CN111679466A - Display panel with switchable viewing angles, display device and viewing angle switching method - Google Patents

Abstract

The invention discloses a display panel with switchable visual angles, a display device and a visual angle switching method, wherein the display panel comprises a display liquid crystal box and a dimming box, the display liquid crystal box comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a liquid crystal layer positioned between the color film substrate and the array substrate, the color film substrate is provided with a color resistance layer corresponding to a pixel unit and a black matrix for separating the color resistance layer, the dimming box comprises polymer light dispersion liquid and dimming electrodes corresponding to the black matrix, a plurality of accommodating chambers for accommodating the polymer light dispersion liquid are arranged in the dimming box, the accommodating chambers correspond to the pixel unit one by one, the polymer light dispersion liquid comprises a carrier liquid and quantum dots with charged groups, and the quantum dots are dispersed in the carrier liquid; in the wide visual angle mode, no electric signal is applied to the light modulation electrode, and at the moment, the quantum dots are dispersed in the carrier liquid; in the narrow viewing angle mode, a preset electrical signal is applied to the dimming electrode, and at this time, the quantum dots are adsorbed on the surface of the dimming electrode.

Description

Display panel with switchable viewing angles, display device and viewing angle switching method

Technical Field

The invention relates to the technical field of capacitor processing, in particular to a display panel with switchable viewing angles, a display device and a viewing angle switching method.

Background

With the continuous progress of the liquid crystal display technology, the viewing 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 brought by a large viewing angle, so as to avoid business loss or embarrassment caused by the leakage of screen information.

Present display device develops towards the direction of wide visual angle gradually, no matter cell-phone mobile terminal uses, desktop display or notebook computer uses, people bring visual experience in enjoying the wide visual angle, also hope to avoid under some application scenes that all visual angles can all watch the display content, just need the display to switch into narrow visual angle to use this moment, still need display device to possess the function of wide visual angle and narrow visual angle switching each other in many occasions.

At present, the switching between a wide visual angle and a narrow visual angle is realized by mainly attaching a shutter shielding film on a display screen, and when peep prevention is needed, the visual angle can be reduced by shielding the screen by using the shutter shielding film. However, this method requires additional preparation of the louver films, which causes great inconvenience to the user, and one louver film can only realize one viewing angle, and once the louver films are attached, the viewing angle is fixed in the narrow viewing angle mode.

Disclosure of Invention

In order to overcome the disadvantages and shortcomings of the prior art, an object of the present invention is to provide a display panel, a display device and a method for switching a viewing angle, which are switchable between a wide viewing angle and a narrow viewing angle.

The purpose of the invention is realized by the following technical scheme:

the invention provides a display panel with switchable visual angles, which comprises a display liquid crystal box and a dimming box, wherein the display liquid crystal box comprises a color film substrate, an array substrate arranged opposite to the color film substrate and a liquid crystal layer positioned between the color film substrate and the array substrate, the color film substrate is provided with a color resistance layer corresponding to a pixel unit and a black matrix separating the color resistance layer, the dimming box comprises polymer light dispersion liquid and dimming electrodes corresponding to the black matrix, a plurality of accommodating chambers for accommodating the polymer light dispersion liquid are arranged in the dimming box, the accommodating chambers correspond to the pixel unit one by one, the polymer light dispersion liquid comprises a carrying liquid and quantum dots with charged groups, and the quantum dots are dispersed in the carrying liquid;

in the wide visual angle mode, no electric signal is applied to the dimming electrode, and at the moment, the quantum dots are dispersed in the carrier liquid;

in the narrow viewing angle mode, a preset electric signal is applied to the dimming electrode, and at this time, the quantum dots are adsorbed on the surface of the dimming electrode.

Furthermore, the light modulation box comprises a first substrate, the first substrate is arranged on one side of the light modulation box, which is far away from the display liquid crystal box, and the polymer light dispersion liquid, the accommodating chamber and the light modulation electrode are arranged between the first substrate and the color film substrate; or, an upper polarizer is arranged on one side of the dimming box, which is far away from the display liquid crystal box, and the polymer light dispersion liquid, the accommodating chamber and the dimming electrode are arranged between the upper polarizer and the color film substrate.

