Display panel and electronic device

Abstract

Provided in the present application are a display panel and an electronic device. In the display panel, the size difference between a first optical portion and a first sub-pixel is a first difference value, and the size difference between a second optical portion and a second sub-pixel is a second difference value; when the light extraction efficiency of the first sub-pixel is at the maximum, the first difference value is a first preset value, and when the light extraction efficiency of the second sub-pixel is at the maximum, the second difference value is a second preset value; and the absolute value of the difference between the first difference value and the first preset value is smaller than the absolute value of the difference between the second difference value and the second preset value.

Description

Display panel and electronic device Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and an electronic device. Background Art

[0002] With the advancement of display technology, organic light-emitting diode (OLED) displays are widely used in various electronic devices. To reduce the power consumption and improve the luminous efficiency of OLED displays, a microlens structure is typically installed on the light-emitting side of the display's light-emitting unit to focus the light emitted by the unit and increase the intensity of the emitted light. However, while this microlens structure improves the light-emitting unit's light-emitting efficiency, it also introduces the problem of pinking at narrow viewing angles (e.g., 30 degrees). SUMMARY OF THE INVENTION

[0003] The present application provides a display panel and an electronic device to alleviate the technical problem of powdering at a small viewing angle (such as a 30-degree viewing angle) of existing display devices.

[0004] To solve the above problems, the technical solutions provided by this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a display panel, comprising:

[0006] substrate;

[0007] A plurality of sub-pixels are arranged in an array on one side of the substrate, including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein an area of ​​the first sub-pixel is larger than an area of ​​the second sub-pixel and smaller than an area of ​​the third sub-pixel;

[0008] a first optical film layer, disposed on a side of the plurality of sub-pixels away from the substrate, wherein the first optical film layer is provided with optical portions at positions corresponding to the sub-pixels, and a first gap is formed between adjacent optical portions;

[0009] a second optical film layer, disposed on a side of the first optical film layer away from the sub-pixel and filling the first gap, wherein the refractive index of the second optical film layer is smaller than the refractive index of the first optical film layer;

[0010] In which, the optical part includes a first optical part corresponding to the first sub-pixel and a second optical part corresponding to the second sub-pixel, the difference between the size of the first optical part and the size of the first sub-pixel is a first difference, the difference between the size of the second optical part and the size of the second sub-pixel is a second difference, the first difference corresponding to the maximum light extraction efficiency of the first sub-pixel is a first preset value, the second difference corresponding to the maximum light extraction efficiency of the second sub-pixel is a second preset value, and the absolute value of the difference between the first difference and the first preset value is smaller than the absolute value of the difference between the second difference and the second preset value.

[0011] In a second aspect, an embodiment of the present application further provides an electronic device, comprising a display panel, wherein the display panel comprises:

[0012] substrate;

[0013] A plurality of sub-pixels are arranged in an array on one side of the substrate, including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein an area of ​​the first sub-pixel is larger than an area of ​​the second sub-pixel and smaller than an area of ​​the third sub-pixel;

[0014] a first optical film layer, disposed on a side of the plurality of sub-pixels away from the substrate, wherein the first optical film layer is provided with optical portions at positions corresponding to the sub-pixels, and a first gap is formed between adjacent optical portions;

[0015] a second optical film layer, disposed on a side of the first optical film layer away from the sub-pixel and filling the first gap, wherein the refractive index of the second optical film layer is smaller than the refractive index of the first optical film layer;

[0016] In which, the optical part includes a first optical part corresponding to the first sub-pixel and a second optical part corresponding to the second sub-pixel, the difference between the size of the first optical part and the size of the first sub-pixel is a first difference, the difference between the size of the second optical part and the size of the second sub-pixel is a second difference, the first difference corresponding to the maximum light extraction efficiency of the first sub-pixel is a first preset value, the second difference corresponding to the maximum light extraction efficiency of the second sub-pixel is a second preset value, and the absolute value of the difference between the first difference and the first preset value is smaller than the absolute value of the difference between the second difference and the second preset value. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] FIG. 1 is a schematic diagram of color shift trajectories of a display device with and without microlenses in the related art.

[0019] FIG2 is a schematic diagram of a partial cross-sectional structure of a display panel provided in an embodiment of the present application.

[0020] FIG. 3 is a detailed schematic diagram of the display panel in FIG. 2 .

[0021] FIG. 4 is a partial detailed schematic diagram of the driving circuit layer in FIG. 2 .

[0022] FIG5 is a schematic diagram of a partial planar structure of a display panel provided in an embodiment of the present application.

[0023] FIG6 is a schematic diagram showing the corresponding relationship between the light extraction efficiency improvement ratio of a sub-pixel of a display panel provided by an embodiment of the present application and the difference between the sub-pixel and the optical portion.

[0024] FIG7 is a schematic diagram showing the corresponding relationship between the brightness attenuation of a sub-pixel of a display panel and the difference between the sub-pixel and the optical portion according to an embodiment of the present application. Modes for Carrying Out the Invention

[0025] The following descriptions of the embodiments are with reference to the attached diagrams to illustrate specific embodiments that the present application can be implemented in. The directional terms mentioned in this application, such as [up], [down], [front], [back], [left], [right], [inside], [outside], [side], etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are used to illustrate and understand the present application, rather than to limit the present application. In the figures, units with similar structures are represented by the same reference numerals. In the accompanying drawings, the thickness of some layers and areas is exaggerated for clarity of understanding and ease of description. That is, the size and thickness of each component shown in the drawings are arbitrarily shown, but the present application is not limited to this.

