CN116679472A

CN116679472A - Display panel with switchable partitioned wide and narrow viewing angles, display device and driving method

Info

Publication number: CN116679472A
Application number: CN202310786740.1A
Authority: CN
Inventors: 刘显贺
Original assignee: InfoVision Optoelectronics Kunshan Co Ltd
Current assignee: InfoVision Optoelectronics Kunshan Co Ltd
Priority date: 2023-06-29
Filing date: 2023-06-29
Publication date: 2023-09-01

Abstract

A display panel with a switchable subarea wide-narrow visual angle, a display device and a driving method are provided, wherein the display panel comprises a dimming box and a display box, and the dimming box is provided with a first polaroid and a transflective layer which are parallel to each other; the display panel is provided with an identification pattern area, a non-identification pattern area and a plurality of view angle switching areas, wherein the identification pattern area is at least positioned in one view angle switching area, and all areas except the identification pattern area in the view angle switching areas are non-identification pattern areas; the first substrate of the dimming box is provided with a plurality of common view angle electrodes, the second substrate of the dimming box is provided with a first view angle electrode and a second view angle electrode, the first view angle electrodes and the second view angle electrodes in two adjacent view angle switching areas are mutually insulated and spaced, the first view angle electrodes comprise first identification pattern electrode strips and first non-identification pattern electrode strips, and the second view angle electrodes comprise second identification pattern electrode strips and second non-identification pattern electrode strips. Realize the switching of wide and narrow viewing angles of the sub-region and display the identification pattern on the screen.

Description

Display panel with switchable partitioned wide and narrow viewing angles, display device and driving method

Technical Field

The present invention relates to the field of liquid crystal display technology, and in particular, to a display panel, a display device, and a driving method for switching between wide and narrow viewing angles.

Background

With the continuous progress of the liquid crystal display technology, the visual angle of the display is widened to more than 160 degrees from the original 112 degrees, and people enjoy the visual experience brought by a large visual angle and meanwhile want to effectively protect business confidentiality and personal privacy so as to avoid business loss or embarrassment caused by screen information leakage. In addition to the wide viewing angle requirement, there are many occasions where the display device is required to have a function of switching between wide and narrow viewing angles.

At present, the switching between the wide viewing angle and the narrow viewing angle is realized mainly by using a dimming box and a display box, the display box is used for controlling normal picture display, the dimming box is used for controlling viewing angle switching, 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, so that the liquid crystal deflects towards the vertical direction, and a narrow viewing angle mode is realized. Switching between a wide viewing angle and a narrow viewing angle can be achieved by controlling the voltage on the viewing angle control electrode. In order to improve the competitiveness of the product, the display panel of the prior art can also see the LOGO (trademark) pattern of the highlighted product when displaying the picture at a narrow viewing angle. However, in the prior art, the LOGO pattern can be seen only under a large viewing angle of a narrow viewing angle display, and the backlight and the display box need to be turned on to see the LOGO pattern, so that the power consumption is high. And, the dimming box that can show LOGO pattern in prior art can only realize full-screen wide-narrow visual angle switching, can't realize subregion wide-narrow visual angle switching.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a display panel with a switchable partitioned wide and narrow view angles, a display device and a driving method, so that when the display panel enters a sleep mode, LOGO patterns are realized by utilizing ambient light reflection, the function diversity is realized, the power consumption is saved, the product competitiveness is improved, and meanwhile, the switching of the partitioned wide and narrow view angles can be realized.

The invention provides a display panel with a switchable partitioned wide and narrow viewing angles, which comprises a display box and a dimming box, wherein the dimming box is laminated on the light emitting side of the display box, a first polaroid is arranged on one side of the dimming box, which is far away from the display box, a transparent and reflective layer is arranged between the dimming box and the display box, a second polaroid is arranged on one side of the display box, which is far away from the dimming box, the transparent axis of the first polaroid is parallel to the transparent axis of the transparent and reflective layer, the transparent axis of the second polaroid is perpendicular to the transparent axis of the transparent and reflective layer, and the reflective axis of the transparent and reflective layer is perpendicular to the transparent axis of the transparent and reflective layer;

the display panel is provided with a graphical identification pattern area, a non-identification pattern area and a plurality of view angle switching areas, wherein the identification pattern area is at least positioned in one view angle switching area, and all areas except the identification pattern area in the view angle switching area are all non-identification pattern areas;

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, one side of the first substrate, which faces the first liquid crystal layer, is provided with a plurality of common viewing angle electrodes corresponding to the viewing angle switching areas one by one, one side of the second substrate, which faces the first liquid crystal layer, is provided with a first viewing angle electrode and a second viewing angle electrode matched with the common viewing angle electrodes, the first viewing angle electrode and the second viewing angle electrode are mutually insulated and spaced apart, the first viewing angle electrode and the second viewing angle electrode in adjacent two viewing angle switching areas are mutually insulated and spaced apart, the first viewing angle electrode comprises a first identification pattern electrode strip and a first non-identification pattern electrode strip which are mutually insulated, the second viewing angle electrode strip and a second non-identification pattern electrode strip which are mutually insulated, the first identification pattern electrode strip and the second identification pattern electrode strip are corresponding to the identification pattern areas, and the first non-identification pattern electrode strip and the second non-identification pattern electrode strip are alternately distributed on the first viewing angle electrode and the second viewing angle electrode strip and the non-identification pattern electrode are alternately distributed on the first viewing angle electrode and the second viewing angle electrode.

Further, a first signal electrode network and a second signal electrode network are further arranged on one side, facing the first liquid crystal layer, of the second substrate, the first signal electrode network and the first view angle electrode are located on different layers, the second signal electrode network and the second view angle electrode are located on different layers, and the first signal electrode network and the second signal electrode network are mutually insulated;

the first signal electrode net comprises a first identification pattern electrode net electrically connected with the first identification pattern electrode strip and a first non-identification pattern electrode net electrically connected with the first non-identification pattern electrode strip, the second signal electrode net comprises a second identification pattern electrode net electrically connected with the second identification pattern electrode strip and a second non-identification pattern electrode net electrically connected with the second non-identification pattern electrode strip, the first identification pattern electrode net and the second identification pattern electrode net are both positioned in the identification pattern area, and the first non-identification pattern electrode net and the second non-identification pattern electrode net are both positioned in the non-identification pattern area.

Further, the side, facing the first liquid crystal layer, of the second substrate is further provided with a first identification pattern signal line and a first non-identification pattern signal line, one end of the first identification pattern signal line is electrically connected with the first identification pattern electrode network, the other end of the first identification pattern signal line extends to the edge of the second substrate, one end of the first non-identification pattern signal line is electrically connected with the first non-identification pattern electrode network, and the other end of the first non-identification pattern signal line extends to the edge of the second substrate;

The second substrate is further provided with a second identification pattern signal wire and a second non-identification pattern signal wire towards one side of the first liquid crystal layer, one end of the second identification pattern signal wire is electrically connected with the second identification pattern electrode network, the other end of the second identification pattern signal wire extends to the edge of the second substrate, one end of the second non-identification pattern signal wire is electrically connected with the second non-identification pattern electrode network, and the other end of the second non-identification pattern signal wire extends to the edge of the second substrate.

Further, the first viewing angle electrode and the second viewing angle electrode are located in different layers, the first signal electrode network and the second signal electrode network are located in different layers, and the second signal electrode network, the second viewing angle electrode, the first signal electrode network and the first viewing angle electrode are sequentially arranged in a direction towards the first liquid crystal layer;

alternatively, the first viewing angle electrode and the second viewing angle electrode are located on the same layer, and the first signal electrode net and the second signal electrode net are located on the same layer.

Further, projections of grid lines in the first signal electrode network and the second signal electrode network on the second substrate are staggered.

Further, the transflective layer is a reflective polarizer or a metal wire grid polarizer.

The application also provides a display device which comprises the backlight module and the display panel with the switchable partitioned wide and narrow viewing angles, wherein the display panel is positioned on the light emitting side of the backlight module, the backlight module and the viewing angle switching areas are corresponding to the dimming areas one by one, and the dimming areas emit light independently.

