Display panel and electronic equipment

Abstract

A display panel according to an embodiment of the present disclosure includes: a substrate including a first surface and a second surface opposite to the first surface, the substrate having optical transparency; the plurality of light-emitting parts are periodically arranged on the first surface or above the first surface, and the light-emitting parts emit light to the outside of the display panel and block light rays from the outside of the display panel; and a correction structure disposed between the first surface and the plurality of light emitting portions, the correction structure configured to correct diffracted light generated by a gap between adjacent light emitting portions from outside the display panel, the diffracted light being generated for bypassing between the first surface and the plurality of light emitting portions.

Description

Technical Field

[0001] The present disclosure relates to a display panel and an electronic device, and more particularly to a display panel and an electronic device capable of capturing an object image through the display panel. Background Art

[0002] In recent years, in order to increase the display screen of electronic devices such as mobile phones, a technology has been adopted in which a camera is placed under the display panel (i.e., the back surface of the display panel) and an object image is captured by the camera of the display panel. Such a camera located under the display panel is called an under-display camera. A display panel using an organic light-emitting diode (OLED) can be used for imaging through the display panel. However, in an organic light-emitting diode display panel, diffracted light is generated when light passes through the gaps between periodically arranged pixels, and this diffracted light causes an imaging defect called a halo to appear in the image captured by the camera. To reduce such halos, existing technologies have taken measures such as sparsifying the pixels above the camera area of the display panel, reducing the pixel size to increase the light-transmitting gap, and eliminating the periodicity of the gap structure.

[0003] However, in all of these measures, it is difficult to sufficiently eliminate the halos in the image captured by the camera while maintaining the image quality displayed on the display panel. Summary of the Invention

[0004] The present disclosure aims to solve at least one of the above technical problems. Therefore, the present disclosure provides an imaging lens, a camera module, and an imaging device.

[0005] According to the present disclosure, a display panel includes:

[0006] a substrate including a first surface and a second surface opposite to the first surface, the substrate being optically transparent;

[0007] a plurality of light-emitting portions periodically disposed on or above the first surface, the light-emitting portions emitting light to the outside of the display panel and blocking light from the outside of the display panel;

[0008] a correction structure disposed between the first surface and the plurality of light-emitting portions, the correction structure being configured to correct diffracted light generated by light from the outside of the display panel passing through a gap between adjacent light-emitting portions, the diffracted light being generated to bypass between the first surface and the plurality of light-emitting portions.

[0009] According to the present disclosure, an electronic device includes:

[0010] the above display panel;

[0011] an imaging device disposed on the image side of the display panel. Description of the Drawings

[0012] These and / or other aspects and advantages of the embodiments of the present disclosure will become more apparent and understandable from the following description with reference to the accompanying drawings, in which:

[0013] Figure 1A is a schematic diagram showing the display state of an electronic device according to an example of the present disclosure;

[0014] Figure 1B is a schematic diagram showing the imaging state of an electronic device according to an example of the present disclosure;

[0015] Figure 2 is a plan view showing an application example of an electronic device according to an example of the present disclosure;

[0016] Figure 3 is a schematic cross-sectional view showing a display panel according to an example of the present disclosure;

[0017] Figure 4 is a plan view showing a light-emitting portion and a gap of a display panel according to an example of the present disclosure;

[0018] Figure 5 is a schematic diagram showing a calibration structure of a display panel according to an example of the present disclosure;

[0019] Figure 6 is an explanatory diagram for explaining an incident surface example of a calibration structure of a display panel according to an example of the present disclosure;

[0020] Figure 7 is an enlarged view of an exit surface of a calibration structure of a display panel according to an example of the present disclosure;

[0021] Figure 8 is an explanatory diagram for explaining an exit surface example of a calibration structure of a display panel according to an example of the present disclosure;

[0022] Figure 9 is a schematic diagram showing an exit surface of a calibration structure of a display panel according to a first modification example of the present disclosure;

[0023] Figure 10 is a schematic diagram showing a calibration structure of a display panel according to a second modification example of the present disclosure;

[0024] Figure 11 is a schematic diagram showing another example of a calibration structure of a display panel according to a second modification example of the present disclosure;

[0025] Figure 12 is an explanatory diagram for explaining a reflection surface example of a calibration structure of a display panel according to a second modification example of the present disclosure;

[0026] Figure 13 is a schematic diagram showing another example of the correction structure of the display panel according to the second modification of the present disclosure;

[0027] Figure 14 is for explaining the Figure 13 reflective surface of the correction structure of the corresponding display panel;

[0028] Figure 15 is a schematic cross-sectional view showing a display panel according to the third modification of the present disclosure. Detailed Description of the Invention

[0029] Hereinafter, embodiments of the present disclosure will be described in detail, and examples of the embodiments will be shown in the drawings. Throughout the description, the same or similar elements and elements having the same or similar functions are denoted by the same reference numerals. The embodiments described herein with reference to the drawings are illustrative and are intended to illustrate the present disclosure, but should not be construed as limiting the present disclosure.

