CN111025660B - Display panel and near-to-eye display device - Google Patents
Display panel and near-to-eye display device Download PDFInfo
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- CN111025660B CN111025660B CN201911423542.9A CN201911423542A CN111025660B CN 111025660 B CN111025660 B CN 111025660B CN 201911423542 A CN201911423542 A CN 201911423542A CN 111025660 B CN111025660 B CN 111025660B
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- 230000003287 optical effect Effects 0.000 claims description 20
- 230000000007 visual effect Effects 0.000 abstract description 4
- 239000003086 colorant Substances 0.000 description 8
- 230000003321 amplification Effects 0.000 description 7
- 238000003199 nucleic acid amplification method Methods 0.000 description 7
- ORQBXQOJMQIAOY-UHFFFAOYSA-N nobelium Chemical compound [No] ORQBXQOJMQIAOY-UHFFFAOYSA-N 0.000 description 5
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/0101—Head-up displays characterised by optical features
- G02B2027/0112—Head-up displays characterised by optical features comprising device for genereting colour display
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Abstract
The embodiment of the application provides a display panel and a near-eye display device comprising the same. The display panel comprises a first light-emitting element and a corresponding first light filtering unit, a second light-emitting element and a corresponding second light filtering unit, a third light-emitting element and a corresponding third light filtering unit. In the peripheral area, an included angle between a straight line where a central point of the first light emitting element and a central point of the corresponding first filtering unit are located and the thickness direction of the display panel is greater than 0 degree and less than 90 degrees. The light emitting area of the second light emitting element located in the peripheral region is different from the light emitting area of the second light emitting element located in the central region. The display panel and the near-to-eye display device provided by the embodiment of the application can avoid the generation of color cast problem at different visual angles, and can ensure the brightness at different visual angles.
Description
Technical Field
The application relates to the field of display, in particular to a display panel and a near-to-eye display device.
Background
Near-eye display systems, such as virtual reality display systems or augmented reality display systems, may be placed on a user's head and allow the user to view images in a display, for example, near-eye display systems may provide actual scene information to an airplane pilot or automobile pilot, while some allow the user to view displayed images while viewing the actual scene. Advances in micro-optical manufacturing have made the development of head-mounted display systems increasingly popular.
Specifically, the near-eye display system amplifies an image in the micro-optical display panel by an optical amplification system such as an optical engine and transmits the amplified image to the human eye. Because the areas of the light incident surface of the optical amplification system and the light emergent surface of the micro-optical display panel are different, the near-eye display system has higher requirements on the brightness and chromaticity uniformity of the micro-optical display panel within a certain angle.
Disclosure of Invention
In view of the foregoing, embodiments of the present application provide a display panel and a near-eye display device including the display panel.
In a first aspect, an embodiment of the present application provides a display panel, where the display panel includes a light emitting substrate and a color filter substrate that are disposed opposite to each other, and the display panel includes a central region and a peripheral region that are disposed adjacent to each other. A plurality of first light-emitting elements, a plurality of second light-emitting elements and a plurality of third light-emitting elements are arranged on the light-emitting substrate; a plurality of first light filtering units, a plurality of second light filtering units and a plurality of third light filtering units are arranged on the color film substrate. The first light-emitting element is arranged corresponding to the first filtering unit, the second light-emitting element is arranged corresponding to the second filtering unit, and the third light-emitting element is arranged corresponding to the third filtering unit. In the peripheral area, a straight line where a central point of the first light-emitting element and a central point of the corresponding first light filtering unit are located is a first straight line, an included angle between the first straight line and the thickness direction of the display panel is a first included angle, and the first included angle is larger than 0 degree and smaller than 90 degrees; the light emitting area of the second light emitting element located in the peripheral region is different from the light emitting area of the second light emitting element located in the central region.
Optionally, the light emitting area of the second light emitting element of the peripheral region is larger than the light emitting area of the second light emitting element of the central region.
Optionally, in the peripheral region, a first included angle corresponding to a first light-emitting element far away from the central region is larger than a first included angle corresponding to a first light-emitting element near the central region; the light emitting area of the second light emitting element which is round and far away from the central area is larger than the light emitting area of the second light emitting element which is close to the central area.
Optionally, in the first light emitting element, the second light emitting element, and the third light emitting element which are adjacently disposed in the peripheral region, the light emitting area of the second light emitting element is larger than the light emitting area of the first light emitting element, and the light emitting area of the first light emitting element is larger than the light emitting area of the third light emitting element.
