CN111834542B - Display panel and display device - Google Patents
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- CN111834542B CN111834542B CN202010599907.XA CN202010599907A CN111834542B CN 111834542 B CN111834542 B CN 111834542B CN 202010599907 A CN202010599907 A CN 202010599907A CN 111834542 B CN111834542 B CN 111834542B
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/856—Arrangements for extracting light from the devices comprising reflective means
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/858—Arrangements for extracting light from the devices comprising refractive means, e.g. lenses
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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
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Abstract
The invention discloses a display panel and a display device, and relates to the technical field of display, wherein the display panel comprises a display area and a non-display area surrounding the display area, and the display area comprises a first display area and a second display area; the display panel includes: a substrate base plate; an array layer; a light emitting structure layer including a plurality of sub-pixels; the second display area comprises an optical structure layer; the optical structure layer comprises a light adjusting structure; the light adjusting structure comprises a total reflection structure, in the second display area, a first emergent ray emitted by the optical structure layer is subjected to total reflection at least once after passing through the total reflection structure, and is emitted from the light emitting surface of the display panel as a second emergent ray, and the included angle formed by the first emergent ray and the normal of the light emitting surface of the display panel is smaller than the included angle formed by the second emergent ray and the normal of the light emitting surface of the display panel. The invention solves the problem of lower brightness of the side edge of the display device in the prior art.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel and a display device.
Background
Organic Light-Emitting Diode (OLED) display screens are increasingly used in high performance displays as a current-type Light-Emitting device, and OLED display screens have excellent characteristics of self-luminescence, no need of backlight, wide color gamut, high contrast, thin thickness, wide viewing angle, fast response speed, applicability to flexible panels, wide temperature range, simple structure and process, and the like, and are also increasingly used in mobile phone displays.
The light-emitting brightness of the left side and the right side of the screen in the existing OLED display screen is actually large-visual-angle light-emitting, and the large-visual-angle light-emitting brightness in the OLED display screen is only about 20% of the light-emitting brightness of the front visual angle, so that the light-emitting brightness of the left side and the right side of the screen is low, and the visual perception of a user is influenced.
Disclosure of Invention
In view of the above, the present invention provides a display panel and a display device to solve the problem of low brightness existing at the side of the display device in the prior art.
In a first aspect, the present invention provides a display panel, the display panel includes a display area and a non-display area surrounding the display area, the display area includes a first display area and a second display area, the second display area is located on a side of the first display area close to the non-display area; the display panel includes: a base substrate; the array layer is positioned on one side of the substrate base plate; the light emitting structure layer is positioned on one side of the array layer, which is far away from the substrate, and comprises a plurality of sub-pixels; the second display area comprises an optical structure layer, and the optical structure layer is positioned on one side of the light-emitting structure layer, which is far away from the substrate; the optical structure layer comprises a light adjusting structure, and the light adjusting structure is arranged corresponding to the sub-pixels in the direction vertical to the light emitting surface of the display panel in the second display area; the light adjusting structure comprises a total reflection structure, in the second display area, a first emergent ray emitted by the optical structure layer is subjected to total reflection at least once after passing through the total reflection structure, and is emitted from the light emitting surface of the display panel as a second emergent ray, and the included angle formed by the first emergent ray and the normal of the light emitting surface of the display panel is smaller than the included angle formed by the second emergent ray and the normal of the light emitting surface of the display panel.
In a second aspect, the invention further provides a display device comprising the display panel provided by the invention.
Compared with the prior art, the display panel and the display device provided by the invention at least realize the following beneficial effects:
the display panel provided by the invention comprises a display area and a non-display area surrounding the display area, wherein the display area comprises a first display area and a second display area, and the second display area is positioned on one side of the first display area close to the non-display area. The display panel includes a substrate base plate; the array layer is positioned on one side of the substrate base plate; the light emitting structure layer is positioned on one side of the array layer, which is far away from the substrate, the light emitting structure layer comprises a plurality of sub-pixels, the second display area in the display panel comprises an optical structure layer, and the optical structure layer is positioned on one side of the light emitting structure layer, which is far away from the substrate; the optical structure layer comprises a dimming structure, and in the second display area, in the direction perpendicular to the light-emitting surface of the display panel, the dimming structure is arranged corresponding to the sub-pixels, namely the dimming structure is arranged corresponding to the sub-pixels in the second display area. The light adjusting structure comprises a total reflection structure, in the second display area, a first emergent ray emitted by the optical structure layer is subjected to total reflection at least once after passing through the total reflection structure, and is emitted from the light emitting surface of the display panel as a second emergent ray, and an included angle formed by the first emergent ray and a normal line of the light emitting surface of the display panel is smaller than an included angle formed by the second emergent ray and a normal line of the light emitting surface of the display panel. When a user watches the display panel at an angle equivalent to a normal viewing angle right above the first display area of the display panel, the setting of the total reflection structure enables light originally at a small viewing angle in the second display area to be converted into light at a large viewing angle and emitted from the light emitting surface of the display panel, so that the quantity of light at the large viewing angle in the second display area is increased, the light emitting brightness at the large viewing angle in the second display area is enhanced, the difference between the light emitting brightness of the first display area and the light emitting brightness of the second display area is reduced, and the display quality of the display panel is improved.
