CN112965228A - Peep-proof film, display panel and display device - Google Patents

Abstract

Translated fromChinese

本发明涉及显示技术领域，公开了一种防窥膜、显示面板及显示装置，该防窥膜包括复合微结构层，复合微结构层包括光栅结构，光栅结构包括多个出光通道，出光通道周侧具有相对设置的第一内壁和第二内壁；第一内壁朝向第二内壁具有多个第一微结构凸起，第二内壁朝向第一内壁具有多个第二微结构凸起，第一微结构凸起具有朝向出光通道的入光侧的第一反射斜面，第二微结构凸起具有背离出光通道的入光侧且与第一反射斜面相对的第二反射斜面；相对于垂直于出光通道的轴心线的平面，第一反射斜面与平面的夹角大于第二反射斜面与平面的夹角。该防窥膜可以起到良好的防窥作用，且有效提高光利用率，提高出光率，提升显示亮度。

The invention relates to the technical field of display, and discloses a privacy protection film, a display panel and a display device. The privacy protection film includes a composite microstructure layer, the composite microstructure layer includes a grating structure, and the grating structure includes a plurality of light exit channels. The side has a first inner wall and a second inner wall oppositely arranged; the first inner wall has a plurality of first microstructure protrusions toward the second inner wall, the second inner wall has a plurality of second microstructure protrusions toward the first inner wall, and the first microstructure protrusions The structure protrusion has a first reflection slope facing the light incident side of the light exit channel, and the second microstructure protrusion has a second reflection slope facing away from the light entrance side of the light exit channel and opposite to the first reflection slope; The plane of the axis line, the angle between the first reflection slope and the plane is greater than the angle between the second reflection slope and the plane. The anti-peep film can play a good anti-peep function, and can effectively improve the utilization rate of light, improve the light output rate, and improve the display brightness.

Description

Peep-proof film, display panel and display device

Technical Field

The invention relates to the technical field of display, in particular to a peep-proof film, a display panel and a display device.

Background

The existing peep-proof display product adopts substances capable of blocking light rays, such as a nanoscale black grating and the like to limit the emission angle of the light rays, but for the existing peep-proof film material, the light emitted from a backlight source can be divided into two parts, one part is emitted to the surface of a module, namely the visible part of human eyes, and the other part is absorbed by the substances with the peep-proof function in the peep-proof film material, so that the brightness of the module is reduced by about 40% by the existing peep-proof means due to the loss of the reflected and absorbed light rays, and the customer requirements cannot be met.

Disclosure of Invention

The invention discloses a peep-proof film, a display panel and a display device.

In order to achieve the purpose, the invention provides the following technical scheme:

a privacy film comprising:

the composite microstructure layer comprises a grating structure, the grating structure comprises a plurality of first gratings which are sequentially arranged, a light-emitting channel corresponding to the sub-pixels in the row direction of the display panel is formed between every two adjacent first gratings, and the peripheral side of the light-emitting channel is provided with a first inner wall and a second inner wall which are oppositely arranged; the first inner wall is provided with a plurality of first microstructure bulges which are arranged along the extension direction of the axial lead of the light outlet channel towards the second inner wall, the second inner wall is provided with a plurality of second microstructure bulges which are arranged along the extension direction of the axial lead of the light outlet channel towards the first inner wall, the first microstructure bulges are provided with first reflection inclined planes which are arranged towards the light inlet side of the light outlet channel, the second microstructure bulges are provided with second reflection inclined planes which are deviated from the light inlet side of the light outlet channel and are opposite to the first reflection inclined planes, and the second reflection inclined planes are matched with the first reflection inclined planes and form a light reflection channel so as to enable light to be emitted;

and relative to a plane perpendicular to the axial lead of the light outlet channel, the included angle between the first reflection inclined plane and the plane is larger than the included angle between the second reflection inclined plane and the plane.