[0026] Setting a microlens focusing structure on the light-emitting side of the light-emitting unit of the existing display device will cause the problem of pinking at a small viewing angle (such as a 30-degree viewing angle). The inventors of the present application found in their research: Referring to Figure 1, Figure 1 is a schematic diagram of the color deviation trajectory of a display device with and without a microlens in the related art. Curve M in Figure 1 is a schematic diagram of the u'v' trajectory at different viewing angles when the display device is not provided with a microlens, and curve N is a schematic diagram of the u'v' trajectory at different viewing angles when the display device is provided with a microlens. It can be seen from Figure 1 that after the microlens is set, the u'v' trajectory at different viewing angles is offset to the lower right corner. At this time, the residual brightness of red is large, and the residual brightness of green is small, resulting in the problem of pinking at a small viewing angle (such as a 30-degree viewing angle).

[0027] In order to solve the above technical problems, the present application provides a display panel and an electronic device.

[0028] The display panel provided in the embodiment of the present application includes:

[0029] substrate;

[0030] A plurality of sub-pixels are arranged in an array on one side of the substrate, including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein an area of ​​the first sub-pixel is larger than an area of ​​the second sub-pixel and smaller than an area of ​​the third sub-pixel;

[0031] a first optical film layer, disposed on a side of the plurality of sub-pixels away from the substrate, wherein the first optical film layer is provided with optical portions at positions corresponding to the sub-pixels, and a first gap is formed between adjacent optical portions;

[0032] a second optical film layer, disposed on a side of the first optical film layer away from the sub-pixel and filling the first gap, wherein the refractive index of the second optical film layer is smaller than the refractive index of the first optical film layer;

[0033] In which, the optical part includes a first optical part corresponding to the first sub-pixel and a second optical part corresponding to the second sub-pixel, the difference between the size of the first optical part and the size of the first sub-pixel is a first difference, the difference between the size of the second optical part and the size of the second sub-pixel is a second difference, the first difference corresponding to the maximum light extraction efficiency of the first sub-pixel is a first preset value, the second difference corresponding to the maximum light extraction efficiency of the second sub-pixel is a second preset value, and the absolute value of the difference between the first difference and the first preset value is smaller than the absolute value of the difference between the second difference and the second preset value.

[0034] In one embodiment, the optical part also includes a third optical part arranged corresponding to the third sub-pixel, and the difference between the size of the third optical part and the size of the third sub-pixel is a third difference. The third difference corresponding to the light extraction efficiency of the third sub-pixel is the maximum is a third preset value, and the absolute value of the difference between the third difference and the third preset value is smaller than the absolute value of the difference between the second difference and the second preset value.

[0035] In one embodiment, the absolute value of the difference between the third difference and the third preset value is less than or equal to the absolute value of the difference between the first difference and the first preset value.

[0036] In one embodiment, the third preset value is greater than the second preset value and also greater than the first preset value.

[0037] In one embodiment, the third preset value is 2 micrometers, and the first preset value and the second preset value are both 1 micrometer.

[0038] In one embodiment, the absolute value range of the difference between the first difference and the first preset value is 0~3 microns; the absolute value range of the difference between the second difference and the second preset value is 1~6 microns; the absolute value range of the difference between the third difference and the third preset value is 0~3 microns.

[0039] In one embodiment, the first difference ranges from 0 to 4 micrometers, the second difference ranges from 2 to 7 micrometers, and the third difference ranges from 0 to 4 micrometers.

[0040] In one embodiment, the first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

[0041] In one embodiment, the first optical film layer further includes a plurality of supporting parts, the supporting parts are located in the first gap, and the second optical film layer located in the first gap also covers the supporting parts; the display panel further includes a touch structure, and the touch structure is arranged on the supporting parts.

[0042] In one embodiment, the first optical film layer includes a first sublayer and a second sublayer, the second sublayer is located on a side of the first sublayer away from the sub-pixel, the first sublayer includes a first subpart of the supporting part, and the second sublayer includes a second subpart of the supporting part; the touch structure includes a touch electrode and a bridging electrode, one of the touch electrode and the bridging electrode is located between the first sublayer and the second sublayer, and the other is located on a side of the second sublayer away from the first sublayer.

[0043] In one embodiment, the optical part includes a relative upper surface, a lower surface, and multiple side surfaces connected to the upper surface and the lower surface, the upper surface is located on the side of the lower surface away from the sub-pixel, and the second optical film layer covers the upper surface and the side surfaces of the optical part, wherein the orthographic projection of the upper surface of the optical part on the substrate is located within the range of the orthographic projection of the lower surface on the substrate.

[0044] An electronic device provided in an embodiment of the present application includes the display panel of one of the aforementioned embodiments.

[0045] In the display panel and electronic device provided in the present application, the display panel includes a substrate, a plurality of sub-pixels, and a plurality of optical parts arranged corresponding to the sub-pixels, the optical parts including a first optical part arranged corresponding to the first sub-pixel and a second optical part arranged corresponding to the second sub-pixel, the difference between the size of the first optical part and the size of the first sub-pixel is a first difference, the difference between the size of the second optical part and the size of the second sub-pixel is a second difference, the first difference corresponding to the maximum light extraction efficiency of the first sub-pixel is a first preset value, the second difference corresponding to the maximum light extraction efficiency of the second sub-pixel is a second preset value, the absolute value of the difference between the first difference and the first preset value is smaller than the absolute value of the difference between the second difference and the second preset value, so that the light extraction efficiency of the first sub-pixel is closer to its maximum light extraction efficiency position to accelerate the attenuation of the luminous brightness of the first sub-pixel, and the light extraction efficiency of the second sub-pixel is away from its maximum light extraction efficiency position to slow down the attenuation of the luminous brightness of the second sub-pixel, thereby improving the problem of pinking at small viewing angles (such as 30 degrees) caused by microlenses.