Further, the color resistance layer comprises a red color resistance layer, a green color resistance layer and a blue color resistance layer, the quantum dots comprise red quantum dots, green quantum dots and blue quantum dots, the polymer light dispersion liquid with the red quantum dots corresponds to the red color resistance layer, the polymer light dispersion liquid with the green quantum dots corresponds to the green color resistance layer, the polymer light dispersion liquid with the blue quantum dots corresponds to the blue color resistance layer, the red quantum dots can excite red light, the green quantum dots can excite green light, and the blue quantum dots can excite blue light.

Further, the light modulation electrode is of a net structure and has the same pattern as the black matrix.

Further, the dimming electrode comprises a first electrode part and a second electrode part which are insulated from each other, the first electrode part comprises a plurality of first electrode strips, the second electrode part comprises a plurality of second electrode strips, and the extension directions of the first electrode strips and the second electrode strips are parallel to each other.

Further, the first electrode part further includes a first conductive part that electrically connects the plurality of first electrode strips, and the second electrode part further includes a second conductive part that electrically connects the plurality of second electrode strips.

Further, the width of the light modulation electrode strip is less than that of the black matrix strip.

Furthermore, a prism layer with a light-gathering effect is arranged on the array substrate, or/and a peep-proof layer for reducing the light emission angle range is arranged on one side of the array substrate, which is far away from the liquid crystal layer.

The invention also provides a display device which comprises the display panel with switchable viewing angles.

The invention also provides a method for switching the visual angle of the display device, which comprises the display device, wherein the method for switching the visual angle comprises the following steps: in the wide visual angle mode, no electric signal is applied to the dimming electrode, and at the moment, the quantum dots are dispersed in the carrier liquid; in the narrow viewing angle mode, a preset electric signal is applied to the dimming electrode, and at this time, the quantum dots are adsorbed on the surface of the dimming electrode.

The invention has the beneficial effects that: when wide visual angle mode, do not exert the signal of telecommunication on the accent optical pole, at this moment, quantum dot dispersion is in bearing liquid, the light that the quantum dot was aroused is the disperse state, thereby display panel is wide visual angle, when narrow visual angle mode, exert preset signal of telecommunication on the accent optical pole, because charged group has on the quantum dot, at this moment, the quantum dot can be adsorbed on the surface of adjusting optical pole, so the accommodation chamber middle part is transparent state and does not have the quantum dot interference, the collimation light that passes the display liquid crystal box from backlight unit directly jets out from adjusting optical box, thereby display panel is narrow visual angle. The display panel can be switched between a wide viewing angle and a narrow viewing angle by controlling the dimming electrode to apply a preset electric signal.

Drawings

Fig. 1 is a schematic structural diagram of a display panel with switchable viewing angles according to a first embodiment of the present invention;

fig. 2 is a schematic plan structure diagram of a color film substrate according to a first embodiment of the present invention;

FIG. 3 is a schematic plan view of a light-adjusting box according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a display panel with switchable viewing angles in a wide viewing angle mode according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a switchable viewing angle display panel in a narrow viewing angle mode according to an embodiment of the present invention;

FIG. 6 is a schematic plan view of a light-adjusting box according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a display panel with switchable viewing angles according to a third embodiment of the present invention;

fig. 8 is a schematic structural diagram of a display panel with switchable viewing angles according to a fourth embodiment of the present invention;

fig. 9 is a schematic structural diagram of a display panel with switchable viewing angles according to a fifth embodiment of the present invention;

FIG. 10 is a schematic plan view of a display device according to the present invention;

FIG. 11 is a second schematic plan view of the display device of 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 of the embodiments, structures, features and effects of the display panel and the display device with switchable viewing angles according to the present invention with reference to the accompanying drawings and the preferred embodiments is as follows:

[ example one ]

Fig. 1 is a schematic structural diagram of a display panel with switchable viewing angles in a first embodiment of the present invention, fig. 2 is a schematic structural diagram of a color film substrate in the first embodiment of the present invention, fig. 3 is a schematic structural diagram of a light modulation box in the first embodiment of the present invention, fig. 4 is a schematic structural diagram of the display panel with switchable viewing angles in a wide viewing angle mode in the first embodiment of the present invention, and fig. 5 is a schematic structural diagram of the display panel with switchable viewing angles in a narrow viewing angle mode in the first embodiment of the present invention.

As shown in fig. 1 to fig. 5, a display panel with switchable viewing angles according to an embodiment of the present invention includes a display liquid crystal cell and a light modulation cell, which are overlapped with each other, wherein the display liquid crystal cell is used for controlling normal display, and the light modulation cell is used for controlling wide and narrow viewing angle switching.

