[go: up one dir, main page]

CN112785926B - Cover plate, display panel and manufacturing method of cover plate - Google Patents

Cover plate, display panel and manufacturing method of cover plate Download PDF

Info

Publication number
CN112785926B
CN112785926B CN202011640113.XA CN202011640113A CN112785926B CN 112785926 B CN112785926 B CN 112785926B CN 202011640113 A CN202011640113 A CN 202011640113A CN 112785926 B CN112785926 B CN 112785926B
Authority
CN
China
Prior art keywords
refractive index
film layer
cover plate
light
index film
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202011640113.XA
Other languages
Chinese (zh)
Other versions
CN112785926A (en
Inventor
顾跃凤
宁春丽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Tianma Microelectronics Co Ltd
Original Assignee
Shanghai Tianma Microelectronics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Tianma Microelectronics Co Ltd filed Critical Shanghai Tianma Microelectronics Co Ltd
Priority to CN202011640113.XA priority Critical patent/CN112785926B/en
Publication of CN112785926A publication Critical patent/CN112785926A/en
Application granted granted Critical
Publication of CN112785926B publication Critical patent/CN112785926B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G02B1/11—Anti-reflection coatings
    • G02B1/113—Anti-reflection coatings using inorganic layer materials only
    • G02B1/115—Multilayers

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Abstract

The embodiment of the application discloses a cover plate, a display panel and a manufacturing method of the cover plate. A first aspect of an embodiment of the present application provides a cover plate for a display panel, including: the substrate is provided with a light incident surface and a light emergent surface which are opposite to each other in the thickness direction of the substrate; the antireflection film is arranged on at least one of the light incident surface and the light emergent surface and is provided with a first refractive index film layer and a second refractive index film layer, the refractive index of the first refractive index film layer is greater than that of the second refractive index film layer, and the first refractive index film layer and the second refractive index film layer are alternately stacked on the light incident surface and/or the light emergent surface; in at least one antireflection film, the difference between the refractive indexes of the first refractive index film layer and the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing or decreasing manner from the central area to the edge area of the cover plate in at least one direction parallel to the light emitting surface. The visual impression of the user is improved, and the display effect of the display panel is improved.

