CN112103320A - Display panel and display device - Google Patents
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/50—OLEDs integrated with light modulating elements, e.g. with electrochromic elements, photochromic elements or liquid crystal elements
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B29/00—Combinations of cameras, projectors or photographic printing apparatus with non-photographic non-optical apparatus, e.g. clocks or weapons; Cameras having the shape of other objects
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
Abstract
The utility model provides a display panel and display device, this display panel includes display substrate and light control component, display substrate has first light transmission area and the second area adjacent with first light transmission area, the light transmissivity in first light transmission area is greater than the light transmissivity with the second area, display substrate includes a plurality of luminescent device, light control component is located display substrate's light-emitting side, and in the second area, light control component sets up to make the light that luminescent device sent assemble to first light transmission area. The light control element can improve the display function of the first light-transmitting area.
Description
Technical Field
At least one embodiment of the present disclosure relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
With the development and progress of the society, the application of electronic display products is more and more extensive, and the requirement of users on the display effect of the electronic display products is higher and higher. The current electronic display products are usually provided with a camera device to have more auxiliary functions. Under this demand, the under-screen camera technology stands out by making the on-screen display have a high occupancy ratio. However, it is difficult for an electronic device using the current under-screen camera technology to have a high light transmittance design while having a display function in an imaging area.
Disclosure of Invention
In view of the above, embodiments of the present disclosure provide a display panel and a display device, which can solve the above technical problems.
Embodiments of the present disclosure provide a display panel including a display substrate and a light control element. The display substrate has a first light-transmitting region and a second region adjacent to the first light-transmitting region, the first light-transmitting region having a light transmittance greater than that of the second region, the display substrate including a plurality of light-emitting devices. The light control element is positioned on the light-emitting side of the display substrate. In the second region, the light control element is arranged to converge the light emitted by the light emitting device toward the first light-transmitting region.
The light control element may guide light emitted from the light emitting device around the first light transmission region to the first light transmission region, thereby enabling the first light transmission region to have a display function or improving a display effect (e.g., improving resolution) of the first light transmission region. In this way, the display effect of the first light transmission region is improved regardless of the structure of the first light transmission region, and the first light transmission region can have high light transmittance while displaying a high-resolution image.
For example, in a display panel provided in an embodiment of the present disclosure, a light control element includes a first light-transmitting structure and a second light-transmitting structure. The first light-transmitting structure is provided with a groove, and at least part of the side wall of the groove is an inclined plane. The second light-transmitting structure fills the groove. The refractive index of the first light-transmitting structure is different from that of the second light-transmitting structure, and the orthographic projection of the groove on the plane of the display substrate is at least partially overlapped with the orthographic projection of the first light-transmitting area on the plane of the display substrate.
The refracting index of inclined plane both sides medium is different, and the emergent light of luminescent device can not inject the inclined plane perpendicularly into moreover, and promptly, this light can take place the refraction when seeing through the inclined plane, and the direction of light changes, in view of the above, through the degree of inclination that sets up the inclined plane and the refracting index of first light transmission structure and the refracting index relation of second light transmission structure, can control refraction angle and refraction light's direction to can be with the first light transmission region of refraction light directive.
Further, the orthographic projection of the inclined plane on the plane of the display substrate is positioned outside the orthographic projection of the first light-transmitting area on the plane of the display substrate. Therefore, the side wall of the groove can not refract the external light (the light for shooting) passing through the first light-transmitting area, and the shooting quality is ensured.
For example, in the display panel provided in the embodiment of the present disclosure, the slope is set such that a width of an end of the groove facing the display substrate is smaller or larger than a width of an end facing away from the display substrate, and a refractive index of the first light-transmitting structure is smaller than a refractive index of the second light-transmitting structure.
For example, in a display panel provided by an embodiment of the present disclosure, the slope includes a flat surface; and/or the bevel comprises a curved surface. Further, the plane is configured to include a plurality of sub-planes which are sequentially connected and whose inclination degrees are sequentially increased or decreased.
For example, in the display panel provided in the embodiment of the present disclosure, at least one of the first light-transmitting structure and the second light-transmitting structure is an integrated structure; or at least one of the first light-transmitting structure and the second light-transmitting structure is a laminate composed of a plurality of film layers. Further, in the case where at least one of the first light-transmitting structure and the second light-transmitting structure is a laminate composed of a plurality of film layers, the refractive indices of the respective film layers are different.
