CN113156655B - Electronic device for under-screen camera shooting - Google Patents
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- CN113156655B CN113156655B CN202110418295.4A CN202110418295A CN113156655B CN 113156655 B CN113156655 B CN 113156655B CN 202110418295 A CN202110418295 A CN 202110418295A CN 113156655 B CN113156655 B CN 113156655B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/42—Diffraction optics, i.e. systems including a diffractive element being designed for providing a diffractive effect
Abstract
The application discloses an electronic device for under-screen camera shooting, which comprises a display screen and a diffraction suppression optical component, wherein the display screen allows light to pass through the display screen and comprises a pixel layer, and the pixel layer comprises shading strips which are periodically arranged around pixel units; the diffraction suppressing optical member is formed as a sheet member including a first region arranged in a two-dimensional periodicity and a second region arranged around the first region in a substantially stripe shape, the first region being a light-transmitting region, wherein the second region has a shape generated by random misalignment of a plurality of cell patterns arranged along an extending direction of the stripe shape in a transverse direction perpendicular to the extending direction, and the second region is opaque, wherein the diffraction suppressing optical member is disposed so as to cover at least a part of the region of the pixel layer such that the second region corresponds to a light shielding band of the display screen. According to the present application, diffraction due to the periodic structure of the pixel unit in the under-screen image pickup device can be suppressed, and the imaging quality can be improved.
Description
The application is a divisional application of patent application with the application number of 202010035985.7, the application date of 2020, 1 month and 14 days, jiaxing control optoelectric technology Co., ltd, and the application name of 'diffraction suppressing optical component, diffraction suppressing display screen and under-screen camera device'.
Technical Field
The present application relates generally to an under-screen image capturing technology, and more particularly, to an electronic device for under-screen image capturing.
Background
Photographing and displaying have become necessary functions of a smart phone, and a front camera of the smart phone is very important. Because the front camera can not only meet the requirement of self-timer, but also has larger application in the aspects of face recognition and content interaction. Therefore, the front camera has become indispensable in the cellular phone.
Meanwhile, along with the improvement of the functionality of the smart phone, the large-screen mobile phone accords with market trend. The screen cannot be expanded infinitely, so that the requirement on the high-screen-ratio mobile phone is vigorous, the full-screen is convenient, but the full-screen cannot be realized well all the time due to the front camera.
In order to solve the problem that the front camera affects the realization of the full screen, the prior art proposes to place the front camera under the screen to realize the complete hiding of the front camera, thereby completely realizing the full screen. But has a larger influence on the shooting effect of the under-screen camera due to the existence of the display screen. In particular, the unit pixels arranged periodically may form a starburst effect due to a diffraction effect under strong light irradiation, thereby affecting imaging quality.
Therefore, a new under-screen imaging technique is required to suppress the starburst effect caused by diffraction, thereby improving the imaging quality of the under-screen imaging.
Disclosure of Invention
An object of the present application is to provide a diffraction suppressing optical member which can be used to suppress diffraction in an under-screen image pickup device, thereby improving imaging quality.
According to an aspect of the present application, there is provided an electronic apparatus for under-screen image pickup, including: a display screen allowing light to pass therethrough, the display screen comprising a pixel layer comprising light shielding strips periodically arranged around the pixel cells; and a diffraction suppressing optical member formed as a sheet member including a first region arranged in a two-dimensional periodicity and a second region arranged around the first region in a substantially stripe shape, the first region being a light-transmitting region, wherein the second region has a shape resulting from random misalignment of a plurality of cell patterns arranged along an extending direction of the stripe shape in a transverse direction perpendicular to the extending direction, and the second region is opaque, wherein the diffraction suppressing optical member is disposed so as to cover at least a partial region of the pixel layer such that the second region and the light shielding tape of the display screen correspond to each other.
Preferably, the plurality of unit patterns have similar shapes.
According to some embodiments, the cell pattern may be a parallel hexagon having a pair of short sides and two pairs of long sides, and the pair of short sides of the parallel hexagon are parallel to a diagonal line obtained by connecting two vertices sandwiched by the two pairs of long sides. Preferably, the direction of the diagonal lines of the parallel hexagons is perpendicular to the extending direction of the strip shape. More preferably, the length of the short sides of the parallel hexagons is a, the length of the diagonal is d, and d=5a is satisfied.