[0030] Hereinafter, an electronic device according to an example of the present disclosure will be described. As Figure 1A and Figure 1B shown, an electronic device 1 according to an example of the present disclosure includes a display panel 2 and an imaging device 3 provided on the image side of the display panel 2.

[0031] For example, the display panel 2 includes a first light-emitting portion R that emits red light, a second light-emitting portion G that emits green light, and a third light-emitting portion B that emits blue light. The first light-emitting portion R, the second light-emitting portion G, and the third light-emitting portion B constitute pixels of the display panel 2. Hereinafter, the first light-emitting portion R, the second light-emitting portion G, and the third light-emitting portion B may be collectively referred to as light-emitting portions R, G, and B. For example, the light-emitting portions R, G, and B are arranged in a constant cycle.

[0032] The imaging device 3 is provided below the display panel 2 (i.e., Figure 1A and Figure 1B in the Z direction in). That is, the imaging device 3 is provided inside the electronic device 1. The imaging device 3 includes a lens group 31, an image sensor 32 having an imaging surface 321, and a housing 33 that houses the lens group 31 and the image sensor 32. The lens group 31 includes one or more lenses. The lens group 31 is disposed opposite to the display panel 2. The lens group 31 is held in a lens barrel (not shown). The imaging device 3 may include a mechanism that allows the lens group 31 to move in the optical axis direction (i.e., the Z direction) through a focusing mechanism such as a voice coil motor and a stepping motor to perform a focusing operation of focusing an image of an object on the imaging surface 321 of the image sensor 32. The image sensor 32 is constituted by a solid-state imaging device such as CMOS (Complementary Metal Oxide Semiconductor) or CCD (Charge Coupled Device), for example.

[0033] The imaging device 3 is disposed opposite to a certain area of the display panel 2. That is, as Figure 2 shown, the display panel 2 includes a first display area 201 disposed on the object side of the imaging device 3 and a second display area 202 other than the first display area 201. The first display area 201 may have the same structure as the second display area 202. For example, the sizes and arrangement periods of the light emitting portions R, G, and B (pixels) of the first display area 201 may be the same as those of the second display area 202. Since the first display area 201 and the second display area 202 have the same structure, the image quality of the image displayed in the first display area 201 can be kept equal to the image quality of the image displayed in the second display area 202. In addition, additional steps in the manufacturing process of the display panel 2 can be prevented.

[0034] Although Figure 2 an example in which the present disclosure is applied to a mobile phone is shown, the present disclosure can also be applied to electronic devices other than mobile phones, such as tablet terminals.

[0035] In addition, an optical filter may be disposed between the lens group 31 and the image sensor 32. The optical filter may be, for example, an IR cut-off filter (IRCF) that cuts off or absorbs infrared rays from the light incident from the lens group 31 side.

[0036] As Figure 1A shown, in the display state of the image, the electronic device 1 emits the light L1 forming the display image from the light emitting portions R, G, and B to the outside of the display panel 2.

[0037] On the other hand, as Figure 1B shown, the electronic device 1 activates the image sensor 32 in the imaging state. Then, the electronic device 1 captures the light L2 from the outside through the display panel 2 and images the captured light L2 on the image sensor 32 through the lens group 31 to image an object.

[0038] Next, the display panel 2 will be described in more detail.

[0039] As Figure 3 shown, the display panel 2 includes a substrate 21, light emitting portions R, G, and B, and a correction structure 24 for reducing diffracted light.

[0040] The substrate 21 includes a first surface 21a ( Figure 3 the upper surface in Figure 3 ) and a second surface 21b opposite to the first surface 21a (

[0041] the lower surface in

[0041] ). The first surface 21a and the second surface 21b are, for example, parallel planes to each other. The substrate 21 has optical transparency. The substrate 21 may be formed of a transparent material such as glass and resin.

[0041] The light-emitting portions R, G, and B are periodically provided on or above the first surface 21a of the substrate 21. That is, the light-emitting portions R, G, and B have a periodic structure. In Figure 3 In the illustrated example, the light-emitting portions R, G, and B are periodically arranged above the first surface 21a in the X direction along the first surface 21a. The light-emitting portions R, G, and B are also periodically arranged in the Y direction perpendicular to the X direction along the first surface 21a. Since the light-emitting portions R, G, and B are periodically arranged, a gap 23 is provided between adjacent light-emitting portions R, G, and B.

[0042] The light-emitting portions R, G, and B emit light L1 to the outside of the display panel 2 in the display state. Specifically, the first light-emitting portion R emits red light to the outside of the display panel 2. The second light-emitting portion G emits green light to the outside of the display panel 2. The third light-emitting portion B emits blue light to the outside of the display panel 2.

[0043] The light-emitting portions R, G, and B block light L2 from the outside of the display panel 2 in the imaging state. In the imaging state, the light L2 from the outside of the display panel 2 is brought to the imaging device 3 side through the gap 23 between adjacent light-emitting portions R, G, and B.

