CN112817076A - Grating structure and display device - Google Patents
Grating structure and display device Download PDFInfo
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- CN112817076A CN112817076A CN202110161604.4A CN202110161604A CN112817076A CN 112817076 A CN112817076 A CN 112817076A CN 202110161604 A CN202110161604 A CN 202110161604A CN 112817076 A CN112817076 A CN 112817076A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- 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
Abstract
The invention provides a grating structure and a display device, and relates to the technical field of display. Wherein, the grating structure includes: a light-transmitting substrate layer; the first shading layer is arranged on the light-transmitting base material layer and comprises a plurality of parallel first shading areas, and a first opening area is arranged between every two adjacent first shading areas; the second shading layer is arranged on the other side of the light-transmitting base material layer and comprises a plurality of second shading areas which are parallel, and a second opening area is arranged between every two adjacent second shading areas. Wherein, first shading area is parallel with the second shading area, and the projection of first open region on the printing opacity substrate layer overlaps with the projection of second open region on the printing opacity substrate layer at least partially to when light incides with less angle, can incide from first open region, from the outgoing of second open region, and when light incides with great angle, can be sheltered from by the second shading area, thereby end, make the unable light of observing of large visual angle, so, can realize large visual angle peep-proof effect.
Description
Technical Field
The invention relates to the technical field of display, in particular to a grating structure and a display device.
Background
Nowadays, electronic devices such as computers and mobile phones are integrated into the work and life of people, and great convenience is provided for people. However, when people browse information through the screen of the electronic device, the content of the display interface is easily snooped by other people, and especially for some private information, the user of the electronic device does not want to be seen by other people. The existing screen protection film does not have a peep-proof function, so that the confidentiality of screen information is poor.
Disclosure of Invention
The invention provides a grating structure and a display device, which aim to solve the problem of poor confidentiality when information is browsed through a screen.
In order to solve the above problems, the present invention discloses a grating structure, comprising:
a light-transmitting substrate layer;
the first shading layer is arranged on the light-transmitting base material layer and comprises a plurality of first shading areas which are arranged in parallel, and a first opening area is arranged between every two adjacent first shading areas;
the second light shielding layer is arranged on one side, far away from the first light shielding layer, of the light-transmitting base material layer and comprises a plurality of second light shielding areas which are arranged in parallel, and a second opening area is arranged between every two adjacent second light shielding areas;
the first light-shielding region is parallel to the second light-shielding region, and the projection of the first opening region on the light-transmitting substrate layer is at least partially overlapped with the projection of the second opening region on the light-transmitting substrate layer.
Optionally, one side of the first light shielding layer, which is far away from the light-transmitting substrate layer, is provided with a reflecting surface.
Optionally, one side of the second light shielding layer close to the light-transmitting substrate layer has a light absorbing surface.
Optionally, the width of the first opening region in a first direction is related to the thickness of the light-transmitting substrate layer in a second direction, and the width of the first light-shielding region in the first direction is related to the thickness of the light-transmitting substrate layer in the second direction; the first direction is parallel to the light-transmitting base material layer and perpendicular to the direction of the first light-shielding region, and the second direction is perpendicular to the direction of the light-transmitting base material layer.
Optionally, the width of the second opening region in the third direction is related to the thickness of the light-transmitting substrate layer in the second direction, and the width of the second light-shielding region in the third direction is related to the thickness of the light-transmitting substrate layer in the second direction; the third direction is parallel to the light-transmitting substrate layer and perpendicular to the direction of the second light-shielding region, and the second direction is perpendicular to the direction of the light-transmitting substrate layer.
Optionally, in a direction perpendicular to the light-transmitting substrate layer, the thickness of the first light-shielding layer is greater than or equal to 0.3 micrometers and less than or equal to 1 micrometer, and the thickness of the second light-shielding layer is greater than or equal to 1 micrometer and less than or equal to 2 micrometers.
In order to solve the above problem, the invention also discloses a display device comprising the above grating structure.
Optionally, the grating structure is disposed on a light exit side of the display device.
Optionally, one side of the first light shielding layer, which is far away from the light-transmitting substrate layer, has a reflective surface, and the first light shielding layer is disposed close to the display device.
Optionally, the display device includes a display panel and a backlight module, and the grating structure is disposed between the display panel and the backlight module.
Optionally, a reflective surface is disposed on a side of the first light shielding layer away from the light-transmissive substrate layer, and the first light shielding layer is disposed close to the backlight module.
