CN211554556U - Display device - Google Patents
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- CN211554556U CN211554556U CN201922426964.3U CN201922426964U CN211554556U CN 211554556 U CN211554556 U CN 211554556U CN 201922426964 U CN201922426964 U CN 201922426964U CN 211554556 U CN211554556 U CN 211554556U
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Abstract
The embodiment of the utility model discloses a display device, which comprises a display panel and a first visual angle control device positioned at the light-emitting side of the display panel; the first visual angle control device comprises a first polaroid, a first substrate, a first electrode, a first alignment layer, a first dye liquid crystal layer, a second alignment layer, a second electrode, a second substrate and a second polaroid which are arranged in sequence, wherein the first dye liquid crystal layer comprises liquid crystal molecules and dye molecules; the polarizing axis directions of the first polarizer and the second polarizer are arranged in parallel, and the alignment directions of the first alignment layer and the second alignment layer are vertical to the polarizing axis direction; the polarizing axis direction of the first visual angle control device is parallel to the polarizing axis direction of the polarizer on the light emitting side of the display panel. The display device disclosed by the embodiment is additionally provided with the first visual angle control device, the light-emitting angle is controlled by matching the dye molecules with the first polaroid and the second polaroid so as to realize wide and narrow visual angle switching, and a better peep-proof effect can be realized.
Description
Technical Field
The utility model relates to a show technical field, concretely relates to display device.
Background
The display device disclosed in the prior art has the advantages of good picture quality, small volume, light weight, low driving voltage, low power consumption, no radiation and relatively low manufacturing cost, and is dominant in the field of flat panel display.
With the continuous progress of display technology, the visual angle of the display has been widened from about 120 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying visual experience from a large visual angle, so as to avoid business loss or embarrassment caused by the leakage of screen information. Therefore, in addition to the wide viewing angle, the display device is also required to have a function of switching between the wide viewing angle and the narrow viewing angle.
In order to achieve protection of commercial confidentiality and personal privacy, a blind technology can be adopted, but with this technology, switching to a wide viewing angle mode is impossible, and loss of brightness is severe, and at the same time, manufacturing cost is high, and it is difficult to meet use requirements.
In view of the above, the applicant of the present invention has made extensive and intensive studies and researches on various defects and inconveniences caused by the perfection of the display device.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to disclose a display device, the utility model discloses aim at solving among the prior art unable fast switch-over wide visual angle mode of display device and narrow visual angle mode, and the not good scheduling problem of display effect and peep-proof effect.
In order to solve the technical problem, the utility model discloses a solution is: the display device comprises a display panel and a first visual angle control device positioned on the light emergent side of the display panel; the first visual angle control device comprises a first substrate, a first electrode, a first alignment layer, a first dye liquid crystal layer, a second alignment layer, a second electrode and a second substrate which are arranged in sequence; the first dye liquid crystal layer includes liquid crystal molecules and dye molecules dispersed in the liquid crystal molecules; a first polaroid is arranged on one side of the first substrate, which is far away from the first dye liquid crystal layer, a second polaroid is arranged on one side of the second substrate, which is far away from the first dye liquid crystal layer, the polarizing axis directions of the first polaroid and the second polaroid are arranged in parallel, and the alignment directions of the first alignment layer and the second alignment layer are mutually vertical to the polarizing axis direction; the polarizing axis direction of the first visual angle control device is parallel to the polarizing axis direction of the polarizer on the light emitting side of the display panel.
Preferably, the liquid crystal molecules of the first dye liquid crystal layer of the first viewing angle control device are positive liquid crystal molecules, the initial alignment of the positive liquid crystal molecules is parallel to the plane of the first substrate, and the long axis direction of the dye molecules is parallel to the long axis direction of the positive liquid crystal molecules.
Preferably, the liquid crystal molecules of the first dye liquid crystal layer of the first viewing angle control device are negative liquid crystal molecules, the initial alignment of the negative liquid crystal molecules is perpendicular to the plane of the first substrate, and the long axis direction of the dye molecules is parallel to the long axis direction of the negative liquid crystal molecules.
Preferably, the display panel is a liquid crystal display panel, and the display device further includes a backlight unit disposed at a light incident side of the liquid crystal display panel.