In some advantageous embodiments, a plurality of said parallel hexagons are randomly biased in a transverse direction of said stripe shape and satisfy the following probability distribution function:
where ζ is the offset distance of the parallel hexagons in the transverse direction of the stripe shape, and d is the length of the diagonal of the parallel hexagons.
According to other embodiments, the unit pattern may have a rectangular or line segment shape, and a length direction of the unit pattern is perpendicular to an extending direction of the stripe shape, and an aspect ratio of the unit pattern is 2 or more, preferably 5 or more.
In some advantageous embodiments, the plurality of cell patterns may have the same length/and width τ, the plurality of cell patterns being randomly biased in a lateral direction of the stripe shape, and the random bias satisfying the probability distribution function:
where ζ is the offset distance of the unit pattern in the lateral direction of the stripe shape.
In other advantageous embodiments, the plurality of unit patterns may have different lengths, and the plurality of unit patterns have a length of l or more min And less than or equal to l max Wherein l is a random value of min For the minimum length of a plurality of unit patterns, l max Is the maximum length of the plurality of unit patterns. Preferably, the center positions of the plurality of unit patterns may be also randomly offset in the lateral direction of the stripe shape.
According to another aspect of the present application, there is also provided an electronic apparatus for under-screen image pickup, including: a display screen allowing light to pass therethrough, the display screen comprising a pixel layer comprising light shielding strips periodically arranged around the pixel cells; and a diffraction suppressing optical member formed as a sheet member including a first region arranged in a two-dimensional periodicity and a second region arranged around the first region in a substantially stripe shape, the second region including a central region and a transition region located at an edge of the central region, the first region being a light-transmitting region, the second region being a light-opaque region, wherein the transition region has a plurality of cell patterns arranged along an extending direction of the stripe shape, the plurality of cell patterns extending from an edge position of the central region toward the first region in a lateral direction perpendicular to the extending direction, the plurality of cell patterns having different lengths in the lateral direction so as to form random misalignment in the lateral direction, wherein the diffraction suppressing optical member is disposed to cover at least a partial region of the pixel layer such that the second region and the light shielding tape of the display screen correspond to each other.
Preferably, the unit patterns have a rectangular or line segment shape, and the lengths of the plurality of unit patterns in the lateral direction are equal to or greater than l min And less than or equal to l max Wherein l is a random value of min For the minimum length of the plurality of unit patterns, l max Is the maximum length of the plurality of unit patterns.
The sheet may, for example, comprise a transparent substrate and an opaque cover layer fabricated on the transparent substrate. Alternatively, the sheet may be made of an opaque base material and formed with a hollowed-out portion.
In other embodiments, the sheet may be laminated by a first sheet member on which light-transmitting regions periodically arranged in a first direction are formed and a second sheet member on which light-transmitting regions periodically arranged in a second direction are formed, the first and second directions intersecting each other.
In the electronic device for under-screen shooting according to the embodiment of the application, the diffraction suppression optical component is designed to destroy the structural periodicity of the pixel unit and the light shielding band, so that diffraction effects are suppressed, particularly starburst effects existing when the under-screen shooting device shoots are improved, and the imaging quality of under-screen shooting is improved.