The peep-proof film comprises a composite microstructure layer, the composite microstructure layer comprises a grating structure, the grating structure comprises a plurality of first gratings which are sequentially arranged, light-emitting channels which correspond to sub-pixels in the row direction of a display panel one by one are formed between every two adjacent first gratings, a first inner wall and a second inner wall which are oppositely arranged are arranged on the peripheral side of each light-emitting channel, a plurality of first microstructure bulges which are arranged along the extending direction of the axial lead of the light-emitting channels are arranged on the surface of the first inner wall, the first microstructure bulges can be in a strip shape, the first microstructure bulges can extend along the direction which is parallel to the light-in surface of the grating structure and vertical to the light-emitting channels, and the first microstructure bulges are provided with first reflecting inclined surfaces facing the light-in side of the light-emitting channels; the surface of the second inner wall is provided with a plurality of second microstructure bulges arranged along the extension direction of the axial lead of the light-emitting channel, the first microstructure bulges are micron-sized bulges, the second microstructure bulges can be strip-shaped, the second microstructure bulges can extend along the direction parallel to the light-in surface of the grating structure and vertical to the light-emitting channel, the second microstructure bulges are provided with second reflection inclined planes deviating from the light-in side of the light-emitting channel, the second microstructure bulges are micron-sized bulges, the second reflection inclined planes face the light-emitting side of the light-emitting channel and are opposite to the first reflection inclined planes, the first reflection inclined planes and the second reflection inclined planes are matched, light entering from the light-in side can be emitted after being reflected by the first reflection inclined planes and the second reflection inclined planes, the light utilization rate is improved, the light-emitting rate is improved, the display brightness of the display panel can be effectively improved, and relative to a plane vertical to the light, the included angle between the first reflection inclined plane and the plane is larger than the included angle between the second reflection inclined plane and the plane, so that the angle of emergent light is reduced, and the peep-proof effect is achieved.

The included angle between the first reflection inclined plane and the plane is an angle formed between the first reflection inclined plane and the plane, which is smaller than or equal to 90 °; the included angle between the second reflecting inclined plane and the plane is an angle which is formed between the second reflecting inclined plane and the plane and is less than or equal to 90 degrees.

Therefore, in the peep-proof film, the light reflection channel is formed by utilizing the matching reflection of the first reflection inclined plane and the second reflection inclined plane, so that a good peep-proof effect can be achieved, the light utilization rate can be effectively improved, the light extraction rate is improved, and the display brightness is improved.

Optionally, the grating structure further includes a plurality of second gratings arranged in sequence, the second gratings intersect with the first gratings, and sub light-emitting channels corresponding to sub pixels of the display panel one to one are formed between the second gratings and the first gratings; the peripheral side of the sub light-emitting channel further comprises a third inner wall and a fourth inner wall which are oppositely arranged, the third inner wall faces the surface of the fourth inner wall and the first inner wall faces the surface of the second inner wall has the same structure, and the fourth inner wall faces the surface of the third inner wall and the second inner wall faces the surface of the first inner wall has the same structure.

Optionally, a first total reflection layer is formed on a surface of the first reflection inclined plane.

Optionally, a second total reflection layer is formed on a surface of the second reflection inclined plane.

Optionally, an included angle between the first reflection inclined plane and the plane is greater than or equal to 30 ° and less than or equal to 80 °.

Optionally, an included angle between the second reflection inclined plane and the plane is greater than or equal to 20 ° and less than or equal to 80 °.

Optionally, the material of the first total reflection layer comprises a reflective metal material; and/or the material of the second total reflection layer comprises a reflective metal material.

Optionally, the privacy film further comprises a reverse prism layer disposed on the light exit side of the composite microstructure layer.

The invention also provides a display panel which comprises any one of the peep-proof films provided by the technical scheme.

The invention also provides a display device which comprises any one display panel provided by the technical scheme.

