CN114594622A - Display panel with switchable wide and narrow viewing angles and display device - Google Patents
Display panel with switchable wide and narrow viewing angles and display device Download PDFInfo
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- CN114594622A CN114594622A CN202210275828.2A CN202210275828A CN114594622A CN 114594622 A CN114594622 A CN 114594622A CN 202210275828 A CN202210275828 A CN 202210275828A CN 114594622 A CN114594622 A CN 114594622A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133504—Diffusing, scattering, diffracting elements
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1347—Arrangement of liquid crystal layers or cells in which the final condition of one light beam is achieved by the addition of the effects of two or more layers or cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract
The invention discloses a display panel with switchable wide and narrow viewing angles and a display device. Through set up the diffusion zone and the non-diffusion zone of patterning on the changeable display panel of wide and narrow visual angle, the diffusion zone is stronger than the diffusion capacity of non-diffusion zone to light to the scattering capacity of light, thereby make display panel when narrow visual angle, the visual angle scope of diffusion zone and non-diffusion zone is inequality, the user can see the light of diffusion zone diffusion in big visual angle position, the pattern of diffusion zone can be designed, make the pattern that corresponds with the diffusion zone can be seen in narrow visual angle big visual angle position, and the picture of demonstration can be seen again in the peep-proof visual angle scope.
Description
Technical Field
The invention relates to the technical field of displays, in particular to a display panel with switchable wide and narrow viewing angles and a display device.
Background
With the continuous progress of the liquid crystal display technology, the viewing angle of the display has been widened from about 112 ° to over 160 °, and people want to effectively protect business confidentiality and personal privacy while enjoying visual experience brought by a large viewing angle, so as to avoid business loss or embarrassment caused by the leakage of screen information. Therefore, in addition to the wide viewing angle requirement, in many cases, the display device is required to have a function of switching between a wide viewing angle and a narrow viewing angle.
At present mainly take attached tripe barrier film on the display screen to realize the switching of wide narrow visual angle, when needs peep-proof, utilize the tripe barrier film to cover the screen and can reduce the visual angle, but this kind of mode needs additionally to prepare the tripe barrier film, can cause very big inconvenience for the user, and a tripe barrier film can only realize a visual angle, in case after the attached tripe barrier film, the visual angle is just fixed in narrow visual angle mode, lead to can't freely switch between wide visual angle mode and narrow visual angle mode, and the peep-proof piece can cause the luminance to reduce and influence the display effect.
In the prior art, a dimming box and a display panel are used for switching between a wide viewing angle and a narrow viewing angle, the display panel is used for displaying normal pictures, the dimming box is used for controlling the switching of the viewing angles, the dimming box comprises a first substrate, a second substrate and a liquid crystal layer between the first substrate and the second substrate, and viewing angle control electrodes on the first substrate and the second substrate apply a vertical electric field to liquid crystal molecules to enable the liquid crystal to deflect towards the vertical direction, so that a narrow viewing angle mode is realized. By controlling the voltage on the viewing angle control electrode, switching between a wide viewing angle and a narrow viewing angle can be achieved.
The display panel in the prior art is only used for displaying pictures at a wide viewing angle or a narrow viewing angle, and cannot be used for seeing the display pictures or the display LOGO at the narrow viewing angle.
Disclosure of Invention
In order to overcome the disadvantages and shortcomings in the prior art, an object of the present invention is to provide a display panel and a display device with switchable wide and narrow viewing angles, so as to solve the problem that the display panel in the prior art cannot simultaneously see a display screen and display a LOGO at a narrow viewing angle.
The purpose of the invention is realized by the following technical scheme:
the invention provides a display panel with switchable wide and narrow viewing angles, which can be switched between the wide viewing angle and the narrow viewing angle, and comprises a display area and a non-display area positioned at the peripheral edge of the display area, wherein the display area comprises a patterned diffusion area and a non-diffusion area, and the light scattering capacity of the diffusion area is stronger than that of the non-diffusion area.
The display panel is further provided with a diffusion structure corresponding to the diffusion region, and the diffusion structure can scatter light passing through the diffusion structure.
Furthermore, the diffusion structure comprises a prism layer and a medium layer which is arranged in a laminating manner with the prism layer, the medium layer is arranged on the upper surface of the prism layer, and the refractive index of the prism layer is greater than that of the medium layer; or the dielectric layer is arranged on the lower surface of the prism layer, and the refractive index of the prism layer is smaller than that of the dielectric layer.