Of course, it is not necessary for any product in which the present invention is practiced to specifically achieve all of the above-described technical effects simultaneously.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic plan view of a display panel according to the present invention;
FIG. 2 is a schematic diagram of a side view of the display panel shown in FIG. 1 along direction A;
FIG. 3 is an enlarged partial view of portion B of FIG. 2;
FIG. 4 is a schematic view of a portion B of FIG. 2;
FIG. 5 is a schematic view of a portion B of FIG. 2;
FIG. 6 is a schematic view of a portion B of FIG. 2;
FIG. 7 is a schematic view of a portion B of FIG. 2;
FIG. 8 is a schematic view of a display panel shown in FIG. 1 viewed from the side along direction A;
fig. 9 is a schematic plan view of a display device according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a schematic plane structure diagram of a display panel according to the present invention, fig. 2 is a schematic structure diagram of a side view of the display panel shown in fig. 1 along a direction a, fig. 3 is a schematic partial enlarged structure diagram of a portion B in fig. 2 (for clarity of illustrating the technical solution of the present embodiment, the partial enlarged diagram of fig. 3 is illustrated by taking a panel structure corresponding to one sub-pixel 301 as an example), and referring to fig. 1 to fig. 3, the present embodiment provides a display panel, the display panel includes a display area AA and a non-display area NA surrounding the display area AA, the display area AA includes a first display area AA1 and a second display area AA2, and the second display area AA2 is located on a side of the first display area AA1 close to the non-display area NA; the display panel includes:
a base substrate 10;
an array layer 20 located at one side of the substrate base plate 10;
the light emitting structure layer 30 is positioned on one side of the array layer 20 far away from the substrate 10, and the light emitting structure layer 30 comprises a plurality of sub-pixels 301;
the second display area AA2 includes an optical structure layer 40, the optical structure layer 40 is located on a side of the light emitting structure layer 30 away from the substrate base plate 10;
the optical structure layer 40 includes a light modulation structure 41, and in the second display area AA2, in the direction Z perpendicular to the light exit surface of the display panel, the light modulation structure 41 is disposed corresponding to the sub-pixel 301;
the light-adjusting structure 41 includes a total reflection structure 42, in the second display area AA2, the first outgoing light L1 emitted from the optical structure layer 30 passes through the total reflection structure 42, is totally reflected at least once, and is emitted from the light-emitting surface of the display panel as the second outgoing light L2, and an included angle formed by the first outgoing light L1 and a normal F11 of the light-emitting surface of the display panel is smaller than an included angle formed by the second outgoing light L2 and a normal F12 of the light-emitting surface of the display panel.
Specifically, with continuing reference to fig. 1 to fig. 3, the display panel provided in this embodiment includes a display area AA and a non-display area NA surrounding the display area AA, where the display area AA includes a first display area AA1 and a second display area AA2, and the second display area AA2 is located on a side of the first display area AA1 close to the non-display area NA. Fig. 1 and 2 exemplarily show that the display panel includes two second display areas AA2, and optionally, the number of the second display areas AA2 may also be other values, which is not specifically limited in this embodiment.
The display panel of the present embodiment includes a base substrate 10; the array layer 20 is positioned on one side of the substrate base plate 10; the light emitting structure layer 30 is located on a side of the array layer 20 away from the substrate 10, and the light emitting structure layer 30 includes a plurality of sub-pixels 301, and optionally, the array layer 20 may include a plurality of sub-pixel control units for controlling whether the sub-pixels 301 of the light emitting structure layer 30 emit light or not. Optionally, a pixel defining layer 50 may be further disposed on one side of the substrate 10, the pixel defining layer 50 includes openings 501 and flat portions 502 between the openings 501, the pixel defining layer 50 is used to define the disposition positions of the sub-pixels 301 of the light emitting structure layer 30, and the sub-pixels 301 are located in the openings 501; the display panel of the embodiment may further include a cover plate, an optical adhesive, a film encapsulation layer, and the like (not filled in the figure), and the invention is not described in detail herein.
The second display area AA2 in the display panel includes the optical structure layer 40, the optical structure layer 40 is located on the side of the light emitting structure layer 30 away from the substrate 10; the optical structure layer 40 includes a light modulation structure 41, in the second display area AA2, the light modulation structure 41 is disposed corresponding to the sub-pixel 301 in a direction Z perpendicular to the light emitting surface of the display panel, that is, the light modulation structure 41 is disposed corresponding to the sub-pixel 301 in the second display area AA2, and in the direction Z perpendicular to the light emitting surface of the display panel, a vertical projection of the light modulation structure 41 on the light emitting surface of the display panel and a vertical projection of the flat portion 502 defining the corresponding sub-pixel on the light emitting surface of the display panel at least partially overlap. The light-adjusting structure 41 includes a total reflection structure 42, in the second display area AA2, the first outgoing light L1 emitted from the optical structure layer 30 passes through the total reflection structure 42, is totally reflected at least once, and is emitted from the light-emitting surface of the display panel as the second outgoing light L2, and an included angle formed by the first outgoing light L1 and a normal F11 of the light-emitting surface of the display panel is smaller than an included angle formed by the second outgoing light L2 and a normal F12 of the light-emitting surface of the display panel. Assuming that the viewing angle of the user is at the position R (equivalent to human eyes) in fig. 2, that is, when the user views the display panel at an angle equivalent to a front viewing angle directly above the first display area AA1 of the display panel, the arrangement of the total reflection structure 42 enables light, which is originally at a small viewing angle in the second display area AA2, to be converted into light at a large viewing angle and to be emitted from the light emitting surface of the display panel, so that the number of light rays at a large viewing angle in the second display area AA2 is increased, thereby increasing the light emitting brightness at a large viewing angle in the second display area AA2, reducing the difference between the light emitting brightness of the first display area AA1 and the light emitting brightness of the second display area AA2, and improving the display quality of the display panel.
