projection of the third light-transmitting layer on the substrate covers the orthographic projection of the first opening on the substrate. The refractive index of the third light-transmitting layer is greater than the refractive index of the first color-blocking layer; The refractive index of the third light-transmitting layer is greater than the refractive index of the second color resist layer; The refractive index of the third light-transmitting layer is greater than that of the third color-blocking layer.

15. The display module according to claim 7 or 8, wherein, The distance between the first hole and the first opening projected onto the substrate is in the range of 0 to 2 μm.

16. The display module according to any one of claims 9-14, wherein, The distance between the first hole and the first opening projected onto the substrate is in the range of 5 to 8 μm.

17. The display module according to any one of claims 7-14, wherein, The cross-sectional shape of the first hole perpendicular to the substrate includes an inverted trapezoid. The slope angle of the sidewall of the first hole ranges from 55° to 85°. The cross-sectional shape of the second hole perpendicular to the substrate includes an inverted trapezoid. The slope angle of the sidewall of the second hole ranges from 55° to 85°. The aperture size of the second hole ranges from 3 to 5 μm.

18. A display device, wherein, Includes the display module as described in any one of claims 1-17.

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