Further, the display panel comprises a dimming box and a display box which are stacked with each other;
the dimming box comprises a first substrate, a second substrate and a first liquid crystal layer, wherein the second substrate is arranged opposite to the first substrate, the first liquid crystal layer is arranged between the first substrate and the second substrate, a first visual angle electrode is arranged on one side, facing the first liquid crystal layer, of the first substrate, and a second visual angle electrode matched with the first visual angle electrode is arranged on one side, facing the first liquid crystal layer, of the second substrate;
the display box comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a second liquid crystal layer arranged between the color film substrate and the array substrate.
Further, the diffusion structure is arranged on the first substrate; or, the diffusion structure is arranged on the second substrate.
Furthermore, one side of the dimming box, which is far away from the display box, is provided with a first polaroid, a second polaroid is arranged between the dimming box and the display box, one side of the display box, which is far away from the dimming box, is provided with a third polaroid, a transmission shaft of the first polaroid is parallel to a transmission shaft of the second polaroid, and the transmission shaft of the third polaroid is perpendicular to the transmission shaft of the second polaroid.
Furthermore, a viewing angle compensation film is arranged between the dimming box and the display box, and/or the second polarizer is a composite structure film of an APF film and the viewing angle compensation film.
Furthermore, the display panel is provided with a light condensation structure corresponding to the non-diffusion area, and the light condensation structure can condense the light rays passing through the light condensation structure.
Further, the diffusion region is located at the center of the display region, and the non-diffusion region surrounds the periphery of the diffusion region.
The invention also provides a display device which comprises the display panel with switchable wide and narrow viewing angles.
The invention has the beneficial effects that: through set up the diffusion zone and the non-diffusion zone of patterning on the changeable display panel of wide and narrow visual angle, the diffusion zone is stronger than the diffusion capacity of non-diffusion zone to light to the scattering capacity of light, thereby make display panel when narrow visual angle, the visual angle scope of diffusion zone and non-diffusion zone is inequality, the user can see the light of diffusion zone diffusion in big visual angle position, the pattern of diffusion zone can be designed, make the pattern that corresponds with the diffusion zone can be seen in narrow visual angle big visual angle position, and the picture of demonstration can be seen again in the peep-proof visual angle scope.
Drawings
FIG. 1 is a schematic diagram of a switchable wide-and-narrow viewing angle display device according to the present invention;
FIG. 2 is a schematic diagram of a switchable display device with a narrow viewing angle according to the present invention;
FIG. 3 is a schematic diagram of a flat-panel display panel with switchable wide and narrow viewing angles according to the present invention;
FIG. 4 is a schematic perspective view of a prism layer and a second substrate according to the present invention;
FIG. 5 is a graph of simulation data at wide and narrow viewing angles for the present invention and prior art;
FIG. 6 is a schematic diagram of a flat panel display device with switchable wide and narrow viewing angles according to the present invention;
FIG. 7 is a second schematic diagram of a flat-panel display device with switchable wide and narrow viewing angles according to the present invention;
FIG. 8 is a schematic view of a process for fabricating a diffusion structure according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given of specific embodiments, structures, features and effects of the display panel and the display device with switchable wide and narrow viewing angles according to the present invention with reference to the accompanying drawings and preferred embodiments:
fig. 1 is a schematic structural diagram of a display device switchable between wide and narrow viewing angles according to the present invention. Fig. 2 is a schematic structural diagram of the switchable wide and narrow viewing angles display device in the invention at the time of narrow viewing angles. Fig. 3 is a schematic plane structure diagram of the switchable wide and narrow viewing angles display panel of the present invention. FIG. 4 is a schematic perspective view of a prism layer and a second substrate according to the present invention. Fig. 5 is a graph of simulation data at wide and narrow viewing angles for the present invention and the prior art.
As shown in fig. 1 to 4, the display panel with switchable wide and narrow viewing angles provided by the present invention can be switched between a wide viewing angle and a narrow viewing angle. The display panel has a display area 100 and a non-display area 200 located at the peripheral edge of the display area 100, the display area 100 includes a patterned diffusion area 110 and a non-diffusion area 120, the diffusion area 110 has a stronger light scattering ability than the non-diffusion area 120, or the diffusion area 110 has a weaker light converging ability than the non-diffusion area 120.