With continued reference to fig. 1-3, optionally, wherein the optical structure layer 40 includes a first optical structure layer 43 and a second optical structure layer 44, the second optical structure layer 44 covering the first optical structure layer 43; wherein the refractive index of the first optical structure layer 43 is greater than the refractive index of the second optical structure layer 44;
the total reflection structure 42 is a first interface 421 between the first optical structure layer 43 and the second optical structure layer 44, and the first interface 421 is a first arc surface 422 recessed toward the light emitting structure layer 30.
Specifically, since fig. 3 is a two-dimensional view, the first arc 422 is illustrated by lines in fig. 3. Since the refractive index of the first optical structure layer 43 is greater than the refractive index of the second optical structure layer 44, the first outgoing light L1 emitted from the sub-pixel 301 is totally reflected at the first arc 422, and the totally reflected light is further refracted from the interface 422' between the first optical structure layer 43 and the second optical structure layer 44 to emit the second outgoing light L2 from the light emitting surface of the display panel, so that the included angle formed by the second outgoing light L2 and the normal F12 of the light emitting surface of the display panel is greater than the included angle formed by the first outgoing light L1 and the normal F11 of the light emitting surface of the display panel.
It should be noted that, the first arc 422 is a total reflection functional surface, when the first outgoing light L1 emitted from the light emitting structure layer 30 enters the first arc 422, the incident angle is relatively large, and even larger than the total reflection angle, most or all of the first outgoing light L1 is totally reflected at the first arc 422, so that the outgoing angle of the light emitted from the light emitting surface of the display panel is changed. The total reflection angle here means that after the first outgoing light L1 enters the second optical structure layer 44 from the first optical structure layer 43 and is refracted at the first arc surface 422, an incident angle η corresponding to a refraction angle of 90 degrees is the total reflection angle, and sin η ═ n2/n1, where n1 is the refractive index of the first optical structure layer 43, n2 is the refractive index of the second optical structure layer 44, and n1 is greater than n 2.
Fig. 4 is another partial enlarged structural diagram of a portion B in fig. 2 (for clarity, the partial enlarged view of fig. 4 illustrates a panel structure corresponding to one sub-pixel 301), referring to fig. 1, fig. 2 and fig. 4, optionally, wherein the dimming structure 41 further includes a refractive structure 45, and in the same dimming structure 41, the refractive structure 45 is located on a side of the total reflection structure 42 away from the first display area AA 1;
in the second display area AA2, after passing through the refractive structure 45, the third outgoing light L3 emitted from the optical structure layer 40 is emitted from the light-emitting surface of the display panel as a fourth outgoing light L4, and an included angle formed by the fourth outgoing light L4 and a normal F13 of the light-emitting surface of the display panel is larger than an included angle formed by the third outgoing light L3 and a normal F14 of the light-emitting surface of the display panel.
Specifically, with continuing reference to fig. 1, fig. 2 and fig. 4, the light adjusting structure 41 further includes a refractive structure 45, in the same light adjusting structure 41, the refractive structure 45 is located on a side of the total reflection structure 42 away from the first display area AA1, and a vertical projection of the light adjusting structure 41 on the light emitting surface of the display panel and a vertical projection of the corresponding sub-pixel 301 on the light emitting surface of the display panel at least partially overlap. In the second display area AA2, after passing through the refractive structure 45, the third outgoing light L3 emitted from the sub-pixel 301 is emitted from the light-emitting surface of the display panel as the fourth outgoing light L4, and an included angle formed by the fourth outgoing light L4 and a normal F13 of the light-emitting surface of the display panel is greater than an included angle formed by the third outgoing light L3 and a normal F14 of the light-emitting surface of the display panel. Assuming that the viewing angle of the user is at the position R (equivalent to human eyes) in fig. 2, that is, when the user views the display panel at an angle equivalent to a front viewing angle directly above the first display area AA1 of the display panel, the arrangement of the refractive structure 45 further increases the amount of light rays with a large viewing angle in the second display area AA2, further enhances the light-emitting brightness at a large viewing angle in the second display area AA2, reduces the difference between the light-emitting brightness of the first display area AA1 and the light-emitting brightness of the second display area AA2, and improves the display quality of the display panel.
And the refractive structure 45 is located at a side of the total reflection structure 42 far away from the first display area AA1, the total reflection structure 42 deflects light of the sub-pixel 301 corresponding thereto near the first display area AA1 toward a direction near the first display area AA1, and the refractive structure 45 deflects light of the sub-pixel 301 corresponding thereto far away from the first display area AA1 toward a direction near the first display area AA1, so that when a user views the display panel at an angle equivalent to a front viewing angle right above the first display area AA1 of the display panel, uniformity of light-emitting brightness at various places in the second display area AA2 is improved, and display quality of the display panel is further improved.
With continued reference to fig. 1, 2, and 4, optionally, the refractive structure 45 is a second interface 451 between the first optical structure layer 43 and the second optical structure layer 44, and the second interface 451 is a second arc surface 452 recessed toward the light emitting structure layer.
Specifically, since fig. 4 is a two-dimensional view, the second arc surface 452 is illustrated by a line in fig. 4. Since the refractive index of the first optical structure layer 43 is greater than the refractive index of the second optical structure layer 44, the third outgoing light L3 emitted from the sub-pixel 301 is refracted at the second arc 452, and the fourth outgoing light L4 is emitted from the light-emitting surface of the display panel, so that the included angle formed by the fourth outgoing light L4 and the normal F13 of the light-emitting surface of the display panel is greater than the included angle formed by the third outgoing light L3 and the normal F14 of the light-emitting surface of the display panel.