Optionally, in the peripheral area, a straight line where a central point of the second light emitting element and a central point of the corresponding second filtering unit are located is a second straight line, an included angle between the second straight line and the thickness direction of the display panel is a second included angle, and the second included angle is greater than 0 ° and smaller than 90 °. In the peripheral area, a straight line where a central point of the third light-emitting element and a central point of the corresponding third filtering unit are located is a third straight line, an included angle between the third straight line and the thickness direction of the display panel is a third included angle, and the third included angle is larger than 0 degree and smaller than 90 degrees; in a first light emitting element, a second light emitting element and a third light emitting element which are adjacently arranged in the peripheral area, a first included angle corresponding to the first light emitting element is larger than a third included angle corresponding to the third light emitting element, and the third included angle corresponding to the third light emitting element is larger than a second included angle corresponding to the second light emitting element.
Optionally, in the central area, a straight line where a central point of the first light emitting element and a central point of the corresponding first filtering unit are located is parallel to the thickness direction of the display panel; the straight line where the central point of the second light-emitting element and the central point of the corresponding second light filtering unit are located is parallel to the thickness direction of the display panel; the straight line where the central point of the third light-emitting element and the central point of the corresponding third light filtering unit are located is parallel to the thickness direction of the display panel.
Optionally, the first filter unit and the first light emitting element correspond to a green light emitting unit, the second filter unit and the second light emitting element correspond to a blue light emitting unit, and the third filter unit and the third light emitting element correspond to a red light emitting unit.
Optionally, the first light emitting element, the second light emitting element and the third light emitting element all emit white light, the first filtering unit is a green filtering unit, the second filtering unit is a blue filtering unit, and the third filtering unit is a red filtering unit.
Alternatively, the first light emitting element emits green light, the second light emitting element emits blue light, and the third light emitting element emits red light; the first light filtering unit is a green light filtering unit, the second light filtering unit is a blue light filtering unit, and the third light filtering unit is a red light filtering unit.
Optionally, the first light emitting element, the second light emitting element and the third light emitting element are all organic light emitting elements.
In a second aspect, embodiments of the present application provide a near-eye display device including the display panel provided in the first aspect.
Optionally, the display device further includes an optical amplification system disposed on the light exit side of the display panel.
The display panel and the near-to-eye display device provided by the embodiment of the application can avoid the generation of color cast problem at different visual angles, and can ensure the brightness at different visual angles.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of a display panel provided in an embodiment of the present application;
FIG. 2 is a cross-sectional view of a display panel along direction XX' provided in an embodiment of the present application;
fig. 3 is a schematic structural diagram of a display panel provided in another embodiment of the present application;
FIG. 4 is a schematic structural diagram of a display panel provided in another embodiment of the present application;
FIG. 5 is a cross-sectional view of a portion of a central region of a display panel provided in an embodiment of the present application;
FIG. 6 is a cross-sectional view of a portion of a peripheral region of a display panel according to an embodiment of the present application;
fig. 7 is a schematic diagram of a near-eye display device provided in an embodiment of the present application.
Detailed Description
For better understanding of the technical solutions of the present application, the following detailed descriptions of the embodiments of the present application are provided with reference to the accompanying drawings.
It should be understood that the embodiments described are only a few embodiments of the present application, and not all 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 application.
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the examples of this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the description herein, it is to be understood that the terms "substantially", "approximately", "about", "substantially", and the like, as used in the claims and the examples herein, are intended to be generally accepted as not being precise, within the scope of reasonable process operation or tolerance.
It should be understood that although the terms first, second, third, etc. may be used to describe the display regions in the embodiments of the present application, the display regions should not be limited to these terms. These terms are only used to distinguish the display areas from each other. For example, the first display region may also be referred to as a second display region, and similarly, the second display region may also be referred to as a first display region without departing from the scope of the embodiments of the present application.
The applicant provides a solution to the problems of the prior art through intensive research.
In an embodiment of the present application, a display panel is provided, as shown in fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic view of the display panel provided in the embodiment of the present application, fig. 2 is a cross-sectional view of the display panel provided in one embodiment of the present application along the XX' direction, and fig. 3 is a schematic structural view provided in another embodiment of the present application. As shown in fig. 1, the display panel provided in the embodiment of the present application includes a light emitting substrate 01 and a color filter substrate 02, and the light emitting substrate 01 and the color filter substrate 02 are disposed opposite to each other. As shown in fig. 2, a plurality of first light-emitting elements 101a/101b/101c, a plurality of second light-emitting elements 102a/102b/102c, and a plurality of third light-emitting elements 103a/103b/103c are provided on the light-emitting substrate 01; a plurality of first filter units 201, a plurality of second filter units 202, and a plurality of third filter units 203 are disposed on the color filter substrate 02.
The first light emitting elements 101a/101b/101c are disposed corresponding to the first filter unit 201, the second light emitting elements 102a/102b/102c are disposed corresponding to the second filter unit 202, and the third light emitting elements 103a/103b/103c are disposed corresponding to the third filter unit 203. It is understood that the light emitting substrate 01 serves to emit light; the color filter substrate 02 filters light emitted from the light-emitting substrate 01.