Through set up the diffusion zone 110 and the non-diffusion zone 120 of patterning on the changeable display panel of wide and narrow visual angle, the diffusion zone 110 is stronger than the scattering ability of non-diffusion zone 120 to light to the scattering ability of light, thereby make the display panel when narrow visual angle, the visual angle scope of diffusion zone 110 and non-diffusion zone 120 is different, the user can see the light of diffusion zone 110 diffusion in big visual angle position, can design the pattern of diffusion zone 110 (LOGO pattern as shown in figure 4), make can see the pattern that corresponds with diffusion zone 110 in narrow visual angle big visual angle position, can see the LOGO pattern in narrow visual angle big visual angle position promptly, and can see the picture of display again in the peep-proof scope, thereby promote customer brand effect.
In this embodiment, the diffusion region 110 is preferably located at the center of the display region 100, and the non-diffusion region 120 surrounds the periphery of the diffusion region 110. Of course, the diffusion region 110 can be adjusted according to the required display position of the LOGO pattern, and the size of the diffusion region 110 can also be adjusted according to the size of the LOGO pattern. Preferably, the LOGO font width needs to be in the millimeter order to be recognizable to the human eye.
In this embodiment, the display panel is provided with a diffusion structure corresponding to the diffusion region 110, and the diffusion structure can scatter light passing through the diffusion structure. Of course, a light-gathering structure corresponding to the non-diffusion area 120 may also be disposed on the display panel, and the light-gathering structure can gather the light passing through the light-gathering structure, so that the viewing angle ranges of the diffusion area 110 and the non-diffusion area 120 are different when the viewing angle is narrow.
Further, the diffusion structure includes a prism layer 122 and a dielectric layer 123 stacked on the prism layer 122, and as can be seen from the law of refraction of light (n1sin θ 1 — n2sin θ 2), light is refracted by media with different refractive indexes to realize an astigmatism effect. For example, the dielectric layer 123 is disposed on the upper surface of the prism layer 122, and the refractive index of the prism layer 122 is greater than that of the dielectric layer 123. Alternatively, the dielectric layer 123 is disposed on the lower surface of the prism layer 122, and the refractive index of the prism layer 122 is smaller than that of the dielectric layer 123. The light emitting direction of the backlight is from bottom to top.
Further, the cross-sectional shape of the prism layer 122 may be triangular, trapezoidal, or semicircular. The prism layer 122 may be made of an insulating layer material (PV) having a refractive index of 1.91, the dielectric layer 123 may be made of a planarization layer material (OC) having a refractive index of 1.56, and the thickness of the prism layer 122 may be adjusted according to a desired scattering range, for example, as follows:
for example, the normal peep-proof viewing angle is-45 to 45 degrees, which can control the diffusion range of the diffusion structure to-30 to-60 degrees and 30 to 60 degrees, so that the normal picture can be seen in the range of-45 to 45 degrees, and the LOGO pattern can be seen in the ranges of-45 to-60 degrees and 45 to 60 degrees, but the displayed picture cannot be seen. Referring to fig. 5, a curve W is a wide view angle and transmittance curve, a curve N1 is a narrow view angle and transmittance curve of the prior art, a curve N2 is a narrow view angle and transmittance curve of the present embodiment, and a region a on a curve N2 is a visible view angle range of the LOGO pattern. Since the difference between the brightness of the diffusion region 110 at the front and large viewing angles and the brightness of the non-diffusion region 120 is small, the front and side LOGO patterns are not visible at the wide viewing angles.
In the present embodiment, as shown in fig. 1 and 2, the display panel switchable between wide and narrow viewing angles includes a light modulation box 10 and a display box 20 which are stacked on each other. Preferably, the light modulation box 10 is disposed above the display box 20, that is, the display box 20 is disposed between the light modulation box 10 and the backlight module 40, the light modulation box 10 is used for controlling a viewing angle of the liquid crystal display device, and the display box 20 is used for controlling the liquid crystal display device to display a normal picture. Of course, the light modulation box 10 can also be disposed below the display box 20, i.e. the light modulation box 10 is disposed between the display box 20 and the backlight module 40. Of course, in other embodiments, the display panel with switchable wide and narrow viewing angles may also adopt other types of display panels, and only the function of switching the wide and narrow viewing angles is required.
The light adjusting box 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a first liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12. The first substrate 11 is provided with a first viewing angle electrode 111 on a side facing the first liquid crystal layer 13, the second substrate 12 is provided with a second viewing angle electrode 121 matched with the first viewing angle electrode 111 on a side facing the first liquid crystal layer 13, and the deflection of liquid crystal molecules in the first liquid crystal layer 13 is controlled by controlling a voltage difference between the first viewing angle electrode 111 and the second viewing angle electrode 121, so that the switching of wide and narrow viewing angles is controlled.