Description

Cover plate, display panel and manufacturing method of cover plate
Technical Field
The invention relates to the field of display, in particular to a cover plate, a display panel and a manufacturing method of the cover plate.
Background
With the continuous development of display technology, the visual demand of people for display products is gradually increased. However, since the reflectivity of the same light beam is not uniform at all positions on the curved display panel, the brightness of light reflected from all positions of the curved display panel received by a user is not uniform, and the visual impression of the user is affected. In other cases, the user's visual perception at oblique viewing angles of the flat display panel is inferior to the user's visual perception at normal viewing angles of the flat display panel, since the greater the angle of incidence of ambient light into the flat display panel, the higher the reflectivity.
Therefore, a cover plate, a display panel and a method for manufacturing the cover plate are urgently needed.
Disclosure of Invention
A first aspect of an embodiment of the present application provides a cover plate for a display panel, including:
the substrate is provided with a light incident surface and a light emergent surface which are opposite to each other in the thickness direction of the substrate;
the antireflection film is arranged on at least one of the light incident surface and the light emergent surface and is provided with a first refractive index film layer and a second refractive index film layer, the refractive index of the first refractive index film layer is greater than that of the second refractive index film layer, and the first refractive index film layer and the second refractive index film layer are alternately stacked on the light incident surface and/or the light emergent surface;
in at least one antireflection film, the difference between the refractive indexes of the first refractive index film layer and the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing or decreasing manner from the central area to the edge area of the cover plate in at least one direction parallel to the light emitting surface. When the cover plate provided by the first aspect of the embodiment of the application is applied to the curved surface display panel, the reflectivity of the same light beam in at least one direction of the curved surface display panel is basically consistent, the cover plate has the performance of low reflectivity and high transmittance, and the visual effect of a user when the curved surface display panel is used is improved. When the apron that this application embodiment first aspect provided is applied to flat display panel, can promote the user's that is in display panel slope visual angle vision impression, avoid influencing visual effect because of the reflection of ambient light for the user that is in display panel's normal visual angle and slope visual angle all can obtain good vision impression.
A second aspect of the embodiments of the present application provides a display panel, including:
a display substrate having a light emitting surface;
the cover plate is disposed on the light emitting surface side of the display substrate, and the substrate is closer to the display substrate than the antireflection film.
When the display panel of the second aspect of the embodiment of the present application is a curved display panel, the reflectivity of the light beam in at least one direction of the display panel is substantially the same, so that the viewing angle impression of the user at each position of the display surface of the display panel is ensured. When the display panel of the second aspect of the embodiment of the application is a flat display panel, the reflectivity of the ambient light with a large incident angle is reduced, and the situation that a user at an oblique viewing angle of the display panel receives reflected light with a large reflectivity is avoided, so that the user at a normal viewing angle and an oblique viewing angle of the display panel can obtain good visual impression when the flat display panel is used.
A third aspect of the embodiments of the present application provides a method for manufacturing a cover plate, including:
providing a substrate, wherein the substrate is provided with a light incident surface and a light emergent surface which are opposite to each other in the thickness direction of the substrate;
forming an antireflection film, alternately preparing N first refractive index film layers and N second refractive index film layers on the light incident surface and/or the light emergent surface to correspondingly form N antireflection films which are stacked, wherein N is greater than or equal to 1 and is an integer, the refractive index of the first refractive index film layer is greater than that of the second refractive index film layer,
in at least one antireflection film, in the thickness direction of the antireflection film, the difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer is distributed in an increasing or decreasing manner from the central area to the edge area of the cover plate in at least one direction parallel to the light emitting surface.
The cover plate obtained by the method for manufacturing the cover plate in the third aspect of the embodiment of the present application has the performance of low reflectivity and high transmittance. The cover plate obtained by the manufacturing method is applied to a curved surface display panel and a flat surface display panel, and is beneficial to improving the visual impression of a user.
Drawings
Other features, objects and advantages of the present invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, with reference to the accompanying drawings in which like or similar reference characters refer to like or similar parts and which are not necessarily drawn to scale.
FIG. 1 is a diagram of the optical path of a parallel beam of ambient light incident on the cover plate of a display panel with a generally concave curvature;
FIG. 2 is a diagram of a beam of parallel ambient light incident on a cover plate of a typical convex-curved display panel;
FIG. 3 is a diagram of a cover plate light path of a parallel beam of ambient light incident on a generally planar display panel;
FIG. 4 is a schematic diagram of at least a partial layer structure of a cover plate of a display panel according to a first aspect of an embodiment of the present disclosure;
FIG. 5 is a schematic diagram of at least a partial layer structure of a cover plate of a concave display panel according to a first aspect of an embodiment of the present disclosure;
FIG. 6 is a schematic diagram of at least a partial layer structure of a cover plate of a concave display panel according to a first aspect of the present disclosure;
FIG. 7 is a schematic diagram illustrating at least a partial layer structure of a cover plate of another concave display panel according to the first aspect of the present application;
FIG. 8 is a schematic diagram of at least a partial layer structure of a cover plate of a concave curved display panel according to the first aspect of the present disclosure;
FIG. 9 is a schematic diagram illustrating at least a partial layer structure of a cover plate of a concave display panel according to a first aspect of an embodiment of the present disclosure;
FIG. 10 is a graph of wavelength of light versus reflectance for the first set of experiments in the first aspect of the example of the present application at an incident angle of 0 ° in comparative example 1 and Experimental example 1;
FIG. 11 is a graph showing the relationship between the wavelength of light and the reflectance and transmittance at an incident angle of 0 ° in Experimental example 1 in the first set of experiments in the first aspect of the embodiments of the present application;
FIG. 12 is a schematic diagram illustrating at least a partial layer structure of a cover plate of a concave display panel according to a first aspect of an embodiment of the present application;
FIG. 13 is a diagram illustrating the relationship between the incident angle of incident light and the reflection angle of reflected light and the viewing angle in the second set of experiments in the embodiment of the present application;
FIG. 14 is a graph showing the relationship between the viewing angle and the reflectance of the reflected light of Experimental example 2 and comparative example 2 in the second set of experiments in the examples of the present application;
FIG. 15 is a schematic diagram of the positions of the hue coordinates corresponding to the reflected lights of experimental example 2 and comparative example 2 in the second set of experiments in the example of the present application;
FIG. 16 is a schematic diagram of at least a partial layer structure of a cover plate of a convexly curved display panel according to a first aspect of an embodiment of the present disclosure;
FIG. 17 is a schematic diagram illustrating at least a partial layer structure of a cover plate of a convex display panel according to still another embodiment of the present disclosure;
FIG. 18 is a schematic diagram illustrating at least a partial layer structure of a cover plate of another display panel with convex curved surface according to the first aspect of the embodiment of the present application;
FIG. 19 is a schematic diagram illustrating at least a partial layer structure of a cover plate of a concave display panel according to a first aspect of an embodiment of the present application;
FIG. 20 is a schematic diagram illustrating at least a partial layer structure of a cover plate of a concave display panel according to still another embodiment of the present disclosure;
FIG. 21 is a schematic diagram of an apparatus for manufacturing a cover plate by spray coating in accordance with a third aspect of an embodiment of the present application;
FIG. 22 is a schematic structural diagram of an apparatus for manufacturing a cover plate by photolithography in accordance with a third aspect of an embodiment of the present application.
In the figure:
a cover plate-1; a substrate-12; a light incident surface-121; a light-emitting surface-122;
antireflection film-13; a first refractive index film layer-131; a second refractive index film layer-132;
a first direction-X; the thickness direction-Y of the antireflection film; the length direction-X1 of the flat display panel; second direction-X2
Positive viewing angle-Z; oblique view-Q;
N 0 -the refractive index is constant; n is a radical of min -the refractive index is minimal; n is a radical of max -refractive index maximum;
a spraying device-2; a container-21; -a conduit-22;
a light-shielding film-ZG; first film-layer section-1311.
Detailed Description
Features of various aspects and exemplary embodiments of the present invention will be described in detail below, and in order to make objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It will be apparent to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
It will be understood that when a layer, region or layer is referred to as being "on" or "over" another layer, region or layer in describing the structure of the component, it can be directly on the other layer, region or layer or intervening layers or regions may also be present. Also, if the component is turned over, one layer or region may be "under" or "beneath" another layer or region.
The inventor of the present invention has found that, in a long time of intensive research, when a cover plate without an antireflection functional layer is generally used for a display panel, the appearance of a user is greatly affected by reflected light formed by reflection of ambient light incident on the cover plate. Even if the cover plate with the common antireflection functional layer is used for a flat display panel or a curved display panel, the problem that the visual impression of a user is influenced by reflected light formed by the reflection of ambient light on the display panel cannot be well avoided. Generally, when the flat display panel is used as a cover plate of the flat display panel, the reflectivity is larger when the incident angle of the ambient light is larger, and therefore, when the users receive the reflected light with different intensities at different viewing angles of the flat display panel, the visual appearance of the users at the oblique viewing angles of the flat display panel is inferior to that of the users at the front viewing angles of the flat display panel. The cover plate generally used for the curved-surface display panel is a curved cover plate and has curvature, so that the same beam of light is incident into the curved cover plate and has different incident angles and different reflectivities in different areas of the cover plate, and the reflected light intensities of the different areas of the cover plate are different, thereby influencing the visual impression of a user.
The reason is that, referring to fig. 1, fig. 1 is a light path diagram of a bundle of parallel ambient light incident on a cover plate of a general concave curved surface display panel, and the inventor finds that, in the course of research, when the display panel is a curved surface display panel, taking a concave curved surface display panel as an example, the cover plate 1 is covered on the display surface side of the concave curved surface display panel. The display surface of the concave curved surface display panel is a concave curved surface. The concave curved display panel has a curved cover plate 1 (the display panel is not specifically shown in the drawing, and it is understood that the cover plate 1 is provided on the concave curved display surface side of the concave curved display panel) as shown in fig. 1, and the curved cover plate 1 has a curvature radius R of OA = OE = OD. AC is the tangent to arc ADE at point A, and EF is the tangent to arc ADE at point E. The point O corresponds to the optimal visual perception position of the user, and the OD is vertical to the BG. Suppose a beam of parallel light from the outside environment is incident on the curved cover plate 1. The bundle of parallel light is parallel to the OD, and thus, a light ray incident on the curved cover plate 1 in the OD direction among the bundle of parallel light has a smallest incident angle of 0 ° in the curved cover plate 1, and a light ray incident on the curved cover plate 1 in the OD direction is reflected on the curved cover plate 1 with a smallest reflection angle of 0 °. The light rays of the parallel light beam enter the point A and the point E of the curved cover plate 1 and respectively have a first incident angle theta 1 And a second incident angle theta 2 . First incident angle theta 1 And a second incident angle theta 2 Equal to and greater than zero degrees, and therefore the rays of the parallel beam of light are incident on the curved cover plate 1 at points a and E, with the largest incident angle with respect to the curved cover plate 1. According to the law of reflection, the angle of incidence is equal to the angle of reflection. In general, ambient light incident on the surface of the cover plate (i.e., on the surface of the reflective medium) has a phenomenon that the reflection angle increases and the reflectivity also increases as the incident angle increases.
The light incident on the curved cover plate 1 at points a and E is reflected, and the reflection angles of the light reflected at points a and E are the largest, and the light reflected at points a and E is received by the user. The inventor finds that the reflectivity of each part of the curved cover plate 1 of the same parallel light incident panel is different, the reflected light intensity is different, and the intensity of the light incident to the edge display area is often greater than that of the light incident to the central display area, which affects the appearance of the curved cover plate 1 for the user and the display effect of the edge area of the curved cover plate 1, so that the user uses the whole appearance of the curved display panel, and the user experience is poor.