The present application also provides a driving method of a display device for driving the display device as described above, the driving method comprising:

applying a common electrical signal to all the common viewing angle electrodes and applying a first electrical signal to all the first viewing angle electrodes and all the second viewing angle electrodes in a full-screen wide viewing angle mode, wherein the pressure difference between the first electrical signal and the common electrical signal is larger than a first preset value or smaller than a second preset value;

applying a common electrical signal to all the common viewing angle electrodes and applying a second electrical signal to all the first viewing angle electrodes and all the second viewing angle electrodes in a full-screen narrow viewing angle mode, wherein the pressure difference between the second electrical signal and the common electrical signal is larger than a third preset value and smaller than a fourth preset value;

In the regional narrow viewing angle mode, reducing the light-emitting brightness of a dimming region corresponding to a narrow viewing angle region, applying a common electrical signal to the common viewing angle electrode in the narrow viewing angle region, and applying a second electrical signal to both the first viewing angle electrode in the narrow viewing angle region and the second viewing angle electrode in the narrow viewing angle region, wherein the pressure difference between the second electrical signal and the common electrical signal is larger than a third preset value and smaller than a fourth preset value;

applying a common electric signal to all the common viewing angle electrodes, applying a third electric signal to the first identification pattern electrode bars, and applying a fourth electric signal to the second identification pattern electrode bars in an identification pattern display mode, wherein the pressure difference between the third electric signal and the fourth electric signal is larger than a fifth preset value and smaller than a sixth preset value;

wherein, when in the full-screen wide view angle mode, the full-screen narrow view angle mode and the area narrow view angle mode, the backlight module and the display box are both in an open state, and when in the pattern display mode, the backlight module and the display box are both in a closed state; the second preset value is less than the third preset value, less than the fourth preset value, less than the first preset value, and less than the fifth preset value, less than the sixth preset value.

Further, the driving method further includes:

in the specular reflection mode, applying a common electrical signal to all the common viewing angle electrodes, applying a third electrical signal to all the first viewing angle electrodes, and applying a fourth electrical signal to all the second viewing angle electrodes, wherein the pressure difference between the third electrical signal and the fourth electrical signal is larger than a fifth preset value and smaller than a sixth preset value;

and in the specular reflection mode, the backlight module and the display box are both in a closed state.

Further, the driving method further includes:

applying a common electric signal to the common visual angle electrode in the omnibearing black peep-proof area when in the omnibearing black peep-proof mode, applying a third electric signal to the first identification pattern electrode strip in the omnibearing black peep-proof area, and applying a fourth electric signal to the second identification pattern electrode strip in the omnibearing black peep-proof area, wherein the pressure difference between the third electric signal and the fourth electric signal is larger than a fifth preset value and smaller than a sixth preset value;

and when the backlight module is in the region omnibearing black peep-proof mode, the backlight module and the display box are both in an open state.

The application has the beneficial effects that: the first substrate is provided with a plurality of common view angle electrodes which are in one-to-one correspondence with the view angle switching areas, and the first view angle electrodes and the second view angle electrodes in two adjacent view angle switching areas are mutually insulated and spaced, so that the wide and narrow view angle states of each view angle switching area can be independently controlled to realize the switching of the wide and narrow view angles in different areas; and set up the layer that passes through between the box that adjusts luminance and display box, and set up first sign pattern electrode strip and second sign pattern electrode strip on the second base plate, the projection of first sign pattern electrode strip and second sign pattern electrode strip on the second base plate is parallel to each other and the alternate distribution, consequently, can be through the differential pressure between control first sign pattern electrode strip and the second sign pattern electrode strip, with the deflection of formation fringe electric field and control liquid crystal molecule in the first liquid crystal layer in the horizontal direction, thereby make the reflection light of passing through the layer and pass sign pattern district, realize the demonstration of sign pattern, can also see the sign pattern under the front view angle moreover, when showing the sign pattern, need not backlight and open the display box, can save the consumption. Therefore, the display panel provided by the application not only can realize the switching of the wide and narrow viewing angles in different areas, but also can realize the display of the identification pattern by utilizing the reflected ambient light when entering the sleep mode.

Drawings

FIG. 1 is a schematic plan view of a display device according to a first embodiment of the present invention;

fig. 2 is a schematic structural diagram of a display device in an initial state according to a first embodiment of the present invention;

FIG. 3 is a schematic diagram of a second substrate according to a first embodiment of the invention;

FIG. 4 is a schematic plan view of a common viewing angle electrode according to a first embodiment of the present invention;

FIG. 5 is a schematic plan view of a first viewing angle electrode according to a first embodiment of the present invention;

FIG. 6 is a schematic plan view of a first signal electrode network according to a first embodiment of the present invention;

FIG. 7 is a schematic plan view of a second viewing angle electrode according to a first embodiment of the present invention;

FIG. 8 is a schematic plan view of a second signal electrode network according to a first embodiment of the present invention;

FIG. 9 is a signal waveform diagram of a display device with full-screen wide viewing angle according to an embodiment of the invention;

FIG. 10 is a schematic diagram of a display device with a full-screen wide viewing angle according to an embodiment of the present invention;

FIG. 11 is a signal waveform diagram of a display device with a full-screen narrow viewing angle/a regional narrow viewing angle according to an embodiment of the present invention;

FIG. 12 is a schematic diagram of a display device with a full screen and narrow viewing angle according to an embodiment of the present invention;

FIG. 13 is a schematic view showing a display device with a narrow viewing angle in a region according to the first embodiment of the present invention;

FIG. 14 is a schematic plan view of a display device with a narrow viewing angle in a region according to a first embodiment of the present invention;

FIG. 15 is a schematic diagram of a backlight module for area dimming when the display device is in an area with a narrow viewing angle according to an embodiment of the invention;

fig. 16 is a signal waveform diagram of the display device in the area omnibearing black peep-proof mode/mark pattern display/mirror reflection according to the first embodiment of the present invention;

fig. 17 is a schematic structural diagram of a display device in a regional omnibearing black peep-proof mode according to an embodiment of the present invention;

FIG. 18 is a simulation diagram of transmittance and pressure difference between a first viewing angle electrode and a second viewing angle electrode in a regional omnibearing black peep-proof mode of a light regulating box according to an embodiment of the present invention;

FIG. 19 is a schematic diagram showing the brightness in the left-right direction and the voltage difference between the first viewing angle electrode and the second viewing angle electrode of 0V/5.8V in the region omnibearing black peep-proof mode of the light regulating box according to the first embodiment of the present invention;

FIG. 20 is a schematic diagram showing the brightness in the up-down direction and the voltage difference between the first viewing angle electrode and the second viewing angle electrode being 0V/5.8V in the region omnibearing black peep-proof mode of the light regulating box according to the first embodiment of the present invention;

fig. 21 is a schematic structural diagram of a display device in displaying a logo according to a first embodiment of the present invention;

Fig. 22 is a schematic plan view of a display device according to the first embodiment of the invention when displaying a logo;

FIG. 23 is a schematic view showing a structure of a display device in specular reflection according to the first embodiment of the invention;

FIG. 24 is a schematic diagram of a display device according to a first embodiment of the present invention when the logo is displayed/specularly reflected;

FIG. 25 is a schematic diagram of a second substrate according to a second embodiment of the present invention;

fig. 26 is a schematic view of a display device in an initial state according to a third embodiment of the present invention;

fig. 27 is a schematic plan view of a display device according to a fourth embodiment of the present invention;

fig. 28 is a schematic plan view of a first viewing angle electrode according to a fourth embodiment of the present invention;

fig. 29 is a schematic plan view of a second viewing angle electrode according to a fourth embodiment of the present invention;

fig. 30 is a schematic plan view of a display device according to the present invention.

Detailed Description

In order to further describe the technical means and effects adopted for achieving the preset aim of the present invention, the following detailed description refers to the specific implementation, structure, characteristics and effects of the display panel, display device and driving method with switchable partition wide and narrow viewing angles according to the present invention, with reference to the accompanying drawings and preferred embodiments, wherein:

Example one

Fig. 1 is a schematic plan view of a display device according to a first embodiment of the invention. Fig. 2 is a schematic structural diagram of a display device in an initial state according to a first embodiment of the present invention. Fig. 3 is a schematic structural diagram of a second substrate according to a first embodiment of the invention. Fig. 4 is a schematic plan view of a common viewing angle electrode according to a first embodiment of the present invention. Fig. 5 is a schematic plan view of a first viewing angle electrode according to a first embodiment of the present invention. Fig. 6 is a schematic plan view of a first signal electrode network according to a first embodiment of the present invention. Fig. 7 is a schematic plan view of a second viewing angle electrode according to a first embodiment of the present invention. Fig. 8 is a schematic plan view of a second signal electrode network according to a first embodiment of the present invention.