Further, the display panel includes a central region CC and a peripheral region BB disposed adjacently. Further, the central region CC is disposed adjacent to and inside the peripheral region BB. Alternatively, the peripheral region BB may surround the central region CC. As shown in fig. 1, in an embodiment of the present application, the central region CC and the peripheral region BB are both display regions, the display panel may further include a non-display region AA, and the non-display region AA is disposed outside the display region. Optionally, the peripheral area BB in the display area surrounds the central area CC, and the non-display area AA surrounds the peripheral area BB.
Specifically, as shown in fig. 2 and 3, in the peripheral area BB, a straight line where a central point of the first light emitting element 101a/101b and a central point of the corresponding first filtering unit 201 are located is a first straight line, an included angle between the first straight line and the thickness direction M of the display panel is a first included angle, and the first included angle is greater than 0 ° and smaller than 90 °. Fig. 2 and 3 schematically show only a part of the peripheral region BB and a part of the central region CC.
Specifically, referring to fig. 2 and fig. 3, the first light-emitting device in the peripheral region BB includes first light- emitting devices 101a and 101b, and the first light-emitting device 101 in the central region CC includes 101 c. In the peripheral area BB, a first included angle between a first straight line L1a where a central point of the first light emitting element 101a and a central point of the corresponding first filtering unit 201 are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °; and a first included angle between a first straight line L1b where a central point of the first light emitting element 101b and a central point of the corresponding first filter unit 201 are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °. Specifically, in the central region CC, an included angle between a straight line L1c where a central point of the first light emitting element 101c and a central point of the corresponding first filter unit 201 are located and the thickness direction M of the display panel is 0 °. That is, the center point of the first light emitting element 101a/101b located in the peripheral region BB and the center point of the corresponding first filter unit 201 are offset in the thickness direction of the display panel, while the center point of the first light emitting element 101c located in the central region CC and the center point of the corresponding first filter unit 201 are not offset in the thickness direction of the display panel. Specifically, in fig. 2, a first included angle between a first straight line L1a where a center point of the first light emitting element 101a and a center point of the corresponding first filter unit 201 are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °, and a first straight line L1a where the center point of the first light emitting element 101a and the center point of the corresponding first filter unit 201 are located is deviated to the side of the center region CC. In fig. 3, a first included angle between a first straight line L1a where a central point of the first light emitting element 101a and a central point of the corresponding first filter unit 201 are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °, and a first straight line L1a where the central point of the first light emitting element 101a and the central point of the corresponding first filter unit 201 are located is deviated to a side away from the central region CC. That is, in the structure shown in fig. 2, the first light emitting element 101a is offset in a direction away from the central region CC with respect to the first filter unit 201; in the structure shown in fig. 3, the first light emitting element 101a is offset in a direction closer to the central region CC with respect to the first filter unit 201.
In the case of a front viewing angle, the display panel is generally free from color shift. Since the attenuation of light of different colors has different effects on white light, a problem of color shift occurs when the viewing angle deviates from the main optical axis of the light emitting unit in the display panel. In the embodiment of the present invention, the centers of the first light emitting elements 101a/10b in the peripheral area BB and the corresponding first filter units 201 are shifted in the thickness direction M of the display panel, that is, the main optical axes of the light emitting units corresponding to the first light emitting elements 101a/101b and the first filter units 201 are changed for different viewing angles, so as to reduce the color shift problem at different viewing angles. In both the configurations shown in fig. 2 and 3, the main optical axes of the light emitting units corresponding to the first light emitting elements 101a and 101b and the first filter unit 201 are changed, and only the directions of the shifts are different.
At a front viewing angle, there is a possibility that the viewing angle may be too large or too small compared to the display panel, for example, the area of the light incident surface of the optical amplifying system in the near-eye display device may be too large or too small compared to the area of the light emitting surface of the display panel. When the viewing angle is too large or too small compared to the display area of the display panel, the tilt angle between the main optical axis of the display unit in the peripheral area BB and the viewing angle is large, but in both cases, the offset direction of the first light emitting element 101a/101b and the corresponding first filter unit 201 should be different. As shown in fig. 2, when the viewing angle is too small and is biased to the central region CC, the straight line M where the central point of the first light emitting element 101a/101b in the peripheral region BB and the central point of the corresponding first filter unit 201 are located is inclined toward the central region CC, so as to ensure that the main optical axis of the light emitting unit corresponding to the first light emitting element 101a/101b in the peripheral region BB is inclined toward the viewing angle, thereby avoiding the color shift problem. As shown in fig. 3, when the viewing angle is expanded from the central region CC to the outside of the peripheral region BB, the straight line M where the central point of the first light emitting element 101a/101b and the central point of the corresponding first filter unit 201 are located is inclined in a direction away from the central region CC, so that the main optical axis of the light emitting unit corresponding to the first light emitting element 101a/101b in the peripheral region BB is ensured to be inclined to the position where the viewing angle is located, thereby avoiding the color shift problem.