[0046] The display panel and electronic device of the present application will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0047] Please refer to Figures 2 to 7. Figure 2 is a schematic diagram of a partial cross-sectional structure of a display panel provided in an embodiment of the present application. Figure 3 is a schematic diagram of a detail of the display panel in Figure 2. Figure 4 is a schematic diagram of a partial detail of the driving circuit layer in Figure 2. Figure 5 is a schematic diagram of a partial planar structure of a display panel provided in an embodiment of the present application. Figure 6 is a schematic diagram of the corresponding relationship between the light extraction efficiency improvement ratio of a sub-pixel of a display panel provided in an embodiment of the present application and the difference between the sub-pixel and the optical portion. Figure 7 is a schematic diagram of the corresponding relationship between the brightness attenuation of a sub-pixel of a display panel provided in an embodiment of the present application and the difference between the sub-pixel and the optical portion. The display panel 100 includes an OLED display panel, etc. The OLED display panel can realize a flexible display, and thus can be bent and folded.

[0048] 2 , the display panel 100 includes a substrate 10, a plurality of sub-pixels 20, and a first optical film layer 70 and a second optical film layer 80. The plurality of sub-pixels 20 are arranged in an array on one side of the substrate 10. The plurality of sub-pixels 20 include a first sub-pixel 21, a second sub-pixel 22, and a third sub-pixel 23. The area of ​​the first sub-pixel 21 is larger than the area of ​​the second sub-pixel 22, and smaller than the area of ​​the third sub-pixel 23. For example, the first sub-pixel 21 is a red sub-pixel, the second sub-pixel 22 is a green sub-pixel, and the third sub-pixel 23 is a blue sub-pixel. Sub-pixels of different colors emit different colors of light: the red sub-pixel emits red light, the green sub-pixel emits green light, and the blue sub-pixel emits blue light.

[0049] The first optical film layer 70 is disposed on a side of the plurality of sub-pixels 20 away from the substrate 10. The first optical film layer 70 is provided with optical portions 30 at positions corresponding to the sub-pixels 20, with first gaps 301 defined between adjacent optical portions 30. The second optical film layer 80 is disposed on a side of the first optical film layer 70 away from the sub-pixels 20 and fills the first gaps 301. The refractive index of the second optical film layer 80 is lower than that of the first optical film layer 70.

[0050] The refractive index of the first optical film layer 70 is in the range of 1.5-1.9. The refractive index of the second optical film layer 80 is in the range of 1.3-1.6. For example, in this embodiment, the refractive index of the first optical film layer 70 is 1.4. The refractive index of the second optical film layer 80 is 1.7. Optionally, the material of the first optical film layer 70 includes a high-transmittance inorganic material such as silicon oxide and silicon nitride, and the second optical film layer 80 is a high-transmittance organic material such as PAS glue.

[0051] The plurality of optical portions 30 include a first optical portion 31 and a second optical portion 32. The first optical portion 31 is provided corresponding to the first sub-pixel 21, and the second optical portion 32 is provided corresponding to the second sub-pixel 22. The difference between the size L1 of the first optical portion 31 and the size LR of the first sub-pixel 21 is a first difference CD1, and the difference between the size L2 of the second optical portion 32 and the size LG of the second sub-pixel 22 is a second difference CD2. The first difference corresponding to the maximum light extraction efficiency of the first sub-pixel 21 is a first preset value, and the second difference corresponding to the maximum light extraction efficiency of the second sub-pixel 22 is a second preset value. The absolute value of the difference between the first difference CD1 and the first preset value is smaller than the absolute value of the difference between the second difference CD2 and the second preset value. In this way, by moving the light extraction efficiency of the first sub-pixel 21 closer to its maximum light extraction efficiency position, the attenuation of the luminance of the first sub-pixel 21 is accelerated, and the light extraction efficiency of the second sub-pixel 22 is moved away from its maximum light extraction efficiency position, slowing the attenuation of the luminance of the second sub-pixel 22. As a result, in the mixed color light formed by the first and second sub-pixels 21, the proportion of the luminance of the first sub-pixel 21 decreases, while the proportion of the luminance of the second sub-pixel 22 increases, thereby improving the problem of pinking at small viewing angles (e.g., 30 degrees) that exists in existing display devices. It should be noted that the above-mentioned light extraction efficiency refers to the light extraction efficiency of the light-emitting sub-pixels (e.g., the first sub-pixel 21, the second sub-pixel 22, etc.) at the normal viewing angle of the display panel after the light emitted by the light-emitting sub-pixels passes through the first and second optical film layers 70, 80. After passing through the first and second optical film layers 70, 80, the light emitted by the light-emitting sub-pixels converges at the normal viewing angle, thereby improving the light extraction efficiency at the normal viewing angle. When the light-emitting part and its corresponding light-emitting sub-pixel are designed in coordination, the greater the size difference between them is not necessarily the case, the higher the light-emitting efficiency at the normal viewing angle will be. Instead, as the size difference increases, the light-emitting efficiency at the normal viewing angle first increases to a maximum value and then decreases.