As shown in fig. 2, fig. 2 is a cover plate optical path diagram of a general convex curved display panel incident to a parallel ambient light beam. When the display panel is a curved display panel and is a convex display panel, the curved cover plate 1 covers the display surface side of the convex display panel. The display surface of the convex curved surface display panel is a convex curved surface. The O point in fig. 2 corresponds to the position of the user's best visual appearance. AE is a straight line parallel to the tangent of the curved cover plate 1, and as an example, a ray of a parallel light beam obliquely incident on the curved cover plate 1 at an acute angle with respect to AE has an incident angle θ of a first ray having a farthest distance from the position of the curved cover plate 1 to which point O is opposed 1 ' of the parallel light beams, the incident angle of the third light beam closest to the position of the curved cover plate 1 corresponding to the point O is θ 3 ' of the parallel light beam, the position of the curved cover plate 1 opposite to the point O is distant from the incident angle of the second light beam in the middle, and the incident angle is theta 2 '. As shown, θ 1 ’<θ 2 ’<θ 3 '. From the fresnel formula, the reflectivity is a function related to the incident angle, and generally, the smaller the incident angle, the smaller the reflection angle and the smaller the reflectivity. Therefore, the reflectivity of the first light ray is lower than that of the second light ray, and the reflectivity of the second light ray is lower than that of the third light ray. Therefore, the human eye receives a larger light intensity of the reflected light of the third light, so that the following can be analyzed: a bundle of parallel light rays incident into the curved cover plate 1 in the convex display panel, particularly a bundle of parallel light rays obliquely incident with an acute included angle with the tangent plane of the curved cover plate 1, has different reflectivity at each position on the curved cover plate 1 of the display panel and different reflected light intensity, and the reflected light intensity of the light rays which are often incident into the central display area in the bundle of parallel light rays is larger than the reflected intensity of the light rays incident into the edge display area, thereby influencing the user to the curved cover plate1 central region and the display effect of the 1 central region of the bent cover plate, so that the user uses the whole impression of the curved surface display panel, and the user experience is poor.
As shown in fig. 3, fig. 3 is a cover light path diagram of a general flat display panel to which a parallel ambient light is incident, and when the display panel is a flat display panel, a flat cover 1 is disposed on the display surface side of the flat display panel. In the front view of the display panel, the light rays exiting the flat cover plate 1 are perpendicular to the display surface. In the oblique viewing angle of the display panel, the included angle between the light ray exiting the straight cover plate 1 and the normal of the display surface is an acute angle. The larger the maximum included angle between the light ray exiting the flat cover plate 1 and the normal of the display surface is, the larger the inclination angle is, and the smaller the maximum included angle between the light ray exiting the flat cover plate 1 and the normal of the display surface is, the smaller the inclination angle is. The user of the flat display panel using the flat cover 1, who views the display panel at a front viewing angle, has a low probability of receiving reflected light formed by the reflection of ambient light having a large incident angle on the flat cover 1. Therefore, the user who watches the display panel at the front viewing angle has better visual appearance and is not influenced by the reflected light on the flat cover plate 1. A user who views the display panel at an oblique viewing angle may receive reflected light formed by reflecting ambient light with a large incident angle on the flat cover plate 1, and based on the reflection law, the larger the incident angle, the larger the reflectivity, and the higher the intensity of the reflected light, so that the user who views the display panel at an oblique viewing angle, especially at a large oblique viewing angle, has a poor visual perception and is greatly influenced by ambient light reflection.
Based on the findings and studies of the above problems, the inventors have come up with the present application.
In a first aspect of the embodiments of the present application, as shown in fig. 4, fig. 4 is a schematic diagram of at least a partial layer structure of a cover plate 1 of a display panel in the first aspect of the embodiments of the present application, and provides a cover plate 1 for a display panel. Fig. 4 illustrates only a partial layer structure of a partial region of the cover plate 1, and the cover plate 1 illustrated in fig. 4 may be a cover plate 1 applied to a flat display panel or a cover plate 1 applied to a curved display panel. The cover plate 1 includes a substrate 12 and an antireflection film 13. The substrate 12 has an incident surface 121 and an exit surface 122 opposite to each other in a thickness direction thereof. The at least one antireflection film 13 is disposed on at least one of the light incident surface 121 and the light emitting surface 122, the antireflection film 13 has a first refractive index film 131 and a second refractive index film 132, the refractive index of the first refractive index film 131 is greater than that of the second refractive index film 132, and the first refractive index film 131 and the second refractive index film 132 are alternately stacked on the light incident surface 121 and/or the light emitting surface 122. In at least one of the antireflection films 13, in the thickness direction Y of the antireflection film, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 is distributed in an increasing manner or a decreasing manner from the central region to the edge region of the cover plate 1 in at least one direction parallel to the light emitting surface 122.
In the first aspect of the embodiment of the application, through setting up antireflection film, and have first refractive index rete and second refractive index rete in the antireflection film, set up the refractive index rete that two refractivities have the difference and pass through the principle of coherent cancellation, to the reflectivity when weakening ambient light incident apron, improve the anti-reflection performance that the apron was set a camera. In the at least one antireflection film, the difference between the refractive indexes of the first refractive index film layer and the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing or decreasing manner from the central area to the edge area of the cover plate in at least one direction parallel to the light emergent surface. The reflection reducing effects of the environmental light with different incident angles on the cover plate are different in at least one direction parallel to the light emergent surface, and the coherence effects of the environmental light with different incident angles on the cover plate in the reflection reducing film are different, so that the reflectivity of the environmental light with different incident angles on the cover plate is consistent. When the cover plate provided by the first aspect of the embodiment of the application is applied to the curved surface display panel, the reflectivity of the same light beam in at least one direction of the curved surface display panel is basically consistent, the cover plate has the performance of low reflectivity and high transmittance, and the visual effect of a user when the curved surface display panel is used is improved. When the apron that this application embodiment first aspect provided is applied to flat display panel, can promote the vision impression that is in the user at display panel slope visual angle, avoid influencing visual effect because of the reflection of ambient light for the user that is in display panel's normal viewing angle and slope visual angle all can obtain good vision impression.
Coherent cancellation generally refers to that when two or more rows of waves are transmitted to the same point in a medium in the interference of light, if the vibration characteristics generated at the point by the two rows of waves are in opposite phases, the vibration of the two rows of waves at the point is weakened or even eliminated by the interaction. After the reflection of the antireflection film on light is weakened, the antireflection performance of the cover plate on light can be realized at the same time.
In some embodiments, the cover plate is used for a curved display panel having a curved track, which can also be understood as a curved display panel with a unidirectional curve, and the light-emitting surface of the substrate has a curved track. In the embodiments, in at least one antireflection film, a difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing or decreasing manner from the central region to the edge region of the cover plate in a direction parallel to the curved trajectory of the light emitting surface.
In some embodiments, the cover plate is used for a curved display panel having two intersecting curved tracks, which can also be understood as a cover plate used for a curved display panel with a bidirectional curvature, and the light-emitting surface of the substrate has two curved tracks. In the embodiments, in at least one of the antireflection films, a difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing or decreasing manner from the central region to the edge region of the cover plate in two directions parallel to the two curved tracks of the light emitting surface, respectively.
In some embodiments, the cover plate is used for a spherical display panel, which can also be understood as a cover plate used for a curved display panel having a plurality of curved tracks intersecting at a point, and the light-emitting surface of the corresponding substrate has a plurality of curved tracks intersecting at a point. In these embodiments, in at least one antireflection film, the difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing or decreasing manner from the central region to the edge region of the cover plate in a plurality of directions parallel to a plurality of curved tracks intersecting at a point on the light exit surface. It can also be simply understood that, in at least one antireflection film, the difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing or decreasing manner from the central region to the edge region of the cover plate in each direction parallel to the light exit surface.
In some embodiments, the cover plate includes one antireflection film or a plurality of antireflection films disposed one on another. In some embodiments, an antireflection film includes at least one first refractive index film layer and at least one second refractive index film layer. The first refractive index film layer and the second refractive index film layer are alternately stacked in the antireflection film.
In some optional embodiments, as shown in fig. 5, fig. 5 is a schematic diagram of at least a partial layer structure of a cover plate of a concave curved display panel in the first aspect of the embodiment of the present disclosure, in which the cover plate 1 is used for a curved display panel, the curved display panel is a concave curved display panel, the substrate 12 in the cover plate 1 is a curved substrate 12, the light emitting surface 122 is a concave curved surface, the light incident surface 121 is a convex curved surface, and the plurality of antireflection films 13 are stacked on the light emitting surface 122, so that the cover plate 1 is also a curved cover plate 1 in these embodiments. In each antireflection film 13, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction of the antireflection film 13 increases from the central region to the edge region of the cover plate 1 in the first direction parallel to the curved trajectory of the light emitting surface 122. In some examples, a pair of first and second refractive index film layers 131 and 132 are stacked in one antireflection film 13, and the first refractive index film layer 131 is disposed closer to the substrate 12 than the second refractive index film layer 132.
In these embodiments, the cover plate 1 for the concave curved surface display panel is provided with the antireflection film 13, so that the cover plate 1 has low reflectivity and high transmittance, the reflectivity of each part of the cover plate 1, where the same beam of parallel light enters the curved display area, is the same, the intensity of reflected light is basically the same, the reflectivity of the light entering the edge display area is basically the same as that of the light entering the central display area, the problem that the intensity of reflected light is higher in the edge area of the curved cover plate 1 due to the larger reflectivity of the incident light is avoided, the overall visual impression of the concave curved surface display panel is improved, and the good visual experience of a user is ensured.
In some embodiments, as shown in fig. 6, fig. 6 is a schematic diagram of at least a partial layer structure of a cover plate of a concave curved display panel according to the first aspect of the embodiment of the present application. In each antireflection film 13 used for the cover plate of the concave curved surface display panel, in the first direction X, the refractive index of the first refractive index film layer 131 is gradually distributed from the central region to the edge region of the cover plate, and the refractive index of the second refractive index film layer 132 is the same everywhere in the curved surface parallel to the light emitting surface 122.
It is to be understood that fig. 6 shows the refractive index change of the antireflection films 13 disposed on the curved cover plate, and for convenience of illustration, the structure in which the antireflection films 13 are stacked and the substrate 12 are spread on an imaginary horizontal plane are shown. In these embodiments, the refractive index of the first refractive index film layer 131 is changed while the refractive index of the second refractive index film layer 132 is unchanged, and the refractive index of the first refractive index film layer 131 is greater than the refractive index of the second refractive index film layer 132, so that in each antireflection film 13, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film is gradually distributed from the central region to the edge region of the cover plate in the first direction X. Therefore, in the first direction X, the interference effect on the ambient light incident on the cover plate from the central region to the edge region of the cover plate in each antireflection film 13 is increasingly excellent. Therefore, in the environment, the reflectivity of a bundle of parallel rays incident to the bent cover plate is the same at all positions of the bent cover plate, particularly all positions of the bent cover plate in the first direction X, and the visual impression of a curved-surface display panel user is improved. It is understood that the increasing manner of the refractive index of the first refractive index film layer 131 in the first direction X may be a linear increasing manner, a gradient increasing manner, an exponential increasing manner, or an increasing manner with any rule, and those skilled in the art may select the increasing manner according to the requirement.
In some embodiments, as shown in fig. 7, fig. 7 is a schematic view of at least a partial layer structure of a cover plate of another concave curved display panel in the first aspect of the present embodiment, in each antireflection film 13 used in the cover plate of the concave curved display panel, in the first direction X, the refractive index of the second refractive index film layer 132 is gradually distributed from the central region to the edge region of the cover plate, and the refractive index of the first refractive index film layer 131 is the same everywhere in a curved surface parallel to the light exit surface 122.