Drawings

Fig. 1 is a schematic structural diagram of a peep-proof membrane according to an embodiment of the present invention;

fig. 2 is a schematic partial structure diagram of a composite microstructure layer according to an embodiment of the present invention;

fig. 3 is a schematic diagram of light reflection of a first reflection slope and a second reflection slope in a composite microstructure layer according to an embodiment of the present invention;

icon: 1-a composite microstructure layer; 2-an inverse prism layer; 11-a grating structure; 12-a light-emitting channel; 13-a first inner wall; 13-a second inner wall; 131-first microstructure protrusions; 141-second microstructure projections; 1311 — a first reflective slope; 1411-second reflective slope.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, 2, and 3, an embodiment of the present invention provides a privacy film, including: the display panel comprises a composite microstructure layer 1, wherein the composite microstructure layer 1 comprises agrating structure 11, thegrating structure 11 comprises a plurality of first gratings which are sequentially arranged, a light-emittingchannel 12 corresponding to a sub-pixel in the row direction of the display panel is formed between every two adjacent first gratings, and the periphery of the light-emittingchannel 12 is provided with a firstinner wall 13 and a secondinner wall 14 which are oppositely arranged; the firstinner wall 13 has a plurality offirst microstructure protrusions 131 arranged along the extending direction of the axis of the light-emittingchannel 12 towards the secondinner wall 14, the secondinner wall 14 has a plurality offirst microstructure protrusions 141 arranged along the extending direction of the axis of the light-emittingchannel 12 towards the firstinner wall 13, thefirst microstructure protrusions 131 have a first reflectioninclined plane 1311 facing the light-incident side of the light-emittingchannel 12, thefirst microstructure protrusions 141 have a second reflectioninclined plane 1411 facing the light-incident side of the light-emittingchannel 12 and opposite to the first reflectioninclined plane 1311, and the second reflectioninclined plane 1411 is matched with the first reflectioninclined plane 1311 to form a light reflection channel so as to emit light; relative to a plane perpendicular to the axis of the light-emittingchannel 12, the included angle between the first reflectinginclined plane 1311 and the plane is larger than the included angle between the second reflectinginclined plane 1411 and the plane.

The peep-proof film comprises a composite microstructure layer 1, wherein the composite microstructure layer 1 comprises agrating structure 11, thegrating structure 11 comprises a plurality of first gratings which are sequentially arranged, light-emitting channels 12 which correspond to sub-pixels in the row direction of a display panel one by one are formed between every two adjacent first gratings, a firstinner wall 13 and a secondinner wall 14 which are oppositely arranged are arranged on the peripheral side of each light-emittingchannel 12, a plurality offirst microstructure protrusions 131 which are arranged along the extension direction of the axial lead of the light-emitting channels 12 are arranged on the surface of the firstinner wall 13, thefirst microstructure protrusions 131 can be in a strip shape, thefirst microstructure protrusions 131 can extend along the direction which is parallel to the light-in surface of thegrating structure 11 and is vertical to the light-emitting channels 12, and thefirst microstructure protrusions 131 are provided with first reflectioninclined surfaces 1311 which face the light-in side of the light-emitting channels 12; the surface of the secondinner wall 14 is provided with a plurality offirst microstructure protrusions 141 arranged along the extending direction of the axial lead of the light-emittingchannel 12, thefirst microstructure protrusions 131 are micron-sized protrusions, thefirst microstructure protrusions 141 may be strip-shaped, and thefirst microstructure protrusions 141 may extend along the direction parallel to the light-incident surface of thegrating structure 11 and perpendicular to the light-emittingchannel 12, thefirst microstructure protrusions 141 have a second reflectioninclined surface 1411 deviating from the light-incident side of the light-emittingchannel 12, thefirst microstructure protrusions 141 are micron-sized protrusions, the second reflectioninclined surface 1411 faces the light-emitting side of the light-emittingchannel 12 and is opposite to the first reflectioninclined surface 1311, the first reflectioninclined surface 1311 and the second reflectioninclined surface 1411 are matched to enable light entering from the light-incident side to be emitted after being reflected by the first reflectioninclined surface 1311 and the second reflectioninclined surface 1411, so as to improve the light utilization rate, improve the light-emitting rate, and effectively improve the display brightness of the, moreover, relative to the plane perpendicular to thelight exit channel 12, the included angle a between the first reflectioninclined plane 1311 and the plane is greater than the included angle b between the second reflectioninclined plane 1411 and the plane, so that when light exits, as shown in fig. 3, α is the included angle between the incident light in the incident grating structure and the normal of the first reflection inclined plane, β is the included angle between the exiting light in the exiting grating structure and the normal of the second reflection inclined plane, and the first reflection inclined plane and the second reflection inclined plane are matched with each other, so that the angle when light exits can be reduced, thereby reducing the angle when light exits, and playing a role of peeping prevention.