[0052] It should be noted that the difference between the size of the optical portion 30 and the size of the corresponding sub-pixel 20 refers to the distance between the outer contour of the orthographic projection of the optical portion 30 on the substrate 10 and the outer contour of the orthographic projection of the sub-pixel 20 on the substrate 10. The size of the optical portion 30 can be characterized by the key dimension of the orthographic projection of the optical portion 30 on the substrate 10, and the key dimension of the orthographic projection depends on the specific shape of the orthographic projection. For example, when the shape of the orthographic projection of the optical portion 30 is a circle, the key dimension of the orthographic projection can be characterized by the diameter of the circle; when the shape of the orthographic projection of the optical portion 30 is a square, the key dimension of the orthographic projection can be characterized by the diagonal length of the square. Similarly, the definition of the size of the sub-pixel 20 can refer to the definition of the size of the optical portion 30, which will not be repeated here.

[0053] The difference between the size of the optical portion 30 and the size of the sub-pixel 20 corresponding to the optical portion 30 is the difference obtained by subtracting the size of the corresponding sub-pixel 20 from the size of the optical portion 30. The difference can be positive, negative, or 0. When the difference is a positive number, it indicates that the size of the optical portion 30 is larger than the size of the corresponding sub-pixel 20; when the difference is a negative number, it indicates that the size of the optical portion 30 is smaller than the size of the corresponding sub-pixel 20; and when the difference is 0, it indicates that the size of the optical portion 30 is equal to the size of the corresponding sub-pixel 20.

[0054] In one embodiment, the optical portion 30 further includes a third optical portion 33, which is disposed corresponding to the third sub-pixel 23. The difference between the size L3 of the third optical portion 33 and the size LB of the third sub-pixel 23 is a third difference CD3. The third difference corresponding to the maximum light extraction efficiency of the third sub-pixel 23 is a third preset value. The absolute value of the difference between the third difference CD3 and the third preset value is less than the absolute value of the difference between the second difference CD2 and the second preset value. The absolute value of the difference between the third difference CD3 and the third preset value is less than or equal to the absolute value of the difference between the first difference CD1 and the first preset value. In this way, by bringing the light extraction efficiency of the third sub-pixel 23 closer to its maximum light extraction efficiency position, the luminance decay of the third sub-pixel 23 is accelerated, and the curve N in FIG1 is shifted to the upper left. This further improves the pinking problem of existing display devices at small viewing angles (e.g., 30 degrees).

[0055] The overall structure of the display panel 100 will be described in detail below.

[0056] 2 , 3 and 4 , the display panel 100 further includes a driving circuit layer 40 disposed on one side of the substrate 10 , a light-emitting functional layer 50 disposed on a side of the driving circuit layer 40 away from the substrate 10 , and an encapsulation layer 60 disposed on the light-emitting functional layer 50 , and the optical portion 30 is disposed on a side of the encapsulation layer 60 away from the light-emitting functional layer 50 .

[0057] The material of the substrate 10 includes a flexible material such as polyimide (PI). A flexible display panel 100 can be manufactured using a flexible material as the substrate 10 to achieve a display panel 100 with special properties such as bending and curling. For example, the flexible display panel 100 can be used to manufacture a multi-curved display screen to achieve a higher screen-to-body ratio.

[0058] 4 , the driving circuit layer 40 is disposed on one side of the substrate 10. Optionally, a buffer layer 12 may be disposed between the substrate 10 and the driving circuit layer 40. The buffer layer 12 may be made of inorganic materials such as silicon oxide (SiOx), silicon nitride (SiNx), and silicon oxynitride (SiON). The buffer layer 12 may prevent unwanted impurities or contaminants (such as moisture and oxygen) from diffusing from the substrate 10 into devices that may be damaged by these impurities or contaminants, while also providing a flat top surface.

[0059] The driving circuit layer 40 includes an active layer 41, a gate insulating layer 42, a gate 43, an interlayer insulating layer 44, a source electrode 45, a drain electrode 46, and a planarization layer 47, which are sequentially stacked on the buffer layer 12. The active layer 41 is disposed on a side of the buffer layer 12 away from the substrate 10 and includes a channel region 411 and a source region 412 and a drain region 413 located on both sides of the channel region 411.

[0060] The gate insulating layer 42 covers the active layer 41 and the buffer layer 12. The gate 43 is disposed on a side of the gate insulating layer 42 away from the active layer 41. The gate 43 is disposed corresponding to the channel region 411. The interlayer insulating layer 44 covers the gate 43 and the gate insulating layer 42.

[0061] The source electrode 45 and the drain electrode 46 are disposed on a side of the interlayer insulating layer 44 away from the gate electrode 43. The source electrode 45 and the drain electrode 46 are connected to the source region 412 and the drain region 413 of the active layer 41, respectively, through via holes in the interlayer insulating layer 44 and the gate insulating layer 42. The planarization layer 47 covers the source electrode 45, the drain electrode 46, and the interlayer insulating layer 44 to provide a flat surface for the driving circuit layer 40.

[0062] 3 and 4 , the light-emitting functional layer 50 is disposed on the driving circuit layer 40. The light-emitting functional layer 50 includes a first electrode 51, a second electrode 52, and a light-emitting unit located between the first electrode 51 and the second electrode 52. The first electrode 51 is an anode, the second electrode 52 is a cathode, the first electrode 51 is an independent electrode pattern, and the second electrode 52 is disposed on the entire surface. The first electrode 51 is disposed on the surface of the planarization layer 47 and is connected to the source electrode 45 or the drain electrode 46 through a via in the planarization layer 47. As shown in FIG4 , the first electrode 51 is connected to the drain electrode 46.