As shown in fig. 1 to 8, a display panel with switchable viewing angles is provided according to a first embodiment of the present invention. As shown in fig. 1, the display panel has a patterned LOGO pattern area 110 and a non-LOGO pattern area 120, where the pattern of the LOGO pattern area 110 can be set according to the LOGO pattern to be displayed actually, and in this embodiment, the letter "V" is taken as an example of the LOGO pattern to be displayed in the LOGO pattern area 110. It will be appreciated that the display panel has a display area and a non-display area, and that both the LOGO pattern area 110 and the non-LOGO pattern area 120 are located in the display area so that the LOGO pattern can be displayed. The display panel has a plurality of viewing angle switching regions 200, wherein the identification pattern region 110 is at least located in one viewing angle switching region 200, and all regions except for the identification pattern region 110 in all the viewing angle switching regions 200 are non-identification pattern regions 120.

As shown in fig. 2 and 3, the display panel includes a dimming box 10 and a display box 20 that are stacked on each other, and the dimming box 10 is disposed above the display box 20, that is, the dimming box 10 is located on the light emitting side of the display box 20. The dimming box 10 is used for controlling the wide-narrow viewing angle switching of the display panel, and the display box 20 is used for controlling the display panel to display normal pictures. The first polaroid 31 is arranged on one side of the dimming box 10 away from the display box 20, the transflective layer 32 is arranged between the dimming box 10 and the display box 20, and the second polaroid 33 is arranged on one side of the display box 20 away from the dimming box 10. The transflective layer 32 has an optical axis and a light transmission axis, the optical axis of the transflective layer 32 is perpendicular to the optical axis of the transflective layer 32, the light transmission axis of the first polarizer 31 is parallel to the optical axis of the transflective layer 32, and the light transmission axis of the second polarizer 33 is perpendicular to the optical axis of the transflective layer 32. For example, the light transmission axes of the first polarizer 31 and the transflective layer 32 are, for example, 0 °, the light reflection axis of the transflective layer 32 is 90 °, and the light transmission axis of the second polarizer 33 is 90 °. In this embodiment, the transflective layer 32 is a reflective polarizer, which is also called a reflective polarized ultrathin optical film (APF, advanced Polarizer Film), and has a specular reflectance (SCI) of more than 46%, and the reflective polarizer has a light transmission axis and a light reflection axis, which are perpendicular to each other. Further, a third polarizer 34 may be disposed on a side of the display case 20 adjacent to the light modulation case, and a light transmission axis of the third polarizer 34 is parallel to a light transmission axis of the light transmission and reflection layer 32. A compensation film may be further provided between the dimming case 10 and the display case 20, and the compensation film may be a viewing angle compensation film for compensating a narrow viewing angle or a brightness compensation film for compensating brightness.

As shown in fig. 2, 3, 4, 5, and 7, the dimming cartridge 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 plurality of common viewing angle electrodes 111 in one-to-one correspondence with the viewing angle switching regions 200 on a side facing the first liquid crystal layer 13. The second substrate 12 is provided at a side facing the first liquid crystal layer 13 with a first viewing angle electrode 14 and a second viewing angle electrode 16 mated with the common viewing angle electrode 111, and the first viewing angle electrode 14 and the second viewing angle electrode 16 are insulated and spaced apart from each other. The first viewing angle electrodes 14 in the adjacent two viewing angle switching regions 200 are insulated and spaced apart from each other, and the second viewing angle electrodes 16 in the adjacent two viewing angle switching regions 200 are insulated and spaced apart from each other. Control of the wide-narrow viewing angle switching is achieved by controlling the voltage difference between the common viewing angle electrode 111 and the first viewing angle electrode 14 and between the common viewing angle electrode 111 and the second viewing angle electrode 16 to form a vertical electric field and control the deflection of the liquid crystal molecules in the first liquid crystal layer 13 in the vertical direction. And the first viewing angle electrodes 14 in the adjacent two viewing angle switching regions 200 are insulated and spaced apart from each other, and the second viewing angle electrodes 16 in the adjacent two viewing angle switching regions 200 are insulated and spaced apart from each other, so that the first viewing angle electrodes 14 and the second viewing angle electrodes 16 in each viewing angle switching region 200 can respectively apply different viewing angle control signals to realize the wide-narrow viewing angle switching of the sub-regions.

In this embodiment, the display panel has 9 viewing angle switching regions 200,9 which are arranged in an array and are in one-to-one correspondence with the viewing angle switching regions 200, the first viewing angle electrode 14 and the second viewing angle electrode 16 are also divided into 9 regions, the first viewing angle electrodes 14 in two adjacent viewing angle switching regions 200 are insulated and spaced apart from each other, and the second viewing angle electrodes 16 in two adjacent viewing angle switching regions 200 are insulated and spaced apart from each other. Wherein the identification pattern region 110 is located within the central viewing angle switching region 200. Of course, the number and shape of the viewing angle switching regions 200 may be set according to actual needs, and are not limited thereto.

Further, as shown in fig. 2, 3, 5 and 7, the first viewing angle electrode 14 includes a first identification pattern electrode bar 141 and a first non-identification pattern electrode bar 142 insulated from each other, and the second viewing angle electrode 16 includes a second identification pattern electrode bar 161 and a second non-identification pattern electrode bar 162 insulated from each other. The first and second identification pattern electrode bars 141 and 161 each correspond to the identification pattern region 110, and the first and second non-identification pattern electrode bars 142 and 162 each correspond to the non-identification pattern region 120. The projections of the first and second identification pattern electrode bars 141 and 161 on the second substrate 12 are parallel and alternately distributed, and the projections of the first and second non-identification pattern electrode bars 142 and 162 on the second substrate 12 are parallel and alternately distributed, that is, the first and second identification pattern electrode bars 141 and 161 are parallel and alternately distributed in the identification pattern region 110, and the first and second non-identification pattern electrode bars 142 and 162 are parallel and alternately distributed in the non-identification pattern region 120. By controlling the voltage difference between the first and second identification pattern electrode bars 141 and 161 to form a fringe electric field and controlling the deflection of the liquid crystal molecules in the first liquid crystal layer 13 in the horizontal direction in the corresponding identification pattern region 110, the reflected light of the transflective layer 32 passes through the identification pattern region 110, so that the display of the identification pattern is realized, and the identification pattern can be seen under the front view angle; when the identification pattern is displayed, a backlight source is not needed, the display box is not needed to be opened, and power consumption can be saved. Also, the effect of specular reflection can be achieved by controlling the pressure difference between the first and second identification pattern electrode bars 141 and 161 and the pressure difference between the first and second non-identification pattern electrode bars 142 and 162 to form a fringe electric field and controlling the deflection of all liquid crystal molecules in the first liquid crystal layer 13 in the horizontal direction, so that the reflected light of the transflective layer 32 passes through the identification pattern region 110 and the non-identification pattern region 120.

Further, as shown in fig. 3, the widths a of the first and second identification pattern electrode bars 141 and 161, the first and second non-identification pattern electrode bars 142 and 162 are 2-4 μm, for example, 3.5 μm. The pitches b between the adjacent two first identification pattern electrode bars 141, between the adjacent two second identification pattern electrode bars 161, between the adjacent two first non-identification pattern electrode bars 142, and between the adjacent two second non-identification pattern electrode bars 162 are 4 to 6 μm, for example, 5.5 μm.

As shown in fig. 2, 3, 5 and 6, the second substrate 12 is further provided with a first signal electrode net 15 on a side facing the first liquid crystal layer 13, and the first signal electrode net 15 and the first viewing angle electrode 14 are located at different layers and are spaced apart from each other by an insulating layer. The first signal electrode net 15 is bridged with the first viewing angle electrode 14 in a diamond shape in the whole display area, and the first viewing angle electrode 14 is electrically connected with the first signal electrode net 15 through a contact hole.

The first signal electrode net 15 includes a first identification pattern electrode net 151 electrically connected to the first identification pattern electrode bar 141 and a first non-identification pattern electrode net 152 electrically connected to the first non-identification pattern electrode bar 142, the first identification pattern electrode net 151 corresponding to the identification pattern region 110, and the first non-identification pattern electrode net 152 corresponding to the non-identification pattern region 120.