It is to be understood that fig. 7 shows the refractive index change of the antireflection films 13 disposed on the curved cover plate, and for convenience of illustration, the structure in which the antireflection films 13 are stacked and the substrate 12 are spread on an imaginary horizontal plane are shown. In these embodiments, the refractive index of the first refractive index film layer 131 is unchanged due to the change of the refractive index of the second refractive index film layer 132, and the refractive index of the first refractive index film layer 131 is greater than the refractive index of the second refractive index film layer 132, so that in each antireflection film 13, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film is gradually distributed from the central region to the edge region of the cover plate in the first direction X. Therefore, in the first direction X, the interference effect on the ambient light incident on the cover plate from the central region to the edge region of the cover plate in each antireflection film 13 is increasingly excellent. Therefore, in the environment, the reflectivity of a beam of parallel light incident to the curved cover plate is the same at each position of the curved cover plate, especially at each position of the curved cover plate in the first direction X, and the visual impression of a curved display panel user is improved. In each of the antireflection films 13, the refractive index of the first refractive index film layer 131 in the thickness direction Y of the antireflection film is always larger than the refractive index of the second refractive index film layer 132.
In some embodiments, in each of the antireflection films 13 used for the cover plate of the concave curved surface display panel, the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film are distributed variably in the first direction X. However, in each of the antireflection films 13, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film is required to be gradually increased from the central region to the edge region of the cover plate in the first direction X.
In some alternative embodiments, in each antireflection film 13, the refractive index of the first refractive index film layer 131 is the same everywhere in a curved surface parallel to the light emitting surface 122, and the second refractive index film layer 132 has SiO x N y Material by conditioning SiO x N y The nitrogen-oxygen ratio in the material is such that the refractive index of the second refractive index film layer 132 is distributed in a decreasing manner from the central region to the edge region of the cover plate in the first direction X; alternatively, in each of the antireflection films 13, the refractive index of the second refractive index film layer 132 is the same at each position in the curved surface parallel to the light emitting surface 122, the first refractive index film layer 131 is made of SiOxNy material, and the nitrogen-oxygen ratio in the SiOxNy material is adjusted such that the refractive index of the first refractive index film layer 131 is gradually distributed from the central region to the edge region of the cover plate in the first direction X.
In some embodiments, in each of the antireflection films 13, the refractive index of the second refractive index film layer 132 is the same everywhere in a curved surface parallel to the light emitting surface 122, and the first refractive index film layer 131 is made of SiOxNy material, and the ratio of nitrogen to oxygen in the SiOxNy material is adjusted such that the refractive index of the first refractive index film layer 131 is gradually distributed from the central region to the edge region of the cover plate in the first direction X. In some examples, please refer to fig. 8, where fig. 8 is a schematic diagram of at least a partial layer structure of a cover plate of a concave display panel in the first aspect of the embodiment of the present application, and for convenience of illustration, the cover plate is shown after being spread on an imaginary horizontal plane. As shown in FIG. 8, the first refractive index film 131 has SiOxNy material, and the second refractive index film 132 has SiO 2 The refractive index of the second refractive index film layer 132 in each antireflection film is always lower than the refractive index of the first refractive index film layer 131. In each antireflection film 13, siO is provided in the center region of the cover plate 7 N 3 MaterialThe nitrogen-oxygen ratio of the SiOxNy material from the central area of the cover plate to the edge area of the cover plate is consistently increased, the larger the nitrogen-oxygen ratio is, the larger the refractive index of the material is, and the SiO is arranged in the edge area of the cover plate 1 N 9 A material. The refractive index of the first refractive index film layer 131 in each of the anti-reflection films 13 is the same in the cover thickness direction, and the manner and rate of increasing the refractive index of the first refractive index film layer 131 in each of the anti-reflection films 13 are the same in the first direction X.
In some embodiments, in each antireflection film 13, the refractive index of the first refractive index film layer 131 is the same everywhere in a curved surface parallel to the light emitting surface 122, and the second refractive index film layer 132 has SiO x N y Material by conditioning SiO x N y The nitrogen-to-oxygen ratio in the material is such that the refractive index of the second refractive index film layer 132 is gradually decreased from the central region to the edge region of the cover plate in the first direction X. In some examples, please refer to fig. 9, fig. 9 is a schematic diagram of at least a partial layer structure of a cover plate of another concave curved display panel in the first aspect of the embodiment of the present application, and for convenience of illustration, the cover plate is shown after being spread on an imaginary horizontal plane. As shown in fig. 9, in each antireflection film, the first refractive index film layer 131 has Nb 2 O 5 The material of the second refractive index film layer is SiOxNy, and the refractive index of the second refractive index film layer 132 is always lower than that of the first refractive index film layer 131. In each antireflection film 13, siO is provided in the center region of the cover plate 2 N 8 The nitrogen-oxygen ratio of the SiOxNy material from the central region of the cover plate to the edge region of the cover plate is uniformly reduced, the smaller the nitrogen-oxygen ratio is, the smaller the refractive index of the material is, and the SiO is arranged in the edge region of the cover plate 8 N 2 A material.
To further demonstrate the beneficial effect of the above embodiments on enhancing the visual appearance of a curved display panel, particularly a concave curved display panel, by a user, the inventors made a first set of comparative experiments, which includes comparative example 1 and experimental example 1.
Comparative example 1 includes a curved cover plate, and the curved cover plate is used for a concave curved display panel. The curved cover plate comprises a substrate 12 and an arrangementTwo antireflection films 13 on the light emergent surface 122 of the substrate 12, wherein the first refractive index film layer 131 of each antireflection film 13 is Nb 2 O 5 The refractive index of the (niobium pentoxide) material is the same at each position in the curved surface parallel to the light-emitting surface 122 of the substrate 12, and the second refractive index film 132 is made of SiO 2 (silicon dioxide) material, and the refractive index is the same at each position in the curved surface parallel to the light-emitting surface 122 of the substrate 12.
Experimental example 1 included a curved cover plate, and the curved cover plate was used for a concave curved display panel. The curved cover plate comprises a substrate 12 and two antireflection films 13 arranged on a light emergent surface 122 of the substrate 12, wherein a first refractive index film layer 131 in each antireflection film 13 adopts Nb 2 O 5 The refractive index of the (niobium pentoxide) material is the same at each position in the curved surface parallel to the light-emitting surface 122 of the substrate 12. The second refractive index film 132 is made of SiOxNy material. The second refractive index film layer 132 is formed by adjusting the nitrogen-to-oxygen ratio of the SiOxNy material such that the refractive index of the second refractive index film layer 132 decreases from the central region to the edge region of the cover plate in the first direction X. In some examples, the higher the oxygen content and the lower the nitrogen content in the SiOxNy material, the lower the refractive index of the SiOxNy material. As shown in fig. 9, fig. 9 is a schematic view of at least a partial layer structure of a cover plate of another concave curved surface display panel in the first aspect of the embodiment of the present application, and is a schematic view of a partial layer structure of the antireflection film 13 and the substrate 12 of the cover plate in experimental example 1. It is to be understood that fig. 9 shows the refractive index change of the antireflection films 13 disposed on the curved cover plate, and for the sake of convenience of illustration, the structure in which two antireflection films 13 are stacked and the substrate 12 are spread on an imaginary horizontal plane are shown.
The length of the bent cap plate was 300mm, the bending radius was 700mm, and the central angle of the bent cap plate was 24.56 ° in both experimental example 1 and comparative example 1. Referring to fig. 1 and 8 together, a bundle of parallel light of the bundle and the OD is incident on the cover plate of experimental example 1 and the cover plate of comparative example 1, respectively, and the incident angle of the light ray incident on the curved cover plate along the OD direction in the curved cover plate is the smallest and is 0 °; the incident angle of the beam of parallel light incident on the curved cover plate at points a and E is 12.28 ° at the maximum.
As shown in fig. 10, fig. 10 is a graph showing the relationship between the wavelength of light and the reflectance when the incident angle is 0 ° in comparative example 1 and experimental example 1 in the first set of experiments in the first aspect of the example of the present application. In fig. 10, the lateral axis is the wavelength of incident light and the vertical axis is the reflectance. Fig. 10 reflects the reflectance of light having different wavelengths incident at an angle of 0 ° (the light is incident on the curved cover plate in the OD direction), the cover plate corresponding to experimental example 1, and the cover plate corresponding to comparative example 1. As can be seen from fig. 10, when the wavelength range of the incident light is in the range of 440 to 630nm, the reflectance of the cover plate corresponding to the experimental example 1 upon which the incident light of the same wavelength is incident is lower than the reflectance of the cover plate corresponding to the comparative example 1 upon which the incident light of the same wavelength is incident. Fig. 10 demonstrates that the cover plate according to experimental example 1 has more excellent antireflection effect and lower reflectance to ambient light than the cover plate according to comparative example 1.
As shown in fig. 11, fig. 11 is a graph showing the relationship between the wavelength of light and the reflectance and transmittance when the incident angle is 0 ° in experimental example 1 of the first set of experiments in the first aspect of the embodiments of the present application. In fig. 11, the lateral axis is the wavelength of incident light and the vertical axis is the reflectance. The wavelength range of visible light is 380-780 nm, the sensitivity of human eyes to light with different wavelengths is considered in experimental example 1, and the wavelength range tested in example 1 is 360-740 nm. Fig. 11 shows the reflectance and transmittance of light having different wavelengths and incident angle of 0 ° (the light is incident on the curved cover plate in the OD direction) incident on the cover plate according to experimental example 1. As can be seen from fig. 11, the cover plate has a low reflectance of less than 1% for incident light having a wavelength in the range of 400 to 760nm, particularly 440 to 620nm, which corresponds to the ultra-low reflectance range, and the cover plate has a high transmittance of more than 98% for incident light having a wavelength in the range of 400 to 760nm, particularly 440 to 620 nm. It can be seen that the cover plate according to experimental example 1 has low reflectivity and high transmittance.
TABLE 1
Figure BDA0002879792370000151
Table 1 shows the reflectance of the cover plate corresponding to each of comparative example 1 and experimental example 1 in the same beam of parallel light incident on the cover plate at different incident angles and the corresponding color coordinates of the reflected light in CIE1976 (L × a × b) uniform color space. In CIE1976 (L a b) uniform color space, L represents luminance, not shown in the table. The a value represents the red-green chroma, the b value represents the yellow-green chroma, when a is greater than 0, the color is represented by a red system, and the larger the a value is, the more red the color is. When a is 0, the color belongs to green series. The larger the value of a, the more red the color. b 0 is yellow, b 0 is blue, and the larger the value of b, the more yellow the color. In general, in a display panel, it is expected that the range of the reflected color phase fluctuation of the ambient light on the cover is small, that is, the color phase coordinates (a, b) of the reflected light of the ambient light with different incident angles need to be inclined to converge in one quadrant, and preferably in the third quadrant, (a, b) is optimally in the range of (-6 to 0 ); furthermore, the more (0,0) the color phase coordinates (a, b) of the reflected light of the ambient light with different incident angles are, the better the display effect of the display panel and the visual experience of the user can be improved.
As can be clearly seen from table 1, when the same parallel light beam is incident on the cover plate corresponding to experimental example 1 and the cover plate corresponding to comparative example 1 at different incident angles, respectively, the absolute value of the difference between the reflectivities of the light beams incident on the cover plate corresponding to experimental example 1 at different incident angles is less than 0.02, and the reflectivity is substantially between 0.120% and 0.139%. In addition, in the experimental example 1, the hue coordinates (a, b) of the reflected lights corresponding to the ambient lights with different incident angles are concentrated, and the hue fluctuation range of the reflected lights is small, which is more favorable for improving the display effect of the display panel and improving the visual impression of the user. In comparative example 1, the color coordinates (a, b) of the reflected lights corresponding to the ambient lights with different incident angles are scattered, the fluctuation range of the color is large, the color of the reflected light is relatively poor, and the color coordinates corresponding to the different reflected lights affect the visual appearance of the user and also affect the display effect of the display panel.
To further demonstrate the beneficial effect of the above embodiments on enhancing the visual appearance of a user of a flat display panel, the inventors conducted a second set of comparative experiments, which included comparative example 2 and experimental example 2.