The display liquid crystal cell includes a color filter substrate 10, an array substrate 20 disposed opposite to the color filter substrate 10, and a liquid crystal layer 30 located between the color filter substrate 10 and the array substrate 20. The color film substrate 10 is provided with a color resistance layer 12 corresponding to the pixel units SP and a black matrix 11 for spacing the color resistance layer 12, the light modulation box comprises a polymer light dispersion liquid and light modulation electrodes 41 corresponding to the black matrix 11, a plurality of accommodating chambers 401 (fig. 5) for accommodating the polymer light dispersion liquid are arranged in the light modulation box, the accommodating chambers 401 correspond to the pixel units SP one by one, the polymer light dispersion liquid comprises a carrier liquid and quantum dots 42 with charged groups, and the quantum dots 42 are dispersed in the carrier liquid.

As shown in fig. 4, in the wide viewing angle mode, no electrical signal is applied to the light modulation electrode 41, and at this time, the quantum dots 42 are dispersed in the carrier liquid;

as shown in fig. 5, in the narrow viewing angle mode, a preset electrical signal is applied to the dimming electrode 41, and at this time, the quantum dots 42 are adsorbed on the surface of the dimming electrode 41, so that the accommodating chamber 401 is in a transparent state without interference of the quantum dots 42.

The carrier liquid is a mixture of an organic solvent and additives such as a stabilizer, and the organic solvent is an alcohol ether solvent, such as ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monopropyl ether, diethylene glycol methyl ethyl ether, methyl ethyl ketone, methyl isobutyl ketone and other solvents which do not react with the quantum dots. The material of the group can be a group with metal ions or a polar group, and only the group capable of moving in an electric field is needed.

In this embodiment, the light modulation cell includes a first substrate 43 and a second substrate 44, the first substrate 43 is disposed on a side of the light modulation cell away from the display liquid crystal cell, the second substrate 44 is disposed on a side of the light modulation cell close to the display liquid crystal cell, and the polymer light dispersion liquid, the housing chamber 401 and the light modulation electrode 41 are disposed between the first substrate 43 and the second substrate 44. In other embodiments, the side of the light modulation cell away from the display liquid crystal cell is provided with the upper polarizer 51, and the polymer light dispersion, the accommodating chamber 401 and the light modulation electrode 41 are provided between the upper polarizer 51 and the second substrate 44, so that the first substrate 43 is not required to be provided to reduce the cell thickness. Alternatively, the polymer light dispersion liquid, the containing chamber 401, and the light control electrode 41 are provided between the first substrate 43 and the color filter substrate 10, so that the second substrate 44 is not required to be provided, thereby reducing the cell thickness. Further alternatively, the polymer light dispersion liquid, the accommodating chamber 401 and the light control electrode 41 are disposed between the upper polarizer 51 and the color filter substrate 10, so that the first substrate 43 and the second substrate 44 are not required to be disposed, thereby reducing the box thickness.

In this embodiment, the light adjustment electrode 41 has a mesh structure and has the same pattern as the black matrix 11. The light control electrode 41 has a plurality of electrode strips crossing in the horizontal and vertical directions, the black matrix 11 has a plurality of black matrix strips crossing in the horizontal and vertical directions, and the width of the electrode strips of the light control electrode 41 is smaller than the width of the black matrix strips of the black matrix 11. The housing chamber 401 for housing the polymer light dispersion liquid is defined in shape by the mesh-structured dimming electrode 41 to avoid mixing of different quantum dots 42 with each other, specifically, a gap is provided between the first substrate 43 and the second substrate 44, and the mesh-structured dimming electrode 41 divides the gap into a plurality of housing chambers 401 independent from each other to house the different quantum dots 42.

Further, the charged group on the quantum dot 42 may be a positively charged group, in the narrow viewing angle mode, the light modulation electrode 41 needs to be connected to the negative electrode of the power supply, and the positively charged group brings the quantum dot 42 to the light modulation electrode 41 and adheres to the surface of the light modulation electrode 41, and when the viewing angle needs to be switched to the wide viewing angle mode, no electric signal is applied to the light modulation electrode 41, and the quantum dot 42 is separated from the surface of the light modulation electrode 41 and dispersed in the carrier liquid, so as to recover the initial state. Of course, the charged group on the quantum dot 42 may be a negatively charged group, and in the narrow viewing angle mode, the light modulation electrode 41 needs to be connected to the positive electrode of the power supply.