The first liquid crystal layer 13 preferably uses positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned parallel to the first substrate 11 and the second substrate 12, and the alignment directions of the positive liquid crystal molecules near the first substrate 11 and the positive liquid crystal molecules near the second substrate 12 are parallel or antiparallel, so that the light modulation cell 10 exhibits a wide viewing angle display in the initial state, as shown in fig. 1. As shown in fig. 2, when a narrow viewing angle display is required, a viewing angle control voltage is applied to the first viewing angle electrode 111 or the second viewing angle electrode 121, so that a large voltage difference (for example, AC of 2.6V) is formed between the first viewing angle electrode 111 and the second viewing angle electrode 121, and the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected in the vertical direction, so that the light modulation cell 10 exhibits a narrow viewing angle display.
In this embodiment, the display cell 20 is a liquid crystal cell. Of course, in other embodiments, the display box 20 may also be a self-emissive display (e.g., OLED display, Micro LED display).
The display box 20 includes a color filter substrate 21, an array substrate 22 disposed opposite to the color filter substrate 21, and a second liquid crystal layer 23 disposed between the color filter substrate 21 and the array substrate 22. The second liquid crystal layer 23 preferably uses positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the second liquid crystal layer 23 are aligned parallel to the color filter substrate 21 and the array substrate 22, and the alignment directions of the positive liquid crystal molecules near the color filter substrate 21 and the positive liquid crystal molecules near the array substrate 22 are parallel or antiparallel. Of course, in other embodiments, the second liquid crystal layer 23 may also adopt negative liquid crystal molecules, and the negative liquid crystal molecules in the second liquid crystal layer 23 may be aligned perpendicular to the color film substrate 21 and the array substrate 22, that is, in an alignment manner similar to the VA display mode.
Furthermore, a first polarizer 31 is disposed on one side of the light adjusting box 10 away from the display box 20, a second polarizer 32 is disposed between the light adjusting box 10 and the display box 20, a third polarizer 33 is disposed on one side of the display box 20 away from the light adjusting box 10, a transmission axis of the first polarizer 31 is parallel to a transmission axis of the second polarizer 32, and a transmission axis of the third polarizer 33 is perpendicular to a transmission axis of the second polarizer 32.
Preferably, a viewing angle compensation film is further disposed between the light modulation box 10 and the display box 20 to enhance the narrow viewing angle effect. Of course, the second polarizer 32 may also be a composite structure film of an APF film and a viewing angle compensation film, the composite structure film may have a polarization effect and a light reflection effect, and a bright surface of the composite structure film faces upward all the time, so that a narrow viewing angle effect may be further increased.
The color filter substrate 21 is provided with color resist layers 212 arranged in an array and a black matrix 211 separating the color resist layers 212, and the color resist layers 212 include color resist materials of three colors of red (R), green (G), and blue (B), and correspondingly form sub-pixels of three colors of red (R), green (G), and blue (B).
The array substrate 22 defines a plurality of pixel units on a side facing the second liquid crystal layer 23 by a plurality of scan lines and a plurality of data lines insulated from and crossing each other, a pixel electrode 222 and a thin film transistor are provided in each pixel unit, and the pixel electrode 222 is electrically connected to the data line of the adjacent thin film transistor through the thin film transistor. The thin film transistor includes a gate electrode, an active layer, a drain electrode, and a source electrode, the gate electrode and the scan line are located in the same layer and electrically connected, the gate electrode and the active layer are isolated by an insulating layer, the source electrode and the data line are electrically connected, and the drain electrode and the pixel electrode 222 are electrically connected through a contact hole.
As shown in fig. 1, in the present embodiment, a common electrode 221 is further disposed on a side of the array substrate 22 facing the second liquid crystal layer 23, and the common electrode 221 and the pixel electrode 222 are located on different layers and isolated from each other by an insulating layer. The common electrode 221 may be located above or below the pixel electrode 222 (the common electrode 221 is located below the pixel electrode 222 in fig. 1). Preferably, the common electrode 221 is a planar electrode disposed over the entire surface, and the pixel electrode 222 is a block electrode disposed in one block in each pixel unit or a slit electrode having a plurality of electrode bars to form a Fringe Field Switching (FFS) mode. Of course, In other embodiments, the pixel electrode 222 and the common electrode 221 may be located on the same layer, but they are insulated from each other, each of the pixel electrode 222 and the common electrode 221 may include a plurality of electrode strips, and the electrode strips of the pixel electrode 222 and the electrode strips of the common electrode 221 are alternately arranged to form an In-Plane Switching (IPS) mode; alternatively, in other embodiments, the array substrate 22 is provided with the pixel electrode 222 on a side facing the second liquid crystal layer 23, and the color filter substrate 21 is provided with the common electrode 221 on a side facing the second liquid crystal layer 23 to form a TN mode or a VA mode, and for other descriptions of the TN mode and the VA mode, reference is made to the prior art, and details are not repeated here.