[0063] The display panel 100 also includes a pixel definition layer 11, which covers the first electrode 51 and the planarization layer 47 and has an opening 111 provided at a position corresponding to the first electrode 51. The opening 111 exposes a portion of the first electrode 51 to define the location of each sub-pixel 20, wherein the area corresponding to the opening 111 is also the light-emitting area of ​​the sub-pixel 20. For example, as schematically shown in FIG4 , taking the first sub-pixel 21 as an example, the opening 111 exposes a portion of the first electrode 51 to define the location of the first sub-pixel 21, wherein the area corresponding to the opening 111 is also the light-emitting area of ​​the first sub-pixel 21. The light-emitting unit is provided within the opening 111 and covers the first electrode 51. The second electrode 52 covers the light-emitting unit and the pixel definition layer 11. The light-emitting unit emits light under the combined action of the first electrode 51 and the second electrode 52.

[0064] It should be noted that each sub-pixel 20 in this application is a light-emitting unit, that is, the light-emitting unit is used to represent the sub-pixel 20 in this application. The size of the light-emitting unit is the size of the corresponding sub-pixel 20, and the size of the light-emitting unit is generally determined by the size of the opening 111 of the pixel definition layer 11. The light-emitting unit is formed by the light-emitting material printed within the opening 111 of the pixel definition layer 11, and different colors of light-emitting materials form light-emitting units of different colors.

[0065] Continuing with FIG3 , in order to protect the light-emitting units and prevent them from failing due to water and oxygen intrusion, the display panel 100 further includes an encapsulation layer 60 disposed on a side of the light-emitting functional layer 50 away from the driving circuit layer 40. Optionally, the encapsulation layer 60 may be a thin film encapsulation layer. For example, the encapsulation layer 60 may be a laminated structure formed by sequentially stacking three thin films: a first inorganic encapsulation layer 61, an organic encapsulation layer 62, and a second inorganic encapsulation layer 63, or a laminated structure comprising one or more layers.

[0066] 2 and 3 , the first optical film layer 70 is disposed on a side of the encapsulation layer 60 away from the light-emitting functional layer 50, and the second optical film layer 80 is disposed on a side of the first optical film layer 70 away from the encapsulation layer 60. The first optical film layer 70 includes a plurality of optical portions 30 disposed corresponding to the sub-pixels 20. The optical portion 30 includes an upper surface 302 and a lower surface 303 that are opposite to each other, and a plurality of side surfaces 304 connected to the upper surface 302 and the lower surface 303. The upper surface 302 is located on a side of the lower surface 303 away from the sub-pixel 20. The second optical film layer 80 covers the upper surface 302 and the side surfaces 304 of the optical portion 30. The orthographic projection of the upper surface 302 of the optical portion 30 on the substrate 10 is within the range of the orthographic projection of the lower surface 303 on the substrate 10. A gap exists between the outer contour of the orthographic projection of the upper surface 302 of the optical portion 30 on the substrate 10 and the outer contour of the orthographic projection of the lower surface 303 on the substrate 10. In other words, the orthographic projection area of ​​the upper surface 302 is smaller than the orthographic projection area of ​​the lower surface 303. In short, the area of ​​the upper surface 302 of the optical portion 30 is smaller than that of the lower surface 303, and the longitudinal cross-section of the optical portion 30 is trapezoidal.

[0067] The optical portion 30 can converge the light emitted from the sub-pixel 20 to improve light extraction efficiency. Taking the first optical portion 31 as an example, with reference to FIG3 , when light a emitted from the first sub-pixel 21 passes through the first optical portion 31, because the refractive index of the first optical portion 31 is greater than the refractive index of the second optical film layer 80, light a undergoes refraction at the interface between the first optical portion 31 and the second optical film layer 80, changing its optical path. This causes light a passing through the first optical portion 31 to converge toward the central light extraction area of ​​the first sub-pixel 21, thereby improving light extraction efficiency.

[0068] Optionally, the first optical film layer 70 further includes a plurality of support portions 71, the support portions 71 being located within the first gaps 301. The second optical film layer 80 located within the first gaps 301 further covers the support portions 71. The display panel 100 further includes a touch structure 90 to implement a touch function of the display panel 100. The touch structure 90 is disposed on the support portions 71.

[0069] Specifically, the first optical film layer 70 includes a first sublayer 72 and a second sublayer 73. The second sublayer 73 is located on a side of the first sublayer 72 away from the subpixel 20. The first sublayer 72 includes a first subportion 711 of the support portion 71, and the second sublayer 73 includes a second subportion 712 of the support portion 71. The touch structure 90 includes a touch electrode 91 and a bridging electrode 92. One of the touch electrode 91 and the bridging electrode 92 is located between the first sublayer 72 and the second sublayer 73, and the other is located on a side of the second sublayer 73 away from the first sublayer 72. This embodiment is described by taking the example of the bridging electrode 92 being located between the first sublayer 72 and the second sublayer 73, and the touch electrode 91 being located on a side of the second sublayer 73 away from the first sublayer 72. Correspondingly, the optical part 30 is also formed by the first sub-layer 72 and the second sub-layer 73. Taking the first optical part 31 as an example, the first sub-layer 72 also includes the third sub-part 311 of the first optical part 31, and the second sub-layer 73 also includes the fourth sub-part 312 of the first optical part 31.

[0070] In this way, by integrating the optical portion 30 and the touch structure 90, the optical portion 30 and the touch structure 90 share part of the film layer, so that the optical portion 30 can be formed by setting a relatively thin high-refractive material, and the thickness of the display panel 100 can be reduced. Compared with the related art of forming a microlens structure by leveling a relatively thick high-refractive material, the optical portion 30 formed in the present application is obviously more conducive to realizing a bendable or foldable display panel 100.