In this embodiment, the color resist layer 12 includes a red color resist layer 121, a green color resist layer 122, and a blue color resist layer 123, and respectively corresponds to the red sub-pixel, the green sub-pixel, and the blue sub-pixel. The quantum dots 42 include red quantum dots 421, green quantum dots 422, and blue quantum dots 423, the polymer light dispersion with the red quantum dots 421 corresponds to the red color barrier layer 121, the polymer light dispersion with the green quantum dots 422 corresponds to the green color barrier layer 122, the polymer light dispersion with the blue quantum dots 423 corresponds to the blue color barrier layer 123, the red quantum dots 421 can excite red light, the green quantum dots 422 can excite green light, and the blue quantum dots 423 can excite blue light. Of course, in other embodiments, the colors of the quantum dots and the color resistance layer may not correspond, but each of the quantum dots and the color resistance layer needs to be driven by one driver at a wide viewing angle and a narrow viewing angle.

Further, the size of the red quantum dots 421 is 3nm to 3.5 nm; the size of the green quantum dots 422 is 2 nm-3 nm; the size of the blue quantum dots 423 is 1.5 nm-2 nm. That is to say, the red quantum dot 421, the green quantum dot 422 and the blue quantum dot 423 have different sizes, and the size effect and the stokes spectrum shift effect of the quantum dots are utilized, so that the red quantum dot 421 can absorb light with light energy greater than that of red light emitted by the light source, convert the light into monochromatic red light and emit the monochromatic red light, and the color of the red light in the red sub-pixel becomes purer; the green quantum dots 422 can absorb light with light energy greater than that of green light, convert the light into monochromatic green light and emit the monochromatic green light, and the green light color in the green sub-pixel becomes purer; the blue quantum dots 423 can absorb light emitted by the light source with light energy greater than that of the blue light, convert the light into monochromatic blue light, and emit the monochromatic blue light, so that the blue light color in the blue sub-pixel becomes purer.

The Quantum Dot (QD for short) is a nanoparticle composed of II-Vl or III-V elements, and has a size smaller than or close to the exciton bohr radius (generally, the diameter is not more than 10nm), and has an obvious Quantum effect. It is generally considered a quasi-zero-dimensional material, a semiconducting nanostructure that binds conduction band electrons, valence band holes, and excitons in three spatial directions. When the particle size of the nanomaterial is reduced to a certain value (generally below 10nm), the electronic energy level near the metal fermi level is changed from quasi-continuous to discrete energy level, and the energy gap of the discontinuous highest occupied molecular orbital and lowest unoccupied molecular orbital levels of the nano-semiconductor particles is widened, thereby causing blue shift of absorption and fluorescence spectrum peaks, which is called quantum size effect. The quantum size effect causes great change of the photoelectric property of the semiconductor quantum dot, and the quantum size effect generated when the size of the semiconductor quantum dot particle is smaller than the bohr radius of the exciton changes the energy level structure of the semiconductor material, so that the semiconductor material is converted from a continuous energy band structure into a discrete energy level structure with molecular characteristics. By utilizing the phenomenon, semiconductor quantum dots with different particle sizes can be prepared in the same reaction to generate light emission with different frequencies, so that various light emitting colors can be conveniently regulated and controlled. The solid absorbs photons (absorbs) with a higher energy than the radiation photons (emits light), and therefore the emission spectrum is shifted in the lower energy direction (red-shifted) compared to the absorption spectrum, and the difference between the two photon energies is called the Stokes Shift.

The quantum dots have narrow emission spectrum and high luminous efficiency, and have quantum size effect and stokes spectrum shift effect, so that the corresponding quantum dots in the sub-pixels of each color can absorb the light with the energy larger than the color energy of the sub-pixel units in the light emitted by the backlight source, and efficiently convert the absorbed light into monochromatic light of the colors of the sub-pixel units and emit the monochromatic light, so that the corresponding colors of the sub-pixels of the colors are purer, the saturation is higher, and the transmittance of the backlight source can be improved.

In this embodiment, positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy, are used in the liquid crystal layer 30, as shown in fig. 1, in an initial state, the positive liquid crystal molecules in the liquid crystal layer 30 are aligned parallel to the color filter substrate 10 and the array substrate 20, and the alignment directions of the positive liquid crystal molecules near the color filter substrate 10 and the positive liquid crystal molecules near the array substrate 20 are antiparallel.