With continued reference to fig. 1, 2, and 4, optionally, wherein the maximum radius of curvature of first arc 422 is less than the minimum radius of curvature of second arc 452.
Specifically, the maximum curvature radius of the first arc surface 422 is smaller than the minimum curvature radius of the second arc surface 452, which is beneficial to the total reflection of the light emitted from the first optical structure layer 43 when the light enters the first arc surface 422. Optionally, the curvature radius of the portion of the first arc 422 closer to the first display area AA1 is smaller, so that the angle at which the light ray exiting from the sub-pixel 301, which is farther away from the first display area AA1, is deflected in the direction closer to the first display area AA1 after passing through the first arc 422 is larger; optionally, the curvature radius of the portion of the second arc 452 closer to the first display area AA1 is smaller, so that the angle at which the light beam further away from the first display area AA1 in the light beams emitted from the sub-pixel 301 is deflected in the direction closer to the first display area AA1 after passing through the second arc 452 is larger, so that when a user views the display panel directly above the first display area AA1 of the display panel at an angle equivalent to a front viewing angle, the uniformity of the light-emitting brightness at each position in the second display area AA2 is improved, and the display quality of the display panel is further improved.
Fig. 5 is a schematic diagram of a further partial enlarged structure of the portion B in fig. 2 (for clarity, the partial enlarged view of fig. 5 illustrates a panel structure corresponding to one sub-pixel 301), and referring to fig. 1, fig. 2 and fig. 5, optionally, the display panel includes a first section C-C ', where the first section C-C ' passes through the dimming structure 41 and the sub-pixel 301 corresponding thereto, and the first section C-C ' is perpendicular to the light emitting surface of the display panel and parallel to the second display area AA2, and points to the direction of the first display area AA 1;
an intersection line of the first section C-C' and the first arc surface 422 is a first arc line 423, the first arc line 423 includes a first end point 424 close to the first display area AA1, and an included angle α is formed between a tangent line of the first end point 424 and a plane where the light-emitting surface of the display panel is located;
an intersection line of the first section C-C' and the second arc surface 452 is a second arc line 453, the second arc line 453 includes a second end 454 far away from the first display area AA1, and an included angle β is formed between a tangent of the second end 454 and a plane where the light emitting surface of the display panel is located; wherein the content of the first and second substances,
0°＜β＜α。
specifically, the display panel includes a first section C-C', which is perpendicular to the light exit surface of the display panel and parallel to the direction (i.e., the X direction in fig. 5) in which the second display area AA2 points to the first display area AA 1. An intersection line of the first section C-C 'and the first arc surface 422 is a first arc 423, the first arc 423 includes a first end point 424 close to the first display area AA1, an included angle between a tangent of the first end point 424 and a plane where the light emitting surface of the display panel is located is α, an intersection line of the first section C-C' and the second arc surface 452 is a second arc 453, the second arc 453 includes a second end point 454 far away from the first display area AA1, an included angle between a tangent of the second end point 454 and the plane where the light emitting surface of the display panel is located is β, β is less than α, that is, the first arc surface 422 and the second arc surface 452 in the dimming structure 41 are asymmetric structures, so that light emitted from the sub-pixel 301 is prevented from being symmetrically distributed after passing through the dimming structure 41 corresponding to affect emission of light at certain angles, affect emission brightness of light emitted from the second display area AA2, and affect display quality of the display panel.
With continued reference to FIGS. 1, 2, and 5, optionally, wherein α is 65 ≦ 90.
Specifically, the intersection line of the first cross section C-C' and the first arc surface 422 is a first arc line 423, the first arc line 423 includes a first end point 424 close to the first display area AA1, an included angle between a tangent of the first end point 424 and a plane where a light-emitting surface of the display panel is located is α, α is greater than or equal to 65 degrees and less than or equal to 90 degrees, which is beneficial for total reflection of light rays emitted from the corresponding sub-pixels 301 when passing through the first arc surface 422, so that when a user views the display panel at an angle equivalent to a front viewing angle right above the first display area AA1 of the display panel, the light-emitting brightness of the second display area AA2 is further improved.
With continued reference to FIGS. 1, 2, and 5, optionally, where 0 ° < β ≦ 30 °.
Specifically, the intersection line of the first cross section C-C' and the second arc surface 452 is a second arc surface 453, the second arc surface 453 includes a second end 454 far away from the first display area AA1, an included angle between a tangent of the second end 454 and a plane where the light emitting surface of the display panel is located is β, β is greater than 0 degree and less than or equal to 30 degrees, the second arc surface 452 refracts the light emitted from the corresponding sub-pixel 301 through the second arc surface 452, so that when a user views the display panel at an angle equivalent to a front viewing angle right above the first display area AA1 of the display panel, uniformity of light emitting brightness of the second display area AA2 is improved, and a situation that the light emitted from the sub-pixel 301 is totally reflected at the second arc surface 452 and cannot be emitted from the light emitting surface of the display panel is effectively reduced.