[0071] The differentiated designs of the optical portion 30 corresponding to different sub-pixels 20 will be further described in detail below with reference to FIG. 2 , FIG. 5 , FIG. 6 and FIG. 7 .

[0072] In one embodiment, referring to FIG. 2 , the difference between the size L1 of the first optical portion 31 and the size LR of the first sub-pixel 21 is a first difference CD1, the difference between the size L2 of the second optical portion 32 and the size LG of the second sub-pixel 22 is a second difference CD2, and the difference between the size L3 of the third optical portion 33 and the size LB of the third sub-pixel 23 is a third difference CD3. The first difference corresponding to the maximum light extraction efficiency of the first sub-pixel 21 is a first preset value, the second difference corresponding to the maximum light extraction efficiency of the second sub-pixel 22 is a second preset value, and the third difference corresponding to the maximum light extraction efficiency of the third sub-pixel 23 is a third preset value. The absolute value of the difference between the first difference CD1 and the first preset value is smaller than the absolute value of the difference between the second difference CD2 and the second preset value, and the absolute value of the difference between the third difference CD3 and the third preset value is smaller than the absolute value of the difference between the second difference CD2 and the second preset value. Optionally, the absolute value of the difference between the third difference CD3 and the third preset value is smaller than or equal to the absolute value of the difference between the first difference CD1 and the first preset value.

[0073] 6 and 7 , which are simulation data provided by an embodiment of the present application, in FIG6 , the horizontal axis represents the size difference between the optical portion 30 and the corresponding sub-pixel 20, in micrometers, and the vertical axis represents the light output efficiency improvement ratio. Curves A, B, and C in the figure respectively represent the light output efficiency improvement ratio of the first sub-pixel 21, the second sub-pixel 22, and the third sub-pixel 23 as the size difference between the optical portion 30 and the corresponding sub-pixel 20 changes, and curve D represents a trend graph of the light output efficiency improvement ratio of white light mixed from the light output of sub-pixels 20 of three different luminous colors. In Figure 7, the horizontal axis represents the size difference between the optical portion 30 and the corresponding sub-pixel 20, in microns, and the vertical axis represents the light output brightness attenuation ratio. Curve E in the figure represents a trend diagram of the light output brightness attenuation ratio of white light mixed from the output lights of the three sub-pixels 20 with different luminous colors. By comparing Figure 6 and Figure 7, it can be seen that the improvement ratio of the light output efficiency has the same change trend as the light output brightness attenuation ratio, that is, both first increase and then decrease as the size difference between the optical portion 30 and the corresponding sub-pixel 20 increases.

[0074] Continuing with FIG. 6 , it can be seen that for the first sub-pixel 21, the light extraction efficiency of the first sub-pixel 21 is highest when the size difference between the first optical portion 31 and the first sub-pixel 21 is 1 micron. For the second sub-pixel 22, the light extraction efficiency of the second sub-pixel 22 is highest when the size difference between the second optical portion 32 and the second sub-pixel 22 is 1 micron. For the third sub-pixel 23, the light extraction efficiency of the third sub-pixel 23 is highest when the size difference between the third optical portion 33 and the third sub-pixel 23 is 2 microns. In other words, the third preset value is greater than the second preset value and also greater than the first preset value. Optionally, the third preset value is 2 microns, and both the first and second preset values ​​are 1 micron.

[0075] Optionally, the absolute value range of the difference between the first difference CD1 and the first preset value is 0 to 3 microns, that is, the absolute value of the difference between the first difference CD1 and the first preset value is greater than or equal to 0 microns and less than or equal to 3 microns, for example, the absolute value of the difference between the first difference CD1 and the first preset value is 0 microns, 0.2 microns, 0.4 microns, 0.5 microns, 0.6 microns, 0.7 microns, 0.8 microns, 0.9 microns, 1 micron, 1.5 microns, 1.8 microns, 2 microns, 2.3 microns, 2.7 microns, 3 microns, etc.; the absolute value range of the difference between the second difference CD2 and the second preset value is 1 to 6 microns, that is, the absolute value of the difference between the second difference CD1 and the second preset value is greater than or equal to 1 micron and less than or equal to 6 microns, for example, the absolute value of the difference between the second difference CD1 and the second preset value is greater than or equal to 1 micron and less than or equal to 6 microns. the absolute value of the difference between the third difference CD3 and the third preset value is 0 to 3 microns, that is, the absolute value of the difference between the third difference CD1 and the third preset value is greater than or equal to 0 microns and less than or equal to 3 microns. For example, the absolute value of the difference between the third difference CD1 and the third preset value is 0 microns, 0.2 microns, 0.4 microns, 0.5 microns, 0.6 microns, 0.7 microns, 0.8 microns, 0.9 microns, 1 micron, 1.5 microns, 1.8 microns, 2 microns, 2.3 microns, 2.7 microns, 3 microns, etc.