Drawings
Other features, objects and advantages of the present application will become more apparent upon reading of the detailed description of non-limiting embodiments, made with reference to the following drawings in which:
fig. 1 schematically shows one example of an electronic device incorporating an under-screen image pickup device according to an embodiment of the present application;
fig. 2 is a system schematic diagram of an under-screen camera device according to a first embodiment of the present application;
FIG. 3 schematically illustrates an example of a diffraction-suppressed display screen that may be used with the off-screen camera device shown in FIG. 2;
FIG. 4 schematically illustrates a simplified example of a pixel layer in a display screen of the diffraction-suppressed display screen of FIG. 3;
FIG. 5 schematically illustrates a first embodiment of a diffraction-suppressing optical component that may be used in the off-screen imaging apparatus shown in FIG. 2;
FIG. 6 shows a cell pattern in the first embodiment of the diffraction suppressing optical member shown in FIG. 5;
FIG. 7 schematically illustrates a pattern of opaque regions obtained after the pixel layer of FIG. 4 has been overlaid with the first embodiment of the diffraction suppressing optical component of FIG. 5;
FIG. 8 schematically illustrates a second embodiment of a diffraction-suppressing optical component useful in the off-screen imaging apparatus shown in FIG. 2;
FIGS. 9, 10 and 11 schematically illustrate different examples of the second region in the second embodiment of the diffraction-suppressing optical member shown in FIG. 8;
FIG. 12 schematically illustrates a pattern of opaque regions obtained after the pixel layer of FIG. 4 has been overlaid with the second embodiment of the diffraction suppressing optical component of FIG. 8;
FIG. 13 schematically illustrates a modification of the diffraction-suppressing optical member shown in FIG. 8;
fig. 14 is a system schematic diagram of an under-screen image capturing apparatus according to the second embodiment of the present application;
FIG. 15 schematically illustrates one example of a diffraction-suppressed display screen usable with the off-screen image pickup apparatus shown in FIG. 14;
FIG. 16 schematically illustrates another example of a diffraction-suppressed display screen usable with the off-screen image capture device of FIG. 14;
FIG. 17 schematically illustrates one example of a pixel layer of the diffraction-suppressed display screen of FIG. 16; and
fig. 18 is a graph of simulation data of one specific example of the application of the diffraction suppressing optical member according to the present application.
Detailed Description
The application is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the application are shown in the drawings.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
Fig. 1 schematically shows an example of an electronic device incorporating an under-screen camera device 1 according to an embodiment of the application, a smartphone 2. In the illustrated example, the smartphone 2 may have a full screen, and the under-screen camera device 1 may be configured under at least a partial area of the full screen.
Fig. 2 is a system schematic diagram of an under-screen image pickup apparatus 1 according to a first embodiment of the present application. As shown in fig. 2, the under-screen image pickup apparatus 1 includes a display screen 10, a diffraction suppressing optical member 20, and a camera 30. The display screen 10 allows light to pass therethrough and has a display surface 10a for display. The diffraction suppressing optical member 20 is provided on one side of the display panel 10, preferably on the back side of the display panel 10 opposite to the display surface 10a as shown in fig. 2. The display panel 10 and the diffraction suppressing optical member 20 constitute a diffraction suppressing display panel 100 according to an embodiment of the present application. The display surface 10a is also configured as a display surface of the diffraction suppressing display panel 100. The camera 30 is disposed on the opposite side of the diffraction suppressing display screen 100 from the display surface 10a, and receives and images light transmitted through the display screen 10 and the diffraction suppressing optical member 20. As shown in fig. 2, the camera 30 includes, for example, an imaging lens 31 and an image sensor 32.
Light from the object 3 located on the display surface 10a side of the display screen 10 passes through the display screen 10 and the diffraction suppressing optical member 20, and irradiates the camera 30 provided under the screen, so that the camera 30 can image the object 3.
Fig. 3 shows more clearly one example of a diffraction-suppressed display screen 100 that may be used with the off-screen camera device shown in fig. 2. As shown in fig. 3, the display screen 10 includes the pixel layer 11, and the diffraction suppressing optical member 20 may cover only a partial area of the display screen 10, and thus only a partial area of the pixel layer 11.
As shown in fig. 4, the pixel layer 11 of the display screen 10 includes pixel units 11a arranged periodically and a light shielding tape 11b arranged around the pixel units 11 a. The shading band 11b may comprise a plurality of shading bands, for example in two different directions intersecting each other (preferably perpendicular). The light shielding tape 11b is constituted by, for example, metal gate lines, such as data lines or address lines, in the pixel layer 11.
Due to the periodic arrangement of the pixel units 11a, the arrangement of the light shielding strips 11b correspondingly exhibits periodicity, so that diffraction effects are generated for light transmitted through the display screen 10, thereby affecting the imaging effect of the camera 30. For this reason, according to an embodiment of the present application, a diffraction suppressing optical member 20 is provided.