The array substrate 20 is defined by a plurality of scanning lines and a plurality of data lines which are insulated from each other and crossed to form a plurality of pixel units on one side facing the liquid crystal layer 30, the black matrix 11 is vertically corresponding to the scanning lines and the data lines, a pixel electrode 25 and a thin film transistor are arranged in each pixel unit, and the pixel electrode 25 is electrically connected with the data lines of the adjacent thin film transistors through the thin film transistors. 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 25 are electrically connected through a contact hole.

In this embodiment, a common electrode 23 is further disposed on a side of the array substrate 20 facing the liquid crystal layer 30, and the common electrode 23 and the pixel electrode 25 are located on different layers and insulated and isolated by an insulating layer 24. The common electrode 23 may be located above or below the pixel electrode 25 (the common electrode 23 is shown below the pixel electrode 25 in fig. 1). Preferably, the common electrode 23 is a planar electrode disposed over the entire surface, and the pixel electrode 25 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 25 and the common electrode 24 are located In the same layer, but they are insulated and isolated from each other, each of the pixel electrode 25 and the common electrode 24 may include a plurality of electrode stripes, and the electrode stripes of the pixel electrode 25 and the electrode stripes of the common electrode 23 are alternately arranged to form an In-Plane Switching (IPS) mode; alternatively, in other embodiments, the array substrate 20 is provided with the pixel electrode 25 on a side facing the liquid crystal layer 30, and the color filter substrate 10 is provided with the common electrode 23 on a side facing the liquid crystal layer 30 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.

Further, the array substrate 20 is provided with a prism layer 21 having a light-condensing effect on a side facing the liquid crystal layer 30, the prism layer 21 directly covers a surface of the array substrate 20, the prism layer 21 has a plurality of ribs protruding toward the liquid crystal layer 30, and the prism layer 21 may be formed by etching a planarization layer material (OC). The prism layer 21 is further covered with a refraction layer 22, and the refractive index of the prism layer 21 is smaller than that of the refraction layer 22, so that the light condensation effect is enhanced, and light emitted by the backlight source is collimated. Of course, the prism layer 21 may be directly formed into a hollow structure without covering the refraction layer 22, but this increases the difficulty of the subsequent manufacturing process.

Further, an upper polarizer 51 is disposed on the color filter substrate 10, the upper polarizer 51 covers the first substrate 43, a lower polarizer 52 is disposed on the array substrate 20, and a transmission axis of the upper polarizer 51 is perpendicular to a transmission axis of the lower polarizer 52.

The backlight module 60 is disposed on a side of the display liquid crystal box away from the dimming, and the backlight module 60 may be a direct type backlight source or a side type backlight source.

In other embodiments, a shielding electrode may be further disposed on a side of the color filter substrate 10 facing the liquid crystal layer 30, and the shielding electrode is used to shield interference of an external signal to the liquid crystal layer 30, so as to enhance display quality.

The color filter substrate 10, the array substrate 20, the first substrate 43, and the second substrate 44 may be made of glass, acrylic, polycarbonate, and the like. The material of the light modulation electrode 41, the common electrode 21, and the pixel electrode 23 may be a transparent electrode such as Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO).

[ example two ]

Fig. 6 is a schematic plan view of a light modulation box according to a second embodiment of the present invention. As shown in fig. 6, the display panel with switchable viewing angles provided by the second embodiment of the present invention is substantially the same as the display panel with switchable viewing angles provided by the first embodiment (fig. 1 to 5), except that, in this embodiment, the light modulation electrode 41 includes a first electrode portion 411 and a second electrode portion 412 that are insulated from each other, both the first electrode portion 411 and the second electrode portion 412 are comb-shaped electrodes, the first electrode portion 411 includes a plurality of first electrode strips 411a and a first conductive portion 411b that electrically connects the plurality of first electrode strips 411a, the second electrode portion 412 includes a plurality of second electrode strips 412a and a second conductive portion 412b that electrically connects the plurality of second electrode strips 412a, the extending directions of the first electrode strips 411a and the second electrode strips 412a are parallel to each other, the extending directions of the first conductive portion 411b and the first electrode strips 411a are perpendicular to each other, and the extending directions of the second conductive portion 412b and the second electrode strips 412a are perpendicular to each other.