The second substrate 12 is further provided with a first identification pattern signal line 153 and a first non-identification pattern signal line 154 on a side facing the first liquid crystal layer 13. The first identification pattern electrode bar 141 is electrically connected to the first identification pattern electrode net 151 through a contact hole, one end of the first identification pattern signal line 153 is electrically connected to the first identification pattern electrode net 151, and the other end of the first identification pattern signal line 153 extends to the edge of the second substrate 12, so that an electrical signal is applied to the first identification pattern electrode bar 141 through the first identification pattern signal line 153. The first non-identification pattern electrode bars 142 are electrically connected to the first non-identification pattern electrode net 152 through contact holes, one end of the first non-identification pattern signal line 154 is electrically connected to the first non-identification pattern electrode net 152, and the other end of the first non-identification pattern signal line 154 extends to the edge of the second substrate 12, so that an electrical signal is applied to the first non-identification pattern electrode bars 142 through the first non-identification pattern signal line 154.

As shown in fig. 2, 3, 7 and 8, in this embodiment, a second signal electrode network 17 is further disposed on a side of the second substrate 12 facing the first liquid crystal layer 13, the second signal electrode network 17 and the second viewing angle electrode 16 are located on different layers, and the first signal electrode network 15 and the second signal electrode network 17 are insulated from each other. In this embodiment, the first viewing angle electrode 14 and the second viewing angle electrode 16 are located in different layers, the first signal electrode mesh 15 and the second signal electrode mesh 17 are located in different layers, and the second signal electrode mesh 17, the second viewing angle electrode 16, the first signal electrode mesh 15 and the first viewing angle electrode 14 are sequentially disposed in a direction toward the first liquid crystal layer 13 and are spaced apart from each other by an insulating layer.

The second signal electrode net 17 includes a second identification pattern electrode net 171 electrically connected to the second identification pattern electrode bar 161 and a second non-identification pattern electrode net 172 electrically connected to the second non-identification pattern electrode bar 162, the second identification pattern electrode net 171 corresponding to the identification pattern region 110, the second non-identification pattern electrode net 172 corresponding to the non-identification pattern region 120.

The second substrate 12 is further provided with a second identification pattern signal line 173 and a second non-identification pattern signal line 174 on a side facing the first liquid crystal layer 13. The second identification pattern electrode bars 161 are electrically connected to the second identification pattern electrode net 171 through contact holes, one end of the second identification pattern signal lines 173 are electrically connected to the second identification pattern electrode net 171, and the other end of the second identification pattern signal lines 173 extend to the edge of the second substrate 12, so that an electrical signal is applied to the second identification pattern electrode bars 161 through the second identification pattern signal lines 173. The second non-identification pattern electrode bar 162 is electrically connected to the second non-identification pattern electrode net 172 through the contact hole, one end of the second non-identification pattern signal line 174 is electrically connected to the second non-identification pattern electrode net 172, and the other end of the second non-identification pattern signal line 174 extends to the edge of the second substrate 12, so that an electrical signal is applied to the second non-identification pattern electrode bar 162 through the second non-identification pattern signal line 174.

By providing the first signal electrode net 15 to apply signals to the first viewing angle electrode 14 and the second signal electrode net 17 to apply signals to the second viewing angle electrode 16, signals are not required to be provided on the film layer where the first viewing angle electrode 14 and the second viewing angle electrode 16 are located, and design and display of the identification pattern are not affected.

As shown in fig. 1, 2 and 4, a common signal line 111a is disposed on a side of the first substrate 11 facing the first liquid crystal layer 13, one end of the common signal line 111a is electrically connected to the common viewing angle electrode 111, and the other end of the common signal line 111a extends to an edge of the second substrate 12, so that an electric signal is applied to the common viewing angle electrode 111 through the common signal line 111 a.

In the present embodiment, projections of grid lines in the first signal electrode network 15 and the second signal electrode network 17 on the second substrate 12 overlap each other, thereby reducing the influence of the first signal electrode network 15 and the second signal electrode network 17 on the light transmittance. Of course, the grid lines in the first signal electrode network 15 and the second signal electrode network 17 may be offset from each other, which is not limited thereto.

Further, the second substrate 12 is further provided with an insulating layer on a side facing the first liquid crystal layer 13, and the insulating layer covers the first viewing angle electrode 14, so as to prevent the first viewing angle electrode 14 from being shorted with the common viewing angle electrode 111.

In this embodiment, the first liquid crystal layer 13 preferably employs positive liquid crystal molecules, that is, liquid crystal molecules having positive dielectric anisotropy. The phase retardation of the first liquid crystal layer 13 is preferably 800nm, optionally in the range 500nm < phase retardation < 1000nm. As shown in fig. 2, at 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 direction of the positive liquid crystal molecules near the first substrate 11 is parallel or antiparallel to the alignment direction of the positive liquid crystal molecules near the second substrate 12, so that the dimming cell 10 exhibits a wide viewing angle display at the initial state, as shown in fig. 11. Optionally, the alignment direction of the first liquid crystal layer 13 is 5 ° to 10 °, preferably 7 °, with respect to the length direction of the electrode bars in the first viewing angle electrode 14 and the second viewing angle electrode 16, so that the positive liquid crystal molecules in the first liquid crystal layer 13 can be accelerated to deflect in the horizontal direction during the display of the logo pattern and the specular reflection. Of course, the positive liquid crystal molecules in the first liquid crystal layer 13 may also have a pretilt angle of 3 ° -7 ° at the beginning, so that the positive liquid crystal molecules in the first liquid crystal layer 13 may be accelerated to deflect in the vertical direction at a narrow viewing angle.

In this embodiment, the display cell 20 is preferably a liquid crystal cell. Of course, in other embodiments, the display box 20 may be a self-luminous display (e.g. OLED display, micro LED display), but the dimming box 10 needs to be disposed above the display box 20.

The display box 20 includes a color film substrate 21, an array substrate 22 disposed opposite to the color film substrate 21, and a second liquid crystal layer 23 disposed between the color film substrate 21 and the array substrate 22. The second liquid crystal layer 23 preferably employs positive liquid crystal molecules, i.e., 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 film substrate 21 and the array substrate 22, and the positive liquid crystal molecules on the side close to the color film substrate 21 are aligned parallel or antiparallel to the alignment direction of the positive liquid crystal molecules on the side close to the array substrate 22. Of course, in other embodiments, the second liquid crystal layer 23 may also use 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, i.e. in an alignment manner similar to the VA display mode.

The color film substrate 21 is provided with a color resistance layer 212 arranged in an array and a black matrix 211 for spacing the color resistance layer 212, wherein the color resistance layer 212 comprises red (R), green (G) and blue (B) color resistance materials, and sub-pixels of the red (R), green (G) and blue (B) colors are correspondingly formed.

The array substrate 22 is defined by a plurality of scan lines (not shown) and a plurality of data lines (not shown) on a side facing the second liquid crystal layer 23, and each pixel unit is provided therein with a pixel electrode 222 and a thin film transistor (not shown), and the pixel electrode 222 is electrically connected to the data line adjacent to the 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, wherein the gate electrode and the scan line are disposed on the same layer and electrically connected, the gate electrode and the active layer are separated 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 by a contact hole.

As shown in fig. 2, 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 are insulated and isolated by an insulating layer. The common electrode 221 may be located above or below the pixel electrode 222 (the common electrode 221 is shown below the pixel electrode 222 in fig. 2). Preferably, the common electrode 221 is a planar electrode disposed entirely, and the pixel electrode 222 is a block electrode disposed entirely within each pixel unit or a slit electrode having a plurality of electrode bars to form a fringe field switching pattern (Fringe Field Switching, FFS). Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 may be located at 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 bars, and the electrode bars of the pixel electrode 222 and the electrode bars of the common electrode 221 are alternately arranged with each other to form an In-Plane Switching (IPS); 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 film 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.

The first substrate 11, the second substrate 12, the color film substrate 21, and the array substrate 22 may be made of glass, acrylic, polycarbonate, or the like. The materials of the common viewing angle electrode 111, the first viewing angle electrode 14, the second viewing angle electrode 16, the common electrode 221, and the pixel electrode 222 may be Indium Tin Oxide (ITO) or Indium Zinc Oxide (IZO), or the like. The first and second signal electrode nets 15 and 17 may be copper (Cu), silver (Ag), chromium (Cr), molybdenum (Mo), aluminum (Al), titanium (Ti), manganese (Mn), nickel (Ni), etc., or a combination of the above metals, for example, a metal having a small resistance such as Al/Mo, cu/Mo, etc.