Preferably, the display device further comprises a second viewing angle control device located at the light incident side of the display panel; the second visual angle control device comprises a third substrate, a third electrode, a third alignment layer, a second dye liquid crystal layer, a fourth alignment layer, a fourth electrode and a fourth substrate which are arranged in sequence; the second dye liquid crystal layer includes liquid crystal molecules and dye molecules dispersed in the liquid crystal molecules; a third polarizer is arranged on one side of the third substrate, which is far away from the second dye liquid crystal layer, a fourth polarizer is arranged on one side of the fourth substrate, which is far away from the second dye liquid crystal layer, the polarizing axis directions of the third polarizer and the fourth polarizer are arranged in parallel, and the alignment directions of the third alignment layer and the fourth alignment layer are vertical to the polarizing axis direction; the polarizing axis direction of the second visual angle control device is parallel to the polarizing axis direction of the polarizer on the light incident side of the display panel; the alignment directions of the first visual angle control device and the second visual angle control device are mutually vertical.
Preferably, the display panel is any one of an organic light emitting diode display panel, a micro light emitting diode display panel, and a sub-millimeter light emitting diode display panel.
Preferably, the display device further comprises a light path adjusting device positioned at the light emitting side of the first viewing angle control device; the light path adjusting device comprises a fifth polaroid, a fifth substrate, a fifth electrode, a fifth alignment layer, a third liquid crystal layer, a sixth alignment layer, a sixth electrode, a sixth substrate and a sixth polaroid which are arranged in sequence; the polarizing axis directions of the fifth polarizer and the sixth polarizer are arranged in parallel; the optical path adjusting device comprises a first visual angle control device, a light path adjusting device, a first optical path adjusting device and a second optical path adjusting device, wherein the polarizing axis direction of the light path adjusting device is parallel to the polarizing axis direction of the first visual angle control device, and the alignment direction of the light path adjusting device is orthogonal to the alignment direction of the first visual angle control device.
Preferably, the liquid crystal molecules of the third liquid crystal layer are positive liquid crystal molecules, and the initial alignment of the positive liquid crystal molecules is parallel to the plane of the fifth substrate.
Preferably, the liquid crystal molecules of the third liquid crystal layer are negative liquid crystal molecules, and the initial alignment of the negative liquid crystal molecules is perpendicular to the plane of the fifth substrate.
Preferably, the first polarizer or the second polarizer of the first viewing angle control device is shared with the polarizer on the light emitting side of the display panel.
The embodiment of the utility model discloses a first visual angle controlling means has been add to this display device, arranges through dyestuff molecule and first polaroid, second polaroid three and carries out the control of light-emitting angle to realize that wide and narrow visual angle switches, and can realize better peep-proof effect.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent from the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:
fig. 1 is a schematic cross-sectional view illustrating a first viewing angle control device in a display device according to an embodiment of the present invention;
fig. 2 is a schematic cross-sectional view of a second viewing angle control device in a display device according to a second embodiment of the present invention;
fig. 3a is a schematic cross-sectional view of a display device in a narrow viewing angle mode according to a third embodiment of the present invention;
fig. 3b is a schematic cross-sectional view of a display device according to a third embodiment of the present invention in a wide viewing angle mode;
fig. 4a is a schematic cross-sectional view of a display device in a wide viewing angle mode according to a fourth embodiment of the present invention;
fig. 4b is a schematic cross-sectional view of a display device in a narrow viewing angle mode according to a fourth embodiment of the present invention;
fig. 5 is a schematic cross-sectional view of a display device disclosed in the fifth embodiment of the present invention;
fig. 6 is a schematic cross-sectional view of a display device according to a sixth disclosure of the present invention.
Detailed Description
In order to further explain the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, but not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Example one
Fig. 1 is a schematic cross-sectional view illustrating a first viewing angle control device in a display device according to an embodiment of the present invention. As shown in fig. 1, the present embodiment discloses a first viewing angle control device 100, which includes a first substrate 120, a first electrode 130, a first alignment layer (not shown), a first dye liquid crystal layer 140, a second alignment layer (not shown), a second electrode 150, and a second substrate 160, which are sequentially disposed, wherein the first dye liquid crystal layer 140 includes liquid crystal molecules 141 and dye molecules 142 dispersed in the liquid crystal molecules 141. The first polarizer 110 is disposed on a side of the first substrate 120 away from the first dye liquid crystal layer 140, and the second polarizer 170 is disposed on a side of the second substrate 160 away from the first dye liquid crystal layer 140. The polarizing axis directions of the first polarizer 110 and the second polarizer 170 are parallel, and the alignment directions of the first alignment layer and the second alignment layer are perpendicular to the polarizing axis direction. Specifically, the alignment directions of the first alignment layer and the second alignment layer are anti-parallel.