For example, in the display panel provided in the embodiment of the present disclosure, in a case that the slope is set such that a width of an end of the groove facing the display substrate is smaller than a width of an end of the groove facing away from the display substrate, the first light-transmitting structure is set to include a plurality of first film layers, and refractive indexes of the plurality of first film layers sequentially increase in a direction from the display substrate to the light ray control element; and/or the second light-transmitting structure is arranged to comprise a plurality of second film layers, and the refractive indexes of the second film layers are sequentially reduced from the display substrate to the light ray control element.
For example, in the display panel provided in the embodiment of the present disclosure, in a case where the slope is set such that a width of an end of the groove facing the display substrate is greater than a width of an end of the groove facing away from the display substrate, the first light-transmitting structure is set to include a plurality of first film layers, and refractive indexes of the plurality of first film layers are sequentially reduced in a direction from the display substrate to the light ray control element; and/or the second light-transmitting structure is arranged to comprise a plurality of second film layers, and the refractive indexes of the second film layers are sequentially increased from the display substrate to the light ray control element.
For example, in the display panel provided by the embodiment of the present disclosure, the arrangement density of the light emitting devices located within the orthographic projection of the inclined plane on the plane of the display substrate is greater than that of the light emitting devices in other regions.
The light emitted by a part of the light emitting devices in the area where the inclined plane is located is emitted out of the display panel from the first light transmission area, and the arrangement density of the light emitting devices in the area is increased, so that the number of the light emitting devices of which the emergent light can be emitted into the first light transmission area can be increased, and the resolution of the display image in the first light transmission area is improved; on the other hand, it is advantageous that each region of the display area emits light uniformly (for example, in the case of full white display), and the contrast of the display image is improved.
For example, in a display panel provided by an embodiment of the present disclosure, the light control element is configured as an organic encapsulation layer; or the display panel comprises an encapsulation layer, and the light control element is positioned on one side of the encapsulation layer, which is far away from the display substrate.
Under the condition that the light control element is configured to be the organic packaging layer, compared with the current display panel, the thickness of the display panel cannot be increased by arranging the light control element, and the light and thin design of the display panel is facilitated.
Embodiments of the present disclosure provide a display device comprising a camera and a display panel as in the above embodiments, wherein an orthographic projection of the camera on the display panel at least partially overlaps the first light transmissive region.
In the display panel and the display device provided by the embodiment of the disclosure, the light control element may direct light emitted from the light emitting device around the first light transmission region to the first light transmission region, so that the first light transmission region has a display function or the display effect (e.g., resolution) of the first light transmission region is improved.
Drawings
Fig. 1 is a schematic plan view illustrating a display panel according to an embodiment of the present disclosure;
FIG. 2 is a cross-sectional view of the display panel shown in FIG. 1 taken along M-N;
fig. 3 is a schematic cross-sectional view of a partial area of a display panel according to an embodiment of the disclosure;
fig. 4 is a schematic cross-sectional view of a partial area of a display panel according to an embodiment of the present disclosure;
fig. 5 is a schematic cross-sectional view of a partial area of a display panel according to an embodiment of the disclosure;
fig. 6 is a schematic cross-sectional view of a partial area of a display panel according to an embodiment of the present disclosure;
fig. 7 is a schematic cross-sectional view of a partial area of a display panel according to an embodiment of the disclosure;
fig. 8 is a schematic cross-sectional view of a partial area of a display panel according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a display device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the display panel adopting the under-screen camera technology, in the camera shooting area corresponding to the camera, the light transmittance can be improved by not setting pixels or by reducing the pixel density, increasing the pixel pitch and the like, so as to ensure the camera shooting quality, but in this case, the camera shooting area can lose the display function or can only display low-resolution images, otherwise, if the pixels are set in the camera shooting area or the display function is improved by increasing the pixel density, reducing the pixel pitch and the like, the light transmittance of the camera shooting area can be reduced, so as to reduce the camera shooting quality.
Embodiments of the present disclosure provide a display panel and a display device, which may solve the above technical problems. The display panel includes a display substrate and a light control element. The display substrate has a first light-transmitting region and a second region adjacent to the first light-transmitting region, the first light-transmitting region having a light transmittance greater than that of the second region, the display substrate including a plurality of light-emitting devices. The light control element is positioned on the light-emitting side of the display substrate. In the second region, the light control element is arranged to converge the light emitted by the light emitting device toward the first light-transmitting region. The light control element may guide light emitted from the light emitting device around the first light transmission region to the first light transmission region, thereby enabling the first light transmission region to have a display function or improving a display effect (e.g., improving resolution) of the first light transmission region. In this way, the display effect of the first light transmission region is improved regardless of the structure of the first light transmission region, and the first light transmission region can have high light transmittance while displaying a high-resolution image.