[0044] Each of the light-emitting portions R, G, and B sequentially includes a light-shielding portion 220 starting from the first surface 21a side, a first electrode 221 provided on the light-shielding portion 220, an organic layer 222 provided on the first electrode 221, and a second electrode 223 provided on the organic layer 222.

[0045] The light-shielding portion 220 blocks the light L2 from the outside of the display panel 2. The light-shielding portion 220 can be formed of a film containing a metal such as chromium (Cr), for example. The material is not limited to a metal. For example, the light-shielding portion 220 can be formed of a film containing a material other than a metal such as a black resin.

[0046] Note that when the first electrode 221 itself has light-shielding properties, the light-shielding portion 220 can be omitted.

[0047] The first electrode 221 is an anode that applies a positive voltage to the organic layer 222 to send holes to the organic layer 222. The first electrode 221 includes, for example, a transparent electrode made of indium tin oxide (ITO) or the like, and a reflective film provided on the first surface 21a side of the transparent electrode. By having the reflective film, the light-emitting portions R, G, and B can effectively perform top emission, in which the light emitted by the light-emitting portions R, G, and B is guided upward (in the +Z direction). Note that the reflective film in the first electrode 221 can have the same light-shielding property as the light-shielding portion 220 for blocking the light L2.

[0048] The second electrode 223 is a cathode that applies a negative voltage to the organic layer 222 and injects electrons into the organic layer 222. For example, the second electrode 223 can be formed by a layered structure of a metal and a transparent electrode on the metal. The thickness of the layered structure of the metal is thin enough to allow light to pass through.

[0049] Specific aspects of the first electrode 221 and the second electrode 223 are not limited to the above aspects. For example, the first electrode 221 can be formed of a metal, and the second electrode 223 can be formed of a transparent electrode.

[0050] The organic layer 222 includes a light-emitting layer. The organic layer 222 is formed of an organic material. For example, the organic layer 222 sequentially includes a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer starting from the first electrode 221 side. The hole injection layer is a layer for effectively extracting holes from the first electrode 221 (anode) and transporting them to the hole transport layer. The hole transport layer is a layer for effectively transporting holes to the light-emitting layer. The electron injection layer is a layer for effectively extracting electrons from the second electrode 223 (cathode) and transporting them to the electron transport layer. The electron transport layer is a layer for effectively transporting electrons to the light-emitting layer. The light-emitting layer is a layer where electrons and holes recombine to form an excited state, and the excited state transitions to the ground state to emit light.

[0051] In Figure 4 the example shown, a thin film transistor (TFT) 231 and a pixel defining layer 232 are provided in the gap 23 between adjacent light-emitting portions R, G, and B. The thin film transistor 231 is an element that drives the light-emitting portions R, G, and B with current. The thin film transistor 231 is connected to the first electrode 221 through wiring (not shown), for example. The thin film transistor 231 can include, for example, a driving transistor connected in series with the light-emitting portions R, G, and B, and a switching transistor connected to the gate of the driving transistor. A holding capacitor (capacitor) can be connected between the gate of the driving transistor and the switching transistor. The pixel defining layer 232 is a layer that separates adjacent light-emitting portions R, G, and B to divide the pixels composed of the light-emitting portions R, G, and B. The pixel defining layer 232 is formed of an insulating layer such as resin, for example. As Figure 4 shown, in addition to the thin film transistor 231 and the pixel defining layer 232, a scan line 233 and a data line 234 connected to the thin film transistor 231 are provided in the gap 23. The scan line 233 is a wiring for selecting the light-emitting portions R, G, and B to be driven by applying a gate voltage to the switching transistor to turn on the switching transistor, for example. The data line 234 is a wiring for driving the selected light-emitting portions R, G, and B by applying a gate voltage corresponding to display data to the driving transistor through the turned-on switching transistor, for example.

[0052] According to Figure 4With this configuration, the light-emitting units R, G, and B can be effectively driven by an active matrix system, where the thin-film transistors 231 are used to independently drive and control the respective light-emitting units R, G, and B.

[0053] As Figure 4 shown, when viewed from a direction perpendicular to the first surface 21a of the substrate 21, the outer shape of each of the light-emitting units R, G, and B has a first straight segment 22a, a second straight segment 22b extending in a direction intersecting the first straight segment 22a, and a curved segment 22c smoothly connecting the first straight segment 22a and the second straight segment 22b. By having such an outer shape, the light-emitting units R, G, and B can weaken the periodicity of the structures and gaps 23 of the light-emitting units R, G, and B. By weakening the periodicity of the structures of the light-emitting units R, G, and B and the gaps 23, the amount of diffracted light that causes imaging defects such as halos can be reduced.

[0054] To improve the image quality of the images captured by the imaging device 3, the light transmittance of the gap 23 is desirably 70% or more.