In this embodiment, the first dye liquid crystal layer 140 is a guest-host liquid crystal cell with the liquid crystal molecules 141 as the host and the dye molecules 142 as the guest. The dye molecules 142 are dissolved in the first dye liquid crystal layer 140, and are aligned in the same direction as the liquid crystal molecules 141 in the first dye liquid crystal layer 140, and the long axis directions of the two are parallel to each other. When the major axis direction of the liquid crystal molecules 141 as a host is changed by an electric field, the major axis of the dye molecules 142 is also changed. The absorption of the dye molecules 142 to visible light along the major axis and the minor axis is different, and when the visible light with the polarization direction parallel to the major axis of the dye molecules 142 is incident to the dye molecules 142, the absorption rate of the dye molecules 142 to visible light is maximized, and the light is almost completely absorbed; when visible light with the polarization direction perpendicular to the long axis direction of the dye molecules 142 is incident to the dye molecules 142, the absorption rate of the dye molecules 142 to the visible light is minimal and almost completely does not absorb the visible light; the absorbance of visible light by the dye molecules 142 is dynamically tunable when the polarization direction of visible light is in an intermediate state parallel and perpendicular to the long axis of the dye molecules 142. The embodiment utilizes the above properties of the dye molecules to enable the liquid crystal molecules in the first dye liquid crystal layer to be turned at different angles by controlling the first electrode and the second electrode, so as to drive the dye molecules to be turned at different angles, realize the modulation of transmittance of the light rays at different exit angles of the first visual angle control device, and simultaneously combine the first polarizer and the second polarizer positioned at two sides of the first visual angle control device, so as to realize the peep-proof effect.
In this embodiment, the dye molecule 142 is a positive bidirectional black dye. In other embodiments, the dye molecule may also be a mixture of positive dichroic red, positive dichroic blue, and positive dichroic yellow dyes. Azo, anthraquinone or other suitable dichroic dyes may be used in particular, without limitation.
In this embodiment, the liquid crystal molecules 141 of the first dye liquid crystal layer 140 are positive liquid crystal molecules, and the initial alignment of the positive liquid crystal molecules is parallel to the plane of the first substrate 120; the long axis direction of the dye molecules 142 is parallel to the long axis direction of the positive liquid crystal molecules. The positive liquid crystal molecules have a tendency of flipping with their long axes parallel to the electric field direction under the action of the electric field, and when an electric signal is applied to the first electrode 130 and the second electrode 150, an electric field perpendicular to the plane of the first substrate 120 is generated, so if it is desired that the positive liquid crystal molecules flip at different angles under the action of the electric field, it is necessary to make the initial alignment of the positive liquid crystal molecules perpendicular to the electric field direction, even if the initial alignment of the positive liquid crystal molecules is parallel to the plane of the first substrate 120.
In other embodiments, the liquid crystal molecules of the first liquid crystal layer may also be negative liquid crystal molecules, and the initial alignment of the negative liquid crystal molecules is perpendicular to the plane of the first substrate; the long axis direction of the dye molecules is parallel to the long axis direction of the negative liquid crystal molecules. The negative liquid crystal molecules have a tendency of turning with the long axis vertical to the direction of the electric field under the action of the electric field, and when an electric signal is applied to the first electrode and the second electrode, an electric field vertical to the plane of the first substrate is generated, so if the negative liquid crystal molecules are required to turn at different angles under the action of the electric field, the initial alignment of the negative liquid crystal molecules needs to be vertical to the direction of the electric field, even if the initial alignment of the negative liquid crystal molecules is vertical to the plane of the first substrate.