Compared with the prior art, the invention has the following advantages:
in the embodiment of the invention, a first light shielding layer and a second light shielding layer are respectively arranged on two sides of the light-transmitting substrate layer, a plurality of first light shielding areas of the first light shielding layer are parallel to each other, a first opening area is arranged between adjacent first light shielding areas, a plurality of second light shielding areas of the second light shielding layer are parallel to each other, and a first opening area is arranged between adjacent second light shielding areas, so that a grating structure is formed. Wherein, the projection of first open region on printing opacity substrate layer 10 overlaps with the projection of second open region on the printing opacity substrate layer at least partially, thereby when light incides with less angle, light can be from the incidence of first open region, and from the outgoing of second open region, and when light incides with great angle, light can be from the incidence of first open region, nevertheless can be sheltered from by the second shading area, thereby end, make the unable light of observing of large visual angle, so, can realize the peep-proof effect under the large visual angle, thereby when the screen browsing information through being provided with this grating structure, have higher security.
Drawings
Fig. 1 shows a cross-sectional view of a grating structure according to a first embodiment of the invention;
FIG. 2 shows a top view of a grating structure according to a first embodiment of the present invention;
FIG. 3 shows another top view of a grating structure according to a first embodiment of the present invention;
FIG. 4 is a schematic diagram of a critical ray according to a first embodiment of the present invention;
FIG. 5 is a schematic diagram of another critical ray according to a first embodiment of the present invention;
FIG. 6 is a schematic diagram of an optical path according to a first embodiment of the present invention;
FIG. 7 is a schematic diagram of another optical path according to the first embodiment of the present invention;
FIG. 8 is a schematic diagram of another optical path according to a first embodiment of the present invention;
FIG. 9 is a graph showing the transmittance of a grating structure according to a first embodiment of the present invention;
FIG. 10 is a graph showing the normalized variation of transmittance with incident light angle for a grating structure according to a first embodiment of the present invention;
fig. 11 is a graph showing the transmittance of a grating structure and a 3M privacy film according to a first embodiment of the present invention in comparison with the incident light angle;
fig. 12 is a schematic view showing a display device according to a second embodiment of the present invention;
fig. 13 is a schematic view showing another display device according to the second embodiment of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example one
Fig. 1 shows a cross-sectional view of a grating structure according to a first embodiment of the present invention, fig. 2 shows a top view of the grating structure according to the first embodiment of the present invention, fig. 3 shows another top view of the grating structure according to the first embodiment of the present invention, and referring to fig. 1, the grating structure includes:
a light-transmitting substrate layer 10;
a first light shielding layer 20 provided on the light-transmitting substrate layer 10, the first light shielding layer 20 including a plurality of first light shielding regions 21 provided in parallel with each other, and first opening regions 22 provided between adjacent first light shielding regions 21, as shown in fig. 2;
a second light-shielding layer 30 disposed on a side of the light-transmitting substrate layer 10 away from the first light-shielding layer 20, and referring to fig. 3, the second light-shielding layer 30 includes a plurality of second light-shielding regions 31 disposed in parallel with each other, and a second opening region 32 is disposed between adjacent second light-shielding regions 31;
the first light-shielding region 21 is parallel to the second light-shielding region 31, and a projection of the first opening region 22 on the light-transmitting substrate layer 10 at least partially overlaps a projection of the second opening region 32 on the light-transmitting substrate layer 10.
In the embodiment of the present application, the first light-shielding layer 20 and the second light-shielding layer 30 are respectively disposed on both sides of the light-transmitting substrate layer 10, the first light-shielding regions 21 of the first light-shielding layer 20 are disposed at intervals with respect to the first opening regions 22, and the second light-shielding regions 31 of the second light-shielding layer 30 are disposed at intervals with respect to the first opening regions 22, so as to form a grating structure. Wherein the projection of the first opening region 22 on the light-transmitting substrate layer 10 at least partially overlaps the projection of the second opening region 32 on the light-transmitting substrate layer 10, so that, when light is incident at a small angle, light can be incident from the first open region 22, and exit from the second open region 32, when light is incident at a larger angle, the light can be incident from the first opening region 22, but will be blocked by the second light-blocking region 31, and thus, is blocked from exiting the second open region 32, so that light can be observed from the front of the grating structure, i.e., from a positive viewing angle, and light cannot be observed from the side of the grating structure, namely from a large visual angle, so that light filtering at the large visual angle can be realized, the effect of narrowing the visual angle is achieved, and the peep-proof function at the large visual angle is achieved, therefore, when information is browsed through the screen provided with the grating structure, the high confidentiality is achieved. In specific application, different cut-off angles can be realized by designing the shading width and the opening width of the grating structure, so that peep prevention at different viewing angles can be realized.
Alternatively, referring to fig. 1, the first light shielding layer 20 has a reflective surface 201 on a side away from the light-transmissive substrate layer 10.
In practical applications, the material of the first light shielding layer 20 may be a light reflecting material, such as a metal material, more specifically, aluminum, silver, copper, etc., so that the first light shielding layer 20 has a light reflecting surface while being opaque. Shine to the light that first light shield layer 20 kept away from printing opacity substrate layer 10 one side, can be reflected by the plane of reflection 201 of first light shield layer 20 to return light source department and recycle, so, can improve the utilization ratio of light, make the light transmission under the normal view volume higher.
Alternatively, referring to fig. 1, a side of the second light shielding layer 30 adjacent to the light-transmitting substrate layer 10 has a light absorbing surface 301.
In practical applications, the material of the second light shielding layer 30 may be a light absorbing material, such as a light absorbing resin material for making BM (Black matrix), so that the second light shielding layer 30 has a light absorbing surface while being opaque. Shine to the light that second light shield layer 30 is close to printing opacity substrate layer 10 one side, can be absorbed by the light-absorbing surface 301 of second light shield layer 30, can not the outgoing, so, can avoid light to carry out multiple reflection in printing opacity substrate layer 10 inside back with the wide-angle outgoing, improved the peep-proof effect.
Alternatively, the width of the first opening region 22 in the first direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction, and the width of the first light-shielding region 21 in the first direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction; the first direction is a direction parallel to the light-transmitting substrate layer 10 and perpendicular to the first light-shielding region 21, and the second direction is a direction perpendicular to the light-transmitting substrate layer 10.
Specifically, taking the case that the projection of the first opening region 22 on the light-transmitting substrate layer 10 completely overlaps with the projection of the second opening region 32 on the light-transmitting substrate layer 10 as an example, referring to fig. 4, a schematic diagram of critical rays is shown, if an incident ray is to be made larger than the incident angle α, no ray exits the grating structure, that is, α is designed as a cut-off angle, as shown in fig. 4, the following geometric relationship exists:
S1＝h*tan[arcsin((n1*sinα)/n2)] (1)
wherein S1 is the width of the first opening region 22 in the first direction, symbol x represents a product number, h is the thickness of the light-transmitting substrate layer 10 in the second direction, and n1Is the refractive index of air, n2Is the refractive index of the light-transmitting substrate layer 10. In practical application, n1When the value of (d) is 1 and the light-transmitting substrate layer 10 is a glass material, n is2The value of (d) can be taken to be 1.5, and thus the above geometric relationship can be simplified as follows:
S1＝h*tan[arcsin(sinα/1.5)] (2)
further, if the incident light is larger than the incident angle α, the grating structure does not emit light in the absence of light, and it is also necessary to ensure that the light does not emit from other opening regions farther away, that is, the light is still blocked by the second light-shielding region 31 in the limit of the incident angle of 90 °. Referring to FIG. 5, another diagram of critical rays is shown, as shown in FIG. 5, where the following geometric relationship exists:
W1＝h*tan[arcsin((n1*sin90°)/n2)] (3)
where W1 is the width of the first light-shielding region 21 in the first direction, symbol x represents a multiplier, h is the thickness of the light-transmitting substrate layer 10 in the second direction, and n1Is the refractive index of air, n2Is the refractive index of the light-transmitting substrate layer 10. In practical application, n1When the value of (d) is 1 and the light-transmitting substrate layer 10 is a glass material, n is2The value of (d) can be taken to be 1.5, and thus the above geometric relationship can be simplified as follows:
W1＝h*tan[arcsin(sin90°/1.5)] (4)
as can be seen from the above geometric relational expressions, the width of the first opening region 22 in the first direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction, and the width of the first light-shielding region 21 in the first direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction.
Also optionally, the width of the second opening region 32 in the third direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction, and the width of the second light-shielding region 31 in the third direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction; the third direction is a direction parallel to the light-transmitting substrate layer 10 and perpendicular to the second light-shielding region 31, and the second direction is a direction perpendicular to the light-transmitting substrate layer 10.
For the case where the projection of the first open region 22 on the light-transmissive substrate layer 10 and the projection of the second open region 32 on the light-transmissive substrate layer 10 completely overlap, the above-described geometric relational expressions of the first light-shielding layer 20 can also be applied to the second light-shielding layer 30, and the geometric relational expressions are as follows:
S2＝h*tan[arcsin((n1*sinα)/n2)] (5)
where S2 is the width of the second opening region 32 in the third direction.
The geometrical relation is simplified to obtain:
S2＝h*tan[arcsin(sinα/1.5)] (6)
in addition, the following geometrical relationships are also provided:
W2＝h*tan[arcsin((n1*sin90°)/n2)] (7)
where W2 is the width of the second light-shielding region 31 in the third direction.
The geometrical relation is simplified to obtain:
W2＝h*tan[arcsin(sin90°/1.5)] (8)
as can be seen from the above geometric relational expressions, the width of the second opening region 32 in the third direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction, and the width of the second light-shielding region 31 in the third direction is related to the thickness of the light-transmissive substrate layer 10 in the second direction.
In summary, for a given cut-off angle, different widths of the light-shielding region and the opening region can be calculated according to different thicknesses h of the transparent substrate.
Specifically, taking the cutoff angle α as an example of 40 ° to 50 °, when the thickness h of the transparent base material layer is 200 μm, the width of the first opening region 22 in the first direction is 95 μm to 118 μm according to the above geometric relational expression (2); according to the above geometric relation (6), the width of the second opening region 32 in the third direction is 95 to 118 μm; from the above-described geometric relation (4), it is possible to obtain that the width of the first light-shielding region 21 in the first direction is 178 μm; from the above geometric relation (8), the width of the second light-shielding region 31 in the third direction is 178 μm.
More specifically, taking the cutoff angle α as an example of 45 °, when the light-transmitting substrate layer thickness h is 200 μm, the width of the first opening region 22 in the first direction can be found to be 107 μm according to the above geometric relational expression (2); according to the above geometric relation (6), it can be obtained that the width of the second opening region 32 in the third direction is 107 μm; from the above-described geometric relation (4), it is possible to obtain that the width of the first light-shielding region 21 in the first direction is 178 μm; from the above geometric relation (8), the width of the second light-shielding region 31 in the third direction is 178 μm.
Taking the cutoff angle α as 45 °, when the incident angle β is 0 °, referring to fig. 6, the incident light is partially blocked by the first light-blocking region 21, and the light incident from the first opening region 22 can be emitted from the second opening region 32. When the incident angle β is between 0 ° and 45 °, referring to fig. 7, the incident light is partially blocked by the first light-blocking region 21, the light incident from the first opening region 22 is further partially blocked by the second light-blocking region 31, and a part of the light can be emitted from the second opening region 32. When the incident angle β is between 45 ° and 90 °, referring to fig. 8, the incident light is partially blocked by the first light-blocking region 21, and the light incident from the first opening region 22 is completely blocked by the second light-blocking region 31, and no light is emitted from the second opening region 32.
Since the outgoing light ray is parallel to the incoming light ray, the cut-off angle of the viewing angle is the same as the cut-off angle of the incoming light ray. When the visual angle is larger than the designed cut-off angle, the light rays cannot be observed to be emitted from the grating structure, and therefore the peep-proof effect of a large visual angle is achieved.
For the case where the projection of the first opening region 22 on the light-transmissive substrate layer 10 completely overlaps the projection of the second opening region 32 on the light-transmissive substrate layer 10, that is, the case where S1 is equal to S2 and W1 is equal to W2, when the incident angle is smaller than the cutoff angle, the relationship of the light transmittance Trans with the incident angle β is as follows:
Trans＝(S1-h*tan[arcsin((n1*sinβ)/n2)])/(S1+W1) (9)
in particular, the above relational expression does not take into consideration the reflection action of the first light-shielding layer 20 on light.
In practical application, n1When the value of (d) is 1 and the light-transmitting substrate layer 10 is a glass material, n is2The value of (d) can be taken to be 1.5, and thus the above geometric relationship can be simplified as follows:
Trans＝(S1-h*tan[arcsin(sinβ/1.5)])/(S1+W1) (10)
in addition, in the case where the projection of the first opening region 22 on the light-transmitting substrate layer 10 overlaps the projection of the second opening region 32 on the light-transmitting substrate layer 10, the width of the offset portion of the two projections in the first direction or the third direction, that is, the offset portion of the two projections needs to be considered when designing the cut-off angle in each of the above geometric relational expressions.
Fig. 9 shows the change curves of the transmittance of the grating structure with the cut-off angles of 40 °, 45 ° and 50 ° respectively according to the incident light angle, and the transmittance-angle change curve in fig. 9 is normalized to obtain fig. 10.
Referring to fig. 9 and 10, for the transmittance curve with a cut-off angle of 40 °, when the incident light angle is less than 40 °, the transmittance of the grating structure decreases with the increase of the incident light angle, and when the incident light angle is greater than or equal to 40 °, the transmittance of the grating structure is 0, that is, the peep-proof effect is achieved at the viewing angle of 40 ° or more. Similarly, for a transmittance curve with a cut-off angle of 45 °, when the incident light angle is less than 45 °, the transmittance of the grating structure decreases with increasing incident light angle, and when the incident light angle is greater than or equal to 45 °, the transmittance of the grating structure is 0, i.e., the privacy effect is achieved at viewing angles above 45 °. For the transmittance curve with the cut-off angle of 50 degrees, when the incident light angle is less than 50 degrees, the transmittance of the grating structure is reduced along with the increase of the incident light angle, and when the incident light angle is greater than or equal to 50 degrees, the transmittance of the grating structure is 0, namely, the peep-proof effect is realized at the viewing angle of more than 50 degrees.
Referring to fig. 9 and 10, when the incident Light angle is smaller than the cut-off angle, only a part of the Light exits the second opening region 32, but for an LED (Light Emitting Diode) backlight used in the display industry, the Light with a large viewing angle is generally weak, and therefore, even if the Light exits the second opening region 32, the intensity is weak.
It should be noted that the viewing angle described in the embodiments of the present invention refers to an angle between a line of sight and a direction perpendicular to the light-transmitting substrate layer 10, such as a viewing angle γ shown in fig. 6.
In practical applications, the first light shielding layer 20 may be prepared by a coating process. In practical applications, the second light shielding layer 30 may be prepared by a sputtering process. Still alternatively, in a direction perpendicular to the light-transmitting substrate layer 10, that is, in the second direction, according to an existing coating process, the thickness of the first light shielding layer 20 may be greater than or equal to 0.3 micrometers and less than or equal to 1 micrometer, and according to an existing sputtering process, the thickness of the second light shielding layer 30 may be greater than or equal to 1 micrometer and less than or equal to 2 micrometers.
Alternatively, the light-transmitting substrate layer 10 may be made of a glass material, which is not particularly limited in this embodiment of the present invention.
In an alternative embodiment, the grating structure may comprise a glass substrate, a light-shielding BM resin layer coated on one side of the glass substrate, and a light-shielding metal layer coated on the other side of the glass substrate corresponding to the BM resin layer. BM resin has no reflection effect, and light transmitted to BM areas can be absorbed; the shading metal has a reflection function, and more than 90% of light transmitted to the metal layer can be reflected and recycled. By designing the shading opening widths of the BM resin layer and the shading metal layer, light incident perpendicular to the glass substrate can pass through the opening region by utilizing the refraction effect of glass, the shading effect of the BM resin and the shading and reflecting effect of metal, and the light in the shading region is cut off. The small-angle incident light can be emitted through the opening region, and the large-angle incident light can be cut off. Optionally, the thickness of the glass substrate may be designed to be 0.2mm, the width of the light shielding region may be 178 μ M, and the width of the opening region may be 107 μ M, so that the cut-off angle is 45 °, and the peeping prevention effect of the existing 3M peeping prevention film shown in fig. 11 may be achieved.
According to the specific embodiment, the BM resin layer of shading is plated on one side of the glass substrate, and the shading metal layer is plated on the other side of the glass substrate, so that a grating structure is formed, the shading positions on two sides of the glass substrate can be the same, the shading width and the opening width of the grating are reasonably designed, when a divergent light source (such as an LED backlight) passes through the grating structure, the light at a large visual angle can be filtered, and the light at a positive visual angle passes through the grating structure, so that the peeping prevention effect is realized.