Comparative example 2 includes a flat cover plate, and the flat cover plate is used for a flat display panel. The flat cover plate comprises a substrate and two layers of antireflection films arranged on the light emergent surface of the substrate, wherein a first refractive index film layer in each antireflection film adopts Nb 2 O 5 The second refractive index film layer is made of SiO 2 The material is made of the same refractive index at each position in a plane parallel to the light emergent surface of the substrate.
Experimental example 2 includes a flat cover plate, and the flat cover plate is used for a flat display panel. The flat cover plate comprises a substrate and two layers of antireflection films arranged on the light emergent surface of the substrate, wherein a first refractive index film layer in each antireflection film adopts Nb 2 O 5 The material (niobium pentoxide) is made of a material, and the refractive indexes of all parts in a plane parallel to the light-emitting surface of the substrate are the same. The second refractive index film layer is made of SiOxNy materials. The second refractive index film layer is formed by adjusting the nitrogen-oxygen ratio in the SiOxNy material, so that the refractive index of the second refractive index film layer is distributed in a descending manner from the central area to the edge area of the cover plate in the length direction of the flat display panel. In some examples, the higher the oxygen content and the lower the nitrogen content in the SiOxNy material, the lowest the refractive index of the SiOxNy material. As shown in fig. 12, fig. 12 is a schematic view of at least a partial layer structure of a cover plate of another concave curved surface display panel in the first aspect of the embodiment of the present application, and is a schematic view of a partial layer structure of the antireflection film 13 and the substrate 12 of the cover plate 1 in experimental example 2. The nitrogen-oxygen ratio of the SiOxNy material in the second refractive index film layer is gradually decreased from the central region to the edge region of the cover plate 1 in the length direction X1 of the flat display panel, so that the refractive index of the second refractive index film layer is from the central region of the cover plate in the length direction X1 of the flat display panelThe domains are distributed in decreasing order to the edge region.
Light rays with different incident angles are respectively incident on the cover plate corresponding to the comparative example 2 and the cover plate corresponding to the experimental example 2, and the reflectivity and the hue coordinate (a, b) of the light rays with different incident angles on the cover plate corresponding to the comparative example 2 and the cover plate corresponding to the experimental example 2 are detected. As shown in fig. 13, fig. 13 is a schematic diagram of the relationship between the incident angle of incident light and the reflection angle of reflected light and the viewing angle in the second set of experiments in the example of the present application, and the incident angles of the light rays incident on the cover plate corresponding to comparative example 2 and the cover plate corresponding to experimental example 2 are 0 °, 10 °, 20 °, 30 °, 40 °, 50 °, and 60 °, respectively. The reflected lights having the reflection angles of 0 °, 10 °, 20 °, 30 °, 40 °, 50 °, and 60 ° are received by the reflected light receiving device at the corresponding viewing angle. The results of the experiment are shown in table 2.
TABLE 2
Figure BDA0002879792370000171
With reference to table 2 and fig. 14 and 15, fig. 14 is a graph of a relationship between a viewing angle and a reflectance of the reflected light of experimental example 2 and comparative example 2 in the second set of experiments in the present application example, and fig. 15 is a schematic diagram of a position of a hue coordinate corresponding to the reflected light of experimental example 2 and comparative example 2 in the second set of experiments in the present application example. As shown in fig. 14, the reflectivity of the light incident at a large angle on the cover plate of experimental example 2 is lower than that on the cover plate of comparative example 2, for example, the reflectivity of the light incident at an incident angle greater than or equal to 30 ° on the cover plate of experimental example 2 is lower, the brightness of the reflected light of the light incident at a large angle is reduced, the visual impression of the user at the corresponding large viewing angle (or the oblique viewing angle corresponding to the display panel) is further improved, and the display effect and the user experience of the display panel are improved. And in the experimental example 2, the reflectivity of the light rays with different incident angles is basically less than or equal to 1.029%, so that the requirement of ultralow reflectivity of the cover plate is met. Further, as shown in fig. 15, in experimental example 2, the hue coordinates of the reflected light of the light rays with different incident angles are all converged to the third pixel, so that the hue of the reflected light on the cover plate is optimized, and the display effect is further improved. In contrast, in comparative example 2, the reflectivity of the light with a large incident angle on the cover plate of comparative example 2 is higher, especially the reflectivity of the incident light with the incident angle greater than or equal to 30 ° is increasingly higher, the maximum reflectivity reaches 4.254%, and the requirement of ultralow reflection of the cover plate is not met. In the comparative example 2, the dispersion degree of the hue coordinates of the reflected light corresponding to the light with different incident angles is large, the reflected light is dispersed in the first quadrant and the third quadrant, and the hue fluctuation range of the different reflected light is large, so that the reflected light on the cover plate is relatively poor in hue, and the visual impression of a user and the display effect of the display panel are influenced.
Therefore, it can be verified that the cover plate in the embodiment of the present application can reduce the reflectivity of the ambient light with a large incident angle when used in the flat display panel, and prevent the user at the oblique viewing angle of the display panel from receiving the reflected light with a large reflectivity, so that the user at the normal viewing angle and the oblique viewing angle of the display panel can obtain a good visual impression when using the flat display panel.
In some optional embodiments, as shown in fig. 16, fig. 16 is a schematic diagram of at least a partial layer structure of a cover plate of a convex-curved display panel in the first aspect of the embodiment of the present disclosure, the cover plate 1 is used for a curved display panel, the curved display panel is a convex-curved display panel, the substrate 12 of the cover plate 1 is a curved substrate 12, the light emitting surface 122 is a convex curved surface, the light incident surface 121 is a concave curved surface, and the plurality of antireflection films 13 are stacked on the light emitting surface 122, so that the cover plate 1 is also a curved cover plate 1 in these embodiments. In each antireflection film 13, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film is gradually decreased from the central region to the edge region of the cover plate 1 in the second direction X2 parallel to the curved track of the light-emitting surface 122. In some examples, a pair of first and second refractive index film layers 131 and 132 are stacked in one antireflection film 13, and the first refractive index film layer 131 is disposed closer to the substrate 12 than the second refractive index film layer 132.
In these embodiments, the cover plate 1 for the convex curved surface display panel is provided with the antireflection film 13, which not only enables the cover plate 1 to have low reflectivity and high transparency, but also enables the same parallel light to be incident on the curved cover plate 1 with the same reflectivity, and the reflected light intensity is basically consistent, so that the light incident on the edge display area and the light incident on the center display area are basically the same in reflectivity, thereby avoiding the phenomenon that the reflected light intensity is higher in the center area of the curved cover plate 1 than in the edge area of the curved cover plate 1 due to the larger reflectivity of the incident light, improving the overall visual impression of the concave curved surface display panel, and ensuring the good visual experience of the user.
In some embodiments, as shown in fig. 16, fig. 16 is a schematic diagram of at least a partial layer structure of a cover plate of a convex-curved display panel according to still another first aspect of the present embodiment, in each antireflection film 13 of the cover plate 1 for the convex-curved display panel, in the second direction X2, the refractive index of the first refractive index film layer 131 is gradually decreased from the central region to the edge region of the cover plate 1, and the refractive index of the second refractive index film layer 132 is the same everywhere in a curved surface parallel to the light emitting surface 122.
It is to be understood that fig. 17 shows the refractive index change of the antireflection films 13 disposed on the curved cover plate 1, and for convenience of illustration, the structure in which the antireflection films 13 are stacked and the substrate 12 are spread on an imaginary horizontal plane are shown. In these embodiments, the refractive index of the first refractive index film layer 131 is changed while the refractive index of the second refractive index film layer 132 is not changed, so that in each antireflection film 13, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film is gradually decreased from the central region to the edge region of the cover plate 1 in the second direction X2. Therefore, in the second direction X2, the interference effect on the ambient light incident on the cover plate 1 from the edge area to the center area of the cover plate 1 in each antireflection film 13 is increasingly excellent. Therefore, in the environment, a bundle of parallel light rays incident on the curved cover plate 1 has the same reflectivity at all positions of the curved cover plate 1, especially at all positions of the curved cover plate 1 in the second direction X2, and the visual impression of a curved display panel user is improved. It is understood that the refractive index of the first refractive index film layer 131 may be linearly decreased, gradiently decreased, logarithmically decreased or randomly decreased in the first direction, and those skilled in the art may select the decreasing manner according to the requirement.
In some embodiments, as shown in fig. 18, fig. 18 is a schematic diagram illustrating at least a partial layer structure of a cover plate of another convex curved display panel in the first aspect of the present embodiment, in each antireflection film 13 of the cover plate 1 for a convex curved display panel, in the second direction X2, the refractive index of the second refractive index film layer 132 is gradually distributed from the central region to the edge region of the cover plate 1, and the refractive index of the first refractive index film layer 131 is the same everywhere in a curved surface parallel to the light emitting surface 122.
It is to be understood that fig. 18 shows the refractive index change of the antireflection films 13 disposed on the curved cover plate 1, and for the sake of convenience of illustration, the structure in which the antireflection films 13 are stacked and the substrate 12 are spread on an imaginary horizontal plane are shown. In these embodiments, the refractive index of the first refractive index film layer 131 is unchanged due to the change in the refractive index of the second refractive index film layer 132, so that in each antireflection film 13, the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film is gradually decreased from the central region to the edge region of the cover plate 1 in the second direction X2. Therefore, in the second direction X2, the interference effect on the ambient light incident on the cover plate 1 from the edge area to the center area of the cover plate 1 in each antireflection film 13 is increasingly excellent. Therefore, in the environment, a bundle of parallel light rays incident on the curved cover plate 1 has the same reflectivity at all positions of the curved cover plate 1, especially at all positions of the curved cover plate 1 in the second direction X2, and the visual impression of a curved display panel user is improved. In each of the antireflection films 13, the refractive index of the first refractive index film layer 131 in the thickness direction Y of the antireflection film is always larger than the refractive index of the second refractive index film layer 132.
In some embodiments, in each of the antireflection films 13 of the cover sheet 1 for a convex curved display panel, the refractive index of the first refractive index film layer 131, and the refractive index of the second refractive index film layer 132 in the thickness direction Y of the antireflection film are distributed variably in the second direction X2. However, it is necessary to ensure that the difference between the refractive index of the first refractive index film layer 131 and the refractive index of the second refractive index film layer 132 in the thickness direction Y of each antireflection film 13 decreases from the central region to the edge region of the cover plate 1 in the second direction X2.
In some optional embodiments, in the light exiting direction of the cover plate 1, in two adjacent antireflection films 13, the equivalent refractive index of the antireflection film 13 near the light exiting surface 122 is higher than the equivalent refractive index of the antireflection film 13 far from the light exiting surface 122.
In some examples, each antireflection film 13 in the cover plate 1 has a first refractive index film layer 131 and a second refractive index film layer 132 which are correspondingly stacked, and the first refractive index film layer 131 is disposed closer to the substrate 12 than the second refractive index film layer 132 in each antireflection film 13. Each antireflection film 13 may be equivalent to an optical film layer having a virtual refractive index. Illustratively, the first light beam is incident on the first region of the first antireflection film 13, and is reflected by the antireflection action of the first refractive index film layer 131 and the second refractive index film layer 132, and the reflectivity of the first region of the first antireflection film 13 to the first light beam is the first reflectivity. Assuming that the same first light beam is incident on a second region of the optical film layer equivalent to the first antireflection film 13 (the first region and the second region are corresponding to each other in the thickness direction of the antireflection film 13), and reflected after the antireflection action of the optical film layer, the reflectivity of the second region of the optical film layer corresponding to the first light beam is also the first reflectivity, and the virtual refractive index of the second region of the light film layer at this time is the equivalent refractive index corresponding to the first region of the first antireflection film 13.
In these optional embodiments, in the light exit direction of the cover plate 1, in two adjacent antireflection films 13, the equivalent refractive index of the antireflection film 13 close to the light exit surface 122 is higher than the equivalent refractive index of the antireflection film 13 far from the light exit surface 122, so that in the light exit direction of the cover plate 1, the equivalent refractive index of the antireflection film gradually decreases from the light exit surface of the substrate to the external environment, and the reflectivity of the entire cover plate to the ambient light is further reduced, so that the performance of the entire cover plate with low reflectivity and high transmittance is further improved, and the visual impression of the user is further improved.