Fig. 6 is a schematic diagram of a further partial enlarged structure of the portion B in fig. 2 (for clarity, the partial enlarged view of fig. 6 illustrates a panel structure corresponding to one sub-pixel 301), and referring to fig. 1, fig. 2 and fig. 6, optionally, the display panel further includes a pixel defining layer 50 having a plurality of openings 501, the pixel defining layer 50 includes a flat portion 502 between the openings 501, the pixel defining layer 50 is located on a side of the array layer 20 away from the substrate 10, and each sub-pixel 301 is correspondingly disposed in one opening 501;
the display panel comprises a first section C-C ', which passes through the dimming structure 41 and the sub-pixel 301 corresponding to the dimming structure, wherein the first section C-C' is perpendicular to the light emitting surface of the display panel and parallel to the direction in which the second display area AA2 points to the first display area AA 1;
the flat portion 502 includes a first bottom surface 503, the first bottom surface 503 is located on a side of the flat portion 502 close to the substrate base plate 10, an intersection of the first bottom surface 503 and the first section C-C' is a first intersection 504, and the first intersection 504 includes an a end point 505 far away from the first display area AA 1;
the first section C-C' intersects with a first arc 423, and the first arc 423 comprises a first endpoint 424 close to the first display area AA1 and a third endpoint 425 far away from the first display area AA 1;
in the first cross section C-C', the vertical projection of the third endpoint 425 on the light-emitting surface of the display panel is coincident with the vertical projection of the first endpoint 505 of the first intersection line 504 closest to the third endpoint on the light-emitting surface of the display panel; the vertical projection of the first end point 424 on the light-emitting surface of the display panel is located between the midpoint 506 of the first intersection line 504 closest to the first end point and the vertical projection of the first end point 505 on the light-emitting surface of the display panel.
Specifically, the display panel includes a first section C-C ', which passes through the light modulation structure 41 and the sub-pixel 301 corresponding thereto, the first section C-C ' is perpendicular to the light emitting surface of the display panel and parallel to the direction (X direction in fig. 6) in which the second display area AA2 points to the first display area AA1, in the first section C-C ', the vertical projection of the third end point 425 in the first arc 423 on the light emitting surface of the display panel coincides with the vertical projection of the first end point 505 of the first intersection 504 closest to the third end point on the light emitting surface of the display panel, the vertical projection of the first end point 424 in the first arc 423 on the light emitting surface of the display panel is located between the midpoint 506 of the first intersection 504 closest to the first end point and the vertical projection of the first end point 505 on the light emitting surface of the display panel, because the thickness of the optical structure layer 40 in the display panel is limited, such an arrangement is beneficial to setting the curvature radius of the first cambered surface 422 to a small value, and is beneficial to the total reflection of the light emitted by the first optical structure layer 43 when the light enters the first cambered surface 422. And the vertical projection of the first arc 422 on the light-emitting surface of the display panel and the vertical projection of the sub-pixel 301 corresponding to the first arc 422 on the light-emitting surface of the display panel are not overlapped, so that the influence of the total reflection structure 42 on the light emitted by the sub-pixel 301 corresponding to the first arc and perpendicular to the light-emitting surface of the display panel is effectively avoided.
Fig. 7 is a schematic diagram of a further partial enlarged structure of the portion B in fig. 2 (for clarity, the partial enlarged view of fig. 7 illustrates a panel structure corresponding to one sub-pixel 301), and referring to fig. 1, fig. 2 and fig. 7, optionally, the display panel further includes a pixel defining layer 50 having a plurality of openings 501, the pixel defining layer 50 includes a flat portion 502 between the openings 501, the pixel defining layer 50 is located on a side of the array layer 20 away from the substrate 10, and each sub-pixel 301 is correspondingly disposed in one opening 501;
the display panel comprises a first section C-C ', which passes through the dimming structure 41 and the sub-pixel 301 corresponding to the dimming structure, wherein the first section C-C' is perpendicular to the light emitting surface of the display panel and parallel to the direction in which the second display area AA2 points to the first display area AA 1;
the flat portion 502 includes a first bottom surface 503, the first bottom surface 503 is located on a side of the flat portion 502 close to the substrate base plate 10, an intersection of the first bottom surface 503 and the first cross section C-C' is a first intersection 504, and the first intersection 504 includes a second end 507 close to the first display area AA 1;
the intersection of the first section C-C' and the second arc surface 452 is a second arc 453, and the second arc 453 includes a second end 454 far from the first display area AA1 and a fourth end 455 near the first display area AA 1;
the sub-pixel 301 comprises a second bottom surface 302, the second bottom surface 302 is located on one side of the sub-pixel 301 close to the substrate base plate 10, an intersection line of the second bottom surface 302 and the first cross section C-C' is a second intersection line 303, and the second intersection line 303 comprises a third end point 304 close to the first display area AA 1;
in the first cross section C-C', the vertical projection of the fourth endpoint 455 on the light-emitting surface of the display panel is located between the midpoint 305 of the second intersection line 303 and the vertical projection of the third endpoint 304 on the light-emitting surface of the display panel;
the vertical projection of the second end point 454 on the light-emitting surface of the display panel is located between the midpoint 506 of the first intersection line 504 closest to the second end point and the vertical projection of the second end point 507 on the light-emitting surface of the display panel.
Specifically, in the first cross section C-C', a vertical projection of the fourth endpoint 455 on the light-emitting surface of the display panel is located between the midpoint 305 of the second intersection line 303 and the vertical projection of the third endpoint 304 on the light-emitting surface of the display panel, and a vertical projection of the second endpoint 454 on the light-emitting surface of the display panel is located between the midpoint 506 of the first intersection line 504 closest to the second endpoint and the vertical projection of the second endpoint 507 on the light-emitting surface of the display panel. Because the thickness of the optical structure layer 40 in the display panel is limited, such an arrangement is beneficial to setting the curvature radius of the second arc surface 452 to a larger value, and is beneficial to refraction of the light emitted from the first optical structure layer 43 when the light enters the second arc surface 452. And the situation that the light emitted from the sub-pixel 301 is totally reflected at the second arc 452 and cannot be emitted from the light emitting surface of the display panel is effectively reduced. In the same dimming structure 41, a part of the second optical structure layer 44 between the first arc surface 422 and the second arc surface 452 is not in contact with the first optical structure layer 43, but is directly in contact with the film layer in contact with the optical structure layer 40, so that the influence of the dimming structure 41 on the light emitted by the corresponding sub-pixel 301 and perpendicular to the light emitting surface of the display panel is effectively reduced, and the display effect of the display panel is improved.