The viewing angle characteristics of the light emitting units corresponding to the first light emitting elements 101a/101b/101c and/or the first filter unit 201 are such that, as the viewing angle changes, the light emitting units generate a larger color shift than the light emitting units corresponding to the second light emitting elements 102a/102b/102c and/or the second filter unit 202, the light emitting units corresponding to the third light emitting elements 103a/103b/103c and/or the third filter unit 203, and therefore, preferably, the color shift can be effectively improved by changing the shifts of the first light emitting elements 101a/101b and the corresponding first filter units 201. In an embodiment of the present application, the first filter unit 201 and the first light emitting elements 101a/101b/101c correspond to a green light emitting unit, the second filter unit 202 and the second light emitting elements 102a/102b/102c correspond to a blue light emitting unit, and the third filter unit 203 and the third light emitting elements 103a/103b/103c correspond to a red light emitting unit. That is, in the embodiment of the present application, the center points of both the first filter unit 201 and the first light emitting elements 101a/101b in the green light emitting units disposed in the peripheral area BB are designed to have a certain offset amount. Since the human eye is most sensitive to green light, the color shift associated with a change in viewing angle is most severe. Therefore, in the peripheral area BB, the main optical axes of the first light emitting elements 101a/10b and the first filter unit 201 corresponding to the green light emitting units correspond to the viewing angles, so that color shift can be effectively avoided.
Further, as shown in fig. 2 and 3, the light emitting areas of the second light emitting elements 102a and 102b located in the peripheral region BB are different from the light emitting area of the second light emitting element 102c located in the central region CC. Specifically, the second light emitting elements located in the peripheral region BB include the second light emitting elements 102a and 102b, and the second light emitting element 102 located in the central region CC includes 102c, wherein the peripheral region BB includes the second light emitting elements 102a and 102b having a light emitting area different from that of the second light emitting element 102c included in the central region CC. When there is an oblique angle between the viewing angle and the display panel, the brightness of the light obtained from the viewing angle deviated from the display panel is reduced, and the offset design of the first light-emitting elements 101a/101b and the corresponding first filter units 201 in the peripheral area BB also affects the brightness of the display units corresponding to the first light-emitting elements 101a/101b in the peripheral area BB. By changing the light emitting areas corresponding to the second light emitting elements 102a/102b in the peripheral area BB, the area of the light emitting unit at the peripheral area BB of the display panel can be increased, so that the intensity of the light captured at a viewing angle deviated from the display panel can also be enhanced. Note that the light-emitting units corresponding to the second light-emitting elements 102a, 102b, and 102c emit light of different colors from the light-emitting units corresponding to the first light-emitting elements 101a, 101b, and 101 c.
Meanwhile, it is preferable that the viewing angle characteristics of the light emitting units corresponding to the second light emitting elements 102a/102b/102c and/or the second filter unit 202 are such that, as the viewing angle changes, the luminance change thereof is smaller than that of the light emitting units corresponding to the first light emitting elements 101a/101b/101c and/or the first filter unit 201, and thus the luminance decay can be effectively avoided by changing the light emitting area of the second light emitting element 102.
In an embodiment of the present application, please refer to fig. 2 and fig. 3, the light emitting area of the second light emitting device 102a/102b disposed in the peripheral region BB is larger than the light emitting area of the second light emitting device 102c disposed in the central region CC.
Alternatively, the light emitting cell density of the display panel may be secured by changing only the light emitting area of the second light emitting elements 102a/102 b. The density of the light emitting cells is the density of the light emitting cells per unit area, and the densities of the light emitting elements and the filter cells are the same as the density of the light emitting cells. To increase the light emitting area of the light emitting elements, it is possible to reduce the density of the light emitting elements or to reduce the gap width between the light emitting elements. If the density of the light emitting elements is reduced, the density of the light emitting units is reduced, which significantly reduces the display quality of the display panel. Therefore, when the area of the light emitting elements is increased, it is preferable to reduce the gap between the light emitting elements, and the color mixing problem caused by the excessively small gap between the light emitting elements is avoided, and it is ensured that the gap between the light emitting elements is not excessively small by changing only the light emitting area of the second light emitting elements 102a/102b, and it is not necessary to reduce the density of the light emitting elements, that is, the density of the light emitting units is ensured.
Meanwhile, the light emitting area of the second light emitting elements 102a/102b corresponding to the blue light emitting cells disposed in the peripheral region BB is designed to be larger than the light emitting area of the second light emitting element 102c corresponding to the blue light emitting cells in the central region CC. Because the influence of the brightness change of the green light-emitting unit and the blue light-emitting unit on the color cast is larger than that of the red light-emitting unit, when the color cast is influenced due to the brightness attenuation caused by the offset design of the green light-emitting unit, the color cast problem can be corrected by increasing the brightness of the blue light-emitting unit to compensate the brightness attenuation of the green light-emitting unit. Therefore, increasing the light emitting area of the second light emitting elements 102a/102b corresponding to the blue light emitting cells of the peripheral region BB can effectively increase the luminance when the viewing angle deviates from the peripheral region BB.
Specifically, the first light-emitting elements 101a/101b/101c, the second light-emitting elements 102a/102b/102c, and the third light-emitting elements 103a/103b/103c may all be organic light-emitting elements.
Alternatively, the first light emitting elements 101a/101b/101c, the second light emitting elements 102a/102b/102c, and the third light emitting elements 103a/103b/103c may all emit white light, and then the first filter unit 201 is a green filter unit, the second filter unit 202 is a blue filter unit, and the third filter unit 203 is a red filter unit. That is, white light emitted from the plurality of first light emitting elements 101a/101b/101c, the plurality of second light emitting elements 102a/102b/102c, and the plurality of third light emitting elements 103a/103b/103c disposed on the light emitting substrate 01 passes through the plurality of first filter units 201, the second filter units 202, and the third filter units 203 disposed on the color filter substrate 02 to be converted into light of three colors, i.e., green, blue, and red.
Alternatively, the first light emitting elements 101a/101b/101c emit green light, the second light emitting elements 102a/102b/102c emit blue light, and the third light emitting elements 103a/103b/103c emit red light. At this time, the first filter unit 201 is a green filter unit, the second filter unit 202 is a blue filter unit, and the third filter unit 203 is a red filter unit, so that the light colors of the three colors of red, green, and blue emitted by the light-emitting substrate 01 can be more pure.
In a preferred embodiment of the present application, please continue to refer to fig. 2 and fig. 3, in the peripheral region BB, a first included angle corresponding to the first light emitting element 101a far away from the central region CC is larger than a first included angle corresponding to the first light emitting element 101b near the central region CC; and the light emitting area of the second light emitting element 102a distant from the center region CC is larger than the light emitting area of the second light emitting element 102b close to the center region CC. Specifically, in the peripheral area BB, a first included angle corresponding to the first filter unit 201 and the first light emitting element 101a in the green light emitting unit far from the central area CC is larger than a first included angle corresponding to the first filter unit 201 and the first light emitting element 101b in the green light emitting unit near the central area CC. Specifically, in the peripheral region BB, the light emission area of the second light-emitting element 102a in the blue light-emitting unit distant from the central region CC is larger than the light emission area of the second light-emitting element 102b in the blue light-emitting unit close to the central region CC.
Specifically, as shown in fig. 2 and 3, in the peripheral region BB, a first included angle between a first straight line L1a, where a central point of the first light-emitting element 101a far from the central region CC and a central point of the corresponding first filter unit 201 are located, and the thickness direction M of the display panel is greater than a first included angle between a first straight line L1b, where a central point of the first light-emitting element 101b near the central region CC and a central point of the corresponding first filter unit 201 are located, and the thickness direction M of the display panel. That is, in the peripheral region BB, a first included angle between a first straight line L where a center point of the first light emitting element 101a located farther from the center region CC and a center point of the corresponding first filter unit 201 are located and the thickness direction M of the display panel is larger. The farther the peripheral area BB from the edge of the central area CC, the larger the tilt angle between the viewing angle and the display panel, and accordingly the more the center point of the first light emitting element 101a should be shifted from the center point of the corresponding first filter unit 201, so as to ensure that the color shift problem can be reduced completely.
Specifically, as shown in fig. 2 and 3, in the peripheral region BB, the light-emitting area of the second light-emitting element 102a distant from the central region CC is larger than the light-emitting area of the second light-emitting element 102b close to the central region CC. That is, in the peripheral region BB, the light-emitting area of the second light-emitting element 102a farther from the central region CC is larger. That is, the decrease in luminance is compensated for by adaptively increasing the light-emitting area of the second light-emitting element 102a in accordance with the shift amount corresponding to the first light-emitting element 101a in the peripheral region BB.