The first substrate 11, the second substrate 12, the color filter substrate 21, and the array substrate 22 may be made of glass, acrylic, polycarbonate, or other materials. The material of the first viewing angle electrode 111, the second viewing angle electrode 121, the common electrode 221, and the pixel electrode 222 may be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), or the like.
In this embodiment, diffusion structure locates on second base plate 12, sets up on second base plate 12, and the visual effect of LOGO pattern is better under the narrow visual angle side view condition. The prism layer 122 and the dielectric layer 123 may be formed on the surface of the second substrate 12 by a mask process. Of course, the diffusion structure may also be disposed on the first substrate 11; or on the color filter substrate 21 or the array substrate 22.
The embodiment further provides a display device, which includes the display panel with switchable wide and narrow viewing angles, and a backlight module 40, where the backlight module 40 is used for providing a backlight source for the liquid crystal display device. Of course, if the display box 20 employs a self-luminous display, the display device does not need to be additionally provided with a backlight.
Preferably, the backlight module 40 adopts a Collimated Backlight (CBL) mode, which can receive light from the light source and ensure the display effect.
The backlight module 40 includes a backlight 41 and a privacy layer 43, and the privacy layer 43 is used to reduce the range of the light exit angle. A brightness enhancement film 42 is further arranged between the backlight 41 and the peep-proof layer 43, and the brightness enhancement film 42 increases the brightness of the backlight module 40. The peep-proof layer 43 is a micro louver structure, and can block light rays with a large incident angle, so that light rays with a small incident angle can pass through the peep-proof layer 43, and the angle range of the light rays passing through the peep-proof layer 43 is reduced. The peep-proof layer 43 includes a plurality of parallel arranged light resistance walls and a light hole between two adjacent light resistance walls, and light absorption materials are arranged on two sides of the light resistance walls. Of course, the backlight 41 may be a light collecting type backlight, so that the privacy protecting layer 43 is not required, but the light collecting type backlight is more expensive than the conventional backlight. The backlight module 40 may be a side-type backlight module or a direct-type backlight module.
Fig. 6 is a schematic plane view of the switchable wide and narrow viewing angle display device of the present invention, and fig. 7 is a schematic plane view of the switchable wide and narrow viewing angle display device of the present invention. Referring to fig. 6 and 7, the display device is provided with a viewing angle switching key 50 for a user to send a viewing angle switching request to the display device. The view switching key 50 may be a physical key (as shown in fig. 6), or may be a software control or application program (APP) to implement a switching function (as shown in fig. 7, for example, a wide view and a narrow view are set through a slider). When a user needs to switch between a wide viewing angle and a narrow viewing angle, a viewing angle switching request can be sent to the display device by operating the viewing angle switching key 50, and finally the driving chip 60 controls the electric signals applied to the first viewing angle electrode 111 and the second viewing angle electrode 121, so that the display device can realize the switching between the wide viewing angle and the narrow viewing angle.
FIG. 8 is a schematic view of a process for fabricating a diffusion structure according to the present invention.
As shown in fig. 8, in this embodiment, the diffusion structure is disposed on the second substrate 12 of the light modulation box 10 as an example, but the invention is not limited thereto.
S1: coating the entire surface of the second substrate 12 with the PV layer 14;
s2: coating a photoresist layer 15 on the whole surface of the PV layer;
s3: exposing the photoresist layer 15 through a mask 16, wherein the mask 16 does not transmit light at the position corresponding to the diffusion structure;
s4: developing, wherein the photoresist layer 15 at the position except the diffusion structure is retained, and the photoresist layer 15 at other positions on the PV layer 14 is completely removed;
s5: etching the PV layer 14, wherein the PVC layer 14 is completely removed except the PVC layer 14 covered by the photoresist layer 15, and the PVC layer 14 at other positions on the substrate 12 is completely removed;
s6: stripping the photoresist layer 15 overlying the PV layer 14 to form a prism layer 122 of the diffusion structure;
s7: a dielectric layer 123 is formed on the substrate 12 overlying the prism layer 122 to form a diffusion structure.