In this embodiment, the first electrode 130 and the second electrode 150 are both planar electrodes, and can generate an electric field perpendicular to the plane of the first substrate 120, and the electric field generated at each position is uniform. In practical applications, the first electrode 130 and the second electrode 150 can be made of a transparent conductive material, such as indium tin oxide, so as to adjust the transmittance of the emergent light. The first electrode and the second electrode are made of the whole transparent conductive material, so that the influence of the electrode on the transmittance can be avoided.
Specifically, in the present embodiment, the polarization directions of the first polarizer 110 and the second polarizer 170 are both 0 °, the alignment directions of the first dye liquid crystal layer 140 are 90 ° and 270 °, respectively, and the long axis direction of the liquid crystal molecules in the first dye liquid crystal layer 140 is perpendicular to the polarization direction.
When no voltage is applied to the first electrode 130 and the second electrode 150, the dye molecules 142 are uniformly arranged along the liquid crystal molecules 141 of the first dye liquid crystal layer 140, the polarization axis direction is perpendicular to the absorption axis of the dye molecules 142, the emitted polarized light has no absorption or less absorption, the viewing angle formed by the emitted light is larger, and the wide viewing angle display is realized.
When a voltage is applied to the first electrode 130 and the second electrode 150, the long axis of the liquid crystal molecules 141 in the first dye liquid crystal layer 140 is turned and turned over with respect to the first substrate 120, and the dye molecules 142 are driven to turn over accordingly. The incident light sequentially passes through the second polarizer 170, the first dye liquid crystal layer 140 and the first polarizer 110, so that the oblique emergent light parallel to the long axis direction of the dye molecules 142 is directly absorbed in the oblique emergent light entering the first dye liquid crystal layer 140 after passing through the second polarizer 170, and the oblique emergent light turned by the liquid crystal molecules 141 is absorbed by the first polarizer 110, only the incident light vertically entering the first dye liquid crystal layer 140 can pass through the first polarizer 110 and be emitted, thereby limiting the viewing angle width and brightness (namely, the orientations of 0 ° and 180 °) at the left and right sides of the first viewing angle control device 100, and realizing the display of a left and right narrow viewing angle.
The embodiment of the utility model discloses this first visual angle controlling means arranges through dye molecule and first polaroid, second polaroid three and carries out the control of light-emitting angle to realize that the wide and narrow visual angle switches, and can realize that the visual angle narrows about, the peep-proof effect is better.
Example two
Fig. 2 is a schematic cross-sectional view of a second viewing angle control device in a display device according to a second embodiment of the present invention; the second viewing angle control device 300 of the present embodiment includes a third substrate 320, a third electrode 330, a third alignment layer (not shown), a second dye liquid crystal layer 340, a fourth alignment layer (not shown), a fourth electrode 350, and a fourth substrate 360, which are sequentially disposed, wherein the second dye liquid crystal layer 340 includes liquid crystal molecules 341 and dye molecules 342 dispersed in the liquid crystal molecules 341. A third polarizer 310 is disposed on a side of the third substrate 320 far away from the second dye liquid crystal layer 340, and a fourth polarizer 370 is disposed on a side of the fourth substrate 360 far away from the second dye liquid crystal layer 340. The polarization axis directions of the third polarizer 310 and the fourth polarizer 370 are parallel, and the alignment directions of the third alignment layer and the fourth alignment layer are perpendicular to the polarization axis direction. Specifically, the alignment directions of the third alignment layer and the third alignment layer are anti-parallel.
In this embodiment, the polarization directions of the third polarizer 310 and the fourth polarizer 370 are both 90 °, the alignment directions of the second dye liquid crystal layer 340 are 0 ° and 180 °, and the long axis direction of the liquid crystal molecules 341 in the second dye liquid crystal layer 340 is perpendicular to the polarization direction.
When no voltage is applied to the third electrode 330 and the fourth electrode 350, the dye molecules 342 are uniformly arranged along the liquid crystal molecules 341 of the second dye liquid crystal layer 340, the polarization axis direction is perpendicular to the absorption axis of the dye molecules 342, the emitted polarized light is not absorbed or is less absorbed, the viewing angle formed by the emitted light is larger, and the wide viewing angle display is realized.
