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

Abstract

A display panel with switchable wide and narrow viewing angles, a driving method thereof, and a display device. The display panel includes a dimming box and a display box. A first polarizer and a transflective film are respectively disposed on the upper and lower sides of the dimming box, and the transmission axes of the first polarizer and the transflective film are parallel to each other. The display panel has an identification pattern area and a non-identification pattern area. The dimming box includes a first substrate, a second substrate, and a first liquid crystal layer. The first substrate is provided with a common viewing angle electrode, and the second substrate is provided with a first viewing angle electrode and a second viewing angle electrode. The first viewing angle electrode includes a first identification pattern electrode strip and a first non-identification pattern electrode, and the second viewing angle electrode includes a second identification pattern electrode strip. Both the first identification pattern electrode strip and the second identification pattern electrode strip correspond to the identification pattern area, and their projections on the second substrate are parallel to each other and alternately distributed. The first non-identification pattern electrode corresponds to the non-identification pattern area. The identification pattern is displayed by the ambient light reflected by the transflective film to save power consumption.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal display, and particularly to a display panel with switchable wide and narrow viewing angles, a driving method, and a display device. Background Art

[0002] With the continuous progress of liquid crystal display technology, the viewing angle of a display has been widened from about 112° to more than 160°. While people enjoy the visual experience brought by a large viewing angle, they also hope to effectively protect business secrets and personal privacy to avoid commercial losses or embarrassment caused by the leakage of screen information. Therefore, in addition to the need for a wide viewing angle, in many cases, a display device is also required to have the function of switching between wide and narrow viewing angles.

[0003] Currently, a light modulation box and a display box are mainly used to switch between a wide viewing angle and a narrow viewing angle. The display box is used to control normal image display, and the light modulation box is used to control viewing angle switching. The light modulation box includes a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate. The viewing angle control electrodes on the first substrate and the second substrate apply a vertical electric field to the liquid crystal molecules, causing the liquid crystal to deflect in the vertical direction to achieve a narrow viewing angle mode. By controlling the voltage on the viewing angle control electrodes, switching between a wide viewing angle and a narrow viewing angle can be achieved. To enhance the competitiveness of products, in the prior art, when the display panel displays an image in a narrow viewing angle, the LOGO (trademark) pattern of the product can still be seen prominently. However, in the prior art, the LOGO pattern can only be seen in a large viewing angle of the narrow viewing angle display, and the backlight and the display box need to be turned on to see the LOGO pattern, resulting in high power consumption. Summary of the Invention

[0004] In order to overcome the disadvantages and deficiencies existing in the prior art, the purpose of the present invention is to provide a display panel with switchable wide and narrow viewing angles, a driving method, and a display device, so as to realize that when the display panel enters the sleep mode, the LOGO pattern is realized by ambient light reflection, saving power while realizing diversified functions and enhancing the competitiveness of products.

[0005] The present invention provides a display panel with switchable wide and narrow viewing angles. The display panel includes a display cell and a dimming cell stacked on the light-emitting side of the display cell. A first polarizer is provided on the side of the dimming cell away from the display cell. A transflective film is provided between the dimming cell and the display cell. A second polarizer is provided on the side of the display cell away from the dimming cell. The transmission axis of the first polarizer is parallel to the transmission axis of the transflective film. The transmission axis of the second polarizer is perpendicular to the transmission axis of the transflective film. The reflection axis of the transflective film is perpendicular to the transmission axis of the transflective film. The display panel has a patterned identification pattern area and a non-identification pattern area. The dimming cell includes a first substrate, a second substrate disposed opposite to the first substrate, and a first liquid crystal layer disposed between the first substrate and the second substrate. A common viewing angle electrode is provided on the side of the first substrate facing the first liquid crystal layer. A first viewing angle electrode and a second viewing angle electrode that cooperate with the common viewing angle electrode are provided on the side of the second substrate facing the first liquid crystal layer. The first viewing angle electrode and the second viewing angle electrode are insulated from each other and spaced apart. The first viewing angle electrode includes a first identification pattern electrode strip and a first non-identification pattern electrode. The second viewing angle electrode includes a second identification pattern electrode strip. The first identification pattern electrode strip and the second identification pattern electrode strip both correspond to the identification pattern area. The first non-identification pattern electrode corresponds to the non-identification pattern area. The projections of the first identification pattern electrode strip and the second identification pattern electrode strip on the second substrate are parallel to each other and alternately distributed.