In this document, the terms of upper, lower, left, right, front, rear and the like are used to define the positions of the structures in the drawings and the positions of the structures 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. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A switchable wide and narrow viewing angle display panel, the display panel being capable of switching between a wide viewing angle and a narrow viewing angle, the display panel having a display area (100) and a non-display area (200) located at a peripheral edge of the display area (100), the display area (100) comprising a patterned diffusion area (110) and a non-diffusion area (120), the diffusion area (110) having a higher light scattering ability than the non-diffusion area (120).
2. The switchable wide and narrow viewing angle display panel of claim 1, wherein the display panel is provided with a diffusion structure corresponding to the diffusion region (110), and the diffusion structure can scatter light passing through the diffusion structure.
3. The switchable wide and narrow viewing angle display panel of claim 2, wherein the diffusion structure comprises a prism layer (122) and a dielectric layer (123) stacked on the prism layer (122), the dielectric layer (123) is disposed on an upper surface of the prism layer (122), and a refractive index of the prism layer (122) is greater than a refractive index of the dielectric layer (123); or the dielectric layer (123) is arranged on the lower surface of the prism layer (122), and the refractive index of the prism layer (122) is smaller than that of the dielectric layer (123).
4. A switchable wide and narrow viewing angle display panel according to any of claims 1 to 3, wherein the display panel comprises a light modulating cell (10) and a display cell (20) arranged one above the other;
the dimming box (10) comprises a first substrate (11), a second substrate (12) and a first liquid crystal layer (13), wherein the second substrate (12) is arranged opposite to the first substrate (11), the first liquid crystal layer (13) is arranged between the first substrate (11) and the second substrate (12), a first visual angle electrode (111) is arranged on one side, facing the first liquid crystal layer (13), of the first substrate (11), and a second visual angle electrode (121) matched with the first visual angle electrode (111) is arranged on one side, facing the first liquid crystal layer (13), of the second substrate (12);
the display box (20) comprises a color film substrate (21), an array substrate (22) arranged opposite to the color film substrate (21), and a second liquid crystal layer (23) arranged between the color film substrate (21) and the array substrate (22).
5. The switchable wide and narrow viewing angle display panel of claim 4, wherein the diffusion structure is disposed on the first substrate (11); or, the diffusion structure is arranged on the second substrate (12).
6. The switchable display panel of claim 4, wherein a first polarizer (31) is disposed on a side of the light modulation box (10) away from the display box (20), a second polarizer (32) is disposed between the light modulation box (10) and the display box (20), a third polarizer (33) is disposed on a side of the display box (20) away from the light modulation box (10), a transmission axis of the first polarizer (31) is parallel to a transmission axis of the second polarizer (32), and a transmission axis of the third polarizer (33) is perpendicular to a transmission axis of the second polarizer (32).
7. The switchable wide and narrow viewing angle display panel of claim 6, wherein a viewing angle compensation film is further disposed between the light modulation cell (10) and the display cell (20), and/or the second polarizer (32) is a composite structure film of an APF film and the viewing angle compensation film.
8. The switchable wide and narrow viewing angle display panel of claim 1 or 2, wherein the display panel is provided with a light-gathering structure corresponding to the non-diffusion region (120), and the light-gathering structure can gather light passing through the light-gathering structure.
9. The switchable wide and narrow viewing angle display panel of claim 1, wherein the diffusion region (110) is located at the center of the display region (100), and the non-diffusion region (120) surrounds the periphery of the diffusion region (110).
10. A display device comprising the switchable wide and narrow viewing angle display panel according to any one of claims 1 to 9.
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| CN202210275828.2A CN114594622B (en) | 2022-03-21 | 2022-03-21 | Display panel with switchable wide and narrow viewing angles and display device |
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| CN114942535A (en) * | 2022-06-29 | 2022-08-26 | 昆山龙腾光电股份有限公司 | Display device with switchable wide and narrow viewing angles and driving method |
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| CN112987349A (en) * | 2021-02-09 | 2021-06-18 | 昆山龙腾光电股份有限公司 | Display panel with switchable wide and narrow viewing angles, manufacturing method and display device |
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| CN114942535B (en) * | 2022-06-29 | 2023-07-25 | 昆山龙腾光电股份有限公司 | Display device with switchable wide and narrow viewing angles and driving method |
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| CN114594622B (en) | 2023-07-25 |
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