The grating structure provided by the embodiment of the invention can be used for various display products, such as bank teller machines, high-end peep-proof notebook computers, monitors, vehicle-mounted display screens and the like, and can solve the problem of information leakage caused by the display products. In addition, when the vehicle-mounted display screen is used for the vehicle-mounted display screen, the vehicle-mounted display screen not only has an anti-peeping effect, but also can prevent the vehicle-mounted display screen picture from forming shadows on the windshield to influence safe driving at night by shielding light rays with large visual angles.
In the embodiment of the invention, a first light shielding layer and a second light shielding layer are respectively arranged on two sides of the light-transmitting substrate layer, a plurality of first light shielding areas of the first light shielding layer are parallel to each other, a first opening area is arranged between adjacent first light shielding areas, a plurality of second light shielding areas of the second light shielding layer are parallel to each other, and a first opening area is arranged between adjacent second light shielding areas, so that a grating structure is formed. Wherein, the projection of first open region on printing opacity substrate layer 10 overlaps with the projection of second open region on the printing opacity substrate layer at least partially, thereby when light incides with less angle, light can be from the incidence of first open region, and from the outgoing of second open region, and when light incides with great angle, light can be from the incidence of first open region, nevertheless can be sheltered from by the second shading area, thereby end, make the unable light of observing of large visual angle, so, can realize the peep-proof effect under the large visual angle, thereby when the screen browsing information through being provided with this grating structure, have higher security.
Example two
The invention also discloses a display device which comprises the grating structure.
Fig. 12 is a schematic diagram of a display device according to a second embodiment of the present invention.
Alternatively, referring to fig. 12, the grating structure 100 may be disposed at the light exit side a of the display device 200.
Still alternatively, referring to fig. 12, in the case where the first light shielding layer 20 has a reflective surface 201 on a side away from the light-transmitting substrate layer 10, the first light shielding layer 20 may be disposed close to the display device 200.
In practical applications, the grating structure 100 may be attached to the surface of the display device 200, specifically, a frame attachment manner may be adopted, that is, the grating structure 100 and the surface of the display device 200 are attached through a circle of adhesive layer, and of course, under the condition that the light transmittance of the adhesive layer is relatively high, a full attachment manner may also be adopted, that is, the adhesive layer is fully coated between the grating structure 100 and the display device 200.
Fig. 13 is a schematic view showing another display device according to the second embodiment of the present invention.
Alternatively, referring to fig. 13, the display device 200 includes a display panel 2001 and a backlight module 2002, and the grating structure 100 is disposed between the display panel 2001 and the backlight module 2002.
Alternatively, in the case where the first light shielding layer 20 has the reflective surface 201 on the side away from the light-transmissive substrate layer 10, the first light shielding layer 20 is disposed close to the backlight module 2002.
In practical applications, the grating structure 100 may also be placed between the display panel 2001 and the backlight module 2002, and specifically, a frame pasting manner may be adopted, that is, the grating structure 100 and the display device 200 are pasted through a circle of glue layer, so as to avoid affecting the film material effect of the backlight module 2002, and of course, under the condition that the light transmittance of the glue layer is higher, a full pasting manner may also be adopted, that is, the glue layer is fully coated between the grating structure 100 and the display device 200.
In the embodiment of the invention, in the grating structure of the display device, a first light shielding layer and a second light shielding layer are respectively arranged on two sides of a light-transmitting substrate layer, a plurality of first light shielding areas of the first light shielding layer are parallel to each other, a first opening area is arranged between adjacent first light shielding areas, a plurality of second light shielding areas of the second light shielding layer are parallel to each other, and a first opening area is arranged between adjacent second light shielding areas, so that the grating structure is formed. Wherein, the projection of first open region on printing opacity substrate layer 10 overlaps with the projection of second open region on the printing opacity substrate layer at least partially, thereby when light incides with less angle, light can be from the incidence of first open region, and from the outgoing of second open region, and when light incides with great angle, light can be from the incidence of first open region, nevertheless can be sheltered from by the second shading area, thereby end, make the unable light of observing of large visual angle, so, can realize the peep-proof effect under the large visual angle, thereby when the screen browsing information through being provided with this grating structure, have higher security.