The angle between the first reflectinginclined plane 1311 and the plane is an angle formed by the first reflectinginclined plane 1311 and the plane, which is not more than 90 °; the angle between the second reflectingslope 1411 and the plane is an angle formed between the second reflectingslope 1411 and the plane, which is 90 ° or less.

Therefore, in the privacy film, the light reflection channel is formed by the cooperative reflection of thefirst reflection slope 1311 and thesecond reflection slope 1411, so that a good privacy effect can be achieved, the light utilization rate can be effectively improved, the light extraction rate can be improved, and the display brightness can be improved.

Specifically, the grating structure further comprises a plurality of second gratings which are sequentially arranged, the second gratings are intersected with the first gratings, and sub light-emitting channels which are in one-to-one correspondence with sub pixels of the display panel are formed between the second gratings and the first gratings; the peripheral sides of the sub light-emitting channels further comprise a third inner wall and a fourth inner wall which are oppositely arranged, the surface of the third inner wall facing the fourth inner wall is the same as the surface of the first inner wall facing the second inner wall in structure, and the surface of the fourth inner wall facing the third inner wall is the same as the surface of the second inner wall facing the first inner wall in structure. Specifically, the sub-pixels are rectangular, the sub-light-emitting channels formed may be rectangular, four side walls surrounding the side of the sub-light-emitting channels are provided, and two pairs of opposing inner walls, one pair of inner walls extending in the row direction is formed by a first grating and is a first inner wall and a second inner wall, and inner walls extending in the column direction are formed by a second grating and are a third inner wall and a fourth inner wall, wherein the structure of the surface of the third inner wall is the same as that of the surface of the first inner wall, the structure of the surface of the fourth inner wall is the same as that of the surface of the second inner wall, the third inner wall is provided with a first microstructure protrusion, the third inner wall is provided with a first reflection slope facing the light-entering side of the sub-light-emitting channels, the fourth inner wall is provided with a second microstructure protrusion, the fourth inner wall is provided with a second reflection slope facing away from the light-entering side of the light-emitting channels and opposite to the first reflection slope on the third inner wall, the third inner wall and the fourth inner wall can be matched with each other to achieve a peep-proof effect, the light utilization rate and the light emergence rate are improved, and the peep-proof direction of the display panel is increased.

Specifically, in the privacy film, the first total reflection layer is formed on the surface of the first reflectioninclined plane 1311, and the first total reflection layer is disposed on the surface of the first reflection inclinedplane 1311, so that the light reflection efficiency can be improved, the light utilization rate can be further improved, and the light extraction rate can be improved. Specifically, a film layer may be additionally disposed on the surface of the first reflectioninclined plane 1311 to form the first total reflection layer, or the surface of the first reflectioninclined plane 1311 may be directly prepared to form a total reflection surface, so that the surface portion of the first reflectioninclined plane 1311 forms the first total reflection layer; the formation of the first total reflection layer may be specifically set according to actual requirements, and this embodiment is not limited.