[0055] As Figure 3 shown, a correction structure 24 is provided between the first surface 21a of the substrate 21 and the light-emitting units R, G, and B. The correction structure 24 can be formed of a transparent material such as glass and plastic, for example. The correction structure 24 is configured to correct the diffracted light generated by the light L2 from outside the display panel 2 passing through the gap 23 between adjacent light-emitting units R, G, and B. The diffracted light propagates between the first surface 21a of the substrate 21 and the light-emitting units R, G, and B. By correcting the diffracted light, imaging defects such as halos caused by the diffracted light can be reduced. The diffracted light correction method will be explained in Figures 5 to 8 below.

[0056] A layer such as an insulating layer can be inserted between the correction structure 24 and the light-emitting units R, G, and B. In this case, from the viewpoint of correcting the diffracted light, it is desirable that the layer inserted between the correction structure 24 and the light-emitting units R, G, and B be as thin as possible.

[0057] In Figure 5 the example shown, the correction structure 24 corrects the propagation direction of the diffracted light L21 of higher than the first order so that it follows the direction of the zero-order light L20, which is a part of the light L2 from outside and passing through the gap 23. By correcting the propagation direction of the diffracted light L21 to follow the direction of the zero-order light L20, the diffracted light L21 with the corrected propagation direction can be imaged on the imaging surface 321 of the image sensor 32. This makes it possible to prevent the diffracted light L21 from causing halos and to more effectively utilize the corrected diffracted light to improve the image quality of the captured images.

[0058] More specifically, as Figure 5As shown, the correction structure 24 includes an incident surface 241 and an exit surface 242. Note that Figure 5 the thin film transistor 231 and the pixel defining layer 232 provided in the gap 23 are omitted.

[0059] The incident surface 241 is a surface that allows the diffracted light L21 to be incident on the correction structure 24, and corrects the wavefront W (i.e., the envelope surface) of the incident diffracted light L21 from a spherical surface to a planar surface. By correcting the wavefront W of the diffracted light L21 to a planar surface, the propagation direction of the diffracted light L21 after the wavefront W is corrected can be easily controlled.

[0060] In Figure 5 the example shown, the incident surface 241 is a convex surface whose cross-sectional shape protrudes in a direction opposite to the incident direction of the diffracted light L21. More specifically, in Figure 5 the example shown, the optical axis OA of the incident surface 241 as the convex surface is inclined with respect to the propagation direction of the zero-order light L20. The optical axis OA of the incident surface 241 is along the propagation direction of the diffracted light L21. The optical axis OA of the incident surface 241 can be parallel to the propagation direction of the first-order diffracted light. Since the incident surface 241 is an inclined convex surface, the wavefront W of the diffracted light L21 can be appropriately corrected to a planar surface with a simple configuration.

[0061] The radius of curvature of the incident surface 241 (convex surface) can be set based on the reference wavelength of the light L2 from the outside that is received by the imaging surface 321 after passing through the gap 23 and the lens group 31.

[0062] Specifically, the radius of curvature of the incident surface 241 satisfies the following formula (1) derived from the lens imaging formula.

[0063] r1 = (n – n0) / (n0 / a + n / b) (1).

[0064] In formula (1), r1 is the radius of curvature of the incident surface 241. n is the refractive index of the medium provided on the image side of the incident surface 241 to form the correction structure 24. n0 is the refractive index of the medium provided on the object side of the incident surface 241. a is the reference wavelength corresponding to the distance from the object point to the incident surface 241. b is the distance from the incident surface 241 to the imaging position of the diffracted light L21.

[0065] For example, the parameters of formula (1) can be Figure 6 the values shown in Figure 6In this case, the reference wavelength a is 0.0005876 [mm]. In order to make the wavefront W after incidence a plane, the distance b from the incident surface 241 to the imaging position of the diffracted light L21 is infinite (1E+16 [mm], that is, 1×1016 [mm]). The refractive index n0 of the medium on the object side of the incident surface 241 is 1. The refractive index n of the medium on the image side of the incident surface 241 is 1.54. In this case, according to formula (1), the radius of curvature r1 of the incident surface 241 is 317.3 [nm], that is, approximately 0.00032 [mm].

[0066] Since the incident surface 241 has a radius of curvature according to formula (1), the propagation direction of the diffracted light L21 can be appropriately controlled with a simple configuration.

[0067] The exit surface 242 is the surface from which the diffracted light L21 whose wavefront W has been corrected to a plane exits along the propagation direction of the zero-order light L20. By making the diffracted light L21 whose wavefront W has been corrected to a plane exit along the propagation direction of the zero-order light L20, the diffracted light L21 can be effectively used for imaging.

[0068] In Figure 7 the example shown, the normal N of the exit surface 242 is inclined with respect to the reference plane R perpendicular to the propagation direction of the zero-order light L20. Since the normal N of the exit surface 242 is inclined with respect to the reference plane R, the diffracted light L21 whose wavefront W has been corrected to a plane can exit appropriately along the propagation direction of the zero-order light L20. In addition, since the exit surface 242 is a uniformly flat inclined surface, it is easy to form the exit surface 242.