Further, the light modulation box is further provided with a spacing bar 45 positioned on the same layer as the light modulation electrode 41, the spacing bar 45 is perpendicular to the extending direction of the first electrode bar 411a and the second electrode bar 412a, the spacing bar 45 corresponds to the black matrix 11, and the spacing bar 45, the first electrode bar 411a and the second electrode bar 412 jointly divide the gap between the first substrate 43 and the second substrate 44 into a plurality of mutually independent accommodating chambers 401 so as to accommodate different quantum dots 42.

In the wide viewing angle mode, no electrical signal is applied to the first electrode strips 411a and the second electrode strips 412a of the light modulation electrode 41, and at this time, the quantum dots 42 are dispersed in the carrier liquid;

in the narrow viewing angle mode, electrical signals with opposite polarities are applied to the first electrode bar 411a and the second electrode bar 412a, and at this time, the first electrode bar 411a and the second electrode bar 412a form a certain electric field, the quantum dot 42 with the charged group moves in the electric field and is adsorbed on the surface of one of the electrode bars, and the quantum dot 42 with the charged group is far away from the other electrode bar.

Compared with the first embodiment, in the present embodiment, the quantum dots 42 are driven by the first electrode stripes 411a and the second electrode stripes 412a together to move, so that the moving speed of the quantum dots 42 can be increased, that is, the response time of the wide and narrow viewing angles can be shortened.

It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.

[ third example ]

Fig. 7 is a schematic structural diagram of a display panel with switchable viewing angles according to a third embodiment of the present invention. As shown in fig. 7, the display panel with switchable viewing angles according to the third embodiment of the present invention is substantially the same as the display panel with switchable viewing angles according to the first embodiment (fig. 1 to 5), except that in this embodiment, a privacy-improving layer 70 for reducing the range of the light-emitting angle is disposed on a side of the array substrate 20 away from the liquid crystal layer 30, the privacy-improving layer 70 is disposed between the backlight module 60 and the display liquid crystal cell, and the privacy-improving layer 70 is used for reducing the range of the light-emitting angle. The peep-proof layer 70 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 70, and the angle range of the light rays passing through the peep-proof layer 70 is reduced. The first peep-proof layer 70 includes a plurality of parallel arranged photoresist walls and a light hole between two adjacent photoresist walls, and light absorbing materials are disposed on two sides of the photoresist walls.

In other embodiments, the privacy protection layer 70 may be disposed only between the backlight module 60 and the display liquid crystal cell, and the prism layer 21 is not required.

In another embodiment, the light modulation electrode includes a first electrode portion and a second electrode portion that are insulated from each other, and both the first electrode portion and the second electrode portion are comb-shaped electrodes, as described with reference to the second embodiment.

Compared with the first embodiment, in the present embodiment, the prism layer 21 and the peep-proof layer 70 are commonly used to reduce the range of the light emitting angle, so that the effect of narrow viewing angle can be enhanced.

It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.

[ example four ]

Fig. 8 is a schematic structural diagram of a display panel with switchable viewing angles according to a fourth embodiment of the present invention. As shown in fig. 8, the display panel with switchable viewing angles according to the fourth embodiment of the present invention is substantially the same as the display panel with switchable viewing angles according to the first embodiment (fig. 1 to fig. 5), except that in this embodiment, a shielding electrode 13 is further disposed on a side of the color film substrate 10 facing the liquid crystal layer 30, and the light modulation box is disposed on a side of the shielding electrode 13 facing the liquid crystal layer 30, that is, the light modulation box is disposed inside the display liquid crystal box. The shielding electrode 13 is used to shield the interference of external signals to the light modulating cell and the liquid crystal layer 30, so as to enhance the display image quality.

In another embodiment, the light modulation electrode includes a first electrode portion and a second electrode portion that are insulated from each other, and both the first electrode portion and the second electrode portion are comb-shaped electrodes, as described with reference to the second embodiment. An anti-peeping layer for reducing the light emitting angle range is disposed on a side of the array substrate away from the liquid crystal layer, and the anti-peeping layer is disposed between the backlight module and the display liquid crystal cell.

Compared with the first embodiment, the dimming box is arranged inside the display liquid crystal box, so that the damage of the dimming box caused by the collision of the display panel is avoided.

It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.