Specifically, in the privacy film, a second total reflection layer is formed on the surface of thesecond reflection slope 1411. The second total reflection layer is disposed on the surface of the second reflectioninclined plane 1411, so that the light reflection efficiency can be improved, the light utilization rate can be further improved, and the light extraction rate can be improved. Specifically, a film layer may be additionally disposed on the surface of the second reflectiveinclined plane 1411 to form the second total reflection layer, or the surface of the second reflectiveinclined plane 1411 may be directly prepared to form a total reflection surface, so that the surface portion of the second reflectiveinclined plane 1411 forms the second total reflection layer; the formation of the second total reflection layer may be specifically set according to actual requirements, and this embodiment is not limited.

Specifically, in the privacy film, an included angle between the first reflectioninclined plane 1311 and the plane is greater than or equal to 30 ° and less than or equal to 80 °; the included angle between the second reflectinginclined plane 1411 and the plane is greater than or equal to 20 degrees and less than or equal to 80 degrees. The inclined angles of the first reflectinginclined plane 1311 and the second reflectinginclined plane 1411 are selected in a proper range, so that the light utilization rate can be better improved, and the light extraction efficiency is improved; specifically, the included angle of the first reflectioninclined plane 1311 and the plane may be set to be 40 °, 45 °, 50 °, 55 °, or 60 °; the included angle between the second reflectioninclined plane 1411 and the plane is set to be 35 °, 40 °, 45 °, 50 ° or 55 °, and as long as the included angle between the first reflectioninclined plane 1311 and the plane is greater than the included angle between the second reflectioninclined plane 1411 and the plane, the matching of the included angle between the first reflectioninclined plane 1311 and the plane and the included angle between the second reflectioninclined plane 1411 and the plane may be set according to requirements, which is not limited in this embodiment.

Specifically, in the privacy film, the material of the first total reflection layer includes a reflective metal material; and/or the material of the second total reflection layer includes a reflective metal material, and the material of the first total reflection layer and the material of the second total reflection layer may also be other total reflection materials, which is not limited in this embodiment.

Specifically, the peep-proof film further comprises areverse prism layer 2 arranged on the light-emitting side of the composite microstructure layer 1. The surface of the light-emitting side of the composite microstructure layer 1 is provided with theinverse prism layer 2 which can be matched with the composite microstructure layer 1, so that better light-emitting effect is achieved, and the peep-proof effect is improved.

The invention also provides a display panel which comprises any one of the peep-proof films provided by the embodiments. The peep-proof film is attached to the light-emitting surface of the display panel, so that a good peep-proof effect can be achieved, the peep-proof film has a high light utilization rate, the light-emitting rate is improved, and the display brightness is favorably improved.

The invention also provides a display device which comprises any one of the display panels provided in the above embodiments.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (10)