The invention also provides a display device which comprises the display panel with the switchable partitioned wide and narrow visual angles and a backlight module 40, wherein the backlight module 40 is positioned below the display panel and is used for providing a backlight source for the display panel. Of course, if the display case 20 employs a self-luminous display, no additional backlight is required. The backlight module 40 and the viewing angle switching area 200 are respectively and correspondingly provided with a plurality of dimming areas 401, and the dimming areas 401 emit light independently, so that local dynamic backlight adjustment is realized, and each dimming area 401 can automatically adjust the brightness of the backlight module 40 according to the requirement of the current display picture.

The backlight module 40 includes a backlight 41 and a peep-proof layer 43, wherein the peep-proof layer 43 is used for reducing the range of the light emitting angle. A brightness enhancement film 42 is further disposed 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 shutter structure, which can block light with a larger incident angle, so that light with a smaller incident angle passes through the shutter structure, and the angle range of the light passing through the peep-proof layer 43 is reduced. The peep-proof layer 43 comprises a plurality of parallel light-resisting walls and light holes between two adjacent light-resisting walls, and light-absorbing materials are arranged on two sides of the light-resisting walls. Of course, the backlight 41 may be a light-collecting type backlight, so that the peep-proof layer 43 is not required, but the light-collecting type backlight is more expensive than a conventional backlight.

The backlight module 40 adopts a direct type backlight module. Preferably, the backlight module 40 adopts a collimated backlight (CBL, collimated backlight) mode, which can collect light to ensure display effect. The backlight 41 is an LED backlight, and a plurality of LED lamps 411 are disposed on a substrate of the backlight 41, and the LED lamps 411 in each dimming area 401 can independently adjust brightness.

The application also provides a driving method for driving the display panel with the switchable partitioned wide and narrow viewing angles, which comprises the following steps:

Fig. 9 is a signal waveform diagram of the display device at a full-screen wide viewing angle in the first embodiment of the invention. Fig. 10 is a schematic diagram of a display device with a full-screen wide viewing angle according to an embodiment of the invention. As shown in fig. 9 and 10, in the full-screen wide viewing angle mode, the common electric signal Vcom is applied to all the common viewing angle electrodes 111, wherein the common electric signal Vcom is a direct-current common voltage signal, and the first electric signal V1 is applied to all the first viewing angle electrodes 14, i.e., the first identification pattern electrode bars 141 and the first non-identification pattern electrode bars 142, and all the second viewing angle electrodes 16, i.e., the second identification pattern electrode bars 161 and the second non-identification pattern electrode bars 162.

In this embodiment, the voltage difference between the first electric signal V1 and the common electric signal Vcom may also be larger than a first preset value (for example, larger than 5.0V), for example, the common viewing angle electrode 111 applies a dc voltage of 0V (fig. 9), all the first viewing angle electrodes 14 and all the second viewing angle electrodes 16 apply an ac voltage of 5.0V, a strong vertical electric field (E2 in fig. 10) is formed between the common viewing angle electrode 111 and all the first viewing angle electrodes 14 and between the common viewing angle electrode 111 and all the second viewing angle electrodes 16, and positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected and perpendicular to the first substrate 11 and the second substrate 12, as shown in fig. 10, and the light adjusting box 10 presents a wide viewing angle display. Of course, in other embodiments, the voltage difference between the first electric signal V1 and the common electric signal Vcom is smaller than the second preset value (e.g. smaller than 0.8V), the vertical electric field is not formed substantially between the common viewing angle electrode 111 and all the first viewing angle electrodes 14 and between the common viewing angle electrode 111 and all the second viewing angle electrodes 16, the positive liquid crystal molecules in the first liquid crystal layer 13 are not deflected substantially, and the initial flat lying state is maintained, and the light adjusting box 10 also presents a wide viewing angle display.

Fig. 11 is a signal waveform diagram of the display device in the first embodiment of the invention when the display device is in a full-screen narrow viewing angle/an area narrow viewing angle. Fig. 12 is a schematic diagram of a display device with a full screen and narrow viewing angle according to an embodiment of the invention. As shown in fig. 11 and 12, in the full-screen narrow viewing angle mode, the common electric signal Vcom is applied to all the common viewing angle electrodes 111, the second electric signal V2 is applied to all the first viewing angle electrodes 14 and all the second viewing angle electrodes 16, the voltage difference between the second electric signal V2 and the common electric signal Vcom is greater than the third preset value (for example, greater than 1.5V) and less than the fourth preset value (for example, less than 4.0V), wherein the second preset value < the third preset value < the fourth preset value < the first preset value, and a strong vertical electric field (E3 in fig. 12) is formed between the common viewing angle electrodes 111 and all the first viewing angle electrodes 14 and between the common viewing angle electrodes 111 and all the second viewing angle electrodes 16, and positive liquid crystal molecules in the first liquid crystal layer 13 deflect greatly and assume an inclined state, and the brightness becomes dark under a large viewing angle, and the dimming box 10 assumes a narrow viewing angle display.

Specifically, the second electric signal V2 includes a first voltage V21 and a second voltage V22, all of the first viewing angle electrodes 14 apply the first voltage V21, and all of the second viewing angle electrodes 16 apply the second voltage V22. Since the first viewing angle electrode 14 and the second viewing angle electrode 16 are located at different layers, in order to avoid the influence of the difference in distance from the common viewing angle electrode 111, the first voltage V21 is smaller than the second voltage V22 and the difference in voltage is 0.1-0.5V, for example 0.2V. The first voltage V21 is, for example, 2.6V, and the second voltage V22 is, for example, 2.8V, so as to ensure that the intensity of the vertical electric field formed between the common viewing angle electrode 111 and all the first viewing angle electrodes 14 and all the second viewing angle electrodes 16 is the same, respectively, and to ensure a narrow viewing angle effect.

Further, in the full-screen narrow viewing angle mode, a large voltage difference can be formed between the first identification pattern electrode bar 141 and the second identification pattern electrode bar 161, and a large horizontal electric field is formed, so that positive liquid crystal molecules in the first liquid crystal layer 13 in the identification pattern region 110 are greatly deflected in the horizontal direction, and positive liquid crystal molecules in the first liquid crystal layer 13 in the identification pattern region 110 have a phase retardation of λ/4, so that reflected light rays of the transflective layer 32 pass through the identification pattern region 110, and display of the identification pattern can be realized in the full-screen narrow viewing angle mode under a large viewing angle. In the front view, the identification pattern cannot be seen clearly due to the high intensity of the transmitted backlight.

Fig. 13 is a schematic structural diagram of a display device with a narrow viewing angle in a region according to a first embodiment of the present invention. Fig. 14 is a schematic plan view of a display device with a narrow viewing angle in a region according to a first embodiment of the present invention. Fig. 15 is a schematic view of a backlight module for area dimming when the display device is in an area with a narrow viewing angle in the first embodiment of the invention. As shown in fig. 12 to 15, in the region narrow viewing angle mode, the common electric signal Vcom is applied to the common viewing angle electrode 111 in the narrow viewing angle region, the second electric signal V2 is applied to both the first viewing angle electrode 14 in the narrow viewing angle region and the second viewing angle electrode 16 in the narrow viewing angle region, the voltage difference between the second electric signal V2 and the common electric signal Vcom is greater than the third preset value (e.g. greater than 1.5V) and less than the fourth preset value (e.g. less than 4.0V), at this time, a strong vertical electric field (E3 in fig. 13) is formed between the common viewing angle electrode 111 and the first viewing angle electrode 14 in the narrow viewing angle region and between the common viewing angle electrode 111 and the second viewing angle electrode 16, positive liquid crystal molecules in the first liquid crystal layer 13 in the narrow viewing angle region are greatly deflected and in an inclined state, and the brightness is darkened under a large viewing angle, at this time, the light-adjusting box 10 presents a narrow viewing angle display in the corresponding viewing angle switching region 200. The common viewing angle electrode 111, the first viewing angle electrode 14 and the second viewing angle electrode 16 in the other viewing angle switching region 200 may not be applied with voltage, and may be applied with the same electric signal as the full-screen wide viewing angle mode.