[0069] The inclination angle of the normal N of the exit surface 242 with respect to the reference plane R satisfies the following formula (2) derived from Snell's law.

[0070] n×sin(45°–θ’)=n’×sin(90°-θ’)(2)

[0071] In formula (2), n is the refractive index of the medium located on the incident side of the exit surface 242 and constituting the correction structure 24; θ’ is the inclination angle of the normal N of the exit surface 242 with respect to the reference plane R; n’ is the refractive index of the medium located on the exit side of the exit surface 242. The medium on the exit side of the exit surface 242 can be, for example, vacuum, air, or other medium in the gap between the first surface 21a of the substrate 21 and the correction structure 24.

[0072] For example, the parameters of formula (2) can adopt Figure 8 the values shown. As Figure 8As shown, when the refractive index n of the medium on the incident side of the exit surface 242 is 1.54 and the refractive index n' of the medium on the exit side is 1, according to formula (2), the inclination angle θ' of the normal N of the exit surface 242 with respect to the reference plane R is calculated to be 4.67°. Then, based on the obtained inclination angle θ' and Snell's law, as Figure 8 shown, the incident angle θ0 of the diffracted light L21 with respect to the normal N of the exit surface 242 is 40.33°, and the exit angle θ is 85.33°.

[0073] Since the exit surface 242 has a normal N inclination angle determined according to formula (2), the diffracted light L21 can be effectively utilized with a simple structure, reducing imaging defects and improving image quality.

[0074] In the electronic device 1 having the above structure, the light L2 externally incident on the display panel 2 is partially blocked by the light emitting parts R, G, B in the imaging state and partially transmitted through the gap 23. Among the external light L2 partially transmitted through the gap 23, a part directly irradiates the imaging surface 321 as the zero-order light L20, and the other part is diffracted into the diffracted light L21 and bypasses to the rear side of the light emitting parts R, G, B. The diffracted light L21 is incident on the correction structure 24 from the incident surface 241. At this time, the incident surface 241 changes the wavefront W of the diffracted light L21 from a spherical surface to a planar surface. The diffracted light L21 with the wavefront W changed to a planar surface propagates in the correction structure 24 and then exits from the exit surface 242 to the outside of the correction structure 24. At this time, the diffracted light L21 is refracted by the exit surface 242 to propagate along the propagation direction of the zero-order light L20 and exits. The diffracted light L21 exiting from the exit surface 242 is received by the imaging surface 321 and used to generate a captured image in the same way as the zero-order light L20.

[0075] On the other hand, in the display state, the electronic device 1 drives the light emitting parts R, G, B to emit light L1 to the outside of the display panel 2.

[0076] Here, conventional under-screen camera display panels adopt measures such as sparsely arranging pixels (i.e., light emitting parts R, G, B) above the camera, reducing pixel size to widen pixel gaps, and eliminating the periodicity of the gap structure to reduce halos. However, it is difficult to obtain good image quality with any of these measures, and it is also difficult to sufficiently reduce halos.

[0077] On the other hand, in the electronic device 1 according to the example of the present disclosure, the correction structure 24 can appropriately correct the propagation direction of the diffracted light L21 that bypasses to the rear side of the light emitting parts R, G, B. Therefore, imaging defects such as halos can be effectively reduced. In addition, without sparsely arranging or reducing the size of the light emitting parts R, G, B, and without eliminating the periodicity of the gap, the deterioration of the image quality of the displayed image can be prevented. That is, the electronic device 1 according to the example of the present disclosure can sufficiently reduce imaging defects while maintaining the image quality of the displayed image.

[0078] In addition, for the electronic device 1 according to the example of the present disclosure, since the correction structure 24 corrects the propagation direction of the diffracted light L21 to follow the propagation direction of the zero-order light L20, the diffracted light L21 can be effectively utilized for imaging, thereby improving the image quality of the displayed image.

[0079] It should be noted that the electronic device 1 is not limited to the above example, and various modifications shown below can be applied.

[0080] (First modification example)

[0081] For example, as Figure 9 shown, the exit surface 242 of the correction structure 24 can be a diffractive surface. More specifically, the exit surface 242 can have the shape of a diffractive surface of a blazed diffraction grating with a sawtooth cross-section. In this case, the thickness of the correction structure 24 can be reduced.

[0082] In Figure 9 the case of the exit surface 242 shown, by designing the angle of the exit surface 242 to maximize the diffraction efficiency in the propagation direction of the zero-order light L20, as Figure 5 shown, the propagation direction of the diffracted light L21 can be corrected to follow the propagation direction of the zero-order light L20. In addition, by gradually changing the interval and tilt angle of the diffraction grating periodic structure, the exit angle and convergence state of the diffracted light can be adjusted.

[0083] (Second modification example)

[0084] In addition, as Figure 10 shown, the correction structure 24 can correct the diffracted light L21 by capturing the diffracted light L21, rather than correcting the propagation direction of part or all of the diffracted light L21 to follow the propagation direction of the zero-order light L20.

[0085] Specifically, Figure 10 the correction structure 24 shown includes a reflection surface 243 that reflects the diffracted light L21. In Figure 10 the example shown, the reflection surface 243 is a surface perpendicular to the propagation direction of the zero-order light L20. However, for example, the reflection surface 243 can be tilted as Figure 11 shown.

[0086] The reflection surface 243 is, for example, a total reflection surface that totally reflects the diffracted light L21 incident from the inside at an incident angle greater than or equal to the critical angle. Since the reflection surface 243 is a total reflection surface, it can be formed at low cost. The reflection surface 243 is not limited to a total reflection surface, and can be, for example, a mirror surface. The mirror surface can be obtained by forming a metal film such as aluminum on the correction structure 24. In this case, the following formula (3) does not need to be satisfied.

[0087] By using the reflecting surface 243 to capture the diffracted light L21, imaging defects caused by the diffracted light L21 can be reduced.

[0088] An absorbing film that absorbs the diffracted light L21 reflected by the reflecting surface 243 can be formed on the correction structure 24. By forming the absorbing film, the diffracted light L21 reflected by the reflecting surface 243 can be prevented from becoming stray light.

[0089] In the second modification, the refractive index of the medium constituting the correction structure 24 having a total reflecting surface satisfies the following formula (3) derived based on Snell's law.

[0090] n≥n’×sin90° / sin45°(3).

[0091] In formula (3), n is the refractive index of the medium constituting the correction structure 24; n’ is the refractive index of the medium on the exit side of the correction structure 24.

[0092] For example, the parameters of formula (3) can be Figure 12 the values shown. In Figure 12 , the incident angle θ0 of the diffracted light L21 with respect to the reflecting surface 243 is 40.49°, the exit angle θ from the reflecting surface 243 is 90.00°, the inclination angle θ’ of the normal N of the reflecting surface 243 with respect to the reference plane R’ parallel to the propagation direction of the zero-order light L20 is 4.51°, and the refractive index n' of the medium on the exit side (i.e., the reflecting surface 243) of the correction structure 24 is 1. At this time, according to formula (3), the refractive index n of the medium constituting the correction structure 24 is calculated to be 1.54.

[0093] Since the medium constituting the correction structure 24 has a refractive index determined according to formula (3), the diffracted light L21 can be appropriately totally reflected.

[0094] Not limited to Figure 12 the example shown, the parameters of formula (3) can be Figure 14 the values shown, which correspond to Figure 13 the correction structure 24 shown. Different from Figure 12 , in Figure 14 , the refractive index n’ of the medium on the exit side of the correction structure 24 is 1.492. At this time, according to formula (3), the refractive index n of the medium constituting the correction structure 24 is calculated to be 1.54. In this case, when the inclination angle θ’ of the normal N of the reflecting surface 243 with respect to the reference plane R’ is set to -30.66°, the light L21 can be totally reflected.

[0095] (Third modification example)

[0096] Figure 15 is a schematic cross-sectional view of a display panel showing the third modification example of the present disclosure.

[0097] As Figure 15 shown, the display panel 2 may include a sealing layer 25 for sealing the light-emitting portions R, G, B over the light-emitting portions R, G, B and the gap 23.

[0098] In Figure 15 the example shown, the sealing layer 25 includes a vacuum gap layer 251 in contact with the light-emitting portions R, G, B and the gap 23, and a sealing substrate 252 provided on the vacuum gap layer 251.

[0099] By providing the sealing layer 25, the display panel 2 can protect the organic layers 222 of the light-emitting portions R, G, B from moisture.

[0100] In addition, in Figure 4 it, an example of the display panel 2 that drives the light-emitting portions R, G, B in an active matrix manner is described. The light-emitting portions R, G, B can also be driven in a passive matrix manner.

[0101] In addition, the planar shapes and wiring layouts of the light-emitting portions R, G, B are not limited to Figure 4 the example shown and can be variously changed.

[0102] In the description of the embodiments of the present disclosure, it should be understood that terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" should be interpreted as referring to the directions or positions described or shown in the accompanying drawings being discussed. These relative terms are only used to simplify the description of the present disclosure and do not indicate or imply that the device or element referred to must have a specific direction, nor does it mean that it must be constructed or operated in a specific direction. Therefore, these terms cannot be construed as limiting the present disclosure.

[0103] In addition, terms such as "first" and "second" used herein are only for descriptive purposes and do not mean to indicate or imply relative importance or significance, nor the number of the indicated technical features. Therefore, the features defined by "first" and "second" may include one or more of such features. In the description of the present disclosure, "a plurality" means two or more unless otherwise specified.