When a voltage is applied to the third electrode 330 and the fourth electrode 350, the long axes of the liquid crystal molecules 341 in the second dye liquid crystal layer 340 are turned and turned over with respect to the third substrate 320, and the dye molecules 342 are also turned over. The incident light sequentially passes through the fourth polarizer 370, the second dye liquid crystal layer 340 and the third polarizer 310, such that the oblique emergent light entering the second dye liquid crystal layer 340 obliquely through the fourth polarizer 370 is directly absorbed by the oblique emergent light parallel to the long axis direction of the dye molecules 342, and the oblique emergent light turned by the liquid crystal molecules 341 is absorbed by the third polarizer 310, only the incident light vertically entering the second dye liquid crystal layer 340 can pass through the third polarizer 310 and be emitted, such that the viewing angle width and brightness (i.e., 90 ° and 270 ° orientations) at the upper and lower sides of the second viewing angle control device 300 are limited, and the display with narrow viewing angle at the upper and lower sides is implemented.
The embodiment of the utility model discloses this second visual angle controlling means arranges through dyestuff molecule and third polaroid, fourth polaroid three and carries out the control of light-emitting angle to realize that wide and narrow visual angle switches, and visual angle narrows down about can realizing, the peep-proof effect is better.
EXAMPLE III
Fig. 3a is a schematic cross-sectional view of a display device in a narrow viewing angle mode according to a third embodiment of the present invention; fig. 3b is a schematic cross-sectional view of a display device in a wide viewing angle mode according to a third disclosure of the present invention.
As shown in fig. 3a and 3 b: the embodiment discloses a display device, which comprises a display panel 200 and a first viewing angle control device 100 positioned on the light emitting side of the display panel 200.
In this embodiment, the polarizing axes of the upper polarizer and the lower polarizer 220 of the display panel 200 are arranged vertically. The polarizing axis direction of the second polarizer 170 of the first viewing angle control device 100 is parallel to the polarizing axis direction of the upper polarizer (not shown) on the light emitting side of the display panel 200. The second polarizer 170 of the first viewing angle control device 100 is shared with the upper polarizer on the light emitting side of the display panel 200, which is beneficial to further reducing the thickness of the whole display device. In other embodiments, they may be set simultaneously, and are not limited herein.
Specifically, the display panel 200 is a liquid crystal display panel, and the liquid crystal display panel is specifically of FFS or IPS architecture. The display device further comprises a backlight unit (not shown in the figure) disposed at the light incident side of the display panel 200, and the first viewing angle control device 100 is located at a side of the display panel 200 away from the backlight unit.
In the display device disclosed in the present embodiment, a light source is emitted from the backlight unit, enters the display device 200, and then enters the first viewing angle control device 100. When no voltage is applied to the first electrode 130 and the second electrode 150 of the first viewing angle control device 100, the dye molecules 142 are uniformly arranged along the liquid crystal molecules 141 of the first dye liquid crystal layer 140, the polarization axis direction is perpendicular to the absorption axis of the dye molecules 142, the emitted polarized light is not absorbed or is less absorbed, and the viewing angle formed by the emitted light is larger, thereby realizing wide viewing angle display.
When a voltage is applied to the first electrode 130 and the second electrode 150 of the first viewing angle control device 100, the long axis of the liquid crystal molecules 141 in the first dye liquid crystal layer 140 will be turned and turned over relative to the first substrate 120, and the dye molecules 142 will be driven to turn over accordingly. The incident light sequentially passes through the second polarizer 170, the first dye liquid crystal layer 140 and the first polarizer 110, so that the oblique emergent light parallel to the long axis direction of the dye molecules 142 is directly absorbed in the oblique emergent light entering the first dye liquid crystal layer 140 after passing through the second polarizer 170, and the oblique emergent light turned by the liquid crystal molecules 141 is absorbed by the first polarizer 110, only the incident light vertically entering the first dye liquid crystal layer 140 can pass through the first polarizer 110 and be emitted, thereby limiting the viewing angle width and brightness (namely, the orientations of 0 ° and 180 °) at the left and right sides of the first viewing angle control device 100, and realizing the display of a left and right narrow viewing angle.
The display device disclosed by the embodiment realizes wide and narrow visual angle switching by adding the first visual angle control device on the light emitting side of the display panel, can realize left and right narrow visual angle display, and has better display effect and peep-proof effect.