As will be described in detail below in connection with the different embodiments, the diffraction suppressing optical member 20 is formed as a sheet member including first areas 21 arranged in a two-dimensional periodicity and second areas 22 arranged around the first areas 21 in a substantially stripe shape (see fig. 5, 8 and 13). The first region 21 is a light-transmitting region, the second region 22 has a shape resulting from random misalignment of the plurality of unit patterns 22a, 22b arranged along the extending direction of the stripe shape in the transverse direction perpendicular to the extending direction, and the second region 22 is light-impermeable at least on both side edge portions thereof. Preferably, the plurality of unit patterns have similar shapes.
It should be noted that the first region 21 here comprises a plurality of first regions 21, while the second region 22 also comprises a plurality of second regions 22 in the form of strips along different directions of extension, each strip-shaped second region 22 having a direction of extension and a transverse direction defined with respect to the strip shape of the second region 22 itself.
The diffraction suppression optical component provided by the embodiment of the application is designed to destroy the structural periodicity of the pixel units and the light shielding bands, so that diffraction effects are suppressed, especially starburst effects existing in the shooting process of the existing under-screen shooting device are improved, and the imaging quality of the under-screen shooting is improved.
Fig. 5 schematically illustrates a first embodiment of a diffraction suppressing optical member 20A usable in the under-screen image pickup apparatus 1 shown in fig. 2. As shown in fig. 5, the cell patterns 22a in the second region 22 of the diffraction suppressing optical member 20A are parallel hexagons, and the plurality of cell patterns 22a are identical. In this embodiment, the second region 22 is generally opaque.
As shown more clearly in fig. 6 (a), the cell pattern 22a is a parallel hexagon having a pair of short sides and two pairs of long sides, and one pair of short sides of the parallel hexagon is parallel to a diagonal line obtained by connecting two vertices sandwiched by the two pairs of long sides. As further shown in fig. 6 (a), the length of the short side of the parallel hexagon is a and the length of the diagonal line is d, and according to this embodiment, d=5a is preferably satisfied.
According to the present embodiment, the directions of the diagonal lines of the parallel hexagons of the cell pattern 22a are perpendicular to the extending direction x of the stripe shape of the second region 22, and random misalignment occurs in the transverse direction y perpendicular to the extending direction x, as shown in fig. 6 (b).
According to the present embodiment, it is preferable that a plurality of parallel hexagons as the cell patterns 22a are randomly biased in the lateral direction y and satisfy the following probability distribution function:
where ζ is the offset distance of the parallel hexagons in the transverse direction of the stripe shape, and d is the length of the diagonal of the parallel hexagons.
In use, the diffraction suppressing optical member 20A covers at least part of the area of the display screen 10 and thus only at least part of the area of the pixel layer 11, such that the second area 22 of the diffraction suppressing optical member 20A corresponds to the light shielding tape 11b in the display screen 10. Fig. 7 schematically illustrates a pattern of opaque regions obtained after the pixel layer 11 in the display panel 10 illustrated in fig. 4 is overlapped with the diffraction suppressing optical member 20A illustrated in fig. 5. It can be seen that the opaque second region 22 is superimposed on the light shielding tape 11b of the pixel layer 11, forming a random irregular light shielding edge, and destroying the periodicity of the light shielding tape structure, thereby achieving a diffraction suppressing effect, particularly a suppressing effect on higher-order diffraction, such as a starburst effect when shooting by an under-screen image pickup device.
Fig. 8 schematically illustrates a second embodiment of a diffraction suppressing optical member, namely, a diffraction suppressing optical member 20B, which can be used in the under-screen image pickup apparatus shown in fig. 2. As shown in fig. 8, the cell pattern 22B in the second region 22 of the diffraction suppressing optical member 20B is rectangular or line-segment-shaped, and the length direction of the cell pattern 22B is perpendicular to the extending direction of the stripe shape of the second region 22. Preferably, the aspect ratio of the unit pattern 22b is 2 or more; more preferably, the aspect ratio is 5 or more. As shown in fig. 8, according to the present embodiment, a plurality of unit patterns 22B are randomly displaced perpendicularly to the extending direction of the stripe shape, forming a series of burrs having random lengths protruding toward the light-transmitting first region 21 of the diffraction suppressing optical component 20B.
The diffraction suppressing optical member 20B is formed such that the second region 22 as a whole is opaque.
Different examples of the diffraction suppressing optical member 20B will be described below with reference to fig. 9, 10, and 11.
Fig. 9 shows an example one of the diffraction suppressing optical member 20B. As shown in fig. 9 (a), the plurality of cell patterns 22b-1 have the same length l and width τ (see fig. 9 (a); as shown in fig. 9 b, the plurality of cell patterns 22b-1 are randomly offset (position offset) in the transverse direction y of the stripe shape of the second region 22.
Preferably, the random bias of the cell pattern 22b-1 satisfies the following probability distribution function:
where ζ is the offset distance of the cell pattern 22b-1 in the transverse direction y of the stripe shape.
Fig. 10 shows an example two of the diffraction suppressing optical member 20B. In the example shown in fig. 10, the plurality of unit patterns 22b-2 have different lengths, and the lengths of the plurality of unit patterns 22b-2 are equal to or greater than l min And less than or equal to l max Wherein l is a random value of min For the minimum length of the plurality of unit patterns, l max Is the maximum length of the plurality of unit patterns. l (L) min For example, may be zero.
In the examples shown in fig. 9 and 10, the "random burrs" formed due to the random offset or random length are complementary or symmetrical at opposite edges of the second region. In order to obtain a more random edge structure, a configuration shown in fig. 11 is further proposed in which, as shown in fig. 11, a plurality of cell patterns 22b-3 not only have random length values but also have their center positions randomly offset in the lateral direction y. This is advantageous in further improving the diffraction suppressing effect.
In use, the second region 22 of the diffraction suppressing optical member 20B and the light shielding tape 11B in the display panel 10 are superimposed in correspondence with each other. Fig. 12 schematically illustrates a pattern of opaque regions obtained after the pixel layer 11 in the display panel 10 illustrated in fig. 4 is overlapped with the diffraction suppressing optical member 20B illustrated in fig. 8. It can be seen that the opaque second region 22 is superimposed on the light shielding tape 11b of the pixel layer 11, forming a light shielding edge with random burrs, and destroying the periodicity of the light shielding tape structure, thereby achieving a diffraction suppressing effect, particularly a suppressing effect on higher-order diffraction, such as the starburst effect when captured by an under-screen imaging device.
Fig. 13 further shows a modification of the diffraction suppressing optical member 20C shown in fig. 8. The diffraction suppressing optical member 20C has substantially the same configuration as the diffraction suppressing optical member 20B, except that the second region 22' in the diffraction suppressing optical member 20C is opaque only at both side edge portions thereof. As can be seen from fig. 12, the area where the diffraction suppressing display 100 actually blocks light when in use is determined by overlapping the light shielding band in the pixel layer with the opaque portion in the second area of the diffraction suppressing optical member, and the second area can achieve the diffraction suppressing effect as long as it can provide a randomly irregular light shielding edge for the integrally formed light shielding area.
Considering the different examples of the diffraction-suppressing optical component shown in fig. 8 and 13 in combination, it can be seen that in the diffraction-suppressing optical component according to an embodiment of the present application, the second region may further include a central region and a transition region located at an edge of the central region; the first area of the diffraction suppression optical component is a light transmission area, and the transition area of the second area is a light-proof area; the transition region has a plurality of unit patterns arranged along an extending direction of the stripe shape of the second region, the plurality of unit patterns extending from an edge position of a central region of the second region toward the first region in a lateral direction perpendicular to the extending direction, the plurality of unit patterns having different lengths in the lateral direction so as to form random dislocation in the lateral direction.
The central region of the second region may be opaque or transparent.
For example, the cell pattern may be rectangular or line-segment shaped as shown in fig. 9, 10, and 11. The plurality of unit patterns may have a length in the lateral direction of l or more min And less than or equal to l max Wherein l is a random value of min For the minimum length of the plurality of unit patterns, l max Is the maximum length of the plurality of unit patterns.
In some embodiments, the sheet of diffraction-suppressing optical component 20 may include a transparent substrate and an opaque cover layer fabricated on the transparent substrate. For example, a transparent glass substrate may be covered with an opaque metal material, such as cadmium, and then a UV gel is spin coated on the cadmium layer, the UV gel on the opaque region is cured and retained using a laser direct writing technique or a mask exposure technique, and then the UV gel on the transparent region is washed away, and then the metal of the transparent region is removed by dry or wet etching to form the transparent region. Alternatively, the sheet may be made of an opaque base material and formed with a hollowed-out portion.
In some embodiments, although not shown, the sheet of the diffraction suppressing optical component 20 may be laminated of a first sheet member on which light-transmitting areas periodically arranged in a first direction are formed and a second sheet member on which light-transmitting areas periodically arranged in a second direction are formed, the first and second directions intersecting each other.
Next, an under-screen image pickup apparatus according to a second embodiment of the present application and a diffraction suppressing display screen applied therein will be described with reference to fig. 14 to 17.
The under-screen image pickup apparatus 1' according to the second embodiment of the present application shown in fig. 14 has substantially the same structure as the under-screen image pickup apparatus 1 according to the first embodiment of the present application shown in fig. 2, except that a diffraction suppressing display screen 100' having a diffraction suppressing effect itself is employed in the under-screen image pickup apparatus 1 '.
Fig. 15 schematically shows a diffraction suppressing display screen 100'a usable for the under-screen image pickup apparatus 1'. As shown in fig. 15, the diffraction suppressing display screen 100' a has substantially the same configuration as the display screen 10, including the pixel layer 11 having the same structure, except that the diffraction suppressing optical member 20' is integrated in the diffraction suppressing display screen 100' a. The diffraction suppressing optical member 20' has the structure described above with reference to fig. 5 to 13, and is disposed such that the second region therein corresponds to the light shielding tape in the display screen pixel layer. The diffraction suppressing optical member 20' may be formed separately and sandwiched between the multilayer structures of the display panel, or may be formed integrally with other portions of the display panel, for example, at the pixel layer. As shown in fig. 15, the diffraction suppressing optical member 20' is preferably provided only in a partial area in the display screen.
Fig. 16 schematically shows a diffraction suppressing display screen 100'b usable for the under-screen image pickup apparatus 1'. The pixel layer 11 'of the diffraction suppressing display screen 100' b includes pixel units arranged periodically and a light shielding tape arranged around the pixel units, the light shielding tape having a stripe shape, wherein at least a partial region of the pixel layer, the light shielding tape has a shape resulting from random misalignment of a plurality of unit patterns arranged along an extending direction of the stripe shape in a lateral direction perpendicular to the extending direction. In other words, the light shielding tape in the pixel layer 11 'of the diffraction suppressing display screen 100' b has the configuration of the second region in the diffraction suppressing optical member according to the embodiment of the present application.
Fig. 17 shows an example of the pixel layer 11' in which the light shielding tape 11' B arranged around the pixel unit 11' a has a configuration corresponding to the second region 22 in the diffraction suppressing optical member 20B shown in fig. 8. The pixel layer 11' may also be configured to have a configuration corresponding to the second region of the other diffraction suppressing optical member, such as described above in connection with fig. 5 to 12, and will not be described again here.
It can be seen that such a diffraction suppressing display screen according to an embodiment of the present application allows light to pass therethrough and includes a pixel layer including pixel cells arranged periodically and a light shielding tape arranged around the pixel cells, the light shielding tape having a stripe shape, wherein at least a partial region of the pixel layer, the light shielding tape has a plurality of cell patterns arranged along an extending direction of the stripe shape, the plurality of cell patterns extending from edge positions of the light shielding tape toward the pixel cells in a lateral direction perpendicular to the extending direction, the plurality of cell patterns having different lengths in the lateral direction so as to form random misalignment in the lateral direction.
For example, the unit pattern may be rectangular or line-segment-shaped. Preferably, the lengths of the plurality of unit patterns are equal to or greater than l min And less than or equal to l max Wherein l is a random value of min For the minimum length of the plurality of unit patterns, l max Is the maximum length of the plurality of unit patterns.
Fig. 18 is a graph of simulation data of one specific example of the application of the diffraction suppressing optical member according to the present application. In this specific example, the diffraction suppressing optical member has "random burrs" as shown in fig. 8, which are configured in the manner shown in fig. 9, in which the length l=28 μm and the width τ=1 μm of the cell pattern constituting the "random burrs"; the pixel layer in the display panel to which the above-described diffraction suppressing optical member is applied has a configuration as shown in fig. 4, and in which the arrangement period p1=p2=100 μm of the pixel units in two directions perpendicular to each other, the width t1=t2=80 μm of the light transmitting region of the pixel units in the two directions, that is, the width of the light shielding band is 20 μm. The diffraction suppression simulation results obtained based on this specific example are shown in fig. 18. The upper half of fig. 18 shows simulation data, the lower half shows a graph corresponding to the simulation data, the abscissa in the graph represents the position of the diffraction order, the ordinate represents the amplitude of the diffraction order, the solid line represents the amplitude ratio before modulation, and the dash-dot line represents the amplitude ratio after continuous amplitude modulation. As can be seen from the figure, the diffraction suppressing optical member of the present application has a remarkable suppressing effect on diffraction orders of three or more orders, and thus has a reduced starburst effect as a whole.
The above description is only illustrative of the preferred embodiments of the present application and of the principles of the technology employed. It will be appreciated by persons skilled in the art that the scope of the application referred to in the present application is not limited to the specific combinations of the technical features described above, but also covers other technical features formed by any combination of the technical features described above or their equivalents without departing from the inventive concept. Such as the above-mentioned features and the technical features disclosed in the present application (but not limited to) having similar functions are replaced with each other.
Claims (16)
1. An electronic device for off-screen camera shooting, comprising:
a display screen allowing light to pass therethrough, the display screen comprising a pixel layer comprising light shielding strips periodically arranged around the pixel cells; and
a diffraction suppressing optical member formed as a sheet member including a first region arranged in a two-dimensional periodicity and a second region arranged around the first region in a substantially stripe shape, the first region being a light-transmitting region, wherein the second region has a shape resulting from random misalignment of a plurality of cell patterns arranged along an extending direction of the stripe shape in a transverse direction perpendicular to the extending direction, and the second region is light-impermeable,
wherein the diffraction suppressing optical member is disposed to cover at least a partial area of the pixel layer such that the second area and the light shielding band of the display screen correspond to each other.
2. The electronic device for off-screen imaging as set forth in claim 1, wherein the plurality of unit patterns have similar shapes.
3. The electronic device for under-screen image pickup as claimed in claim 2, wherein the cell pattern is a parallel hexagon having a pair of short sides and two pairs of long sides, and the pair of short sides of the parallel hexagon are parallel to a diagonal line obtained by connecting two vertices sandwiched by the two pairs of long sides.
4. An electronic device for off-screen imaging as defined in claim 3, wherein the direction of the diagonal of the parallel hexagons is perpendicular to the direction of extension of the stripe shape.
5. The electronic device for under-screen image pickup as claimed in claim 4, wherein a length of a short side of the parallel hexagon is a, a length of the diagonal is d, and d=5a is satisfied.
6. The electronic device for off-screen imaging as set forth in claim 4, wherein a plurality of the parallel hexagons are randomly offset in a transverse direction of the stripe shape and satisfy the following probability distribution function:
where ζ is the offset distance of the parallel hexagons in the transverse direction of the stripe shape, and d is the length of the diagonal of the parallel hexagons.
7. The electronic device for under-screen imaging according to claim 1, wherein the unit pattern is rectangular or line-segment-shaped, and a length direction of the unit pattern is perpendicular to an extending direction of the stripe shape, and an aspect ratio of the unit pattern is 2 or more.
8. The electronic device for under-screen image pickup according to claim 7, wherein an aspect ratio of the unit pattern is 5 or more.
9. The electronic device for off-screen imaging as set forth in claim 7, wherein the plurality of cell patterns have the same length l and width τ, the plurality of cell patterns are randomly biased in a lateral direction of the stripe shape, and the random bias satisfies a probability distribution function of:
where ζ is the offset distance of the unit pattern in the lateral direction of the stripe shape.
10. The electronic device for under-screen image pickup as claimed in claim 7, wherein the plurality of unit patterns have different lengths, and the plurality of unit patterns have a length of l or more min And less than or equal to l max Wherein l is a random value of min For the minimum length of a plurality of unit patterns, l max Is the maximum length of the plurality of unit patterns.
11. The electronic device for off-screen imaging according to claim 10, wherein center positions of the plurality of unit patterns are randomly offset in a lateral direction of the stripe shape.
12. An electronic device for off-screen camera shooting, comprising:
a display screen allowing light to pass therethrough, the display screen comprising a pixel layer comprising light shielding strips periodically arranged around the pixel cells; and
a diffraction suppressing optical member formed as a sheet member including a first region arranged in a two-dimensional periodicity and a second region arranged around the first region in a substantially stripe shape, the second region including a central region and a transition region located at an edge of the central region, the first region being a light-transmitting region, the second region being a light-opaque region, wherein the transition region has a plurality of cell patterns arranged along an extending direction of the stripe shape, the plurality of cell patterns extending from an edge position of the central region toward the first region in a lateral direction perpendicular to the extending direction, the plurality of cell patterns having different lengths in the lateral direction so as to form random dislocation in the lateral direction,
wherein the diffraction suppressing optical member is disposed to cover at least a partial area of the pixel layer such that the second area and the light shielding band of the display screen correspond to each other.
13. The electronic device for under-screen imaging according to claim 12, wherein the unit patterns have a rectangular or line segment shape, and the lengths of the plurality of unit patterns in the lateral direction are l or more min And less than or equal to l max Wherein l is a random value of min For the minimum length of the plurality of unit patterns, l max Is the maximum length of the plurality of unit patterns.
14. The electronic device for under-screen imaging according to any one of claims 1 to 13, wherein the sheet member comprises a transparent substrate and an opaque cover layer formed on the transparent substrate.
15. The electronic device for under-screen photography as claimed in any one of claims 1 to 13, wherein the sheet member is made of an opaque base material and is formed with a hollowed-out portion.
16. The electronic device for under-screen image pickup according to any one of claims 1 to 13, wherein the sheet is formed by stacking a first sheet member on which light-transmitting regions periodically arranged in a first direction are formed and a second sheet member on which light-transmitting regions periodically arranged in a second direction are formed, the first and second directions intersecting each other.
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| CN202110418295.4A CN113156655B (en) | 2020-01-14 | 2020-01-14 | Electronic device for under-screen camera shooting |
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| CN202010035985.7A CN111208648B (en) | 2020-01-14 | 2020-01-14 | Diffraction-suppressing optical member, diffraction-suppressing display panel, and under-panel imaging device |
| CN202110418295.4A CN113156655B (en) | 2020-01-14 | 2020-01-14 | Electronic device for under-screen camera shooting |
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| CN111710257B (en) * | 2020-06-02 | 2021-07-09 | 嘉兴驭光光电科技有限公司 | Diffraction-suppressed display screen and mobile terminal device |
| CN114512082B (en) * | 2020-11-16 | 2024-04-02 | 深圳市万普拉斯科技有限公司 | Display screen, method for driving display screen and display device |
| CN114609795B (en) * | 2020-12-09 | 2024-02-27 | 云谷（固安）科技有限公司 | Display panel and display device |
| CN114630015A (en) * | 2020-12-09 | 2022-06-14 | 云谷（固安）科技有限公司 | Camera module and display terminal |
| CN112687193B (en) * | 2020-12-28 | 2022-09-16 | 合肥维信诺科技有限公司 | Display panel |
| CN113311523B (en) * | 2021-06-24 | 2023-05-30 | 嘉兴驭光光电科技有限公司 | Diffraction suppressing optical member and diffraction suppressing display panel |
| CN113325498B (en) * | 2021-06-24 | 2023-05-30 | 嘉兴驭光光电科技有限公司 | Diffraction suppressing optical member and diffraction suppressing display panel |
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| CN111208648A (en) | 2020-05-29 |
| CN111208648B (en) | 2021-05-07 |
| CN113156655A (en) | 2021-07-23 |
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