With continued reference to fig. 1, 2, and 7, optionally, wherein the refractive index of the first optical structure layer 43 is n1, and the refractive index of the second optical structure layer 44 is n 2; wherein the content of the first and second substances,
1.5≤n1≤2，1.2≤n2≤1.6。
this embodiment further illustrates that, alternatively, the refractive index of the first optical structure layer 43 is in the range of n1, where 1.5. ltoreq. n 1. ltoreq.2; the refractive index range of the second optical structure layer 44 is n2, wherein n2 is greater than or equal to 1.2 and less than or equal to 1.6. Since the optical structure layer 40 may further have other film structures, such as a package structure layer, an optical adhesive, a cover plate, etc., on a side facing the light emitting surface E of the display panel, and the optical structure layer 40 may also have other film structures, such as a package structure layer, a light emitting structure layer 30, a pixel defining layer 50, etc., on a side facing away from the light emitting surface E of the display panel. Therefore, while the refractive index n1 of the first optical structure layer 43 is greater than the refractive index n2 of the second optical structure layer 44, the present embodiment also makes the refractive index range of the first optical structure layer 43 n1, 1.5 ≦ n1 ≦ 2 for matching the refractive indexes of the other film layers of the panel on both sides of the optical structure layer 40; the refractive index range of the second optical structure layer 44 is n2, and n2 is greater than or equal to 1.2 and less than or equal to 1.6, so that the refraction of the emergent light of the panel through each film layer of the panel and the change of the emergent angle through the optical structure layer 40 are satisfied, and the brightness of the second display area AA2 and the brightness of the first display area AA1, which are observed by an end user at the position R, tend to be consistent.
Optionally, the display panel further includes a package structure layer, where the package structure layer is located on a side of the light emitting structure layer away from the array layer;
the optical structure layer is positioned on one side of the packaging structure layer close to the array layer, or the optical structure layer is positioned on one side of the packaging structure layer far away from the array layer.
With continued reference to fig. 1, fig. 2 and fig. 7, the display panel further includes an encapsulation structure layer 60 (not filled in the drawing), the encapsulation structure layer 60 is located at a side of the light emitting structure layer 30 away from the array layer 20; the optical structure layer 40 is located on a side of the encapsulation structure layer 60 away from the array layer 20. After the light emitted from the light emitting structure layer 30 passes through the package structure layer 60, the light emitting angle of the light emitted to the light emitting surface of the display panel can be changed through the optical structure layer 40. Optionally, the optical structure layer may be further located on a side of the package structure layer close to the array layer, and at this time, the influence of the package structure layer on the direction of the outgoing light of the optical structure layer may be weakened or offset by adjusting parameters of the optical structure layer. The package structure layer 60 of this embodiment can increase the quantity of light rays with a large viewing angle in the second display area AA2 no matter which side of the optical structure layer 40 is located, thereby enhancing the light brightness with a large viewing angle in the second display area AA2, reducing the difference between the light brightness of the first display area AA1 and the light brightness of the second display area AA2, and improving the display quality of the display panel.
Fig. 8 is a schematic structural diagram of the display panel shown in fig. 1 viewed from a side along direction a, and referring to fig. 3, fig. 1, fig. 3 and fig. 8, in fig. 8, a partial enlarged structural diagram of a portion B' may be optionally shown, where the second display area AA2 is a bent display area, and the bent display area is bent in a direction away from the light emitting surface of the display panel.
Specifically, the display panel provided in this embodiment is a flexible display panel, and includes a display area AA and a non-display area NA surrounding the display area AA, where the display area AA includes a first display area AA1 and a second display area AA2, the second display area AA2 is located on a side of the first display area AA1 close to the non-display area NA, the second display area AA2 is a bent display area, and the bent display area is bent toward a direction away from a light emitting surface of the display panel. The light-adjusting structure 41 in the second display area AA2 includes a total reflection structure 42, in the second display area AA2, the first outgoing light L1 emitted from the optical structure layer 30 passes through the total reflection structure 42 and is totally reflected at least once, and is emitted from the light-emitting surface of the display panel as the second outgoing light L2, and an included angle formed by the first outgoing light L1 and a normal F11 of the light-emitting surface of the display panel is smaller than an included angle formed by the second outgoing light L2 and a normal F12 of the light-emitting surface of the display panel. Assuming that the viewing angle of the user is at the position R (equivalent to human eyes) in fig. 8, that is, when the user views the display panel at an angle equivalent to a front viewing angle directly above the first display area AA1 of the display panel, the arrangement of the total reflection structure 42 enables light, which is originally at a small viewing angle in the second display area AA2, to be converted into light at a large viewing angle and to be emitted from the light emitting surface of the display panel, so that the number of light rays at a large viewing angle in the second display area AA2 is increased, thereby increasing the light emitting brightness at a large viewing angle in the second display area AA2, reducing the difference between the light emitting brightness of the first display area AA1 and the light emitting brightness of the second display area AA2, and improving the display quality of the display panel.
The present embodiment provides a display device including the display panel as described above.