In some alternative embodiments, in the light exiting direction of the cover plate 1, the refractive index of each antireflection film 13 corresponding to the second refractive index film layer 132 decreases progressively, and the refractive index of the first refractive index film layer 131 of the antireflection film 13 far away from the light exiting surface 122 in two adjacent antireflection films 13 is higher than the refractive index of the second refractive index film layer 132 of the antireflection film 13 near the light exiting surface 122.
As a specific example, as shown in fig. 19, fig. 19 is a schematic diagram of at least a partial layer structure of a cover plate of a concave curved display panel according to the first aspect of the embodiment of the present application, and at least two antireflection films 13 are stacked on a light emitting surface 122 of a substrate 12 of a cover plate 1 applied to a concave curved display panel. Each antireflection film 13 has a first refractive index film layer 131 and a second refractive index film layer 132 stacked correspondingly, and the first refractive index film layer 131 is closer to the light emitting surface 122 of the substrate 12 than the second refractive index film layer 132. The first and second refractive index film layers 131 and 132 are always alternately stacked in the thickness direction of the cover sheet 1. In each antireflection film 13, the first refractive index film layer 131 has Nb 2 O 5 The first refractive index film 131 and the light emitting surface 122 of the substrate 12 have the same in-plane refractive index. The second refractive index film layer 132 is made of SiOxNy material, and the refractive index of the second refractive index film layer 132 in each antireflection film 13 is decreased from the central region to the edge region of the cover plate 1 in the first direction X by adjusting the nitrogen-oxygen ratio. In the two adjacent antireflection films 13, the refractive index of the second refractive index film layer 132 (from the central region to the edge region of the cover plate, the nitrogen-to-oxygen ratio of the SiOxNy material is gradually decreased from 9/1 to 3/7) near the light emitting surface 122 of the substrate 12 in the thickness direction of the cover plate 1 is higher than the refractive index of the second refractive index film layer 132 (from the central region to the edge region of the cover plate, the nitrogen-to-oxygen ratio of the SiOxNy material is gradually decreased from 8/2 to 2/8) far away from the substrate 12, so that the refractive index of each antireflection film 13 corresponding to the second refractive index film layer 132 decreases along the light emitting direction of the cover plate 1. And the middle and far light-emitting surfaces 122 of two adjacent antireflection films 13First refractive index film layer 131 (having Nb) of antireflection film 13 of 2 O 5 Material) is higher than the second index film layer 132 (the ratio of nitrogen to oxygen of the SiOxNy material gradually decreases from 9/1 to 3/7 from the central region to the edge region of the cover plate) of the antireflection film 13 near the light emitting surface 122. SiOxNy materials compared to Nb 2 O 5 The material is a low refractive index material. Fig. 19 shows the refractive index changes of two antireflection films 13 disposed on the curved cover plate 1, and for the sake of convenience of illustration, the structure in which two antireflection films 13 are stacked and the substrate 12 are spread on an imaginary horizontal plane are shown.
As a specific example, as shown in fig. 20, fig. 20 is a schematic view of at least a partial layer structure of a cover plate of a concave curved surface display panel in the first aspect of the embodiment of the present application, and at least two antireflection films 13 are stacked on a light emitting surface 122 of a substrate 12 of a cover plate 1 applied to a concave curved surface display panel. Each antireflection film 13 has a first refractive index film layer 131 and a second refractive index film layer 132 stacked correspondingly, and the first refractive index film layer 131 is closer to the light emitting surface 122 of the substrate 12 than the second refractive index film layer 132. The first refractive index film layer 131 and the second refractive index film layer 132 are always alternately stacked in the thickness direction of the cover sheet 1. In each of the antireflection films 13, the first refractive index film layer 131 has SiOxNy material, the refractive index of the first refractive index film layer 131 in each of the antireflection films 13 is gradually distributed from the central region to the edge region of the cover plate 1 in the first direction X by adjusting the nitrogen-oxygen ratio, and in two adjacent antireflection films 13, the refractive index of the first refractive index film layer 131 close to the substrate 12 in the thickness direction of the cover plate 1 (from the central region to the edge region of the cover plate, the nitrogen-oxygen ratio of the SiOxNy material gradually increases from 3/7 to 9/1) is higher than the refractive index of the first refractive index film layer 131 far from the substrate 12 (from the central region to the edge region of the cover plate, the nitrogen-oxygen ratio of the SiOxNy material gradually increases from 2/8 to 8/2). The in-plane refractive indexes of the second refractive index film 132 and the light-emitting surface 122 of the substrate 12 are the same, and the second refractive index film 132 has SiO 2 A material. And the first refractive index film layer 131 (having S) of the antireflection film 13 far from the light-emitting surface 122 of the two adjacent antireflection films 13The refractive index of the SiOxNy material decreases from 9/1 to 3/7 from the central region to the edge region of the cover plate) is higher than that of the second refractive index film layer 132 (having SiO) of the anti-reflection film 13 near the light-emitting surface 122 2 Material) refractive index. SiO 2 2 The material is a low refractive index material relative to the SiOxNy material. Fig. 20 shows the refractive index changes of two antireflection films 13 disposed on the curved cover plate 1, and for the sake of convenience of illustration, the structure in which two antireflection films 13 are stacked and the substrate 12 are spread on an imaginary horizontal plane are shown.
In some optional embodiments, the refractive index of the first refractive index film layer ranges from 1.5 to 4, and the refractive index of the second refractive index film layer ranges from 1 to 1.5.
In some optional embodiments, the cover plate further comprises a third refractive index film layer arranged on the side of the antireflection film opposite to the substrate, and the refractive index of the third refractive index film layer is lower than that of the first refractive index film layer and that of the second refractive index film layer. In some embodiments, the refractive index of the third refractive index film layer is less than or equal to 1.4. In some examples, the third refractive index film layer has MgF 2 A material.
In some alternative embodiments, the material of the first index film layer is selected from TiO 2 、Nb 2 O 5 And SiNx.
In some optional embodiments, the number of the antireflection films in the cover plate ranges from 2 to 50. In some embodiments, the number of antireflection films in the cover plate ranges from 4 to 20. In other embodiments, the number of antireflection films in the cover plate ranges from 4 to 15.
In some optional embodiments, the thickness of the antireflection film ranges from 1 nm to 1000nm. In some embodiments, the thickness of the anti-reflective film ranges from 1 nm to 500nm. In other embodiments, the thickness of the anti-reflective film ranges from 1 nm to 200nm.
In some embodiments, the material of the substrate may be selected from any of glass, light-transmissive polymers.
The second aspect of the embodiments of the present application further provides a display panel, which includes a display substrate having a light emitting surface and the cover plate in the first aspect of the embodiments of the present application. The cover plate is arranged on the light emergent surface side of the display substrate in a covering mode, and the substrate is closer to the display substrate than the antireflection film. In some embodiments, any device having a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, a display, an electronic watch, or a television, may include the display panel of the second aspect of the embodiments of the present application. The display device may be a display device including the display panel performing curved and/or flat display in the second aspect of the embodiment of the present application. The display panel that this application embodiment second aspect provided can promote user's vision impression, improves display quality and display effect.
A third aspect of the embodiments of the present application provides a method for manufacturing a cover plate, including:
s10, providing a substrate, wherein the substrate is provided with a light incident surface and a light emitting surface which are opposite to each other in the thickness direction of the substrate;
s20, forming an antireflection film, alternately preparing N first refractive index film layers and N second refractive index film layers on the light incident surface and/or the light emergent surface to correspondingly form N laminated antireflection films, wherein N is greater than or equal to 1, N is an integer, the refractive index of the first refractive index film layers is greater than that of the second refractive index film layers,
in at least one antireflection film, in the thickness direction of the antireflection film, the difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer is distributed in an increasing or decreasing manner from the central area to the edge area of the cover plate in at least one direction parallel to the light emitting surface.
In some alternative embodiments, in the step of S20 of forming the antireflection film, the steps of:
s21, preparing each first refractive index film layer and each second refractive index film layer by adopting any one of a photoetching method, a chemical vapor deposition method, a physical vapor deposition method, a silk-screen printing method and a spraying method,
the refractive index of each first refractive index film layer is the same in all positions in a plane parallel to the substrate, and the refractive index of each second refractive index film layer is distributed in a descending or ascending manner from the central area to the edge area of the cover plate in the plane parallel to the substrate; alternatively, the refractive index of each second refractive index film layer is made the same in each place in a plane parallel to the substrate, and the refractive index of the first refractive index film layer is distributed in a decreasing or increasing manner from the central region to the edge region of the cover plate in the plane parallel to the substrate.
As a specific example, a first refractive index film layer and a second refractive index film layer are prepared on a substrate using a spray coating method to form a cover plate. It is understood that when the cover plate is applied to a curved display panel, a curved cover plate needs to be fabricated to be suitable for the curved display panel. In some examples, a curved substrate is first provided, and an antireflection film is formed on the curved substrate to obtain a curved cover plate. In other examples, a flat substrate is provided, an antireflection film is formed on the flat substrate to obtain a prefabricated cover plate, and then the prefabricated cover plate is bent according to the bending degree of the curved display panel to obtain a target bent cover plate.
Taking a flat substrate as an example, a cover plate with an antireflection film is obtained, and the refractive index of the first refractive index film layer of the antireflection film is distributed in an increasing or decreasing manner from the central region to the edge region of the cover plate, and the refractive index of the second refractive index film layer is the same everywhere in a plane parallel to the substrate.
By using a spraying method, a spraying device 2 capable of moving a relatively flat substrate is provided, as shown in fig. 21, fig. 21 is a schematic structural diagram of an apparatus for manufacturing a cover plate by using a spraying method in the third aspect of the embodiment of the present application, and the spraying device 2 can move in any direction in a plane parallel to the substrate. In order to form a first refractive index film layer having a graded refractive index, solutions having different refractive indexes for forming the first refractive index film layer may be contained in different containers 21, the containers 21 being connected to the coating apparatus 2 through pipes 22, and the solutions having corresponding refractive indexes may be coated on a predetermined region of the substrate to form a plurality of film layer portions having different refractive indexes and being in close contact with each other during the movement of the coating apparatus 2 in one direction with respect to the substrate, so as to form the first refractive index film layer having a refractive index increasing or decreasing from a central region of the substrate to an edge region of the substrate in one direction in a plane parallel to the substrate. And forming a second refractive index film layer on one side of the first refractive index film layer, which is deviated from the substrate, by using a spraying method, wherein the spraying equipment 2 moves relative to the substrate in the forming process of the second refractive index film layer, and the spraying equipment 2 sprays the solution with the consistent refractive index.
In the third aspect of the embodiment of the present application, as shown in fig. 22, fig. 22 is a schematic structural diagram of an apparatus for manufacturing a cover plate by photolithography, and in the specific implementation, a plurality of film layer portions in close contact with each other are sequentially formed on a substrate by photolithography to form a first refractive index film layer with a gradually changing refractive index. For example, a pre-refractive index film layer having the same refractive index as the first film layer 1311 is deposited on the substrate, a light shielding film ZG corresponding to the first film layer 1311 is disposed above the substrate, and the pre-refractive index film layer is exposed, for example, with a positive photoresist, in the embodiment of the present invention, the pre-refractive index film layer (a dotted line portion in the figure) that is not shielded by the light shielding film ZG may be removed, and a region of the pre-refractive index film layer corresponding to the light shielding film ZG is reserved to form the first film layer 1311. And repeating the steps in sequence until a plurality of film layer parts with different refractive indexes and close contact with each other are formed on the substrate in sequence, so as to finally form a first refractive index film layer with the refractive index gradually increasing or gradually decreasing from the central area to the edge area of the cover plate. And evaporating a second refractive index film layer on one side of the first refractive index film layer, which is far away from the substrate, wherein the refractive index of the second refractive index film layer is the same in all positions in a plane parallel to the substrate.
In accordance with the present invention, the above experimental examples are not exhaustive and do not limit the invention to the specific experimental examples. Obviously, many modifications and variations are possible in light of the above teaching. The experimental examples were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention and various embodiments with various modifications as are suited to the particular use contemplated. The invention is limited only by the claims and their full scope and equivalents.