It should be noted that, in the embodiments of the present disclosure, the display substrate may include a display array layer, and the display array layer includes light emitting devices arranged in an array.
Hereinafter, a display panel and a display device according to at least one embodiment of the present disclosure will be described in detail with reference to the accompanying drawings. In these drawings, a spatial rectangular coordinate system is established with reference to a plane on which a display substrate is located (a plane on which a display panel is located), so as to explain positions of respective structures in the display panel. In the rectangular space coordinate system, the X axis and the Y axis are parallel to the plane of the display substrate, and the Z axis is perpendicular to the plane of the display substrate.
As shown in fig. 1 and 2, the display panel 10 includes a display substrate (the display array layer 100 included therein is shown in fig. 1 and 2) and a light control element 200. The display array layer 100 includes a plurality of light emitting devices 110. The light control element 200 is located on the light exit side of the display array layer 100. The display substrate includes a display region 11, the display region 11 includes a first light transmission region 12 and a second region 13 adjacent to the first light transmission region 12, and in the second region 13, the light control element 200 is disposed such that light emitted from the light emitting device 110 is converged toward the first light transmission region 12. In this way, at least a part of the light emitted from the light emitting device 110 in the first light transmissive region 12 can enter the first light transmissive region 12 and then exit the display panel, and for human eyes, the part of the light comes from the first light transmissive region 12. In this way, even if the light emitting device 110 is not provided in the first light transmission region 12, the first light transmission region 12 of the display panel 10 has a display function for human eyes.
In the embodiment of the present disclosure, as shown in fig. 2, if light emitted from the light emitting device 110 outside the first light transmission region 12 exits through the first light transmission region 12 and then enters the human eye, the position of the light emitting device 110 is projected to the first light transmission region 12 for the human eye, and here, the light emitting device 110 observed by the human eye is set as a "dummy light emitting device".
It should be noted that, in the embodiment of the present disclosure, the position of the first light-transmitting area in the display area is not limited, and the first light-transmitting area may be close to the edge of the display area as shown in fig. 1, or directly located at the edge of the display area, or may also be located in the middle of the display area or at another position.
For example, in a display panel provided in an embodiment of the present disclosure, a light control element includes a first light-transmitting structure and a second light-transmitting structure. The first light-transmitting structure is provided with a groove, and at least part of the side wall of the groove is an inclined plane. The second light-transmitting structure fills the groove. The refractive index of the first light-transmitting structure is different from that of the second light-transmitting structure, and the orthographic projection of the groove on the plane of the display substrate is at least partially overlapped with the orthographic projection of the first light-transmitting area on the plane of the display substrate. So, the refracting index of inclined plane both sides medium is different, and the light of luminescent device outgoing can not inject the inclined plane perpendicularly into moreover, promptly, this light can take place the refraction when seeing through the inclined plane, and the direction of light changes, in view of the above, through the degree of slope that sets up the inclined plane, can also be through the refracting index of the first light transmission structure of design and the refracting index relation of second light transmission structure, can control refraction angle and refraction light's direction to can make refraction light directive first light transmission region.
Illustratively, as shown in fig. 3, the light control element 200 includes a first light-transmitting structure 210 and a second light-transmitting structure 220, the first light-transmitting structure 210 is provided with a groove 2110, the sidewall of the groove 2110 is an inclined surface, and the second light-transmitting structure 220 fills the groove 2110 so as to cover the sidewall of the groove 2110. The refractive index of the first light-transmitting structure 210 is different from the refractive index of the second light-transmitting structure 220.
For example, as shown in fig. 3, an orthogonal projection of the first light-transmitting region 12 on the plane of the display array layer 200 is located within an orthogonal projection of the groove 2110 on the plane of the display array layer 100, so that the groove 2110 may correspond to the first light-transmitting region 12. For example, the orthographic projection of the side wall of the groove 2110 on the plane of the display array layer 100 is located outside the orthographic projection of the first light-transmitting area 12 on the plane of the display array layer 100, so that the side wall (inclined plane) of the groove 2110 does not refract the external light used for image pickup, and the quality of image pickup is ensured.