Further, referring to fig. 4, fig. 4 is a schematic structural diagram of a display panel according to still another embodiment of the present disclosure, in a peripheral area BB, among a first light emitting element 101a/101b, a second light emitting element 102a/102b and a third light emitting element 103a/103b which are adjacently disposed, a light emitting area of the second light emitting element 102a is larger than a light emitting area of the first light emitting element 101a and a light emitting area of the first light emitting element 101a is larger than a light emitting area of the third light emitting element 103a, a light emitting area of the second light emitting element 102b is larger than a light emitting area of the first light emitting element 101b and a light emitting area of the first light emitting element 101b is larger than a light emitting area of the third light emitting element 103 b. Specifically, as shown in fig. 4, of the one first light-emitting element 101a, the one second light-emitting element 102a, and the one third light-emitting element 103a included in the light-emitting element unit in the peripheral region BB, the second light-emitting element 102a having the largest light-emitting area is located next to the first light-emitting element 101a, and the third light-emitting element 103a having the smallest area is located next to the first light-emitting element 101 a. The emission color of the light-emitting unit corresponding to the third light-emitting element 103a/103b/203c is different from the emission color of the light-emitting unit corresponding to the first light-emitting element 101a/101b/101c and the second light-emitting element 102a/102b/102 c. Meanwhile, it is preferable that the viewing angle characteristics of the light emitting units corresponding to the first light emitting elements 101a/101b/101c further include that the luminance change of the light emitting units corresponding to the third light emitting elements 103a/103b/203c is smaller as the viewing angle changes, so that the luminance degradation can be more effectively avoided by simultaneously changing at least the light emitting areas of the second light emitting elements 102a/102b and the first light emitting elements 101a/101 b. Of course, the light-emitting areas of the first light-emitting elements 101a and 101b, the second light-emitting elements 102a and 102b, and the third light-emitting elements 103a and 103b may be changed at the same time.
In an embodiment of the present application, please refer to fig. 5, and fig. 5 is a cross-sectional view of a central region of a display panel provided in an embodiment of the present application. As shown in fig. 5, in the central region CC, a straight line L1c where the central point of the first light emitting element 101c and the central point of the corresponding first filter unit 201 are located is parallel to the thickness direction M of the display panel; in the central region CC, a straight line L2c where the central point of the second light emitting element 102c and the central point of the corresponding second filtering unit 202 are located is parallel to the thickness direction M of the display panel; in the central region CC, a straight line L3c where the center point of the third light emitting element 103c and the center point of the corresponding third filter unit 203 are located is parallel to the thickness direction M of the display panel. That is, in the central region CC, the central point of the first light emitting element 101c is aligned with the central point of the corresponding first filter unit 201 in the thickness direction M of the display panel, the central point of the second light emitting element 102c is aligned with the central point of the corresponding second filter unit 202 in the thickness direction M of the display panel, and the central point of the third light emitting element 103c is aligned with the central point of the corresponding third filter unit 203 in the thickness direction M of the display panel.
In an embodiment of the present application, please refer to fig. 6, and fig. 6 is a cross-sectional view of a portion of a peripheral area of a display panel provided in an embodiment of the present application.
In the peripheral area BB, a straight line where a center point of the second light emitting element 102a/102b and a center point of the corresponding second filtering unit 202 are located is a second straight line, an included angle between the second straight line and the thickness direction M of the display panel is a second included angle, and the second included angle is greater than 0 ° and smaller than 90 °. Specifically, as illustrated by way of example in fig. 6, the second light emitting elements 102a and 102b in the peripheral area BB, a second included angle between a second straight line L2a where a central point of the second light emitting element 102a and a central point of the corresponding second filtering unit 202 are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °; in the peripheral area BB, a second included angle between a second straight line L2b where a center point of the second light emitting element 102b and a center point of the corresponding second filtering unit 202 are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °.
In the peripheral area BB, a straight line where a center point of the third light emitting element 103a/103b and a center point of the corresponding third filtering unit 203 are located is a third straight line, an included angle between the third straight line and the thickness direction M of the display panel is a third included angle, and the third included angle is greater than 0 ° and smaller than 90 °. Specifically, as illustrated by way of example as the third light emitting elements 103a and 103b in the peripheral area BB shown in fig. 6, in the peripheral area BB, a third angle between a third straight line L3a where a central point of the third light emitting element 103a and a central point of the third filter unit 203 for drinking are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °; in the peripheral area BB, a third angle between a third straight line L3b where the center point of the third light emitting element 103b and the center point of the corresponding third filtering unit 203 are located and the thickness direction M of the display panel is greater than 0 ° and less than 90 °.
That is, in order to improve the problem of color shift, in the peripheral region BB, the center points of the first light emitting elements 101a/101b, the second light emitting elements 102a/102b, and the third light emitting elements 103a/103b are set to be offset from the center points of the corresponding first filter unit 201, second filter unit 202, and third filter unit 203 in the display panel thickness direction M.