[0076] In one embodiment, referring to FIG5 , the first sub-pixel 21 is a red sub-pixel R, the second sub-pixel 22 is a green sub-pixel G, and the third sub-pixel 23 is a blue sub-pixel B. The area of ​​the first sub-pixel 21 is larger than that of the second sub-pixel 22, and smaller than that of the third sub-pixel 23. The first difference CD1 ranges from 0 to 4 microns, that is, the first difference CD1 between the first optical portion 31 and the first sub-pixel 21 is greater than or equal to 0 microns and less than or equal to 4 microns. For example, the first difference CD1 is 0 microns, 0.2 microns, 0.4 microns, 0.6 microns, 0.8 microns, 0.9 microns, 1 micron, 1.1 microns, 1.2 microns, 1.3 microns, 1.4 microns, 1.5 microns, 1.6 microns, 1.7 microns, 1.8 microns, 1.9 microns, 2 microns, 2.3 microns, 2.6 microns, 2.9 microns, 3 microns, 3.5 microns, 3.8 microns, 4 microns, etc. The range of the second difference CD2 is 2 to 7 microns, that is, the second difference CD2 between the second optical portion 32 and the second sub-pixel 22 is greater than or equal to 2 microns and less than or equal to 7 microns. For example, the second difference CD2 is 2 microns, 2.3 microns, 2.5 microns, 2.8 microns, 3 microns, 3.1 microns, 3.2 microns, 3.3 microns, 3.5 microns, 3.6 microns, 3.7 microns, 3.8 microns, 3.9 microns, 4 microns, 4.3 microns, 4.5 microns, 4.8 microns, 5 microns, 5.5 microns, 6 microns, 6.5 microns, 7 microns, etc. The range of the third difference CD3 is 0~4 microns, that is, the third difference CD3 between the third optical portion 33 and the third sub-pixel 23 is greater than or equal to 0 microns and less than or equal to 4 microns. For example, the third difference CD3 is 0 microns, 0.2 microns, 0.4 microns, 0.6 microns, 0.8 microns, 0.9 microns, 1 micron, 1.1 microns, 1.2 microns, 1.3 microns, 1.4 microns, 1.5 microns, 1.6 microns, 1.7 microns, 1.8 microns, 1.9 microns, 2 microns, 2.3 microns, 2.6 microns, 2.9 microns, 3 microns, 3.5 microns, 3.8 microns, 4 microns, etc. Optionally, the first difference CD1 may be greater than the second difference CD2, or less than the second difference CD2, the third difference CD3 may be greater than the second difference CD2, or less than the second difference CD2, the first difference CD1 may be greater than the third difference CD3, or less than the third difference CD3. For example, in Figure 5 of this embodiment, the first difference CD1 is smaller than the second difference CD2, the third difference CD3 is also smaller than the second difference CD2, and the first difference CD1 is also smaller than the third difference CD3.

[0077] Based on the same inventive concept, an embodiment of the present application further provides an electronic device, which includes the display panel 100 of one of the above embodiments. The electronic device can be a mobile phone, a tablet, a television, a wearable electronic device, etc.

[0078] According to the embodiment described, it can be seen that:

[0079] The present application provides a display panel and an electronic device, wherein the display panel includes a substrate, a plurality of sub-pixels, and a plurality of optical portions arranged corresponding to the sub-pixels, the optical portions including a first optical portion arranged corresponding to the first sub-pixel and a second optical portion arranged corresponding to the second sub-pixel, the difference between the size of the first optical portion and the size of the first sub-pixel being a first difference, the difference between the size of the second optical portion and the size of the second sub-pixel being a second difference, the first difference corresponding to when the light extraction efficiency of the first sub-pixel is maximum being a first preset value, the second difference corresponding to when the light extraction efficiency of the second sub-pixel is maximum being a second preset value, the absolute value of the difference between the first difference and the first preset value being smaller than the absolute value of the difference between the second difference and the second preset value, so that the light extraction efficiency of the first sub-pixel is closer to its maximum light extraction efficiency position to accelerate the attenuation of the luminous brightness of the first sub-pixel, and the light extraction efficiency of the second sub-pixel is away from its maximum light extraction efficiency position to slow down the attenuation of the luminous brightness of the second sub-pixel, thereby improving the problem of pinking at small viewing angles (such as a 30-degree viewing angle) caused by microlenses.

[0080] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0081] The above is a detailed introduction to the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A display panel, comprising: a substrate; a plurality of sub-pixels, arranged in an array on one side of the substrate, including a first sub-pixel, a second sub-pixel, and a third sub-pixel, wherein the area of the first sub-pixel is larger than the area of the second sub-pixel and smaller than the area of the third sub-pixel; a first optical film layer, disposed on the side of the plurality of sub-pixels away from the substrate, and optical portions are provided at positions corresponding to the sub-pixels on the first optical film layer, and a first gap is provided between adjacent optical portions; and a second optical film layer, disposed on the side of the first optical film layer away from the sub-pixels and filling the first gap, and the refractive index of the second optical film layer is smaller than the refractive index of the first optical film layer; wherein, the optical portion includes a first optical portion corresponding to the first sub-pixel and a second optical portion corresponding to the second sub-pixel, the difference between the size of the first optical portion and the size of the first sub-pixel is a first difference value, the difference between the size of the second optical portion and the size of the second sub-pixel is a second difference value, the first difference value corresponding to the maximum light extraction efficiency of the first sub-pixel is a first preset value, the second difference value corresponding to the maximum light extraction efficiency of the second sub-pixel is a second preset value, and the absolute value of the difference between the first difference value and the first preset value is smaller than the absolute value of the difference between the second difference value and the second preset value.

2. The display panel according to claim 1, wherein, The optical portion further includes a third optical portion corresponding to the third sub-pixel, the difference between the size of the third optical portion and the size of the third sub-pixel is a third difference value, the third difference value corresponding to the maximum light extraction efficiency of the third sub-pixel is a third preset value, and the absolute value of the difference between the third difference value and the third preset value is smaller than the absolute value of the difference between the second difference value and the second preset value.