Translated fromChinese

1.一种防窥膜，其特征在于，包括：1. a privacy film, is characterized in that, comprises:复合微结构层，所述复合微结构层包括光栅结构，所述光栅结构包括多个依次排列的第一光栅，每相邻的两个所述第一光栅之间形成用于与显示面板的行方向的子像素对应的出光通道，所述出光通道周侧具有相对设置的第一内壁和第二内壁；所述第一内壁朝向所述第二内壁具有多个沿出光通道的轴心线延伸方向排列的第一微结构凸起，所述第二内壁朝向所述第一内壁具有多个沿出光通道的轴心线延伸方向排列的第二微结构凸起，所述第一微结构凸起具有朝向所述出光通道的入光侧的第一反射斜面，所述第二微结构凸起具有背离所述出光通道的入光侧且与所述第一反射斜面相对的第二反射斜面，所述第二反射斜面与所述第一反射斜面配合并形成光反射通道以使光线出射；A composite microstructure layer, the composite microstructure layer includes a grating structure, the grating structure includes a plurality of first gratings arranged in sequence, and a row for connecting with the display panel is formed between every two adjacent first gratings The light exit channel corresponding to the sub-pixel in the direction of the light exit channel, the peripheral side of the light exit channel has a first inner wall and a second inner wall oppositely arranged; the first inner wall has a plurality of extending directions along the axis of the light exit channel toward the second inner wall The first microstructure protrusions are arranged, the second inner wall has a plurality of second microstructure protrusions arranged along the extension direction of the axis line of the light exit channel toward the first inner wall, and the first microstructure protrusions have a first reflective slope facing the light incident side of the light exit channel, the second microstructure protrusion has a second reflective slope facing away from the light incident side of the light exit channel and opposite to the first reflective slope, the The second reflection slope is matched with the first reflection slope and forms a light reflection channel to emit light;其中，相对于垂直于所述出光通道的轴心线的平面，所述第一反射斜面与所述平面的夹角大于所述第二反射斜面与所述平面的夹角。Wherein, with respect to a plane perpendicular to the axis of the light exit channel, the included angle between the first reflecting slope and the plane is greater than the included angle between the second reflecting slope and the plane.2.根据权利要求1所述的防窥膜，其特征在于，所述光栅结构还包括多个依次排列的第二光栅，所述第二光栅与所述第一光栅相交，所述第二光栅与所述第一光栅之间形成用于与所述显示面板的子像素一一对应的子出光通道；所述子出光通道的周侧还包括相对设置的第三内壁和第四内壁，所述第三内壁朝向所述第四内壁的表面与所述第一内壁朝向所述第二内壁的表面具有相同的结构，且所述第四内壁朝向所述第三内壁的表面与所述第二内壁朝向所述第一内壁的表面具有相同的结构。2 . The privacy protection film according to claim 1 , wherein the grating structure further comprises a plurality of second gratings arranged in sequence, the second gratings intersect with the first gratings, and the second gratings A sub-light-exiting channel for one-to-one correspondence with the sub-pixels of the display panel is formed between the first grating and the sub-light-exiting channel; The surface of the third inner wall facing the fourth inner wall has the same structure as the surface of the first inner wall facing the second inner wall, and the surface of the fourth inner wall facing the third inner wall and the second inner wall The surface facing the first inner wall has the same structure.3.根据权利要求1所述的防窥膜，其特征在于，所述第一反射斜面的表面形成有第一全反射层。3 . The privacy film according to claim 1 , wherein a first total reflection layer is formed on the surface of the first reflection slope. 4 .4.根据权利要求1所述的防窥膜，其特征在于，所述第二反射斜面的表面形成有第二全反射层。4 . The privacy protection film according to claim 1 , wherein a second total reflection layer is formed on the surface of the second reflection slope. 5 .5.根据权利要求1所述的防窥膜，其特征在于，所述第一反射斜面与所述平面的夹角为大于等于30°且小于等于80°。5 . The privacy protection film according to claim 1 , wherein the included angle between the first reflecting slope and the plane is greater than or equal to 30° and less than or equal to 80°. 6 .6.根据权利要求1所述的防窥膜，其特征在于，所述第二反射斜面与所述平面的夹角为大于等于20°且小于等于80°。6 . The privacy protection film according to claim 1 , wherein the included angle between the second reflecting slope and the plane is greater than or equal to 20° and less than or equal to 80°. 7 .7.根据权利要求1所述的防窥膜，其特征在于，所述第一全反射层的材料包括反射金属材料；和/或，所述第二全反射层的材料包括反射金属材料。7 . The privacy protection film according to claim 1 , wherein the material of the first total reflection layer comprises a reflective metal material; and/or the material of the second total reflection layer comprises a reflective metal material. 8 .8.根据权利要求1所述的防窥膜，其特征在于，还包括设于所述复合微结构层的出光侧的逆棱镜层。8 . The privacy protection film of claim 1 , further comprising an inverse prism layer disposed on the light-emitting side of the composite microstructure layer. 9 .9.一种显示面板，其特征在于，包括如权利要求1-8任一项所述防窥膜。9 . A display panel, characterized in that, comprising the privacy protection film according to any one of claims 1 to 8 . 10 .10.一种显示装置，其特征在于，包括如权利要求9所述的显示面板。10. A display device, comprising the display panel according to claim 9.

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