[0006] Further, the first non-identification pattern electrode is a block electrode corresponding to the non-identification pattern area; or, the first non-identification pattern electrode includes a plurality of first electrode strips, the second viewing angle electrode further includes a second non-identification pattern electrode corresponding to the non-identification pattern area, the second non-identification pattern electrode includes a plurality of second electrode strips, and the projections of the first electrode strips and the second electrode strips on the second substrate are parallel to each other and alternately distributed.

[0007] Further, the display panel further has a patterned clock pattern area. The clock pattern area includes a plurality of independent stroke areas. The first viewing angle electrode further includes a first clock control electrode strip. The second viewing angle electrode further includes a second clock control electrode strip. The first clock control electrode strip and the second clock control electrode strip both correspond to the clock pattern area, and the projections on the second substrate are parallel to each other and alternately distributed. The first clock control electrode strips in adjacent stroke areas are insulated from each other. The second clock control electrode strips in adjacent stroke areas are insulated from each other.

[0008] Further, a first signal electrode network is also provided on one side of the second substrate facing the first liquid crystal layer, and the first signal electrode network and the first viewing angle electrode are located in different layers; the first signal electrode network includes a first identification pattern electrode network, a first non-identification pattern electrode network, a first clock pattern electrode network, a first identification pattern signal line, and a first clock pattern signal line. The first identification pattern electrode network corresponds to the identification pattern area, the first non-identification pattern electrode network corresponds to the non-identification pattern area, and the first clock pattern electrode network corresponds to the clock pattern area. The first identification pattern electrode strip is electrically connected to the first identification pattern electrode network, the first clock control electrode strip is electrically connected to the first clock pattern electrode network, one end of the first identification pattern signal line is electrically connected to 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 clock pattern signal line is electrically connected to the first clock pattern electrode network, and the other end of the first clock pattern signal line extends to the edge of the second substrate. The first clock pattern electrode networks in adjacent stroke areas are insulated from each other, and one first clock pattern signal line is correspondingly provided in each stroke area.

[0009] Further, the first viewing angle electrode and the second viewing angle electrode are located in different layers. A second signal electrode network is also provided on one side of the second substrate facing the first liquid crystal layer. 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 the direction facing the first liquid crystal layer. The second signal electrode network includes a second identification pattern electrode network, a second non-identification pattern electrode network, a second clock pattern electrode network, a second identification pattern signal line, and a second clock pattern signal line. The second identification pattern electrode network corresponds to the identification pattern area, the second non-identification pattern electrode network corresponds to the non-identification pattern area, and the second clock pattern electrode network corresponds to the clock pattern area. The second identification pattern electrode strip is electrically connected to the second identification pattern electrode network, the second clock control electrode strip is electrically connected to the second clock pattern electrode network, one end of the second identification pattern signal line is electrically connected to the second identification pattern electrode network, the other end of the second identification pattern signal line extends to the edge of the second substrate, one end of the second clock pattern signal line is electrically connected to the second clock pattern electrode network, and the other end of the second clock pattern signal line extends to the edge of the second substrate. The second clock pattern electrode networks in adjacent stroke areas are insulated from each other, and one second clock pattern signal line is correspondingly provided in each stroke area.

[0010] Further, the projections of the grid lines in the first signal electrode network and the second signal electrode network on the second substrate are staggered from each other.

[0011] The present application also provides a driving method for a display panel, which is used to drive the above-mentioned display panel with switchable wide and narrow viewing angles. The driving method includes: in the wide viewing angle mode, applying a common electrical signal to the common viewing angle electrode, and applying a first electrical signal to the entire first viewing angle electrode and the entire second viewing angle electrode. The pressure difference between the first electrical signal and the common electrical signal is less than a first preset value or greater than a second preset value; in the narrow viewing angle mode, applying a common electrical signal to the common viewing angle electrode, and applying a second electrical signal to the entire first viewing angle electrode and the entire second viewing angle electrode. The pressure difference between the second electrical signal and the common electrical signal is greater than a third preset value and less than a fourth preset value; in the identification pattern display mode, applying a common electrical signal to the common viewing angle electrode, applying a third electrical signal to the first identification pattern electrode strip, and applying a fourth electrical signal to the second identification pattern electrode strip. The pressure difference between the third electrical signal and the fourth electrical signal is greater than a fifth preset value and less than a sixth preset value; wherein, in the wide viewing angle mode and the narrow viewing angle mode, the display cell is in an open state, and in the identification pattern display mode, the display cell is in a closed state; the first preset value < the third preset value < the fourth preset value < the second preset value, and the first preset value < the fifth preset value < the sixth preset value.