Example four
Fig. 4a is a schematic cross-sectional view of a display device in a wide viewing angle mode according to a fourth embodiment of the present invention; fig. 4b is a schematic cross-sectional view of a display device in a narrow viewing angle mode according to a fourth embodiment of the present invention.
In conjunction with fig. 4a and 4 b: the embodiment discloses a display device, which comprises a display panel 200, a first viewing angle control device 100 positioned on the light-emitting side of the display panel 200, and a second viewing angle control device 300 positioned on the light-emitting side of the display panel 200. The alignment directions of the first viewing angle control device 100 and the second viewing angle control device 300 are perpendicular to each other.
In this embodiment, the display panel 200 is a liquid crystal display panel, and the liquid crystal display panel is specifically of an FFS or IPS architecture.
The polarizing axis direction of the second polarizer 170 of the first viewing angle control device 100 is parallel to the polarizing axis direction of the upper polarizer (not shown) on the light emitting side of the display panel 200, and the polarizing axis directions of the upper polarizer and the lower polarizer (not shown) of the display panel 200 are perpendicular to each other. The polarization axis direction of the third polarizer 310 of the second viewing angle control device 300 is parallel to the polarization axis direction of the lower polarizer on the light incident side of the display panel 200.
In this embodiment, the second polarizer 170 of the first viewing angle control device 100 is shared with the upper polarizer on the light emitting side of the display panel 200; the third polarizer 310 of the second viewing angle control device 300 is shared with the lower polarizer on the light incident side of the display panel 200, which is beneficial to further reducing the thickness of the entire display device. In other embodiments, they may be set simultaneously, and are not limited herein.
When no voltage is applied to the first viewing angle control device 100 and the second viewing angle control device 300, the dye molecules are uniformly arranged along the liquid crystal molecules, the polarization axis direction is perpendicular to the absorption axis of the dye molecules, the emitted polarized light is not absorbed or is less absorbed, the viewing angle formed by the emitted light is larger, the incident light entering the display panel 200 and the viewing angle emitted to the first viewing angle control device 100 and the second viewing angle control device 300 are also larger, thereby realizing wide viewing angle display.
When voltage is applied to the first viewing angle control device 100 and the second viewing angle control device 300, the viewing angle widths and the brightnesses (i.e., the orientations of 0 °, 90 °, 180 °, and 270 °) of the upper and lower sides and the left and right sides of the display panel 200 can be simultaneously limited, thereby realizing narrow viewing angle display in the upper, lower, left, and right directions.
The display device disclosed in the embodiment has the advantages that the first visual angle control device is additionally arranged on the light emitting side of the display panel, the second visual angle control device is additionally arranged on the light incident side, the wide and narrow visual angles can be switched, the display of the upper and lower narrow visual angles and the display of the left and right narrow visual angles can be realized, and the display effect and the peep-proof effect are better. The display device can receive light under a large visual angle, does not influence the front brightness, and does not need to increase APF (active matrix filter) to improve the penetration rate; meanwhile, the alignment directions of the first visual angle control device and the second visual angle control device are mutually vertical, so that domain complementation is realized, color cast is inhibited, and extra compensation is not needed after the liquid crystal display panel is attached.
EXAMPLE five
Fig. 5 is a schematic cross-sectional view of a display device according to a fifth disclosure of the present invention.
As shown in fig. 5, the display device disclosed in the present embodiment includes a display panel 200 'and a first viewing angle control device 100 located on a light emitting side of the display panel 200'. Specifically, the display panel 200' is an organic light emitting diode display panel, and a backlight module is not required, so that the overall thickness of the device can be reduced.
In other embodiments, the display panel 200' may be any one of a micro led display panel and a sub-millimeter led display panel, which is not limited herein.
The organic light emitting diode display panel comprises a substrate base plate and an organic light emitting diode device positioned on the substrate base plate. In order to improve the display contrast of the oled display panel against the ambient light reflection, a circular polarizer is generally disposed on the light emitting side of the oled display panel, and the circular polarizer includes a polarizer and a phase retarder (i.e., 1/4 λ plate). In this embodiment, the second polarizer 170 of the first viewing angle control device 100 is shared with the polarizer on the light emitting side of the oled display panel, which is beneficial to further reducing the overall thickness of the device.