[0104] In the embodiments of the present disclosure, unless otherwise specified or limited, the use of terms such as "mounted", "connected", "coupled", etc. is broad and may be, for example, a fixed connection, a detachable connection, or an integral connection; it may also be a mechanical or electrical connection; it may also be a direct connection or an indirect connection through an intermediate structure; it may also be an internal communication between two elements, which can be understood by those skilled in the art according to the specific situation.

[0105] In embodiments of the present disclosure, unless otherwise specified or limited, the structure in which a first feature is "on" or "under" a second feature may include embodiments in which the first feature is in direct contact with the second feature, and may also include embodiments in which the first feature and the second feature are not in direct contact but in contact through an intermediate feature. In addition, the first feature being "on", "above", or "at the top of" may include that the first feature is exactly or obliquely "on", "above", or "at the top of" the second feature, or may simply mean that the height of the first feature is higher than the height of the second feature; while the first feature being "under", "beneath", or "at the bottom of" may include that the first feature is exactly or obliquely "under", "beneath", or "at the bottom of" the second feature, or may simply mean that the height of the first feature is lower than the height of the second feature.

[0106] The various embodiments and examples of the present disclosure provide ways to implement different structures of the present disclosure. To simplify the present disclosure, certain elements and arrangements have been described above. However, these elements and arrangements are only examples and are not intended to limit the present disclosure. In addition, reference numerals and / or reference letters may be repeated in different examples of the present disclosure. This repetition is for simplicity and clarity and does not denote a relationship between different embodiments and / or arrangements. In addition, the present disclosure provides examples of different processes and materials. However, those skilled in the art should understand that other processes and / or materials may also be applied.

[0107] In this specification, whenever reference is made to "an embodiment", "some embodiments", or "exemplary embodiments", "an example", "a specific example", or "some examples", it means that a specific feature, structure, material, or characteristic related to the embodiment or example is included in at least one implementation or example of the present disclosure. Therefore, the appearance of the above phrases throughout this specification does not necessarily refer to the same embodiment or example of the present disclosure. In addition, in one or more embodiments or examples, the specific features, structures, materials, or characteristics may be combined in any suitable manner.

[0108] Any process or method described in the flowchart or otherwise described herein may be understood to include one or more modules, segments, or portions of code for executable instructions for implementing specific logical functions or steps in the process, and the scope of the preferred embodiments of the present disclosure includes other implementations, where those skilled in the art should understand that the functions may be implemented in a sequence other than the shown or discussed sequence, including in substantially the same sequence or the reverse sequence.

[0109] The logic and / or steps described herein in other ways or shown in the flowchart, for example, a specific sequence list of executable instructions for implementing a logical function, can be specifically implemented in any computer-readable medium used by an instruction execution system, device, or apparatus (such as a computer-based system that includes a processor or other system capable of obtaining and executing instructions from the instruction execution system and device), or used in combination with the instruction execution system, device, and apparatus. As for the specification, "computer-readable medium" can be any device suitable for including, storing, communicating, propagating, or transmitting a program that will be used by or in combination with the instruction execution system, device, or apparatus. More specific examples of computer-readable media include, but are not limited to: an electronic connection (electronic device) having one or more wires, a portable computer housing (magnetic device), random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer-readable medium can even be paper or other suitable media on which a program can be printed, because, for example, the paper or other suitable media can be optically scanned and then, if necessary, edited, decrypted, or processed by other suitable methods to obtain the program electronically, and then the program can be stored in a computer memory.

[0110] It should be understood that each part of the present disclosure can be implemented by hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by an appropriate instruction execution system. For example, if implemented by hardware, in another embodiment, the steps or methods can be implemented by one or a combination of the following techniques known in the art: discrete logic circuits having logic gate circuits for implementing the logical functions of data signals, application-specific integrated circuits having appropriate combinational logic gate circuits, programmable gate arrays (PGAs), field programmable gate arrays (FPGAs), etc.

[0111] Those skilled in the art should understand that all or part of the steps of the example methods of the present disclosure can be implemented by using program commands to relevant hardware. The program can be stored in a computer-readable storage medium, and when running on a computer, the program includes a combination of the steps in the method embodiments of the present disclosure.

[0112] In addition, each functional unit of the present disclosure can be integrated in a processing module, or these units can exist separately physically, or two or more units can be integrated in a processing module. The integrated module can be implemented in the form of hardware or a software functional module. When the integrated module is implemented in the form of a software functional module and sold or used as an independent product, the integrated module can be stored in a computer-readable storage medium.

[0113] The storage media mentioned above may be a read-only memory, a magnetic disk, a CD, etc.

[0114] Although embodiments of the present disclosure have been shown and described, those skilled in the art should understand that these embodiments are illustrative and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions, and variations can be made to the embodiments without departing from the scope of the present disclosure.