Further, referring to fig. 6, in the peripheral area BB, in the first light emitting element 101a, the second light emitting element 102a, and the third light emitting element 103a that are adjacently disposed, a first included angle corresponding to the first light emitting element 101a is greater than a third included angle corresponding to the third light emitting element 103a, and a third included angle corresponding to the third light emitting element 103a is greater than a second included angle corresponding to the second light emitting element 102 a. In the peripheral area BB, in the first light emitting element 101b, the second light emitting element 102b, and the third light emitting element 103b which are adjacently disposed, a first included angle corresponding to the first light emitting element 101b is larger than a third included angle corresponding to the third light emitting element 103b, and a third included angle corresponding to the third light emitting element 103b is larger than a second included angle corresponding to the second light emitting element 102 b.
Specifically, as shown in fig. 6, in the peripheral area BB, one first light-emitting element 101a, one second light-emitting element 102a, and one third light-emitting element 103a that are adjacent and arranged in sequence may be used as one light-emitting element unit, and in the light-emitting element units arranged in the peripheral area BB, the first included angle corresponding to the first light-emitting element 101a is the largest, and the third included angle corresponding to the third light-emitting element 103a is also larger than the second included angle corresponding to the second light-emitting element 102 a. As shown in fig. 6, in the first light emitting element 101a, the second light emitting element 102a and the third light emitting element 103a included in the leftmost light emitting element unit, an included angle between a straight line L1a where a center point of the first light emitting element 101a and a center point of the corresponding first filter unit 201 are located and the thickness direction M of the display panel is the largest, an included angle between a straight line L2a where a center point of the second light emitting element 102a and a center point of the corresponding second filter unit 202 are located and the thickness direction M of the display panel is the smallest, and an included angle between a straight line L3a where a center point of the third light emitting element 103a and a center point of the corresponding third filter unit 203 are located and the thickness direction M of the display panel is between them.
The emission color of the light-emitting unit corresponding to the third light-emitting element 103a/103b/103c is different from the emission color of the light-emitting unit corresponding to the first light-emitting element 101a/101b/101c and the second light-emitting element 102a/102b/102 c. Meanwhile, it is preferable that the viewing angle characteristics of the light emitting units corresponding to the third light emitting elements 103a/103b/103c are such that, as the viewing angle changes, a larger color shift is generated compared to the light emitting units corresponding to the second light emitting elements 102a/102b/102c, so that the color shift can be effectively improved by changing the corresponding shift of the first light emitting elements 101a/101b and the corresponding shift of the third light emitting elements 103a/103 b. Of course, the first light emitting element, the second light emitting element and the third light emitting element may be designed to be offset at the same time. Specifically, the first light emitting elements 101a/101b/101c correspond to green light emitting units, the second light emitting elements 102a/102b/102c correspond to blue light emitting units, and the third light emitting elements 103a/103b/103c correspond to red light emitting units, and when the viewing angle is changed, the green light emitting units have a larger influence on the color shift problem than the red light emitting units, and the red light emitting units have a larger influence on the color shift problem than the blue light emitting units. Therefore, according to different influence degrees of the light-emitting units with various colors on the color cast problem, the light-emitting unit with a certain color or the light-emitting units with a certain number of colors can be selectively designed in an offset mode.
Correspondingly, the light emitting areas of the first light emitting elements 101a/101b and the second light emitting elements 102a/102b in the peripheral region BB can be increased compared to the central region CC. In the peripheral region BB, the light-emitting area of the second light-emitting elements 102a/102b is preferably designed to be larger than the light-emitting area of the first light-emitting elements 101a/101b, and the light-emitting area of the first light-emitting elements 101a/101b is preferably designed to be larger than the light-emitting area of the third light-emitting elements 103a/103 b. Since the luminance variation of the blue light emitting unit has a greater influence on the color shift problem than the green light emitting unit, the green light emitting unit has a greater influence on the color shift problem than the red light emitting unit. Therefore, the light-emitting area of the light-emitting element in a certain color light-emitting unit or a certain number of color light-emitting units can be selectively adjusted according to different influence degrees of brightness change of the light-emitting units with various colors on the color cast problem.
In an embodiment of the present application, a near-eye display device is further provided, as shown in fig. 7, and fig. 7 is a schematic view of a near-eye display device provided in an embodiment of the present application. As shown in fig. 7, the near-eye display device includes the display panel 001 and the optical magnification system 002 provided in any of the above embodiments, wherein the optical magnification system 002 is provided on the light exit side of the display panel 001. Specifically, the light emitting surface of the display panel 001 is opposite to the light incident surface of the optical amplification system 002, and the optical amplification system 002 amplifies the light of the display panel 001 captured by the light incident surface and transmits the amplified light to the light emitting side of the optical amplification system 002, so that the light can be seen by the observer. The near-to-eye display device provided by the embodiment of the application can avoid the optical system 002 from collecting and amplifying the light with color cast when the size of the light incident surface of the optical amplification system 002 is different from that of the light emergent surface of the display panel 001, and meanwhile, the brightness can be ensured.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.