According to the display device disclosed by the embodiment, the first visual angle control device is additionally arranged on the light emitting side of the organic light emitting diode display panel so as to realize wide and narrow visual angle switching, narrow visual angle display can be realized, and the display effect and the peep-proof effect are better.
EXAMPLE six
Fig. 6 is a schematic cross-sectional view of a display device according to a sixth disclosure of the present invention.
As shown in fig. 6, the display device disclosed in the present embodiment includes a display panel 200 'and a first viewing angle control device 100 located on a light emitting side of the display panel 200'. Specifically, the display panel 200' is an organic light emitting diode display panel, and a backlight module is not required, so that the overall thickness of the device can be reduced.
The optical path adjusting device 400 is located at the light emitting side of the first viewing angle control device 100, the optical path adjusting device 400 includes a fifth polarizer 410, a fifth substrate 420, a fifth electrode 430, a fifth alignment layer (not shown), a third liquid crystal layer 440, a sixth alignment layer (not shown), a sixth electrode 450, a sixth substrate 460 and a sixth polarizer 470, which are sequentially arranged, the alignment directions of the fifth alignment layer and the sixth alignment layer are anti-parallel to each other, and the polarization axes of the fifth polarizer 410 and the sixth polarizer 470 are parallel to each other; the polarization axis direction of the optical path adjusting device 400 is parallel to the polarization axis direction of the first viewing angle control device 100, and the alignment direction of the optical path adjusting device 400 is orthogonal to the alignment direction of the first viewing angle control device 100.
In this embodiment, the liquid crystal molecules of the third liquid crystal layer 440 are positive liquid crystal molecules and do not include dye molecules. The initial alignment of the positive liquid crystal molecules is parallel to the plane of the fifth substrate 420. In other embodiments, the liquid crystal molecules of the third liquid crystal layer 440 may also be negative liquid crystal molecules, and the initial alignment of the negative liquid crystal molecules is perpendicular to the plane of the fifth substrate 420, which is not limited herein.
In this embodiment, the second polarizer 170 of the first viewing angle control device 100 is shared with the polarizer on the light emitting side of the oled display panel, and the sixth polarizer 470 of the optical path adjusting device 400 is shared with the first polarizer (not shown) of the first viewing angle control device 100. In other embodiments, they may be set simultaneously, and are not limited herein.
When no voltage is applied to the first viewing angle control device 100 and the optical path adjusting device 400, the dye molecules 142 are uniformly arranged along the liquid crystal molecules 141 of the first dye liquid crystal layer 140, the polarization axis direction is perpendicular to the absorption axis of the dye molecules 142, the emitted polarized light is not absorbed or is less absorbed, the viewing angle formed by the emitted light is larger, and the viewing angle emitted to the first viewing angle control device 100 and the optical path adjusting device 400 is also larger, thereby realizing wide viewing angle display.
When voltage is applied to the first viewing angle control device 100 and the light path adjusting device 400, the viewing angle widths and the brightnesses (i.e., the orientations of 0 °, 90 °, 180 ° and 270 °) of the upper and lower sides and the left and right sides of the oled display panel can be simultaneously limited, thereby realizing narrow viewing angle display in the upper, lower, left, and right directions.
The display device disclosed by the embodiment is provided with the first visual angle control device and the light path adjusting device on the light emitting side of the organic light emitting diode display panel so as to realize wide and narrow visual angle switching, can realize display of narrow visual angles up and down and left and right, and has better display effect and peep-proof effect. The display device can receive light under a large visual angle, does not influence the front brightness, and does not need to increase the APF (active matrix filter) to improve the penetration rate; meanwhile, the alignment directions of the first visual angle control device and the light path adjusting device are mutually vertical, domain complementation is realized, color cast is inhibited, and extra compensation is not needed after the first visual angle control device and the light path adjusting device are attached to the organic light emitting diode display panel.
The foregoing is a complete disclosure of the present invention, and in this specification, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, including other elements not expressly listed, in addition to those elements listed.
In the present specification, the terms of front, rear, upper, lower and the like are defined by the positions of the components in the drawings and the positions of the components relative to each other, and are only used for the sake of clarity and convenience in technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.