[0012] Further, the display panel further has a patterned clock pattern area, the clock pattern area includes a plurality of independent stroke areas, the first viewing angle electrode further includes a first clock control electrode strip, the second viewing angle electrode further includes a second clock control electrode strip, the first clock control electrode strip and the second clock control electrode strip both correspond to the clock pattern area, and their projections on the second substrate are parallel and alternately distributed. The first clock control electrode strips in adjacent stroke areas are insulated from each other, and the second clock control electrode strips in adjacent stroke areas are insulated from each other. The driving method further includes: in the clock display mode, applying a common electrical signal to the common viewing angle electrode, applying a third electrical signal to the first clock control electrode strip in the corresponding stroke area, and applying a fourth electrical signal to the second clock control electrode strip in the corresponding stroke area. The pressure difference between the third electrical signal and the fourth electrical signal is greater than a fifth preset value and less than a sixth preset value; wherein, in the clock display mode, the display cell is in a closed state, and the identification pattern display mode and the clock display mode can be displayed simultaneously.

[0013] Further, the first non-identification pattern electrode includes a plurality of first electrode strips, the second viewing angle electrode further includes a second non-identification pattern electrode corresponding to the non-identification pattern area, the second non-identification pattern electrode includes a plurality of second electrode strips, the projections of the first electrode strips and the second electrode strips on the second substrate are parallel and alternately distributed. The driving method further includes: in the specular reflection mode, applying a common electrical signal to the common viewing angle electrode, applying a third electrical signal to the entire first viewing angle electrode, and applying a fourth electrical signal to the entire second viewing angle electrode. The pressure difference between the third electrical signal and the fourth electrical signal is greater than a fifth preset value and less than a sixth preset value; wherein, in the specular reflection mode, the display cell is in a closed state.

[0014] The present application also provides a display device, including the display panel with switchable wide and narrow viewing angles as described above.

[0015] The beneficial effects of the present invention are as follows: By providing a transflective film between the dimming box and the display box, and providing a first identification pattern electrode strip and a second identification pattern electrode strip on the second substrate, the projections of the first identification pattern electrode strip and the second identification pattern electrode strip on the second substrate are parallel to each other and alternately distributed. Therefore, by controlling the pressure difference between the first identification pattern electrode strip and the second identification pattern electrode strip, an edge electric field can be formed to control the deflection of liquid crystal molecules in the first liquid crystal layer in the horizontal direction, so that the reflected light of the transflective film passes through the identification pattern area to realize the display of the identification pattern, and the identification pattern can also be seen from the front view angle. When displaying the identification pattern, there is no need for a backlight source and to open the display box, which can save power consumption. In addition, by controlling the pressure difference between the common viewing angle electrode and the first viewing angle electrode and between the common viewing angle electrode and the second viewing angle electrode, a vertical electric field can be formed to control the deflection of liquid crystal molecules in the first liquid crystal layer in the vertical direction, so as to realize the control of the switching between wide and narrow viewing angles. Moreover, the display of wide and narrow viewing angles and the display of the identification pattern are independent of each other and do not interfere with each other. Description of the Drawings

[0016] Figure 1 is a schematic plan view of the display device in Embodiment 1 of the present invention;

[0017] Figure 2 is a schematic structural view of the display device in the initial state in Embodiment 1 of the present invention;

[0018] Figure 3 is a schematic structural view of the second substrate in Embodiment 1 of the present invention;

[0019] Figure 4 is a schematic plan view of the first viewing angle electrode in Embodiment 1 of the present invention;

[0020] Figure 5 is a schematic plan view of the first signal electrode network in Embodiment 1 of the present invention;

[0021] Figure 6 is a partial schematic plan view of the first clock pattern electrode network in Embodiment 1 of the present invention;

[0022] Figure 7 is a schematic plan view of the second viewing angle electrode in Embodiment 1 of the present invention;

[0023] Figure 8 is a schematic plan view of the second signal electrode network in Embodiment 1 of the present invention;

[0024] Figure 9 It is a partial planar structure schematic diagram of the second clock pattern electrode network in the first embodiment of the present invention;

[0025] Figure 10 It is one of the signal waveform diagrams of the display device in the wide viewing angle in the first embodiment of the present invention;

[0026] Figure 11 It is one of the structure schematic diagrams of the display device in the wide viewing angle in the first embodiment of the present invention;

[0027] Figure 12 It is the second signal waveform diagram of the display device in the wide viewing angle in the first embodiment of the present invention;

[0028] Figure 13 It is the second structure schematic diagram of the display device in the wide viewing angle in the first embodiment of the present invention;

[0029] Figure 14 It is the simulation diagram of the viewing angle and light transmittance of the display device in the wide viewing angle in the first embodiment of the present invention and the prior art;

[0030] Figure 15 It is the signal waveform diagram of the display device in the narrow viewing angle in the first embodiment of the present invention;

[0031] Figure 16 It is the structure schematic diagram of the display device in the narrow viewing angle in the first embodiment of the present invention;

[0032] Figure 17 It is the simulation diagram of the viewing angle and light transmittance of the display device in the narrow viewing angle in the first embodiment of the present invention and the prior art;

[0033] Figure 18 It is the signal waveform diagram of the display device in the sleep mode in the first embodiment of the present invention;

[0034] Figure 19 It is the structure schematic diagram of the display device in the identification pattern display / clock display in the first embodiment of the present invention;

[0035] Figure 20 It is the structure schematic diagram of the display device in the specular reflection in the first embodiment of the present invention;

[0036] Figure 21 It is the principle schematic diagram of the display device in the identification pattern display / clock display / specular reflection in the first embodiment of the present invention;

[0037] Figure 22 It is the structure schematic diagram of the second substrate in the second embodiment of the present invention;

[0038] Figure 23 It is the planar structure schematic diagram of the display device in the present invention. Detailed implementation manners

[0039] To further illustrate the technical means and effects adopted by the present invention to achieve the intended invention purpose, the following, in combination with the accompanying drawings and preferred embodiments, details the specific implementation manners, structures, features and effects of the display panel with switchable wide and narrow viewing angles, the driving method, and the display device according to the present invention as follows:

[0040] [Embodiment 1]

[0041] Figure 1 It is a schematic plan view of the display device in Embodiment 1 of the present invention. Figure 2 It is a schematic structural view of the display device in the initial state in Embodiment 1 of the present invention. Figure 3 It is a schematic structural view of the second substrate in Embodiment 1 of the present invention. Figure 4 It is a schematic plan view of the first viewing angle electrode in Embodiment 1 of the present invention. Figure 5 It is a schematic plan view of the first signal electrode network in Embodiment 1 of the present invention. Figure 6 It is a partial schematic plan view of the first clock pattern electrode network in Embodiment 1 of the present invention. Figure 7 It is a schematic plan view of the second viewing angle electrode in Embodiment 1 of the present invention. Figure 8 It is a schematic plan view of the second signal electrode network in Embodiment 1 of the present invention. Figure 9 It is a partial schematic plan view of the second clock pattern electrode network in Embodiment 1 of the present invention.

[0042] As Figures 1 to 9 shown, a display panel with switchable wide and narrow viewing angles provided in Embodiment 1 of the present invention. As Figure 1 shown, the display panel has a patterned logo pattern area 110 and a non-logo pattern area 120. The pattern of the logo pattern area 110 can be set according to the actual logo pattern to be displayed (in this embodiment, the letter "V" is used as the logo pattern to be displayed in the logo pattern area 110). It can be understood that the display panel has a display area and a non-display area, and both the logo pattern area 110 and the non-logo pattern area 120 are located in the display area, so as to display the logo pattern.