As shown in fig. 14 and 15, in the area narrow viewing angle mode, the light emission luminance of the dimming area 401 corresponding to the narrow viewing angle area is simultaneously reduced so that the luminance of the dimming area 401 corresponding to the narrow viewing angle area is smaller than the luminance of the other dimming areas 401, further increasing the narrow viewing angle effect.

Fig. 16 is a signal waveform diagram of the display device in the area omnibearing black peep-proof mode/mark pattern display/specular reflection according to the first embodiment of the present invention. Fig. 17 is a schematic structural diagram of the display device in the area omnibearing black peep-proof mode according to the first embodiment of the present invention. As shown in fig. 16 and 17, in the area omnibearing black peep prevention mode, a common electric signal Vcom is applied to the common viewing angle electrode 111 in the omnibearing black peep prevention area, a third electric signal V3 is applied to the first identification pattern electrode bar 141 in the omnibearing black peep prevention area, a fourth electric signal V4 is applied to the second identification pattern electrode bar 161 in the omnibearing black peep prevention area, and a pressure difference between the third electric signal V3 and the fourth electric signal V4 is greater than a fifth preset value (for example, greater than 1.5V) and less than a sixth preset value (for example, less than 10V). In this embodiment, the second preset value < the fifth preset value < the sixth preset value, the common electric signal Vcom and the fourth electric signal V4 are both 0V dc voltage, and the third electric signal V3 is, for example, 5.8V ac voltage. At this time, a large horizontal electric field (E5 in fig. 17) is formed between the first and second identification pattern electrode bars 141 and 161 in the omnibearing black-state peep-proof area, and of course, the first identification pattern electrode bars 141 and the common viewing angle electrode 111 also form a certain vertical electric field (E4 in fig. 17), so that positive liquid crystal molecules in the first liquid crystal layer 13 in the omnibearing black-state peep-proof area are greatly deflected in the horizontal direction, so that the first liquid crystal layer 13 in the omnibearing black-state peep-proof area has a phase delay of λ/2, and the backlight cannot pass through the omnibearing black-state peep-proof area corresponding to the light adjusting box 10, so that the omnibearing black-state peep-proof area is in a black state, thereby enhancing the peep-proof effect.

In the region omnibearing black peep-proof mode, the light-emitting brightness of the dimming region 401 corresponding to the omnibearing black peep-proof region is reduced at the same time, so that the brightness of the dimming region 401 corresponding to the omnibearing black peep-proof region is smaller than that of other dimming regions 401, and the omnibearing black peep-proof effect is further improved.

Fig. 18 is a simulation diagram of transmittance and a pressure difference between a first viewing angle electrode and a second viewing angle electrode in a regional omnibearing black peep-proof mode of a dimming box according to an embodiment of the present invention. Fig. 19 is a simulation diagram of brightness in the left-right direction and a voltage difference between the first viewing angle electrode and the second viewing angle electrode of 0V/5.8V in the region omnibearing black peep-proof mode of the dimming box according to the embodiment of the present invention. Fig. 20 is a simulation diagram of brightness in the up-down direction and a voltage difference between the first viewing angle electrode and the second viewing angle electrode of 0V/5.8V in the region omnibearing black peep-proof mode of the dimming box according to the embodiment of the present invention. As shown in fig. 18, it can be seen from the figure that the greater the pressure difference between the first and second identification pattern electrode bars 141 and 161, the lower the transmittance of the light modulation box 10 through the backlight, the more the first liquid crystal layer 13 in the omnibearing black peep-proof area has λ/2, and the remaining light is the reflected ambient light. When the pressure difference between the first identification pattern electrode strip 141 and the second identification pattern electrode strip 161 is increased from 0V to 5.8V, the transmittance is reduced from 26.3% to 5.6%, the brightness is reduced by approximately 5 times, for example, the front view brightness of a narrow viewing angle is 200nits, the front view brightness of an omnibearing black peep-proof area is only about 40nits, the backlight brightness of the collocation area is reduced, the front view angle brightness of the omnibearing black peep-proof area can be within 10nits, and the pattern is blurred to realize omnibearing black peep-proof. As shown in fig. 19 and 20, the solid line curve in the drawing is a simulation curve when the pressure difference between the first and second identification pattern electrode bars 141 and 161 is 0V, and the dotted line curve is a simulation curve when the pressure difference between the first and second identification pattern electrode bars 141 and 161 is 5.8V, and as can be seen from fig. 19 and 20, the brightness in each direction of the light modulation box 10 is low when the pressure difference between the first and second identification pattern electrode bars 141 and 161 is 5.8V, thereby realizing the area omnidirectional black state privacy mode.

In the full-screen wide viewing angle mode, the full-screen narrow viewing angle mode and the regional omnibearing black-state peep-proof mode, the display box 20 and the backlight module 40 are opened, corresponding gray-scale voltages are applied to the pixel electrodes 222, a voltage difference is formed between the pixel electrodes 222 and the common electrode 221, a horizontal electric field is generated (E1 in FIG. 10, FIG. 12, FIG. 13 and FIG. 17), positive liquid crystal molecules deflect in the horizontal direction towards the direction parallel to the horizontal electric field, the gray-scale voltages comprise 0-255 gray-scale voltages, and when different gray-scale voltages are applied to the pixel electrodes 222, the pixel units display different brightness, so that different pictures are displayed, and normal display of the display device under the wide viewing angle and the narrow viewing angle is realized.

Fig. 21 is a schematic diagram of a display device according to a first embodiment of the present invention when displaying a logo. Fig. 22 is a schematic plan view of a display device according to a first embodiment of the present invention when the logo is displayed. As shown in fig. 16, 21 and 22, in the logo pattern display mode, the common electric signal Vcom is applied to the common viewing angle electrode 111, the third electric signal V3 is applied to the first logo pattern electrode bar 141, the fourth electric signal V4 is applied to the second logo pattern electrode bar 161, the voltage difference between the third electric signal V3 and the fourth electric signal V4 is greater than a fifth preset value (e.g., greater than 1.5V) and less than a sixth preset value (e.g., less than 10V), in this embodiment, the second preset value < the fifth preset value < the sixth preset value, the common electric signal Vcom and the fourth electric signal V4 are both 0V dc voltage, and the third electric signal V3 is an ac voltage of, for example, 5.8V. At this time, a large horizontal electric field (E5 in fig. 21) is formed between the first and second identification pattern electrode bars 141 and 161, and the positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected in the horizontal direction, so that the first liquid crystal layer 13 in the identification pattern region 110 has a phase retardation of λ/2, and the reflected light of the transflective layer 32 passes through the identification pattern region 110, thereby realizing the display of the identification pattern. Of course, a small vertical electric field (E4 in fig. 21) is also formed between the first identification pattern electrode bar 141 and the common viewing angle electrode 111, and the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected in the vertical direction, so that the vertical electric field is negligible. In other embodiments, the fourth electrical signal V4 may also be an ac voltage of opposite polarity to the third electrical signal V3, for example an ac voltage of-5.8V.

Fig. 23 is a schematic diagram of a display device in a specular reflection mode according to the first embodiment of the invention. As shown in fig. 16 and 23, in the specular reflection mode, the principle is similar to that of the logo pattern display mode. Specifically, the common electric signal Vcom is applied to all the common viewing angle electrodes 111, the third electric signal V3 is applied to all the first viewing angle electrodes 14, the fourth electric signal V4 is applied to all the second viewing angle electrodes 16, and the pressure difference between the third electric signal V3 and the fourth electric signal V4 is greater than a fifth preset value (e.g., greater than 1.5V) and less than a sixth preset value (e.g., less than 10V). In the present embodiment, the common electric signal Vcom and the fourth electric signal V4 are both 0V dc voltage, and the third electric signal V3 is, for example, 5.8V ac voltage. A large horizontal electric field (E5 in fig. 23) is formed between all the first viewing electrodes 14 and all the second viewing electrodes 16, all the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected greatly in the horizontal direction, and all the area first liquid crystal layer 13 has a phase retardation of λ/2, so that the reflected light of the transflective layer 32 passes through the logo pattern area 110 and the non-logo pattern area 120, and specular reflection is achieved. Of course, in other embodiments, the fourth electrical signal V4 may be an ac voltage having a polarity opposite to that of the third electrical signal V3, for example, an ac voltage of-5.8V.