The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A display device comprising a display panel, characterized in that: the display panel also comprises a first visual angle control device positioned on the light emergent side of the display panel;
the first visual angle control device comprises a first substrate, a first electrode, a first alignment layer, a first dye liquid crystal layer, a second alignment layer, a second electrode and a second substrate which are arranged in sequence; the first dye liquid crystal layer includes liquid crystal molecules and dye molecules dispersed in the liquid crystal molecules; a first polarizer is arranged on one side of the first substrate, which is far away from the first dye liquid crystal layer, a second polarizer is arranged on one side of the second substrate, which is far away from the first dye liquid crystal layer, the polarizing axis directions of the first polarizer and the second polarizer are arranged in parallel, and the alignment directions of the first alignment layer and the second alignment layer are perpendicular to the polarizing axis direction;
the polarizing axis direction of the first visual angle control device is parallel to the polarizing axis direction of the polarizer on the light emitting side of the display panel.
2. The display device of claim 1, wherein: the liquid crystal molecules of the first dye liquid crystal layer of the first visual angle control device are positive liquid crystal molecules, the initial alignment of the positive liquid crystal molecules is parallel to the plane where the first substrate is located, and the long axis direction of the dye molecules is parallel to the long axis direction of the positive liquid crystal molecules.
3. The display device of claim 1, wherein: the liquid crystal molecules of the first dye liquid crystal layer of the first visual angle control device are negative liquid crystal molecules, the initial alignment of the negative liquid crystal molecules is vertical to the plane where the first substrate is located, and the long axis direction of the dye molecules is parallel to the long axis direction of the negative liquid crystal molecules.
4. The display device of claim 1, wherein: the display device comprises a display panel, a backlight unit and a liquid crystal display panel, wherein the display panel is a liquid crystal display panel, and the backlight unit is arranged on the light incident side of the liquid crystal display panel.
5. The display device of claim 4, wherein: the display device also comprises a second visual angle control device positioned at the light incident side of the display panel;
the second visual angle control device comprises a third substrate, a third electrode, a third alignment layer, a second dye liquid crystal layer, a fourth alignment layer, a fourth electrode and a fourth substrate which are arranged in sequence; the second dye liquid crystal layer includes liquid crystal molecules and dye molecules dispersed in the liquid crystal molecules; a third polarizer is arranged on one side of the third substrate, which is far away from the second dye liquid crystal layer, a fourth polarizer is arranged on one side of the fourth substrate, which is far away from the second dye liquid crystal layer, the polarizing axis directions of the third polarizer and the fourth polarizer are arranged in parallel, and the alignment directions of the third alignment layer and the fourth alignment layer are perpendicular to the polarizing axis direction; the polarizing axis direction of the second visual angle control device is parallel to the polarizing axis direction of the polarizer on the light incident side of the display panel;
wherein the alignment directions of the first viewing angle control device and the second viewing angle control device are perpendicular to each other.
6. The display device of claim 1, wherein: the display panel is any one of an organic light-emitting diode display panel, a micro light-emitting diode display panel and a sub-millimeter light-emitting diode display panel.
7. A display device as claimed in claim 6, characterized in that: the display device also comprises a light path adjusting device positioned on the light emitting side of the first visual angle control device;
the optical path adjusting device comprises a fifth polaroid, a fifth substrate, a fifth electrode, a fifth alignment layer, a third liquid crystal layer, a sixth alignment layer, a sixth electrode, a sixth substrate and a sixth polaroid which are arranged in sequence; the polarizing axis directions of the fifth polarizer and the sixth polarizer are arranged in parallel;
the polarizing axis direction of the optical path adjusting device is parallel to the polarizing axis direction of the first viewing angle control device, and the alignment direction of the optical path adjusting device is orthogonal to the alignment direction of the first viewing angle control device.
8. A display device as claimed in claim 7, characterized in that: and the liquid crystal molecules of the third liquid crystal layer are positive liquid crystal molecules, and the initial alignment of the positive liquid crystal molecules is parallel to the plane of the fifth substrate.
9. A display device as claimed in claim 7, characterized in that: and liquid crystal molecules of the third liquid crystal layer are negative liquid crystal molecules, and the initial alignment of the negative liquid crystal molecules is vertical to the plane of the fifth substrate.
10. The display device of claim 1, wherein: the first polaroid or the second polaroid of the first visual angle control device is shared with the polaroid on the light emitting side of the display panel.
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