While, for purposes of simplicity of explanation, the foregoing method embodiments have been described as a series of acts or combination of acts, it will be appreciated by those skilled in the art that the present invention is not limited by the illustrated ordering of acts, as some steps may occur in other orders or concurrently with other steps in accordance with the invention. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and modules referred to are not necessarily required by the invention.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The grating structure and the display device provided by the invention are described in detail above, and a specific example is applied in the text to explain the principle and the implementation of the invention, and the description of the above embodiment is only used to help understanding the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (11)
1. A grating structure, comprising:
a light-transmitting substrate layer;
the first shading layer is arranged on the light-transmitting base material layer and comprises a plurality of first shading areas which are arranged in parallel, and a first opening area is arranged between every two adjacent first shading areas;
the second light shielding layer is arranged on one side, far away from the first light shielding layer, of the light-transmitting base material layer and comprises a plurality of second light shielding areas which are arranged in parallel, and a second opening area is arranged between every two adjacent second light shielding areas;
the first light-shielding region is parallel to the second light-shielding region, and the projection of the first opening region on the light-transmitting substrate layer is at least partially overlapped with the projection of the second opening region on the light-transmitting substrate layer.
2. The grating structure of claim 1, wherein the first light shielding layer has a reflective surface on a side thereof away from the light-transmissive substrate layer.
3. The grating structure of claim 1, wherein the second light shielding layer has a light absorbing surface on a side thereof adjacent to the light-transmissive substrate layer.
4. The grating structure of claim 1, wherein a width of the first open region in a first direction is related to a thickness of the light-transmissive substrate layer in a second direction, and a width of the first light-shielding region in the first direction is related to the thickness of the light-transmissive substrate layer in the second direction; the first direction is parallel to the light-transmitting base material layer and perpendicular to the direction of the first light-shielding region, and the second direction is perpendicular to the direction of the light-transmitting base material layer.
5. The grating structure of claim 1, wherein a width of the second open region in a third direction is related to a thickness of the light-transmissive substrate layer in a second direction, and a width of the second light-shielding region in the third direction is related to the thickness of the light-transmissive substrate layer in the second direction; the third direction is parallel to the light-transmitting substrate layer and perpendicular to the direction of the second light-shielding region, and the second direction is perpendicular to the direction of the light-transmitting substrate layer.
6. The grating structure of claim 1, wherein the first light shielding layer has a thickness greater than or equal to 0.3 micrometers and less than or equal to 1 micrometer, and the second light shielding layer has a thickness greater than or equal to 1 micrometer and less than or equal to 2 micrometers in a direction perpendicular to the light-transmissive substrate layer.
7. A display device comprising a grating structure according to any one of claims 1 to 6.
8. A display device as claimed in claim 7, characterized in that the grating structure is arranged at the light exit side of the display device.
9. The display device according to claim 8, wherein a side of the first light-shielding layer remote from the light-transmitting substrate layer has a reflective surface, and wherein the first light-shielding layer is provided close to the display device.
10. The display device according to claim 7, wherein the display device comprises a display panel and a backlight module, and the grating structure is disposed between the display panel and the backlight module.
11. The display device according to claim 10, wherein a reflective surface is provided on a side of the first light-shielding layer away from the light-transmissive substrate layer, and wherein the first light-shielding layer is disposed close to the backlight module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110161604.4A CN112817076A (en) | 2021-02-05 | 2021-02-05 | Grating structure and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110161604.4A CN112817076A (en) | 2021-02-05 | 2021-02-05 | Grating structure and display device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141143A (en) * | 2021-11-24 | 2022-03-04 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and mobile terminal |
| CN114167603A (en) * | 2021-07-19 | 2022-03-11 | 友达光电股份有限公司 | Light control structure |
| CN114326199A (en) * | 2021-12-31 | 2022-04-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN114360379A (en) * | 2021-12-31 | 2022-04-15 | 厦门天马微电子有限公司 | Display panel and display device |
-
2021
- 2021-02-05 CN CN202110161604.4A patent/CN112817076A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114167603A (en) * | 2021-07-19 | 2022-03-11 | 友达光电股份有限公司 | Light control structure |
| CN114141143A (en) * | 2021-11-24 | 2022-03-04 | 武汉华星光电半导体显示技术有限公司 | Display panel, preparation method thereof and mobile terminal |
| CN114326199A (en) * | 2021-12-31 | 2022-04-12 | 厦门天马微电子有限公司 | Display panel and display device |
| CN114360379A (en) * | 2021-12-31 | 2022-04-15 | 厦门天马微电子有限公司 | Display panel and display device |
| CN114360379B (en) * | 2021-12-31 | 2023-11-21 | 厦门天马微电子有限公司 | Display panel and display device |
| CN114326199B (en) * | 2021-12-31 | 2024-04-02 | 厦门天马微电子有限公司 | Display panel and display device |
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