3. The display panel according to claim 2, wherein, The absolute value of the difference between the third difference value and the third preset value is less than or equal to the absolute value of the difference between the first difference value and the first preset value.

4. The display panel according to claim 3, wherein, The third preset value is greater than the second preset value and also greater than the first preset value.

5. The display panel according to claim 4, wherein, The third preset value is 2 microns, and both the first preset value and the second preset value are 1 micron.

6. The display panel according to claim 2, wherein, The absolute value range of the difference between the first difference value and the first preset value is 0 to 3 microns; the absolute value range of the difference between the second difference value and the second preset value is 1 to 6 microns; the absolute value range of the difference between the third difference value and the third preset value is 0 to 3 microns.

7. The display panel according to claim 6, wherein, The range of the first difference value is 0 to 4 microns, the range of the second difference value is 2 to 7 microns, and the range of the third difference value is 0 to 4 microns.

8. The display panel according to claim 1, wherein, The first sub-pixel is a red sub-pixel, the second sub-pixel is a green sub-pixel, and the third sub-pixel is a blue sub-pixel.

9. The display panel according to any one of claims 1 to 8, wherein, The first optical film layer further includes a plurality of support portions, the support portions are located in the first gap, and the second optical film layer located in the first gap also covers the support portions; the display panel further includes a touch structure, and the touch structure is disposed on the support portions.

10. The display panel according to claim 9, wherein, The first optical film layer includes a first sub-layer and a second sub-layer. The second sub-layer is located on a side of the first sub-layer away from the sub-pixel. The first sub-layer includes a first sub-portion of the support portion, and the second sub-layer includes a second sub-portion of the support portion. The touch structure includes a touch electrode and a bridging electrode. One of the touch electrode and the bridging electrode is located between the first sub-layer and the second sub-layer, and the other is located on a side of the second sub-layer away from the first sub-layer.

11. The display panel according to claim 8, wherein, The optical portion includes an opposite upper surface, a lower surface, and a plurality of side surfaces connecting the upper surface and the lower surface. The upper surface is located on a side of the lower surface away from the sub-pixel. The second optical film layer covers the upper surface and the side surfaces of the optical portion. Wherein, a positive projection of the upper surface of the optical portion on the substrate is within a range of a positive projection of the lower surface on the substrate.

12. An electronic device, which includes a display panel, and the display panel includes: A substrate; A plurality of sub-pixels, arranged in an array on one side of the substrate, including a first sub-pixel, a second sub-pixel, and a third sub-pixel. An area of the first sub-pixel is larger than an area of the second sub-pixel and smaller than an area of the third sub-pixel; A first optical film layer, disposed on a side of the plurality of sub-pixels away from the substrate. The first optical film layer is provided with an optical portion at a position corresponding to the sub-pixel, and there is a first gap between adjacent optical portions; And A second optical film layer, disposed on a side of the first optical film layer away from the sub-pixel and filled in the first gap. A refractive index of the second optical film layer is less than a refractive index of the first optical film layer; Wherein, the optical portion includes a first optical portion corresponding to the first sub-pixel and a second optical portion corresponding to the second sub-pixel. A difference between a size of the first optical portion and a size of the first sub-pixel is a first difference value. A difference between a size of the second optical portion and a size of the second sub-pixel is a second difference value. The first difference value corresponding to the maximum light extraction efficiency of the first sub-pixel is a first preset value. The second difference value corresponding to the maximum light extraction efficiency of the second sub-pixel is a second preset value. An absolute value of a difference between the first difference value and the first preset value is less than an absolute value of a difference between the second difference value and the second preset value.

13. The electronic device according to claim 12, wherein, The optical portion further includes a third optical portion corresponding to the third sub-pixel. A difference between a size of the third optical portion and a size of the third sub-pixel is a third difference value. The third difference value corresponding to the maximum light extraction efficiency of the third sub-pixel is a third preset value. An absolute value of a difference between the third difference value and the third preset value is less than an absolute value of a difference between the second difference value and the second preset value.

14. The electronic device according to claim 13, wherein, An absolute value of a difference between the third difference value and the third preset value is less than or equal to an absolute value of a difference between the first difference value and the first preset value.

15. The electronic device according to claim 14, wherein, The third preset value is greater than the second preset value and also greater than the first preset value.

16. The electronic device according to claim 15, wherein, The third preset value is 2 microns, and both the first preset value and the second preset value are 1 micron.

17. The electronic device according to claim 13, wherein, The absolute value range of the difference between the first difference and the first preset value is 0 to 3 microns; the absolute value range of the difference between the second difference and the second preset value is 1 to 6 microns; the absolute value range of the difference between the third difference and the third preset value is 0 to 3 microns.

18. The electronic device according to claim 17, wherein, The range of the first difference is 0 to 4 microns, the range of the second difference is 2 to 7 microns, and the range of the third difference is 0 to 4 microns.

19. The electronic device according to claim 12, wherein, The first optical film layer further includes a plurality of support portions located in the first gap, and the second optical film layer located in the first gap further covers the support portions; the display panel further includes a touch structure disposed on the support portions.

20. The electronic device according to claim 19, wherein, The first optical film layer includes a first sub-layer and a second sub-layer, the second sub-layer is located on a side of the first sub-layer away from the sub-pixel, the first sub-layer includes a first sub-portion of the support portion, and the second sub-layer includes a second sub-portion of the support portion; the touch structure includes a touch electrode and a bridging electrode, and one of the touch electrode and the bridging electrode is located between the first sub-layer and the second sub-layer, and the other is located on a side of the second sub-layer away from the first sub-layer.

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