Claims (13)

1. A cover plate for a display panel, comprising:
the light source comprises a substrate, a light source and a light emitting layer, wherein the light incident surface and the light emitting surface are opposite to each other in the thickness direction of the substrate;
the antireflection film is provided with a first refractive index film layer and a second refractive index film layer, the refractive index of the first refractive index film layer is larger than that of the second refractive index film layer, the first refractive index film layer and the second refractive index film layer are alternately stacked on the light incident surface and/or the light emergent surface, the substrate is a curved substrate, and a plurality of antireflection films are stacked on the light emergent surface;
in each antireflection film, the difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer in the thickness direction of the antireflection film is gradually increased from the central area to the edge area of the cover plate in a first direction parallel to the curved track of the light-emitting surface;
or, the light exit surface is a convex curved surface, the light entrance surface is a concave curved surface, and in each antireflection film, the difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer in the thickness direction of the antireflection film is gradually decreased from the central area to the edge area of the cover plate in a second direction parallel to the curved track of the light exit surface.
2. The cover plate as claimed in claim 1, wherein the light exit surface is a concave curved surface, the light entrance surface is a convex curved surface, and in each of the antireflection films, the refractive index of the first refractive index film layer is gradually increased from the central region to the edge region of the cover plate in the first direction, and the refractive index of the second refractive index film layer is the same everywhere in the curved surface parallel to the light exit surface.
3. The cover sheet according to claim 1, wherein the light emitting surface is a concave curved surface, the light incident surface is a convex curved surface, the refractive index of the second refractive index film layer decreases from the central region to the edge region of the cover sheet in the first direction, and the refractive index of the first refractive index film layer is the same everywhere in the curved surface parallel to the light emitting surface.
4. The cover sheet according to claim 1, wherein the light exit surface is a concave curved surface and the light incident surface is a convex curved surface, and in each of the antireflection films, the refractive index of the first refractive index film layer is the same everywhere in a curved surface parallel to the light exit surface, and the second refractive index film layer has SiO x N y Material by adjusting said SiO x N y The nitrogen-to-oxygen ratio in the material is such that the refractive index of the second refractive index film layer is in a descending distribution from the central area to the edge area of the cover plate in the first direction; or,
in each antireflection film, the refractive index of the second refractive index film layer is the same at each position in a curved surface parallel to the light emergent surface, and the first refractive index film layer is provided with SiO x N y Material by adjusting said SiO x N y The nitrogen-oxygen ratio in the material enables the refractive index of the first refractive index film layer to be distributed in an increasing mode from the central area to the edge area of the cover plate in the first direction.
5. The cover sheet according to claim 1,
the light emitting surface is a convex curved surface, the light incident surface is a concave curved surface, in each antireflection film, in the second direction, the refractive index of the first refractive index film layer is distributed in a descending manner from the central area to the edge area of the cover plate, and the refractive index of the second refractive index film layer is the same at each position in the curved surface parallel to the light emitting surface.
6. The cover plate as claimed in claim 1, wherein the light exit surface is a convex curved surface, the light entrance surface is a concave curved surface, and in each of the antireflection films, the refractive index of the second refractive index film layer is gradually increased from the central region to the edge region of the cover plate in the second direction, and the refractive index of the first refractive index film layer is the same everywhere in the curved surface parallel to the light exit surface.
7. The cover plate according to claim 1, wherein in a light exiting direction of the cover plate, an equivalent refractive index of the antireflection film near the light exiting surface is higher than an equivalent refractive index of the antireflection film far from the light exiting surface in two adjacent antireflection films.
8. The decking of claim 7,
the refractive index of each antireflection film corresponding to the second refractive index film layer decreases progressively along the light emergent direction of the cover plate, and the refractive index of the first refractive index film layer of the antireflection film far away from the light emergent surface in the two adjacent antireflection films is higher than the refractive index of the second refractive index film layer of the antireflection film close to the light emergent surface.
9. The cover sheet according to claim 1, wherein the refractive index of the first refractive index film layer ranges from 1.5 to 4, and the refractive index of the second refractive index film layer ranges from 1 to 1.5.
10. The cover sheet of any of claims 1-9, further comprising a third layer of refractive index disposed on a side of the antireflection film facing away from the substrate, the third layer of refractive index having a refractive index lower than the refractive index of the first layer of refractive index and the refractive index of the second layer of refractive index.
11. A display panel, comprising:
a display substrate having a light emitting surface;
a cover plate according to any one of claims 1 to 10, the cover plate being provided on the light exit surface side of the display substrate, and the substrate being closer to the display substrate than the antireflection film.
12. A method for manufacturing a cover plate is characterized by comprising the following steps:
providing a substrate, wherein the substrate is provided with a light incident surface and a light emergent surface which are opposite to each other in the thickness direction of the substrate;
forming an antireflection film, alternately preparing N first refractive index film layers and N second refractive index film layers on the light incident surface and/or the light emergent surface so as to correspondingly form N antireflection films which are stacked, wherein N is greater than or equal to 1 and is an integer, the refractive index of the first refractive index film layer is greater than that of the second refractive index film layer, the substrate is a curved substrate, and the plurality of antireflection films are stacked on the light emergent surface,
the light emitting surface is a concave curved surface, the light incident surface is a convex curved surface, and in each antireflection film, the difference between the refractive indexes of the first refractive index film layer and the second refractive index film layer in the thickness direction of the antireflection film is distributed in an increasing manner from the central area to the edge area of the cover plate in a first direction parallel to the curved track of the light emitting surface;
or, the light exit surface is a convex curved surface, the light entrance surface is a concave curved surface, and in each antireflection film, the difference between the refractive index of the first refractive index film layer and the refractive index of the second refractive index film layer in the thickness direction of the antireflection film is gradually decreased from the central area to the edge area of the cover plate in a second direction parallel to the curved track of the light exit surface.
13. The manufacturing method according to claim 12, wherein in the step of forming an antireflection film, the method comprises:
preparing each first refractive index film layer and each second refractive index film layer by any one of photolithography, chemical vapor deposition, physical vapor deposition, screen printing and spraying,
so that the refractive index of each first refractive index film layer is the same in all places in a plane parallel to the substrate, and the refractive index of the second refractive index film layer is in descending or ascending distribution from the central area to the edge area of the cover plate in the plane parallel to the substrate; or, the refractive index of each second refractive index film layer is the same in all places in a plane parallel to the substrate, and the refractive index of the first refractive index film layer is distributed in a descending or ascending manner from the central area to the edge area of the cover plate in the plane parallel to the substrate.
CN202011640113.XA 2020-12-31 2020-12-31 Cover plate, display panel and manufacturing method of cover plate Active CN112785926B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011640113.XA CN112785926B (en) 2020-12-31 2020-12-31 Cover plate, display panel and manufacturing method of cover plate