Fig. 24 is a schematic diagram of a display device according to the first embodiment of the invention when the logo is displayed/specularly reflected. As shown in fig. 24, in the logo pattern display mode, the first liquid crystal layer 13 in the logo pattern area 110 has a lambda/2 effective phase retardation, and external ambient light forms linearly polarized light (0 °) parallel to the light transmission axis of the first polarizer 31 after passing through the first polarizer 31, and is deflected by 90 ° after passing through the first liquid crystal layer 13 having a lambda/2 phase retardation, so as to be parallel to the light reflection axis of the transflective layer 32 and reflected back by the transflective layer 32, and then is deflected by 90 ° after passing through the first liquid crystal layer 13 having a lambda/2 phase retardation, and passes through the first polarizer 31, so that the logo pattern area 110 assumes a bright state. Since the non-identification pattern region 120 does not form a fringe electric field, positive liquid crystal molecules in the first liquid crystal layer 13 maintain an initial state, external ambient light passes through the first polarizer 31 to form linearly polarized light parallel to the light transmission axis of the first polarizer 31, and after passing through the first liquid crystal layer 13, or linearly polarized light parallel to the light transmission axis of the first polarizer 31, all of the light passes through the transflective layer 32, and no light is reflected back by the transflective layer 32, so that the non-identification pattern region 120 presents a dark state. Similarly, the principle of the specular reflection mode is the same as that of the identification pattern region 110 identifying the pattern display mode, and a detailed description thereof will be omitted.

When the pattern display mode and the specular reflection mode are identified, the display box 20 and the backlight module 40 are turned off, and the display is realized by using the reflected light of the transflective layer 32. In the logo pattern display mode as well as the specular reflection mode, since the pictures at different times are substantially the same, the frequency of the third electric signal V3 may be lower, for example, 1Hz. And the wide view angle and the narrow view angle are distinguished from each other in each frame of picture, and the driving frequency of the first electric signal V1 and the second electric signal V2 is 60 Hz-150 Hz.

Example two

Fig. 22 is a schematic structural diagram of a second substrate in the second embodiment of the invention. As shown in fig. 22, the display panel, the display device and the driving method with switchable viewing angles in the second embodiment of the present invention are substantially the same as those in the first embodiment (fig. 1 to 24), except that:

the first viewing angle electrode 14 and the second viewing angle electrode 16 are located at the same layer, and the first signal electrode net 15 and the second signal electrode net 17 are located at the same layer. Since the first viewing angle electrode 14 and the second viewing angle electrode 16 are located at the same layer, the pitches between the common viewing angle electrode 111 and all the first viewing angle electrodes 14 and between the common viewing angle electrode 111 and all the second viewing angle electrodes 16 are the same, and the differential pressure between the common viewing angle electrode 111 and all the first viewing angle electrodes 14 and between the common viewing angle electrode 111 and all the second viewing angle electrodes 16 is not affected by the pitches, the same voltage signal is applied to the first viewing angle electrode 14 and the second viewing angle electrode 16 of the corresponding region in the full-screen wide viewing angle mode, the full-screen narrow viewing angle mode, and the region narrow viewing angle mode.

Those skilled in the art will understand that the other structures and working principles of the present embodiment are the same as those of the first embodiment, and will not be described herein.

Example III

Fig. 26 is a schematic diagram of a display device in an initial state according to the third embodiment of the present invention. As shown in fig. 26, the display panel, the display device and the driving method with switchable viewing angles in the third embodiment of the present invention are substantially the same as those in the first embodiment (fig. 1 to 24), except that:

the transflective layer 32 is a metal wire grid polarizer that is capable of transmitting light perpendicular to the wire grid and reflecting light parallel to the wire grid, i.e., a reflective polarizer is replaced by a metal wire grid polarizer.

Further, a compensation film 35 may be further provided between the dimming box 10 and the display box 20, and the compensation film 35 may be a viewing angle compensation film for compensating a narrow viewing angle or a brightness compensation film for compensating brightness.

In the present embodiment, since the transflective layer 32 adopts the metal wire grid polarizer, the metal wire grid polarizer is directly disposed on the side of the color film substrate 21 facing the second liquid crystal layer 23, so that the display panel is light and thin. Of course, in other embodiments, the metal wire grid polarizer is directly disposed on the side of the second substrate 12 facing the first liquid crystal layer 13.

Example IV

Fig. 27 is a schematic plan view of a display device according to a fourth embodiment of the present invention. Fig. 28 is a schematic plan view of a first viewing angle electrode according to a fourth embodiment of the present invention. Fig. 29 is a schematic plan view of a second viewing angle electrode according to a fourth embodiment of the present invention. The display panel, the display device and the driving method with switchable viewing angles in the fourth embodiment of the present invention are substantially the same as those in the first embodiment (fig. 1 to 24), except that in the present embodiment:

the display panel has two viewing angle switching regions 200, one of which 200 is rectangular and is located at one vertex angle of the display panel, and the other is the other 200. Similarly, the common viewing angle electrode 111 is also a pattern corresponding to the viewing angle switching region 200, so that the common viewing angle electrode 111 corresponds to the viewing angle switching region 200 one by one. The first viewing angle electrode 14 and the second viewing angle electrode 16 are also equally divided into two regions, the first viewing angle electrodes 14 in the adjacent two viewing angle switching regions 200 are insulated and spaced apart from each other, and the second viewing angle electrodes 16 in the adjacent two viewing angle switching regions 200 are insulated and spaced apart from each other. Wherein the identification pattern region 110 is located at the center of the display panel. Of course, the number and shape of the viewing angle switching regions 200 may be set according to actual needs, and not limited thereto, and when the number and shape of the viewing angle switching regions 200 are changed, the patterns of the common viewing angle electrode 111, the first viewing angle electrode 14, the first signal electrode net 15, the second viewing angle electrode 16, and the second signal electrode net 17 need to be changed.

Fig. 30 is a schematic plan view of a display device according to the present invention. Referring to fig. 30, the display device is provided with a display mode switching key 50 for a user to send a display mode switching request to the display device. In this embodiment, the display mode switching key 50 may be a physical key (as shown in fig. 30). Of course, in other embodiments, the display mode switching key 50 may also be a software control or Application (APP) to implement a switching function (e.g., setting the display mode by a slider bar). When a user needs to switch between a wide viewing angle, a narrow viewing angle and a sleep mode, a viewing angle switching request can be sent to the display device by operating the viewing angle switching key 50, and finally different electric signals are applied to the common viewing angle electrode 111, the first viewing angle electrode 14 and the second viewing angle electrode 16 under the control of the driving chip 60, so that the display device can realize the switching between the wide viewing angle and the narrow viewing angle. Therefore, the display device provided by the embodiment of the invention has stronger operation flexibility and convenience, and achieves the aim of integrating entertainment video and privacy confidentiality.

In this document, terms such as up, down, left, right, front, rear, etc. are defined by the positions of the structures in the drawings and the positions of the structures with respect to each other, for the sake of clarity and convenience in expressing the technical solution. It should be understood that the use of such orientation terms should not limit the scope of the claimed application. It should also be understood that the terms "first" and "second," etc., as used herein, are used merely for distinguishing between names and not for limiting the number and order.

The present application is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present application.

Claims

1. The display panel with the switchable partitioned wide and narrow viewing angles is characterized by comprising a display box (20) and a light regulating box (10) which is laminated on the light emitting side of the display box (20), wherein a first polaroid (31) is arranged on one side, far away from the display box (20), of the light regulating box (10), a transparent reflecting layer (32) is arranged between the light regulating box (10) and the display box (20), a second polaroid (33) is arranged on one side, far away from the light regulating box (10), of the display box (20), the light transmitting shaft of the first polaroid (31) is parallel to the light transmitting shaft of the transparent reflecting layer (32), the light transmitting shaft of the second polaroid (33) is perpendicular to the light transmitting shaft of the transparent reflecting layer (32), and the light reflecting shaft of the transparent reflecting layer (32) is perpendicular to the light transmitting shaft of the transparent reflecting layer (32).