In the embodiments of the present disclosure, the "inclined plane" means a "inclined plane," which may be a plane or a curved surface, and the like, and the "inclination" is relative to the plane of the display panel (the plane of the display substrate). For example, taking the inclined plane as a plane, the greater the inclination of the plane, the more the plane tends to be perpendicular to the plane of the display substrate, and conversely, the smaller the inclination of the plane, the more the plane tends to be parallel to the plane of the display substrate.
For example, in the display panel provided in the embodiment of the present disclosure, the slope is set such that a width of an end of the groove facing the display substrate is smaller or larger than a width of an end facing away from the display substrate, and a refractive index of the first light-transmitting structure is smaller than a refractive index of the second light-transmitting structure.
Illustratively, as shown in fig. 3, the width of the end of the groove 2110 facing the display substrate (e.g., the display array layer 100 it comprises) is smaller than the width of the end of the groove 2110 facing away from the display array layer 100. In this way, in the case that the refractive index of the first light transmission structure 210 is smaller than the refractive index of the second light transmission structure 220, when the light emitted from the light emitting device 110 passes through the inclined plane of the groove 2110, in order to enter the optically dense medium from the optically thinner medium, the refraction angle is smaller than the incident angle, and thus the refracted light is emitted to the first light transmission region 12.
Illustratively, as shown in fig. 4, the width of the end of the groove 2110a facing the display array layer 100 is greater than the width of the end of the groove 2110a facing away from the display array layer 100. In this way, in the case that the refractive index of the first light transmission structure 210a is smaller than the refractive index of the second light transmission structure 220a, when the light emitted from the light emitting device 110 passes through the inclined plane of the groove 2110a, the refraction angle is larger than the incident angle in order to enter the optically thinner medium from the optically denser medium, and thus the refracted light is emitted to the first light transmission region 12.
For example, in the display panel provided in the embodiment of the present disclosure, the side wall (slope) of the groove may be provided as a flat surface, or may be provided as a curved surface, or may be provided to include both a flat surface and a curved surface. In the case where the inclined plane is a plane, the structure of the display panel may be referred to fig. 3, 4, and 6, and in the case where the inclined plane is a curved surface, the structure of the display panel may be referred to fig. 5. Next, the structure of the display panel will be described in the case where the inclined surface of the groove is a flat surface and a curved surface, respectively.
As shown in fig. 5, the inclined surface (side wall) of the groove 2110b is curved, so that the incident angle and, accordingly, the refraction angle of the light emitted from the light emitting device 110 are different at different positions of the curved surface, i.e., the direction of the emitted light is also different, thereby facilitating the adjustment of the position of each dummy light emitting device. Compared to the case where the inclined surface is a plane (regardless of the case where the first light transmission structure and/or the second light transmission structure is formed of a plurality of film layers having different refractive indexes in the following embodiments), the pitch of the light emitting devices 110 and the pitch of the corresponding dummy light emitting devices corresponding to the inclined surface having a curved shape may be different, which is advantageous in that the dummy light emitting devices in the first light transmission region 12 and the second region 13 are uniformly arranged, and the size of the second region 13 may not be limited.
For example, in one example of the present disclosure, as shown in fig. 5, in a case that the slope (sidewall) of the groove 2110b is a curved surface, and the slope makes the width of the end of the groove 2110b facing the display array layer 100 smaller than the width of the end of the groove 2110b facing away from the display array layer display substrate 100, the curved surface is concave to the side of the second light-transmitting structure 220b, that is, the sidewall of the groove 2110b appears convex.
For example, in another example of the present disclosure, in a case where an inclined surface (side wall) of the groove is a curved surface, and the inclined surface makes a width of an end of the groove facing the display substrate larger than a width of an end of the groove facing away from the display substrate, the curved surface is recessed to the second light-transmitting structure side, that is, the side wall of the groove also appears convex.
It should be noted that, in the embodiments of the present disclosure, the specific shape of the curved surface is not limited as long as it can satisfy the requirements in the foregoing embodiments. For example, in some embodiments of the present disclosure, the curved surface is provided as a smooth surface, as shown in fig. 6. For example, the smooth surface may be an arc surface, or may be a part of an ellipsoid surface, a paraboloid surface, or the like.
For example, in other embodiments of the present disclosure, the inclined surface is provided as a plane, and the plane includes a plurality of sub-planes which are sequentially connected and whose inclination degrees are sequentially increased or decreased. Illustratively, as shown in FIG. 6, the side wall (slope) of the groove 2110c is formed by a plurality of sub-planes connected in series, the boundaries of which are defined by dashed lines L1-L4, respectively. For example, each sub-plane corresponds to at least one light emitting device 110, i.e. an orthographic projection of each sub-plane onto the plane of the display array layer 100 covers at least one light emitting device 110. Thus, for each light emitting device 110, the refraction direction of the light emitted by the light emitting device after passing through the inclined plane is the same, so that the light is accurately projected at the position where the corresponding dummy light emitting device is located, which is beneficial to improving the definition of the displayed image.
For example, in the case where the side wall (slope) of the groove is provided to include a plurality of sequentially connected sub-planes, if the slope is such that the width of the end of the groove facing the display substrate is smaller than the width of the end of the groove facing away from the display substrate, the inclination degrees of the plurality of sub-planes are sequentially reduced from the side of the light ray control element facing the display substrate to the side facing away from the display substrate; if the inclined surface makes the width of the end of the groove facing the display substrate larger than the width of the end of the groove facing away from the display substrate, the inclination degree of the plurality of sub-planes increases in sequence from the side of the light ray control element facing the display substrate to the side facing away from the display substrate.
In the embodiment of the present disclosure, the forming manner of the groove is not limited, and the groove may be designed according to an actual process. For example, the shape of the sidewall of the groove may be defined by one film layer or a stack of a plurality of film layers, and accordingly, the first light-transmitting structure and the second light-transmitting structure may be respectively provided as an integrated structure or as a stack of a plurality of film layers. In embodiments of the present disclosure, "unitary structure" means one or more structures formed from one film layer. For example, the first light-transmitting structure provided as the integrated structure may be formed by a patterning process of one film layer.
For example, some embodiments of the present disclosure provide a display panel in which at least one of the first light-transmitting structure and the second light-transmitting structure is a unitary structure. In this case, the groove may be formed by a one-time patterning process such as photolithography, hot stamping, or the like.
For example, as shown in fig. 4, the second light transmission structure 220a may be formed by depositing a film layer and performing a patterning process, a surface shape of the second light transmission structure 220a defining a shape of a pre-formed groove, and then depositing the film layer to form the first light transmission structure 210 a.
For example, as shown in fig. 5, the groove 2110b may be filled with the second light-transmitting structure 220b by depositing a film and performing a patterning process to form the first light-transmitting structure 210b having the groove 2110b, and then depositing the film to form the second light-transmitting structure 220 b.
For example, in some embodiments of the present disclosure, a display panel is provided, in which at least one of the first light-transmitting structure and the second light-transmitting structure is a stack of a plurality of film layers. In this case, the patterning process may be performed separately for each film layer to define the sidewalls of the recess in a stacked manner, which reduces the difficulty of the patterning process.
For example, in one example, as shown in fig. 3, a plurality of film layers demarcated by dotted lines L1-L4 are sequentially formed, wherein a patterning process is performed on a previous film layer before a next film layer is formed, and the plurality of film layers after the patterning process is performed form the first light-transmitting structure 210 having the groove 2110. Then, film layers are deposited to form the second light-transmitting structure 220, the second light-transmitting structure 220 fills the groove 2110, and the second light-transmitting structure 220 may be a unitary structure or may be a laminate formed of a plurality of film layers.
For example, in another example, the second light-transmitting structure may be formed by sequentially stacking a plurality of film layers, wherein a patterning process is performed on a previous film layer before a next film layer is formed, and the plurality of film layers define the shape of the groove to be formed after the patterning process is performed. Then, a film layer is deposited to form a first light-transmitting structure, and the first light-transmitting structure and the second light-transmitting structure are contacted to define a groove. The shape of the recess to be formed in this example can be seen in fig. 4.
For example, in at least one embodiment of the present disclosure, in the case where the first light-transmitting structure and/or the second light-transmitting structure is provided as a stack of a plurality of film layers, refractive indices of the respective film layers are different. In this way, the refractive index relationship (for example, the refractive index difference) of the medium on both sides of the inclined surface (sidewall) of the groove is different at different film layers, so that the position of each dummy light emitting device can be further adjusted even when the shape and size of the groove are fixed.