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011640113.XA CN112785926B (en) 2020-12-31 2020-12-31 Cover plate, display panel and manufacturing method of cover plate

Publications (2)

Publication Number Publication Date
CN112785926A CN112785926A (en) 2021-05-11
CN112785926B true CN112785926B (en) 2023-04-14

Family

ID=75755120

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011640113.XA Active CN112785926B (en) 2020-12-31 2020-12-31 Cover plate, display panel and manufacturing method of cover plate

Country Status (1)

Country Link
CN (1) CN112785926B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114360383A (en) * 2022-01-11 2022-04-15 武汉华星光电半导体显示技术有限公司 Cover plate assembly and manufacturing method thereof
TWI866261B (en) * 2023-06-06 2024-12-11 台亞半導體股份有限公司 Structure and manufacturing method of curved cover plate for automobiles

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08129169A (en) * 1994-10-31 1996-05-21 Toyobo Co Ltd Liquid crystal display device
CN1291248C (en) * 2003-06-04 2006-12-20 鸿富锦精密工业（深圳）有限公司 Light conducting board and area source apparatus
CN100397193C (en) * 2005-11-30 2008-06-25 力特光电科技股份有限公司 Polarizing device and display having the same
CN101047463B (en) * 2006-10-25 2012-05-23 浙江大学 Multi-channel wavelength space decomplex film device based on two-end thickness decreasing structure
CN101470251A (en) * 2007-12-26 2009-07-01 上海浦济光学技术有限公司 Novel wide-angle lens of endoscope
JP2012237928A (en) * 2011-05-13 2012-12-06 Fujifilm Corp Optical film, polarizing plate, image display device and three-dimensional image display system
TWI488296B (en) * 2012-06-14 2015-06-11 Au Optronics Corp Organic electroluminescent display panel and manufacturing method thereof
CN106383416B (en) * 2016-12-02 2019-05-31 宁波视睿迪光电有限公司 A kind of display device and preparation method thereof
CN109283601A (en) * 2017-07-17 2019-01-29 张家港康得新光电材料有限公司 Gradually changed refractive index laminated film and preparation method thereof
CN110473984B (en) * 2019-08-27 2021-12-24 昆山工研院新型平板显示技术中心有限公司 Display panel, display device and preparation method of display panel
CN111399090B (en) * 2020-05-14 2024-08-30 浙江舜宇光学有限公司 Optical lens, method for manufacturing optical lens, and optical imaging device
CN111969030A (en) * 2020-08-31 2020-11-20 京东方科技集团股份有限公司 Backboard, display panel, display device and electronic equipment

Also Published As

Publication number Publication date
CN112785926A (en) 2021-05-11

Similar Documents

Publication Publication Date Title
CN111508343B (en) Display panel and display device
CN111509020B (en) Flexible display panel and display device
CN109920938B (en) OLED display panel and OLED display device
KR100478574B1 (en) Reflector and reflective liquid crystal display
US5724182A (en) Optical sheet and a light transmission screen using the same
CN112785926B (en) Cover plate, display panel and manufacturing method of cover plate
TWI567413B (en) Composite substrate structure and touch-sensitive device
WO2002025324A1 (en) Low reflection, high transmission, touch-panel membrane
CN109920936A (en) A display panel, its manufacturing method and display device
EP3982198B1 (en) Projection screen
US10082719B2 (en) Liquid crystal lens and 3D display
CN113066842A (en) Display panel, display device and preparation method of display panel
US20220413375A1 (en) Projection screen, manufacturing method thereof, projection display system, and projection display method
JP2014102356A (en) Optical film and production method of the same
JP2008039960A (en) Laminated film
US20230244100A1 (en) Display Screen, Display Screen Protective Film and Electronic Device
CN208737486U (en) Shield lower optical fingerprint identification device and electronic equipment
CN110376782B (en) Display panel and display device
US11892766B2 (en) Projection screen
CN111562644B (en) Optical waveguide device and AR display device
US20230058463A1 (en) Optical member
JPH07192660A (en) Image display device
CN114815372B (en) Display panel and display device
US6791642B1 (en) Liquid crystal display with a Fresnel lens reflective layer
CN215299293U (en) Display panel

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant