CN113156655A - Diffraction-suppressing optical member - Google Patents
Diffraction-suppressing optical member Download PDFInfo
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- CN113156655A CN113156655A CN202110418295.4A CN202110418295A CN113156655A CN 113156655 A CN113156655 A CN 113156655A CN 202110418295 A CN202110418295 A CN 202110418295A CN 113156655 A CN113156655 A CN 113156655A
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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
Disclosed is a diffraction suppression optical member formed as a sheet member including a first region and a second region arranged periodically in two dimensions, the first region being a light-transmitting region, wherein the second region has a shape resulting from random misalignment in a lateral direction perpendicular to an extending direction of an edge thereof of a plurality of unit patterns arranged along the extending direction, and the second region is light-opaque. According to the invention, diffraction generated by the periodic structure of the pixel unit in the under-screen image pickup device can be inhibited, and the imaging quality is improved.
Description
The present application is a divisional application of an invention patent application having an application number of 202010035985.7, an application date of 14/1/2020, and an application name of "diffraction suppressing optical member, diffraction suppressing display screen, and under-screen image pickup device" from jiaxing yu optical electro-optical technology limited.
Technical Field
The present invention relates generally to the art of under-screen imaging and, more particularly, to diffraction-suppressed optical components that can be used to improve the quality of the under-screen image.
Background
Photographing and displaying are currently essential functions of smart phones, and the front camera of the smart phone is more important. The front camera can meet the self-photographing requirement and has a larger purpose in the aspects of face recognition and content interaction. Therefore, a front camera has become indispensable in a cellular phone.
Meanwhile, with the improvement of the functionality of the smart phone, the large-screen mobile phone more conforms to the market trend. Because the screen can not be infinitely enlarged, the requirement on a high-screen-ratio mobile phone is more vigorous, and the full-screen is smooth, but the full-screen cannot be well realized 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 below the screen to completely hide the front camera, thereby completely realizing the full screen. But due to the existence of the display screen, the shooting effect of the camera under the screen is greatly influenced. In particular, the unit pixels arranged periodically may form a starburst effect due to a diffraction effect under strong light irradiation, thereby affecting the imaging quality.
Therefore, a new under-screen image pickup technology is needed to suppress the starburst effect caused by diffraction, thereby improving the imaging quality of the under-screen image pickup.
Disclosure of Invention
An object of the present invention is to provide a diffraction suppressing optical member that can be used to suppress diffraction in an under-screen image pickup device, thereby improving the imaging quality.
According to an aspect of the present invention, there is provided a diffraction suppressing optical member formed as a sheet member including a first region and a second region arranged two-dimensionally and periodically, the first region being a light transmitting region, wherein the second region has a shape resulting from random misalignment in a lateral direction perpendicular to an extending direction of an edge thereof of a plurality of unit patterns arranged along the extending direction, and the second region is light opaque.
Preferably, the plurality of unit patterns have similar shapes.
According to some embodiments, the unit 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 direction of extension of the strip shape. More preferably, the length of the short side of the parallel hexagon is a, the length of the diagonal is d, and d is 5 a.
In some advantageous embodiments, a plurality of said parallel hexagons are randomly biased in a direction transverse to the edge of said second region and satisfy the following probability distribution function:
where ξ is the offset distance of the parallel hexagon in the lateral direction of the edge of the second region, d is the length of the diagonal of the parallel hexagon.
According to other embodiments, the unit patterns may have a rectangular or line segment shape, a length direction of the unit patterns is perpendicular to an extending direction of the edge of the second region, and an aspect ratio of the unit patterns is equal to or greater than 2, preferably, equal to or greater than 5.
In some advantageous embodiments, the plurality of unit patterns may have the same length l and width τ, the plurality of unit patterns may be randomly biased in a lateral direction of the edge of the second region, and the random bias satisfies a probability distribution function as follows:
where ξ is the offset distance of the unit figure in the lateral direction of the edge of the second region.
In other advantageous embodiments, the plurality of unit patterns may have different lengths, and the lengths of the plurality of unit patterns are equal to or greater than lminAnd is less than or equal to lmaxOf where l isminIs the minimum length of a plurality of unit patterns,/maxIs the maximum length of the plurality of unit patterns. Preferably, the center positions of the plurality of unit patterns may be randomly offset in a lateral direction of the edge of the second region.
According to another aspect of the present invention, there is also provided a diffraction suppressing optical member formed as a sheet member including a first region and a second region arranged two-dimensionally and periodically, the second region including a central region and a transition region at an edge of the central region, the first region being a light transmitting region, the transition region being a light non-transmitting region, wherein the transition region has a plurality of unit patterns arranged along an extending direction of the edge of the central region, the plurality of unit patterns extending from an edge position of the central region in a lateral direction perpendicular to the extending direction toward the first region, the plurality of unit patterns having different lengths in the lateral direction so as to form random misalignment in the lateral direction.
Preferably, the unit patterns are rectangular or line segment shaped, and the lengths of the plurality of unit patterns in the transverse direction are greater than or equal to lminAnd is less than or equal to lmaxOf where l isminIs the minimum length of the plurality of unit patterns,/maxIs the unit diagramsThe maximum length of the shape.
The second region may be entirely light-impermeable.
The sheet may, for example, comprise a transparent substrate and an opaque cover layer fabricated on the transparent substrate. Alternatively, the sheet member may be made of an opaque base material and formed with an engraved portion.
In other embodiments, the sheet member may be formed by laminating a first sheet member having light-transmitting regions periodically arranged in a first direction and a second sheet member having light-transmitting regions periodically arranged in a second direction, the first and second directions intersecting each other.
The diffraction suppression optical component provided by the embodiment of the invention is designed to destroy the structural periodicity of the pixel unit and the shading band, so that the diffraction effect is suppressed, particularly the starburst effect existing in the shooting of the under-screen camera device is improved, and the imaging quality of the under-screen camera is improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
fig. 1 schematically illustrates one example of an electronic device incorporating an off-screen image capture device according to an embodiment of the present invention;
fig. 2 is a system diagram of an off-screen image capturing apparatus according to a first embodiment of the present invention;
FIG. 3 schematically illustrates an example of a diffraction-suppressed display screen that may be used in the under-screen image capture 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 shown in 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 is superimposed with the first embodiment of the diffraction-inhibiting optical component of FIG. 5;
FIG. 8 schematically illustrates a second embodiment of a diffraction-suppressing optical component that may be used in the off-screen imaging apparatus shown in FIG. 2;
fig. 9, 10 and 11 schematically show different examples of the second region in the second embodiment of the diffraction suppression optical member shown in fig. 8;
FIG. 12 schematically depicts a pattern of opaque regions obtained after superposition of the pixel layer of FIG. 4 and the second embodiment of the diffraction-inhibiting optical component of FIG. 8;
FIG. 13 schematically illustrates a modification of the diffraction suppression optical component illustrated in FIG. 8;
fig. 14 is a system diagram of an off-screen image pickup apparatus according to a second embodiment of the present invention;
FIG. 15 schematically illustrates one example of a diffraction-suppressed display screen that may be used in the under-screen image capture device shown in FIG. 14;
FIG. 16 schematically illustrates another example of a diffraction-suppressed display screen that may be used in the under-screen image capture device shown in FIG. 14;
FIG. 17 schematically illustrates one example of a pixel layer of the diffraction-suppressed display screen shown in FIG. 16; and
fig. 18 is a simulation data chart of a specific example of applying the diffraction suppressing optical member according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and not restrictive of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 schematically shows one example of an electronic apparatus incorporating an off-screen image pickup apparatus 1 according to an embodiment of the present invention, a smartphone 2. In the illustrated example, the smartphone 2 may have a full-screen, and the off-screen camera 1 may be configured under at least a partial area of the full-screen.
Fig. 2 is a system diagram of the off-screen imaging apparatus 1 according to the first embodiment of the present invention. 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 screen 10, preferably on the back side of the display screen 10 opposite to the display surface 10a as shown in fig. 2. The display screen 10 and the diffraction suppressing optical member 20 constitute a diffraction suppressing display screen 100 according to an embodiment of the present invention. The display surface 10a is also configured as a display surface of the diffraction-suppressed display screen 100. The camera 30 is disposed on the opposite side of the diffraction suppression display screen 100 from the display surface 10a, and receives light transmitted through the display screen 10 and the diffraction suppression optical member 20 and forms an image. 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 is transmitted through the display screen 10 and the diffraction suppressing optical member 20, and is irradiated to the camera 30 provided under the screen, so that the camera 30 can image the object 3.
Fig. 3 more clearly illustrates one example of a diffraction-suppressed display screen 100 that may be used in the off-screen image capture device shown in fig. 2. As shown in fig. 3, the display screen 10 includes the pixel layer 11, and the diffraction suppression optical member 20 may be covered only on a partial area of the display screen 10, and thus only on a partial area of the pixel layer 11.
As shown in fig. 4, the pixel layer 11 of the display screen 10 includes pixel cells 11a arranged periodically and light-shielding stripes 11b arranged around the pixel cells 11 a. The light-shielding tape 11b may include, for example, a plurality of light-shielding tapes in two different directions intersecting (preferably perpendicular to) each other. The light-shielding tape 11b is formed of, for example, a metal gate line in the pixel layer 11, such as a data line or an address line.
Due to the periodic arrangement of the pixel units 11a, the arrangement of the light shielding strips 11b correspondingly exhibits periodicity, so that diffraction effect is generated on the light transmitted through the display screen 10, thereby affecting the imaging effect of the camera 30. To this end, according to an embodiment of the present invention, a diffraction suppressing optical member 20 is provided.
As will be described in detail below in connection with various embodiments, the diffraction suppressing optical member 20 is formed as a sheet member including first regions 21 arranged two-dimensionally and periodically and second regions 22 arranged around the first regions 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 a plurality of unit patterns 22a, 22b arranged along the extending direction of the stripe shape in the lateral direction perpendicular to the extending direction, and the second region 22 is light-opaque 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 extending in different directions, the direction of extension and the transverse direction of each strip-shaped second region 22 being defined with respect to the strip shape of the second region 22 itself.
The diffraction suppression optical component provided by the embodiment of the invention is designed to destroy the structural periodicity of the pixel unit and the shading band, so that the diffraction effect is suppressed, the starburst effect existing in the shooting of the existing under-screen shooting device is particularly improved, and the imaging quality of under-screen shooting is improved.
Fig. 5 schematically shows a first embodiment of a diffraction suppressing optical member, a diffraction suppressing optical member 20A, which can be used for the under-screen image pickup device 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 the same. In this embodiment, the second region 22 is opaque as a whole.
As more clearly shown 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 the 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 is d, and according to the present embodiment, it is preferable that d is 5 a.
According to the present embodiment, the direction of the diagonal lines of the parallel hexagons of the unit pattern 22a is 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 (b) of fig. 6.
According to the present embodiment, it is preferable that the plurality of parallel hexagons as the unit pattern 22a are randomly biased in the lateral direction y and satisfy the following probability distribution function:
where ξ 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 is overlaid on at least a partial region of the display screen 10 so as to be overlaid only on at least a partial region of the pixel layer 11, so that the second region 22 of the diffraction suppressing optical member 20A and the light shielding tape 11b in the display screen 10 correspond to each other. Fig. 7 schematically shows a pattern of opaque areas obtained after the pixel layer 11 in the display screen 10 shown in fig. 4 is superimposed with the diffraction suppressing optical member 20A shown in fig. 5. It can be seen that the opaque second region 22 is superimposed on the light-shielding band 11b of the pixel layer 11, forming a random irregular light-shielding edge, destroying the periodicity of the light-shielding band structure, thereby achieving a diffraction suppression effect, especially a suppression effect on higher order diffraction, such as starburst effect when an under-screen camera shoots.
Fig. 8 schematically illustrates a diffraction suppressing optical member 20B, which is a second embodiment of a diffraction suppressing optical member that can be used in the under-screen image pickup apparatus shown in fig. 2. As shown in fig. 8, the unit patterns 22B in the second region 22 of the diffraction suppressing optical member 20B are rectangular or line segment shaped, and the longitudinal direction of the unit patterns 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, the plurality of unit patterns 22B are randomly displaced perpendicular to the extending direction of the stripe shape, and a series of burrs having random lengths are formed protruding toward the light-transmitting first region 21 of the diffraction suppression optical member 20B.
The diffraction suppressing optical member 20B is formed so that the second region 22 is opaque as a whole.
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 members 20B. As shown in fig. 9 (a), the plurality of unit patterns 22b-1 have the same length l and width τ (see fig. 9 (a)); as shown in fig. 9 (b), a plurality of unit patterns 22b-1 are randomly biased (position shifted) in the transverse direction y of the stripe shape of the second region 22.
Preferably, the random bias of the unit pattern 22b-1 satisfies the following probability distribution function:
where ξ is the offset of the element graphic 22b-1 in the lateral direction y of the stripe shape.
Fig. 10 shows a second example 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 length of the plurality of unit patterns 22b-2 is l or moreminAnd is less than or equal to lmaxOf where l isminIs the minimum length of the plurality of unit patterns,/maxIs the maximum length of the plurality of unit patterns. lminFor example, may be zero.
In the examples shown in fig. 9 and 10, the "random spurs" formed due to random offsets or random lengths are in a complementary or symmetrical relationship at opposite edges of the second region. 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 unit patterns 22b-3 not only have random length values, but also their center positions are 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 screen 10 are superposed in correspondence with each other. Fig. 12 schematically shows a pattern of opaque areas obtained after the pixel layer 11 in the display screen 10 shown in fig. 4 is superposed with the diffraction suppressing optical member 20B shown in fig. 8. It can be seen that the opaque second region 22 is superimposed on the light-shielding band 11b of the pixel layer 11, forming a light-shielding edge with random burrs, destroying the periodicity of the light-shielding band structure, thereby achieving a diffraction suppression effect, especially a suppression effect on higher order diffraction, such as starburst effect when an under-screen camera shoots.
Fig. 13 further illustrates a modification of the diffraction suppression optical component shown in fig. 8, the diffraction suppression optical component 20C. 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 understood by referring to fig. 12 in combination, the area of the diffraction suppression display panel 100 that actually blocks light during use is determined by the overlapping of the light-blocking bands in the pixel layer and the opaque portions in the second area of the diffraction suppression optical member, which can achieve the diffraction suppression effect as long as the second area can provide random irregular light-blocking edges for the light-blocking area as a whole.
Considering the different examples of the diffraction suppressing optical members shown in fig. 8 and 13 in combination, it can be seen that, in the diffraction suppressing optical member according to the embodiment of the present invention, 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-transmitting area, and the transition area of the second area is a light-tight area; the transition region has a plurality of unit patterns arranged along an extending direction of the second region stripe shape, 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 offsets in the lateral direction.
The central region of the second region may be opaque or transparent.
For example, the cell pattern may have a rectangular or line shape as shown in fig. 9, 10, and 11. The plurality of unit patterns may have a length l or more in the transverse directionminAnd is less than or equal to lmaxOf where l isminIs the minimum length of the plurality of unit patterns,/maxIs the maximum length of the plurality of unit patterns.
In some embodiments, the sheet of diffraction suppression optical component 20 may include a transparent substrate and an opaque cover layer fabricated on the transparent substrate. For example, a transparent glass substrate can be covered with a layer of opaque metal material, such as cadmium, then a UV glue is spun on the cadmium layer, the UV glue on the opaque region is cured and remained by using a laser direct writing technology or a mask exposure technology, then the UV glue on the transparent region is cleaned, and then the metal of the transparent region is removed by dry etching or wet etching to form the transparent region. Alternatively, the sheet member may be made of an opaque base material and formed with cutouts.
In some embodiments, although not shown, the sheet of the diffraction suppressing optical part 20 may be formed by laminating 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 direction and the second direction crossing each other.
Next, an image pickup apparatus under a screen according to a second embodiment of the present invention and a diffraction-suppressed display screen applied thereto will be described with reference to fig. 14 to 17.
The off-screen imaging apparatus 1 ' according to the second embodiment of the present invention shown in fig. 14 has substantially the same structure as the off-screen imaging apparatus 1 according to the first embodiment of the present invention shown in fig. 2, except that a diffraction suppression display screen 100 ' having a diffraction suppression effect itself is used in the off-screen imaging apparatus 1 '.
Fig. 15 schematically illustrates a diffraction-suppressed display screen 100 'a that can be used for the under-screen image pickup apparatus 1'. As shown in fig. 15, a diffraction-suppressed display screen 100 ' a has substantially the same configuration as the display screen 10, including the pixel layers 11 having the same structure, except that a diffraction-suppressed optical member 20 ' is integrated in the diffraction-suppressed display screen 100 ' a. The diffraction suppressing optical member 20' has the structure described above in connection with fig. 5 to 13, and is disposed such that the second region therein corresponds to the light-shielding band in the pixel layer of the display screen. The diffraction suppressing optical member 20' may be formed separately and interposed 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 illustrates a diffraction-suppressing display screen 100 'B that can be used for the under-screen image pickup device 1'. The pixel layer 11 'of the diffraction suppression display screen 100' B includes 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 shape resulting from random misalignment in a lateral direction perpendicular to an extending direction of the stripe shape of a plurality of unit patterns arranged along the extending direction. In other words, the light-shielding zone in the pixel layer 11 'of the diffraction-inhibiting display screen 100' B has the configuration of the second region in the diffraction-inhibiting optical member according to the embodiment of the present invention.
Fig. 17 shows an example of the pixel layer 11 ' in which the light-shielding tape 11 ' B arranged around the pixel cell 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 suppression optical component, such as described above in conjunction with fig. 5-12, and will not be described again here.
It can be seen that such a diffraction-suppressed display panel according to an embodiment of the present invention 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 being in a stripe shape, wherein at least a partial region of the pixel layer, the light-shielding tape has a plurality of unit patterns arranged along an extending direction of the stripe shape, the plurality of unit patterns extending from an edge position of the light-shielding tape in a lateral direction perpendicular to the extending direction toward the pixel cells, the plurality of unit patterns having different lengths in the lateral direction so as to form random dislocations in the lateral direction.
For example, the unit pattern may be in the shape of a rectangle or a line segment. Preferably, the lengths of the unit patterns are equal to or greater than lminAnd is less than or equal to lmaxOf where l isminIs the minimum length of the plurality of unit patterns,/maxIs the maximum length of the plurality of unit patterns.
Fig. 18 is a simulation data chart of a specific example of applying the diffraction suppressing optical member according to the present invention. In this specific example, the diffraction suppressing optical member has "random burrs" as shown in fig. 8, which are structured in the manner shown in fig. 9, in which the length l of the unit pattern constituting the "random burrs" is 28 μm and the width τ is 1 μm; the pixel layer in the display screen 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 tape is 20 μm. The diffraction suppression simulation result based on this specific example is shown in fig. 18. The upper part of fig. 18 shows simulation data, the lower part shows a graph corresponding to the simulation data, in which the abscissa indicates the position of the diffraction order, the ordinate indicates the amplitude of the diffraction order, the solid line indicates the amplitude ratio before modulation, and the dashed dotted line indicates the amplitude ratio after continuous amplitude modulation. As can be seen from the figure, the diffraction-inhibiting optical member of the present invention has an excellent effect of inhibiting diffraction orders of three or more orders, and thus has a reduced starburst effect as a whole.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (16)
1. A diffraction suppressing optical member formed as a sheet member including a first region and a second region arranged two-dimensionally and periodically, the first region being a light transmitting region, wherein the second region has a shape resulting from random misalignment in a lateral direction perpendicular to an extending direction of an edge thereof of a plurality of unit patterns arrayed along the extending direction, and the second region is light opaque.
2. The diffraction-inhibiting optical component of claim 1, wherein the plurality of unit patterns have similar shapes.
3. The diffraction suppressing optical member 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. The diffraction-suppressing optical component according to claim 3, wherein a direction of the diagonal line of the parallel hexagon is perpendicular to an extending direction of an edge of the second region.
5. The diffraction-suppressing optical member as claimed in claim 4, wherein the length of the short side of said parallel hexagon is a, the length of said diagonal line is d, and d ═ 5a is satisfied.
6. The diffraction-suppressing optical component of claim 4, wherein a plurality of the parallel hexagons are randomly biased in a direction transverse to the edge of the second region and satisfy the following probability distribution function:
where ξ is the offset distance of the parallel hexagon in the lateral direction of the edge of the second region, d is the length of the diagonal of the parallel hexagon.
7. The diffraction suppressing optical member as claimed in claim 1, wherein the unit pattern is in a rectangular or line shape, and a longitudinal direction of the unit pattern is perpendicular to an extending direction of an edge of the second region, and an aspect ratio of the unit pattern is 2 or more, preferably 5 or more.
8. The diffraction-suppressing optical member as claimed in claim 7, wherein the plurality of unit patterns have the same length l and width τ, the plurality of unit patterns are randomly biased in a direction transverse to the edge of the second region, and the random bias satisfies a probability distribution function of:
where ξ is the offset distance of the unit figure in the lateral direction of the edge of the second region.
9. The diffraction-inhibiting optical component of claim 7, wherein the plurality of cellsThe graphics have different lengths, and the lengths of the unit graphics are more than or equal to lminAnd is less than or equal to lmaxOf where l isminIs the minimum length of a plurality of unit patterns,/maxIs the maximum length of the plurality of unit patterns.
10. The diffraction-suppressing optical member as claimed in claim 9, wherein the center positions of the plurality of unit patterns are randomly offset in a direction transverse to the edge of the second region.
11. A diffraction suppression optical member formed as a sheet member including a first region and a second region arranged two-dimensionally and periodically, the second region including a central region and a transition region at an edge of the central region, the first region being a light-transmitting region, the transition region being a light-non-transmitting region, wherein the transition region has a plurality of unit patterns arranged along an extending direction of the edge of the central region, the plurality of unit patterns extending from an edge position of the central region in a lateral direction perpendicular to the extending direction toward the first region, the plurality of unit patterns having different lengths in the lateral direction so as to form random misalignment in the lateral direction.
12. The diffraction suppressing optical member as claimed in claim 11, wherein the unit patterns have a rectangular or line-segment shape, and the length of the plurality of unit patterns in the transverse direction is l or moreminAnd is less than or equal to lmaxOf where l isminIs the minimum length of the plurality of unit patterns,/maxIs the maximum length of the plurality of unit patterns.
13. The diffraction-inhibiting optical component of any one of claims 1-12, wherein the second region is opaque throughout.
14. The diffraction-inhibiting optical component of any one of claims 1-12, wherein the sheet comprises a transparent substrate and an opaque cover layer formed on the transparent substrate.
15. The diffraction-suppressing optical component of any one of claims 1 to 12, wherein the sheet member is made of an opaque base material and is formed with an engraved portion.
16. The diffraction suppressing optical component according to any one of claims 1 to 12, wherein the sheet member is formed by laminating 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 direction and the second direction intersecting each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110418295.4A CN113156655B (en) | 2020-01-14 | 2020-01-14 | Electronic device for under-screen camera shooting |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110418295.4A CN113156655B (en) | 2020-01-14 | 2020-01-14 | Electronic device for under-screen camera shooting |
| CN202010035985.7A CN111208648B (en) | 2020-01-14 | 2020-01-14 | Diffraction-suppressing optical member, diffraction-suppressing display panel, and under-panel imaging device |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010035985.7A Division CN111208648B (en) | 2020-01-14 | 2020-01-14 | Diffraction-suppressing optical member, diffraction-suppressing display panel, and under-panel imaging device |
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| Publication Number | Publication Date |
|---|---|
| CN113156655A true CN113156655A (en) | 2021-07-23 |
| CN113156655B CN113156655B (en) | 2023-08-25 |
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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 |
| CN117912368A (en) * | 2020-12-09 | 2024-04-19 | 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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| CN111208648B (en) | 2021-05-07 |
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