For example, in one example of the present disclosure, referring back to fig. 3, the slope (sidewalls) of the groove is a plane, and the first light transmissive structure 210 is composed of a plurality of film layers demarcated by a dotted line L1-L4, the film layers having different refractive indices. Thus, even though the incident angles of the light emitted from the light emitting devices 110 are the same, the refraction angles are different at a plurality of positions of the inclined surface corresponding to the respective film layers, thereby facilitating the adjustment of the position of each dummy light emitting device. For example, in this example, further, the second light-transmitting structure 220 may also be configured by a plurality of film layers demarcated by dotted lines L1-L4, or, alternatively, only the second light-transmitting structure 220 may be configured by a plurality of film layers with different refractive indexes demarcated by dotted lines L1-L4.
For example, in another example of the present disclosure, referring back to fig. 6, the slope (sidewall) of the groove is a plane, and the first light transmissive structure 210c is composed of a plurality of film layers demarcated by a dotted line L1-L4, the refractive indices of which are different. In combination with the aforementioned embodiment in which the sidewall (slope) of the groove 2110c is formed by sequentially connecting a plurality of sub-planes, the sidewall of each film layer defining the groove 2110c serves as the sub-plane. As such, further adjustment of the position of each dummy light emitting device may be facilitated.
For example, in the display panel provided in the embodiment of the present disclosure, in a case where the first light-transmitting structure and/or the second light-transmitting structure is formed by a plurality of film layers having different refractive indexes, if the inclined plane (sidewall) of the groove is set such that the width of the end of the groove facing the display substrate is smaller than the width of the end of the groove facing away from the display substrate, the plurality of film layers in the first light-transmitting structure are a plurality of first film layers, and the refractive indexes of the plurality of first film layers sequentially increase in a direction from the display substrate to the light ray control element; and/or the plurality of film layers in the second light-transmitting structure are a plurality of second film layers, and the refractive indexes of the plurality of second film layers are sequentially reduced from the display substrate to the light ray control element. In this embodiment, the slope may be a flat surface, or may be a curved surface.
For example, in the display panel provided in the embodiment of the present disclosure, in a case where the first light-transmitting structure and/or the second light-transmitting structure is configured by a plurality of film layers having different refractive indexes, if the inclined surface (sidewall) of the groove is set such that the width of the end of the groove facing the display substrate is larger than the width of the end of the groove facing away from the display substrate, the plurality of film layers in the first light-transmitting structure are the plurality of first film layers, and the refractive indexes of the plurality of first film layers are sequentially decreased in a direction from the display substrate to the light ray control element; and/or the plurality of film layers in the second light-transmitting structure are a plurality of second film layers, and the refractive indexes of the plurality of second film layers are sequentially increased from the display substrate to the light ray control element. In this embodiment, the slope may be a flat surface, or may be a curved surface.
It should be noted that, in the embodiments of the present disclosure, the second light-transmitting structure may be completely or partially filled in the groove of the first light-transmitting structure, and the first light-transmitting structure is disposed to cover the second light-transmitting structure or the second light-transmitting structure is disposed to cover the first light-transmitting structure.
For example, in one example of the disclosure, as shown in fig. 7, the slope (sidewall) of the groove 2110d is set such that the width of the end of the groove 2110d facing the display substrate (e.g., the display array layer 100 included therein) is greater than the width of the end facing away from the display array layer 100, in this case, the first light-transmitting structure 210d having the groove 2110d may be formed first, and then the second light-transmitting structure 220d covering the first light-transmitting structure 210d is formed, a portion of the second light-transmitting structure 220d fills the groove 2110d, and the second light-transmitting structure 220d serves as a flat layer to improve the flatness of the display panel.
For example, in another example of the present disclosure, the slope (sidewall) of the groove is set such that the width of the end of the groove facing the display substrate is smaller than the width of the end facing away from the display substrate, in which case, the second light-transmitting structure may be formed first, and then the first light-transmitting structure covering the second light-transmitting structure may be formed, the first light-transmitting structure serving as a planarization layer to improve the flatness of the display panel.
For example, in the display panel provided by the embodiment of the present disclosure, the arrangement density of the light emitting devices located within the orthographic projection of the inclined plane on the plane of the display substrate is greater than that of the light emitting devices in other regions. The light emitted from a part of the light emitting devices in the region where the inclined plane is located (the second region 13 in the foregoing embodiment) exits the display panel from the first light-transmitting region, and by increasing the arrangement density of the light emitting devices in the region, on the one hand, the number of light emitting devices, of which the emergent light can enter the first light-transmitting region, can be increased, thereby improving the resolution of the display image in the first light-transmitting region; on the other hand, it is advantageous that each region of the display area emits light uniformly (for example, in the case of full white display), and the contrast of the display image is improved.
Note that, in the embodiment of the present disclosure, the first light-transmitting region may not be provided with a light-emitting device; alternatively, the light emitting devices may be disposed, but the arrangement density of the light emitting devices of the first light transmission region is greater than that of the light emitting devices of other regions, and the pitch of the light emitting devices of the first light transmission region is greater than that of the light emitting devices of other regions. Thus, the first light-transmitting area of the display panel can have good light transmittance.
In the embodiments of the present disclosure, the light control elements may be separately provided, or may be obtained by modifying the structure in the display panel. For example, an encapsulation layer may be disposed in the display panel to encapsulate elements such as light emitting devices, and thus, the light control elements may be formed on the encapsulation layer or the encapsulation layer (or certain layers included therein) may be modified to include the light control elements.
For example, in one example of the present disclosure, as shown in fig. 8, the light control element 200 is configured as an organic encapsulation layer. For example, the display panel may further include a first inorganic encapsulation layer 300 and a second inorganic encapsulation layer 400, and the light control element 200 is located between the first inorganic encapsulation layer 300 and the second inorganic encapsulation layer 400. The first inorganic encapsulation layer 300, the second inorganic encapsulation layer 400, and the second inorganic encapsulation layer 400 constitute an encapsulation layer 500. Therefore, the scheme of arranging the light control element can not increase the thickness of the display panel, and is beneficial to the light and thin design of the display panel.
For example, the first inorganic sealing layer 300 and the second inorganic sealing layer 400 are made of silicon nitride, silicon oxide, silicon oxynitride, or the like, and the inorganic material has high density and can prevent the intrusion of water, oxygen, or the like; for example, the material of the light control element 200 (organic encapsulation layer) may be a polymer material containing a desiccant or a polymer material capable of blocking moisture, such as a polymer resin, to planarize the surface of the display substrate, and may relieve the stress of the first inorganic encapsulation layer 300 and the second inorganic encapsulation layer 400, and may further include a water-absorbing material such as a desiccant to absorb water, oxygen, and other substances penetrating inside.
For example, in another example of the present disclosure, the encapsulation layer is located between the display substrate and the light control element. For example, the display panel may further include a structure formed on the encapsulation layer, such as a touch structure, in which the light control element may be integrated. For example, the display panel may include a package cover plate, and the light control element may be formed on the package cover plate to be mounted on the display panel in a bonding process of the package cover plate.
It should be noted that, in the embodiments of the present disclosure, specific structures of the display substrate and other included elements in the display panel are not limited, and may be designed as needed.
For example, in an embodiment of the present disclosure, as shown in fig. 8, the display substrate 100 includes a light emitting device 110 and a pixel defining layer 120. For example, the pixel defining layer 120 has a plurality of openings formed therein, and the light emitting devices 110 are located in the openings.
For example, the light emitting device 110 may include an anode, a light emitting functional layer, and a cathode, which are sequentially stacked, for example, anodes of a plurality of sub-pixels are spaced apart from each other and arranged in an array. The light emitting function layer may include a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, an electron injection layer, etc., and may further include, for example, a hole blocking layer, an electron blocking layer, etc.
For example, in the embodiment of the present disclosure, as shown in fig. 8, the display substrate further includes a base 600 and a driving circuit layer 700 on the base 600. For example, the driving circuit layer 700 may include a pixel driving circuit including a plurality of transistors, capacitors, and the like, for example, formed in various forms of 2T1C (i.e., 2 transistors (T) and 1 capacitor (C)), 3T1C, or 7T 1C. The pixel driving circuit is configured to control the light emitting device to emit light according to a scan signal applied to the gate line, a display data signal applied to the data line, and a power supply voltage supplied from the power supply line, thereby implementing image display.
Embodiments of the present disclosure provide a display device including a camera and a display panel as in the above embodiments. As shown in fig. 9, the camera 800 is located on the back side of the display panel (the side away from the display side), and the orthographic projection of the camera 800 on the display panel at least partially overlaps the first light-transmitting area 12.
For example, the image capturing device 800 is fixed to the back side of the display panel (e.g., the side of the display substrate facing away from the light control element) by means of double-sided tape or the like. The camera 800 and the first light-transmitting area 12 of the display panel overlap each other in a direction perpendicular to the display panel to receive ambient light incident through the first light-transmitting area 12 of the display substrate, and the ambient light is sensed to form an image. The camera 800 comprises, for example, an image sensor (prepared as an IC chip), the image sensor 800 being, for example, of a Complementary Metal Oxide Semiconductor (CMOS) type or a Charge Coupled Device (CCD) type, for example, comprising an array of imaging sub-pixels arranged in an array. The embodiments of the present disclosure do not limit the type and structure of the camera 800.
For example, in a display device provided in at least one embodiment of the present disclosure, a light splitting element (e.g., a light splitting grating) may be further disposed on the display side of the display panel, so that the display panel may have a three-dimensional display function.
For example, the display device in the embodiments of the present disclosure may be any product or component having a display function, such as a television, a digital camera, a mobile phone, a watch, a tablet computer, a notebook computer, and a navigator.
For clarity, the entire structure of the display device is not described. In order to implement the necessary functions of the display panel, those skilled in the art may set other structures according to specific application scenarios, and the embodiments of the present disclosure are not limited thereto.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and the like that are within the spirit and principle of the present invention are included in the present invention.
Claims (10)
1. A display panel, comprising:
a display substrate having a first light transmissive region and a second region adjacent to the first light transmissive region, the first light transmissive region having a light transmittance greater than a light transmittance of the second region, the display substrate comprising a plurality of light emitting devices;
the light control element is positioned on the light emergent side of the display substrate;
wherein, in the second region, the light control element is arranged to make the light emitted by the light emitting device converge towards the first light-transmitting region.
2. The display panel of claim 1, wherein the light control element comprises:
the first light-transmitting structure is provided with a groove, and at least part of the side wall of the groove is an inclined plane;
the second light-transmitting structure fills the groove;
wherein the refractive index of the first light-transmitting structure is different from the refractive index of the second light-transmitting structure, and an orthographic projection of the groove on the plane of the display substrate is at least partially overlapped with an orthographic projection of the first light-transmitting region on the plane of the display substrate,
preferably, an orthographic projection of the inclined plane on a plane of the display substrate is located outside an orthographic projection of the first light-transmitting area on a plane of the display substrate.
3. The display panel according to claim 2,
the inclined plane is arranged so that the width of the end of the groove facing the display substrate is smaller or larger than the width of the end facing away from the display substrate,
the refractive index of the first light-transmitting structure is smaller than that of the second light-transmitting structure.
4. The display panel of claim 3,
the inclined plane comprises a plane, and preferably, the plane is arranged to comprise a plurality of sub-planes which are sequentially connected and the inclination degrees of which are sequentially increased or decreased; and/or
The inclined surface includes a curved surface.
5. The display panel of claim 3,
at least one of the first light-transmitting structure and the second light-transmitting structure is a laminate composed of a plurality of film layers, and preferably, refractive indices of the respective film layers are different.
6. The display panel according to claim 5, wherein in a case where the slope is provided such that a width of an end of the groove facing the display substrate is smaller than a width of an end facing away from the display substrate,
the first light-transmitting structure comprises a plurality of first film layers, and the refractive indexes of the first film layers are sequentially increased from the display substrate to the light ray control element; and/or
The second light-transmitting structure is arranged to comprise a plurality of second film layers, and the refractive indexes of the second film layers are sequentially reduced from the display substrate to the light ray control element.
7. The display panel according to claim 5, wherein in a case where the slope is provided such that a width of an end of the groove facing the display substrate is larger than a width of an end facing away from the display substrate,
the first light-transmitting structure comprises a plurality of first film layers, and the refractive indexes of the first film layers are sequentially reduced from the display substrate to the light ray control element; and/or
The second light-transmitting structure is arranged to comprise a plurality of second film layers, and the refractive indexes of the second film layers are sequentially increased along the direction from the display substrate to the light ray control element.
8. The display panel of any of claims 2-7,
the arrangement density of the light-emitting devices in the orthographic projection of the inclined plane on the plane of the display substrate is greater than that of the light-emitting devices in other areas.
9. The display panel of any one of claims 1-7,
the light control element is configured as an organic encapsulation layer; or
The display panel comprises an encapsulation layer, and the light control element is positioned on one side of the encapsulation layer, which is far away from the display substrate.
10. A display device comprising a camera and the display panel of any one of claims 1-9,
the orthographic projection of the camera on the display panel is at least partially overlapped with the first light-transmitting area.
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| CN202011001359.2A CN112103320A (en) | 2020-09-22 | 2020-09-22 | Display panel and display device |
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| CN202011001359.2A CN112103320A (en) | 2020-09-22 | 2020-09-22 | Display panel and display device |
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