[ example five ]

Fig. 9 is a schematic structural diagram of a display panel with switchable viewing angles in a fifth embodiment of the present invention. As shown in fig. 9, the display panel with switchable viewing angle according to the fifth embodiment of the present invention is substantially the same as the display panel with switchable viewing angle according to the first embodiment (fig. 1 to fig. 5), except that in this embodiment, a shielding electrode 13 is further disposed on a side of the color film substrate 10 facing the liquid crystal layer 30, and the light modulation box is disposed between the shielding electrode 13 and the color resistance layer 12, that is, the light modulation box is disposed inside the display liquid crystal box. The shielding electrode 13 is used for shielding the interference of the external signal to the liquid crystal layer 30 and the mutual interference between the array substrate 20 and the light modulation box, so as to enhance the display image quality.

In another embodiment, the light modulation electrode includes a first electrode portion and a second electrode portion that are insulated from each other, and both the first electrode portion and the second electrode portion are comb-shaped electrodes, as described with reference to the second embodiment. An anti-peeping layer for reducing the light emitting angle range is disposed on a side of the array substrate away from the liquid crystal layer, and the anti-peeping layer is disposed between the backlight module and the display liquid crystal cell.

Compared with the first embodiment, the dimming box is arranged inside the display liquid crystal box, so that the damage of the dimming box caused by the collision of the display panel is avoided.

It should be understood by those skilled in the art that the rest of the structure and the operation principle of the present embodiment are the same as those of the first embodiment, and are not described herein again.

The invention also provides a display device which comprises the display panel with switchable viewing angles.

Fig. 10 and 11 are schematic plan views illustrating a display device according to an embodiment of the present invention, and referring to fig. 10 and 11, the display device is provided with a viewing angle switching key 80 for a user to send a viewing angle switching request to the display device. The view switching key 80 may be a physical key (as shown in fig. 10), or may be a software control or application program (APP) to implement a switching function (as shown in fig. 11, for example, a wide view and a narrow view are set by a slider). When a user needs to switch between a wide visual angle and a narrow visual angle, a visual angle switching request can be sent to the display device by operating the visual angle switching key 80, and finally the driving chip 90 controls and applies an electric signal on the dimming electrode to enable the quantum dots to be gathered on the surface of the dimming electrode or dispersed in the carrier liquid.

The invention also provides a method for switching the visual angle of the display device, which comprises the display device, wherein the method for switching the visual angle comprises the following steps: in the wide visual angle mode, no electric signal is applied to the dimming electrode, and at the moment, the quantum dots are dispersed in the carrier liquid; in the narrow visual angle mode, a preset electric signal is applied to the dimming electrode, and at the moment, the quantum dots are adsorbed on the surface of the dimming electrode, so that the accommodating chamber is in a transparent state and has no quantum dot interference.

In an embodiment, the charged group on the quantum dot may be a group with positive charge, when the viewing angle mode is narrow, the light modulation electrode needs to be connected to the negative electrode of the power supply, and the group with positive charge brings the quantum dot to approach the light modulation electrode and is adsorbed on the surface of the light modulation electrode. At this time, the quantum dots are adsorbed on the surfaces of the first electrode strips and the second electrode strips, so that the accommodating chamber is in a transparent state and has no quantum dot interference. Certainly, the charged group on the quantum dot may be a negatively charged group, and in the narrow viewing angle mode, the light modulation electrode needs to be connected to the positive electrode of the power supply.

In other embodiments, the light modulation electrode includes a first electrode portion and a second electrode portion insulated from each other, the first electrode portion and the second electrode portion are both comb-shaped electrodes, and the extending directions of the first electrode strips and the second electrode strips are parallel to each other. In a wide view angle mode, no electric signal is applied to the first electrode strip and the second electrode strip of the dimming electrode, and at the moment, the quantum dots are dispersed in the carrier liquid; when in a narrow viewing angle mode, electric signals with opposite polarities are applied to the first electrode strip and the second electrode strip, at the moment, a certain electric field is formed by the first electrode strip and the second electrode strip, the quantum dots with the charged groups move in the electric field and are adsorbed on the surface of one electrode strip, and the quantum dots with the charged groups are far away from the other electrode strip. At this time, the quantum dots are adsorbed on the surfaces of the first electrode strips and the second electrode strips, so that the accommodating chamber is in a transparent state and has no quantum dot interference. In the embodiment, the quantum dots are driven to move by the first electrode strips and the second electrode strips together, so that the moving speed of the quantum dots can be increased, namely, the response time of switching between the wide and narrow viewing angles is shortened.