Referring to fig. 9, fig. 9 is a schematic plan view of a display device according to the present invention. Fig. 9 provides a display device 1000 including a display panel 100, wherein the display panel is the display panel 100 according to any of the embodiments of the present invention. The embodiment of fig. 9 only takes a mobile phone as an example to describe the display device 1000, and it should be understood that the display device provided in the embodiment of the present invention may be other display devices with a display function, such as a computer, a television, a vehicle-mounted display device, etc., and the present invention is not limited to this. The display device provided in the embodiment of the present invention has the beneficial effects of the display panel provided in the embodiment of the present invention, and specific reference may be made to the specific description of the display panel in each of the above embodiments, which is not repeated herein.
As can be seen from the above embodiments, the display panel and the display device provided by the present invention at least achieve the following beneficial effects:
the display panel provided by the invention comprises a display area and a non-display area surrounding the display area, wherein the display area comprises a first display area and a second display area, and the second display area is positioned on one side of the first display area close to the non-display area. The display panel includes a substrate base plate; the array layer is positioned on one side of the substrate base plate; the light emitting structure layer is positioned on one side of the array layer, which is far away from the substrate base plate, the light emitting structure layer comprises a plurality of sub-pixels, the second display area in the display panel comprises an optical structure layer, and the optical structure layer is positioned on one side of the light emitting structure layer, which is far away from the substrate base plate; the optical structure layer comprises a dimming structure, and in the second display area, in the direction perpendicular to the light-emitting surface of the display panel, the dimming structure is arranged corresponding to the sub-pixels, namely the dimming structure is arranged corresponding to the sub-pixels in the second display area. The light adjusting structure comprises a total reflection structure, in the second display area, a first emergent ray emitted by the optical structure layer is subjected to total reflection at least once after passing through the total reflection structure, and is emitted from the light emitting surface of the display panel as a second emergent ray, and an included angle formed by the first emergent ray and a normal line of the light emitting surface of the display panel is smaller than an included angle formed by the second emergent ray and a normal line of the light emitting surface of the display panel. When a user watches the display panel at an angle equivalent to a normal viewing angle right above the first display area of the display panel, the setting of the total reflection structure enables light originally at a small viewing angle in the second display area to be converted into light at a large viewing angle and emitted from the light emitting surface of the display panel, so that the quantity of light at the large viewing angle in the second display area is increased, the light emitting brightness at the large viewing angle in the second display area is enhanced, the difference between the light emitting brightness of the first display area and the light emitting brightness of the second display area is reduced, and the display quality of the display panel is improved.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (13)
1. A display panel is characterized by comprising a display area and a non-display area surrounding the display area, wherein the display area comprises a first display area and a second display area, and the second display area is positioned on one side of the first display area, which is close to the non-display area; the display panel includes:
a substrate base plate;
the array layer is positioned on one side of the substrate base plate;
the light emitting structure layer is positioned on one side of the array layer, which is far away from the substrate, and comprises a plurality of sub-pixels;
the second display area comprises an optical structure layer, and the optical structure layer is positioned on one side of the light emitting structure layer, which is far away from the substrate;
the optical structure layer comprises a dimming structure, and the dimming structure is arranged corresponding to the sub-pixels in the direction perpendicular to the light-emitting surface of the display panel in the second display area;
the light adjusting structure comprises a total reflection structure, in the second display area, a first emergent ray emitted by the optical structure layer is subjected to total reflection at least once after passing through the total reflection structure and is emitted from the light emitting surface of the display panel as a second emergent ray, and an included angle formed by the first emergent ray and a normal of the light emitting surface of the display panel is smaller than an included angle formed by the second emergent ray and a normal of the light emitting surface of the display panel;
the optical structure layer comprises a first optical structure layer and a second optical structure layer, and the second optical structure layer covers the first optical structure layer; wherein a refractive index of the first optical structure layer is greater than a refractive index of the second optical structure layer;
the total reflection structure is a first interface between the first optical structure layer and the second optical structure layer, and the first interface is a first cambered surface which is concavely arranged towards the direction of the light emitting structure layer.
2. The display panel according to claim 1,
the light adjusting structure further comprises a refraction structure, and in the same light adjusting structure, the refraction structure is positioned on one side, far away from the first display area, of the total reflection structure;
in the second display area, third emergent rays emitted by the optical structure layer pass through the refraction structure and then are emitted from the light emitting surface of the display panel as fourth emergent rays, and an included angle formed by the fourth emergent rays and a normal of the light emitting surface of the display panel is larger than an included angle formed by the third emergent rays and the normal of the light emitting surface of the display panel.
3. The display panel according to claim 2,
the refraction structure is a second interface between the first optical structure layer and the second optical structure layer, and the second interface is a second cambered surface which is concavely arranged towards the direction of the light emitting structure layer.
4. The display panel according to claim 3,
the maximum radius of curvature of the first cambered surface is smaller than the minimum radius of curvature of the second cambered surface.