Claims (12)
1. The display panel is characterized by comprising a light-emitting substrate and a color film substrate, wherein the light-emitting substrate and the color film substrate are arranged oppositely, and the display panel comprises a central area and a peripheral area which are arranged adjacently;
a plurality of first light-emitting elements, a plurality of second light-emitting elements and a plurality of third light-emitting elements are arranged on the light-emitting substrate;
a plurality of first light filtering units, a plurality of second light filtering units and a plurality of third light filtering units are arranged on the color film substrate; the first light-emitting element is arranged corresponding to the first filtering unit, the second light-emitting element is arranged corresponding to the second filtering unit, and the third light-emitting element is arranged corresponding to the third filtering unit;
in the peripheral area, a straight line where a central point of the first light-emitting element and a central point of the corresponding first light filtering unit are located is a first straight line, an included angle between the first straight line and the thickness direction of the display panel is a first included angle, and the first included angle is larger than 0 degree and smaller than 90 degrees; the viewing angle characteristic of the light emitting unit corresponding to the first filtering unit is that the light emitting unit corresponding to the second filtering unit and the light emitting unit corresponding to the third filtering unit generate larger color shift as the viewing angle changes;
the light emitting area of the second light emitting element positioned in the peripheral region is different from the light emitting area of the second light emitting element positioned in the central region; the viewing angle characteristic of the light emitting unit corresponding to the second filtering unit is that the brightness change of the light emitting unit corresponding to the second filtering unit is smaller than that of the light emitting unit corresponding to the first filtering unit along with the change of the viewing angle.
2. The display panel according to claim 1, wherein a light emitting area of the second light emitting element in the peripheral region is larger than a light emitting area of the second light emitting element in the central region.
3. The display panel according to claim 2, wherein in the peripheral region, the first included angle corresponding to the first light-emitting element farther from the central region is larger than the first included angle corresponding to the first light-emitting element closer to the central region; the light emitting area of the second light emitting element far from the central region is larger than the light emitting area of the second light emitting element near the central region.
4. The display panel according to claim 2, wherein a light-emitting area of the second light-emitting element is larger than a light-emitting area of the first light-emitting element, and a light-emitting area of the first light-emitting element is larger than a light-emitting area of the third light-emitting element, among the first light-emitting element, the second light-emitting element, and the third light-emitting element which are provided adjacent to the peripheral region.
5. The display panel according to claim 1,
in the peripheral area, a straight line where a central point of the second light emitting element and a central point of the corresponding second light filtering unit are located is a second straight line, an included angle between the second straight line and the thickness direction of the display panel is a second included angle, and the second included angle is larger than 0 degree and smaller than 90 degrees;
in the peripheral area, a straight line where a central point of the third light emitting element and a central point of the corresponding third light filtering unit are located is a third straight line, an included angle between the third straight line and the thickness direction of the display panel is a third included angle, and the third included angle is larger than 0 degree and smaller than 90 degrees;
in the first light emitting element, the second light emitting element and the third light emitting element which are adjacently arranged in the peripheral area, the first included angle corresponding to the first light emitting element is larger than the third included angle corresponding to the third light emitting element, and the third included angle corresponding to the third light emitting element is larger than the second included angle corresponding to the second light emitting element.
6. The display panel according to claim 5, wherein in the central region, a straight line where a central point of the first light emitting element and a central point of the corresponding first filter unit are located is parallel to a thickness direction of the display panel;
a straight line where the central point of the second light emitting element and the central point of the corresponding second filter unit are located is parallel to the thickness direction of the display panel;
the straight line where the central point of the third light-emitting element and the central point of the corresponding third filter unit are located is parallel to the thickness direction of the display panel.
7. The display panel according to claim 1, wherein the first filter unit and the first light emitting element correspond to a green light emitting unit, the second filter unit and the second light emitting element correspond to a blue light emitting unit, and the third filter unit and the third light emitting element correspond to a red light emitting unit.
8. The display panel according to claim 7, wherein the first light emitting element, the second light emitting element and the third light emitting element all emit white light, the first filter unit is a green filter unit, the second filter unit is a blue filter unit, and the third filter unit is a red filter unit.
9. The display panel according to claim 7, wherein the first light-emitting element emits green light, the second light-emitting element emits blue light, and the third light-emitting element emits red light; the first light filtering unit is a green light filtering unit, the second light filtering unit is a blue light filtering unit, and the third light filtering unit is a red light filtering unit.
10. The display panel according to claim 1, wherein the first light-emitting element, the second light-emitting element, and the third light-emitting element are all organic light-emitting elements.
11. A near-eye display device comprising the display panel according to any one of claim 1 to claim 10.
12. The near-eye display device of claim 11, further comprising an optical magnification system disposed on a light exit side of the display panel.
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