In this document, the terms upper, lower, left, right, front, rear and the like are used for defining the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the clarity and convenience of the 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 display panel with switchable visual angles is characterized by comprising a display liquid crystal box and a dimming box, wherein the display liquid crystal box comprises a color film substrate (10), an array substrate (20) arranged opposite to the color film substrate (10) and a liquid crystal layer (30) arranged between the color film substrate (10) and the array substrate (20), a color resistance layer (12) corresponding to a pixel unit (SP) and a black matrix (11) for spacing the color resistance layer (12) are arranged on the color film substrate (10), the dimming box comprises polymer light dispersion liquid and dimming electrodes (41) corresponding to the black matrix (11), a plurality of containing chambers (401) for containing the polymer light dispersion liquid are arranged in the dimming box, the containing chambers (401) correspond to the pixel unit (SP) one by one, the polymer light dispersion liquid comprises a bearing liquid and quantum dots (42) with charged groups, the quantum dots (42) are dispersed in the carrier liquid;

in the wide view angle mode, no electric signal is applied to the light adjusting electrode (41), and at the moment, the quantum dots (42) are dispersed in the carrier liquid;

in the narrow viewing angle mode, a preset electric signal is applied to the dimming electrode (41), and at the same time, the quantum dots (42) are adsorbed on the surface of the dimming electrode (41).

2. The switchable viewing angle display panel of claim 1, wherein the light modulation cell comprises a first substrate (43), the first substrate (43) is disposed on a side of the light modulation cell away from the display liquid crystal cell, and the polymer light dispersion, the accommodating chamber (401) and the light modulation electrode (41) are disposed between the first substrate (43) and the color filter substrate (10); or an upper polarizer (51) is arranged on one side of the dimming box, which is far away from the display liquid crystal box, and the polymer light dispersion liquid, the accommodating chamber (401) and the dimming electrode (41) are arranged between the upper polarizer (51) and the color film substrate (10).

3. A switchable viewing angle display panel according to claim 1, wherein the color barrier layer (12) comprises a red color barrier layer (121), a green color barrier layer (122) and a blue color barrier layer (123), the quantum dots (42) comprise red quantum dots (421), green quantum dots (422) and blue quantum dots (423), the polymer light dispersion with the red quantum dots (421) corresponds to the red color barrier layer (121), the polymer light dispersion with the green quantum dots (422) corresponds to the green color barrier layer (122), the polymer light dispersion with the blue quantum dots (423) corresponds to the blue color barrier layer (123), the red quantum dots (421) can excite red light, the green quantum dots (422) can excite green light, and the blue quantum dots (423) can excite blue light.

4. A display panel with switchable viewing angles according to claim 1, wherein the dimming electrode (41) is a mesh structure and has the same pattern as the black matrix (11).

5. A display panel switchable between viewing angles according to claim 1, wherein the dimming electrode (41) comprises a first electrode portion (411) and a second electrode portion (412) insulated from each other, the first electrode portion (411) comprises a plurality of first electrode bars (411a), the second electrode portion (412) comprises a plurality of second electrode bars (412a), and the extension directions of the first electrode bars (411a) and the second electrode bars (412a) are parallel to each other.

6. The switchable viewing angle display panel of claim 5, wherein the first electrode portion (411) further comprises a first conductive portion (411b) for electrically connecting a plurality of the first electrode bars (411a), and the second electrode portion (412) further comprises a second conductive portion (412b) for electrically connecting a plurality of the second electrode bars (412 a).

7. A switchable viewing angle display panel according to claim 1, wherein the width of the electrode strips of the dimming electrodes (41) is smaller than the width of the black matrix (11) and black matrix strips.

8. A switchable viewing angle display panel according to claim 1, wherein the array substrate (20) is provided with a prism layer (21) for condensing light, or/and a side of the array substrate (20) away from the liquid crystal layer (30) is provided with a privacy layer (70) for reducing the light exit angle range.

9. A display device comprising the viewing-angle switchable display panel according to any one of claims 1 to 9.

10. A method of switching a viewing angle of a display device, comprising the display device according to claim 9, wherein the method of switching a viewing angle comprises:

in the wide view angle mode, no electric signal is applied to the light adjusting electrode (41), and at the moment, the quantum dots (42) are dispersed in the carrier liquid;

in the narrow viewing angle mode, a preset electric signal is applied to the dimming electrode (41), and at the same time, the quantum dots (42) are adsorbed on the surface of the dimming electrode (41).

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