5. The display panel according to claim 4,
the display panel comprises a first section, the first section passes through the dimming structure and the sub-pixels corresponding to the dimming structure, and the first section is perpendicular to a light-emitting surface of the display panel and parallel to the direction in which the second display area points to the first display area;
an intersection line of the first cross section and the first arc surface is a first arc line, the first arc line comprises a first endpoint close to the first display area, and an included angle between a tangent line of the first endpoint and a plane where a light-emitting surface of the display panel is located is alpha;
the intersection line of the first cross section and the second arc surface is a second arc line, the second arc line comprises a second end point far away from the first display area, and an included angle between a tangent line of the second end point and a plane where a light-emitting surface of the display panel is located is beta; wherein, the first and the second end of the pipe are connected with each other,
0°＜β＜α。
6. the display panel according to claim 5,
65°≤α≤90°。
7. the display panel according to claim 5,
0°＜β≤30°。
8. the display panel according to claim 1,
the display panel further comprises a pixel defining layer with a plurality of openings, the pixel defining layer comprises a flat part between the openings, the pixel defining layer is positioned on one side of the array layer far away from the substrate base plate, and each sub-pixel is correspondingly arranged in one opening;
the display panel comprises a first section, the first section passes through the dimming structure and the sub-pixels corresponding to the dimming structure, and the first section is perpendicular to a light-emitting surface of the display panel and parallel to the direction in which the second display area points to the first display area;
the flat part comprises a first bottom surface, the first bottom surface is positioned on one side of the flat part close to the substrate base plate, the intersection line of the first bottom surface and the first cross section is a first intersection line, and the first intersection line comprises a first end point far away from the first display area;
the intersection line of the first section and the first arc surface is a first arc line, and the first arc line comprises a first end point close to the first display area and a third end point far away from the first display area;
in the first cross section, the vertical projection of the third end point on the light-emitting surface of the display panel is coincident with the vertical projection of the first end point of the first intersection line closest to the third end point on the light-emitting surface of the display panel; the vertical projection of the first end point on the light-emitting surface of the display panel is positioned between the midpoint of the first intersection line closest to the first end point and the vertical projection of the first end point on the light-emitting surface of the display panel.
9. The display panel according to claim 3,
the display panel further comprises a pixel defining layer with a plurality of openings, the pixel defining layer comprises a flat part between the openings, the pixel defining layer is positioned on one side of the array layer away from the substrate base plate, and each sub-pixel is correspondingly arranged in one opening;
the display panel comprises a first section, the first section passes through the dimming structure and the sub-pixels corresponding to the dimming structure, and the first section is perpendicular to a light-emitting surface of the display panel and parallel to the direction in which the second display area points to the first display area;
the flat part comprises a first bottom surface, the first bottom surface is positioned on one side, close to the substrate base plate, of the flat part, the intersecting line of the first bottom surface and the first cross section is a first intersecting line, and the first intersecting line comprises a second end point close to the first display area;
the intersection line of the first cross section and the second arc surface is a second arc line, and the second arc line comprises a second endpoint far away from the first display area and a fourth endpoint close to the first display area;
the sub-pixel comprises a second bottom surface, the second bottom surface is positioned on one side, close to the substrate, of the sub-pixel, the intersection line of the second bottom surface and the first cross section is a second intersection line, and the second intersection line comprises a third end point close to the first display area;
in the first cross section, the vertical projection of the fourth endpoint on the light-emitting surface of the display panel is located between the midpoint of the second intersection line corresponding to the fourth endpoint and the vertical projection of the third endpoint on the light-emitting surface of the display panel;
the vertical projection of the second end point on the light-emitting surface of the display panel is positioned between the midpoint of the first intersection line closest to the second end point and the vertical projection of the second end point on the light-emitting surface of the display panel.
10. The display panel according to claim 1,
the refractive index of the first optical structure layer is n1, and the refractive index of the second optical structure layer is n 2; wherein, the first and the second end of the pipe are connected with each other,
1.5≤n1≤2，1.2≤n2≤1.6。
11. the display panel of claim 1, further comprising an encapsulation structure layer on a side of the light emitting structure layer away from the array layer;
the optical structure layer is located on one side, close to the array layer, of the packaging structure layer, or the optical structure layer is located on one side, far away from the array layer, of the packaging structure layer.
12. The display panel according to claim 1,
the second display area is a bent display area, and the bent display area is bent towards a direction away from a light-emitting surface of the display panel.
13. A display device characterized by comprising the display panel according to any one of claims 1 to 12.
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| CN202210999272.1A CN115295744A (en) | 2020-06-28 | 2020-06-28 | Display panel and display device |
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| CN112233556B (en) * | 2020-10-29 | 2022-04-29 | 厦门天马微电子有限公司 | Display panel and display device |
| CN113066945A (en) * | 2021-03-25 | 2021-07-02 | 安徽熙泰智能科技有限公司 | Micro-display structure for improving light-emitting collimation and preparation method thereof |
| CN113130616B (en) * | 2021-04-20 | 2022-08-23 | 湖北长江新型显示产业创新中心有限公司 | Display panel and display device |
| CN113328054B (en) * | 2021-05-31 | 2022-08-09 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113394351B (en) * | 2021-06-11 | 2022-08-09 | 武汉天马微电子有限公司 | Display panel and display device |
| CN113437203A (en) * | 2021-06-28 | 2021-09-24 | 上海天马微电子有限公司 | Display panel and display device |
| CN113471388B (en) * | 2021-06-30 | 2022-08-19 | 武汉天马微电子有限公司 | Display module and display device |
| CN113690389B (en) * | 2021-08-23 | 2024-02-27 | 武汉天马微电子有限公司 | Display panel and display device |
| CN114823807A (en) * | 2022-02-07 | 2022-07-29 | 武汉华星光电半导体显示技术有限公司 | Display panel |
| CN114613813B (en) * | 2022-02-25 | 2023-08-25 | 武汉华星光电半导体显示技术有限公司 | Display device |
| CN114597324B (en) * | 2022-03-01 | 2023-05-12 | 武汉华星光电半导体显示技术有限公司 | Display device |
| CN115331561B (en) * | 2022-08-31 | 2024-01-30 | 云谷（固安）科技有限公司 | Display module and display device |
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