The display panel is provided with a graphical identification pattern area (110), a non-identification pattern area (120) and a plurality of view angle switching areas (200), wherein the identification pattern area (110) is at least positioned in one view angle switching area (200), and all areas except the identification pattern area (110) in the view angle switching area (200) are the non-identification pattern areas (120);

the light regulating box (10) comprises a first substrate (11), a second substrate (12) which is opposite to the first substrate (11) and a first liquid crystal layer (13) which is arranged between the first substrate (11) and the second substrate (12), a plurality of common viewing angle electrodes (111) which are in one-to-one correspondence with the viewing angle switching areas (200) are arranged on one side of the first substrate (11) which faces the first liquid crystal layer (13), a first viewing angle electrode (14) and a second viewing angle electrode (16) which are matched with the common viewing angle electrode (111) are arranged on one side of the second substrate (12) which faces the first liquid crystal layer (13), the first viewing angle electrode (14) and the second viewing angle electrode (16) are mutually insulated and spaced, a first identification pattern strip (141) and a second identification pattern strip (142) which are mutually insulated, the first viewing angle electrode (14) and the second identification pattern strip (161) are mutually insulated and are mutually spaced, the first viewing angle electrode (14) and the second viewing angle electrode (16) are mutually insulated and spaced, the first non-identification pattern electrode strips (142) and the second non-identification pattern electrode strips (162) correspond to the non-identification pattern region (120), and the projections of the first identification pattern electrode strips (141) and the second identification pattern electrode strips (161), the first non-identification pattern electrode strips (142) and the second non-identification pattern electrode strips (162) on the second substrate (12) are parallel to each other and are alternately distributed.

2. The display panel with switchable viewing angles according to claim 1, wherein a first signal electrode network (15) and a second signal electrode network (17) are further arranged on a side of the second substrate (12) facing the first liquid crystal layer (13), the first signal electrode network (15) and the first viewing angle electrode (14) are positioned on different layers, the second signal electrode network (17) and the second viewing angle electrode (16) are positioned on different layers, and the first signal electrode network (15) and the second signal electrode network (17) are insulated from each other;

the first signal electrode network (15) comprises a first identification pattern electrode network (151) electrically connected with the first identification pattern electrode strip (141) and a first non-identification pattern electrode network (152) electrically connected with the first non-identification pattern electrode strip (142), the second signal electrode network (17) comprises a second identification pattern electrode network (171) electrically connected with the second identification pattern electrode strip (161) and a second non-identification pattern electrode network (172) electrically connected with the second non-identification pattern electrode strip (162), the first identification pattern electrode network (151) and the second identification pattern electrode network (171) are both located in the identification pattern region (110), and the first non-identification pattern electrode network (152) and the second non-identification pattern electrode network (172) are both located in the non-identification pattern region (120).

3. The display panel with switchable viewing angles according to claim 2, wherein the side of the second substrate (12) facing the first liquid crystal layer (13) is further provided with the first identification pattern signal line (153) and the first non-identification pattern signal line (154), one end of the first identification pattern signal line (153) is electrically connected with the first identification pattern electrode network (151), the other end of the first identification pattern signal line (153) extends to the edge of the second substrate (12), one end of the first non-identification pattern signal line (154) is electrically connected with the first non-identification pattern electrode network (152), and the other end of the first non-identification pattern signal line (154) extends to the edge of the second substrate (12);

the second substrate (12) is further provided with a second identification pattern signal wire (173) and a second non-identification pattern signal wire (174) towards one side of the first liquid crystal layer (13), one end of the second identification pattern signal wire (173) is electrically connected with the second identification pattern electrode net (171), the other end of the second identification pattern signal wire (173) extends to the edge of the second substrate (12), one end of the second non-identification pattern signal wire (174) is electrically connected with the second non-identification pattern electrode net (172), and the other end of the second non-identification pattern signal wire (174) extends to the edge of the second substrate (12).

4. The partitioned wide-narrow viewing angle switchable display panel according to claim 2, wherein the first viewing angle electrode (14) and the second viewing angle electrode (16) are located at different layers, the first signal electrode network (15) and the second signal electrode network (17) are located at different layers, and the second signal electrode network (17), the second viewing angle electrode (16), the first signal electrode network (15) and the first viewing angle electrode (14) are sequentially arranged in a direction toward the first liquid crystal layer (13);

alternatively, the first viewing angle electrode (14) and the second viewing angle electrode (16) are located on the same layer, and the first signal electrode network (15) and the second signal electrode network (17) are located on the same layer.

5. The partitioned wide and narrow viewing angle switchable display panel according to claim 2, wherein the projections of the grid lines in the first signal electrode network (15) and the second signal electrode network (17) on the second substrate (12) are staggered with respect to each other.

6. The segmented wide and narrow viewing angle switchable display panel according to any one of claims 1 to 5, wherein the transflective layer (32) is a reflective polarizer or a metal wire grid polarizer.

7. A display device, characterized by comprising a backlight module (40) and a display panel with switchable partitioned wide and narrow viewing angles according to any one of claims 1-6, wherein the display panel is located at a light emitting side of the backlight module (40), and the backlight module (40) and the viewing angle switching area (200) are in one-to-one correspondence with a plurality of dimming areas (401), and the dimming areas (401) emit light independently.

8. A driving method of a display device, wherein the driving method is for driving the display device according to claim 7, the driving method comprising:

in a full-screen wide viewing angle mode, applying a common electrical signal (Vcom) to all the common viewing angle electrodes (111), applying a first electrical signal (V1) to all the first viewing angle electrodes (14) and all the second viewing angle electrodes (16), a pressure difference between the first electrical signal (V1) and the common electrical signal (Vcom) being greater than a first preset value or less than a second preset value;

in a full-screen narrow viewing angle mode, applying a common electrical signal (Vcom) to all the common viewing angle electrodes (111), applying a second electrical signal (V2) to all the first viewing angle electrodes (14) and all the second viewing angle electrodes (16), a pressure difference between the second electrical signal (V2) and the common electrical signal (Vcom) being greater than a third preset value and less than a fourth preset value;

in the area narrow viewing angle mode, reducing the light emitting brightness of a dimming area (401) corresponding to the narrow viewing angle area, applying a common electric signal (Vcom) to the common viewing angle electrode (111) in the narrow viewing angle area, and applying a second electric signal (V2) to both the first viewing angle electrode (14) in the narrow viewing angle area and the second viewing angle electrode (16) in the narrow viewing angle area, wherein the voltage difference between the second electric signal (V2) and the common electric signal (Vcom) is larger than a third preset value and smaller than a fourth preset value;

In a logo pattern display mode, applying a common electric signal (Vcom) to all the common viewing angle electrodes (111), applying a third electric signal (V3) to the first logo pattern electrode bar (141), applying a fourth electric signal (V4) to the second logo pattern electrode bar (161), and a pressure difference between the third electric signal (V3) and the fourth electric signal (V4) is greater than a fifth preset value and less than a sixth preset value;

wherein, when in the full-screen wide view angle mode, the full-screen narrow view angle mode and the area narrow view angle mode, the backlight module (40) and the display box (20) are both in an open state, and when in the identification pattern display mode, the backlight module (40) and the display box (20) are both in a closed state; the second preset value is less than the third preset value, less than the fourth preset value, less than the first preset value, and less than the fifth preset value, less than the sixth preset value.

9. The driving method of a display panel according to claim 8, further comprising:

in specular reflection mode, applying a common electrical signal (Vcom) to all of the common viewing angle electrodes (111), applying a third electrical signal (V3) to all of the first viewing angle electrodes (14), applying a fourth electrical signal (V4) to all of the second viewing angle electrodes (16), a pressure difference between the third electrical signal (V3) and the fourth electrical signal (V4) being greater than a fifth preset value and less than a sixth preset value;

In the specular reflection mode, the backlight module (40) and the display box (20) are both in a closed state.

10. The driving method of a display panel according to claim 8, further comprising:

in the region omnibearing black peep-proof mode, applying a common electric signal (Vcom) to the common viewing angle electrode (111) in the omnibearing black peep-proof region, applying a third electric signal (V3) to the first identification pattern electrode strip (141) in the omnibearing black peep-proof region, and applying a fourth electric signal (V4) to the second identification pattern electrode strip (161) in the omnibearing black peep-proof region, wherein the pressure difference between the third electric signal (V3) and the fourth electric signal (V4) is larger than a fifth preset value and smaller than a sixth preset value;

wherein, in the region omnibearing black peep-proof mode, the backlight module (40) and the display box (20) are both in an open state.