Claims

1. A display panel, characterized in that, Comprising: A substrate, the substrate including a first surface and a second surface opposite to the first surface, the substrate being optically transparent; A plurality of light-emitting portions, the plurality of light-emitting portions being periodically arranged on or above the first surface, the light-emitting portions emitting light to the outside of the display panel and blocking light from the outside of the display panel; A correction structure, the correction structure being disposed between the first surface and the plurality of light-emitting portions, the correction structure being configured to correct diffracted light generated by light from the outside of the display panel passing through a gap between adjacent light-emitting portions, the diffracted light being generated to bypass between the first surface and the plurality of light-emitting portions.

2. The display panel according to claim 1, wherein The correction structure corrects the propagation direction of the diffracted light to be consistent with the propagation direction of the zero-order light in the external light passing through the gap.

3. The display panel according to claim 1, wherein The correction structure corrects the diffracted light by capturing the diffracted light.

4. The display panel according to claim 2, wherein The correction structure includes an incident surface, and the incident surface corrects the wavefront of the diffracted light from a spherical surface to a plane surface.

5. The display panel according to claim 4, wherein The incident surface is a convex surface protruding in a direction opposite to the incident direction of the diffracted light.

6. The display panel according to claim 5, characterized in that, The optical axis of the incident surface is inclined with respect to the propagation direction of the zero-order light.

7. The display panel according to claim 5, wherein The radius of curvature of the incident surface is set based on a reference wavelength of light from the outside of the display panel received by an imaging surface after passing through the gap.

8. The display panel according to claim 7, wherein The radius of curvature of the convex surface is configured such that: r1 = (n – n0) / (n0 / a + n / b), where r1 is the radius of curvature of the incident surface, n is the refractive index of the medium provided on the image side of the incident surface to form the correction structure, n0 is the refractive index of the medium provided on the object side of the incident surface, a is the reference wavelength corresponding to the distance from the object point to the incident surface, and b is the distance from the incident surface to the imaging position of the diffracted light.

9. The display panel according to claim 4, wherein, The correction structure includes an exit surface, and the exit surface emits the diffracted light in the propagation direction of the zero-order light, and the wavefront of the diffracted light is corrected to a plane surface.

10. The display panel according to claim 9, wherein The normal of the exit surface is inclined with respect to a reference plane perpendicular to the propagation direction of the zero-order light.

11. The display panel according to claim 10, wherein The exit surface is an inclined plane.

12. The display panel according to claim 10, wherein The exit surface is a diffractive surface.

13. The display panel according to claim 10, wherein The inclination angle of the normal of the exit surface with respect to the reference plane is configured such that: n × sin(45° – θ’) = n’ × sin(90° - θ’), where n is the refractive index of the medium provided on the incident side of the exit surface to form the correction structure, θ’ is the inclination angle of the normal of the exit surface with respect to the reference plane, and n’ is the refractive index of the medium provided on the exit side of the exit surface.

14. The display panel according to claim 13, wherein The correction structure includes a reflective surface that reflects the diffracted light.

15. The display panel according to claim 14, wherein The refractive index of the medium forming the correction structure is configured such that: n ≥ n’ × sin90° / sin45°, where n is the refractive index of the medium forming the correction structure, and n’ is the refractive index of the medium provided on the exit side of the correction structure.

16. The display panel according to claim 1, wherein Each of the light-emitting portions includes: A light-shielding portion for shielding light from the outside of the display panel; A first electrode, the first electrode being disposed on the light-shielding portion; An organic layer, the organic layer being disposed on the first electrode and including a light-emitting layer; and A second electrode, the second electrode being disposed on the organic layer.

17. The display panel according to claim 1, wherein When the light-emitting portion is viewed from a direction perpendicular to the first surface, the outer shape of each light-emitting portion has a first straight segment, a second straight segment extending in a direction intersecting the first straight segment, and a curved segment smoothly connecting the first straight segment and the second straight segment.

18. The display panel according to claim 1, wherein The light transmittance of the gap is 70% or higher.

19. The display panel according to claim 1, wherein The gap includes at least one of the following: A thin-film transistor for driving the light-emitting portion, A scanning line connected to the thin-film transistor and selecting the light-emitting portion to be driven, A data line connected to the thin-film transistor and driving the selected light-emitting portion according to display data, and A pixel defining layer defining a pixel composed of the light-emitting portion.

20. The display panel according to claim 1, wherein, Further includes a sealing layer disposed on the light-emitting portion and the gap.

21. The display panel according to claim 20, wherein The sealing layer includes: A vacuum gap layer, the vacuum gap layer being in contact with the light-emitting portion and the gap; A sealing substrate, the sealing substrate being disposed on the vacuum gap layer.

22. An electronic device, characterized in that, Includes: The display panel and the imaging device according to any one of claims 1 to 21, the imaging device being disposed on the image side of the display panel.

23. The electronic device according to claim 22, wherein The display panel includes a first display area disposed on the object side of the imaging device and a second display area other than the first display area.

24. The electronic device according to claim 23, wherein The first display area and the second display area have the same structure.

Images