[0043] As Figure 2 and Figure 3As shown in the figure, the display panel includes a dimming box 10 and a display box 20 which are stacked on top of each other. 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 to control the switching of the wide and narrow viewing angles of the display panel, and the display box 20 is used to control the display of a normal picture on the display panel. A first polarizer 31 is provided on the side of the dimming box 10 away from the display box 20, a semi-transmissive semi-reflective film 32 is provided between the dimming box 10 and the display box 20, and a second polarizer 33 is provided on the side of the display box 20 away from the dimming box 10. The semi-transmissive semi-reflective film 32 has a reflective axis and a transmissive axis, the reflective axis of the semi-transmissive semi-reflective film 32 is perpendicular to the transmissive axis of the semi-transmissive semi-reflective film 32, the transmissive axis of the first polarizer 31 is parallel to the transmissive axis of the semi-transmissive semi-reflective film 32, and the transmissive axis of the second polarizer 33 is perpendicular to the transmissive axis of the semi-transmissive semi-reflective film 32. For example, the transmissive axes of the first polarizer 31 and the semi-transmissive semi-reflective film 32 are, for example, 0°, the reflective axis of the semi-transmissive semi-reflective film 32 is 90°, and the transmissive axis of the second polarizer 33 is 90°. Among them, the semi-transmissive semi-reflective film 32 is, for example, an APF polarizer. Further, a third polarizer 34 can also be provided on the side of the display box 20 close to the dimming box, and the transmissive axis of the third polarizer 34 is parallel to the transmissive axis of the semi-transmissive semi-reflective film 32.

[0044] The dimming box 10 includes a first substrate 11, a second substrate 12 disposed opposite to the first substrate 11, and a first liquid crystal layer 13 disposed between the first substrate 11 and the second substrate 12. A common viewing angle electrode 111 is provided on the side of the first substrate 11 facing the first liquid crystal layer 13, a first viewing angle electrode 14 and a second viewing angle electrode 16 that cooperate with the common viewing angle electrode 111 are provided on the side of the second substrate 12 facing the first liquid crystal layer 13, and the first viewing angle electrode 14 and the second viewing angle electrode 16 are insulated from each other and spaced apart. By controlling the pressure 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, a vertical electric field is formed to control the deflection of the liquid crystal molecules in the first liquid crystal layer 13 in the vertical direction, thereby realizing the control of the switching of the wide and narrow viewing angles.

[0045] Further, as Figure 2 , Figure 3 , Figure 4 and Figure 7As shown, the first-view electrode 14 includes a first identification pattern electrode strip 141 and a first non-identification pattern electrode 142, and the second-view electrode 16 includes a second identification pattern electrode strip 161. Both the first identification pattern electrode strip 141 and the second identification pattern electrode strip 161 correspond to the identification pattern area 110, and the first non-identification pattern electrode 142 corresponds to the non-identification pattern area 120. The projections of the first identification pattern electrode strip 141 and the second identification pattern electrode strip 161 on the second substrate 12 are parallel to each other and alternately distributed, that is, the first identification pattern electrode strip 141 and the second identification pattern electrode strip 161 are parallel to each other and alternately distributed in the identification pattern area 110. By controlling the pressure difference between the first identification pattern electrode strip 141 and the second identification pattern electrode strip 161, an edge electric field is formed to control the deflection of liquid crystal molecules in the corresponding identification pattern area 110 of the first liquid crystal layer 13 in the horizontal direction, so that the reflected light of the transflective film 32 passes through the identification pattern area 110, realizing the display of the identification pattern, and the identification pattern can also be seen from the front view angle; when displaying the identification pattern, there is no need for a backlight source and opening the display box, and power consumption can also be saved. It can be understood that the first identification pattern electrode strip 141 and the first non-identification pattern electrode 142 in the first-view electrode 14 are insulated from each other, so different electrical signals can be applied. Multiple first identification pattern electrode strips 141 are electrically connected to the first identification pattern electrode network 151 through punching, and the signals are the same; multiple second identification pattern electrode strips 161 are electrically connected to the first identification pattern electrode network 171 through punching, and the signals are the same.

[0046] In this embodiment, the first non-identification pattern electrode 142 includes a plurality of first electrode strips, the second-view electrode 16 further includes a second non-identification pattern electrode 162 corresponding to the non-identification pattern area 120, the second non-identification pattern electrode 162 includes a plurality of second electrode strips, and the projections of the first electrode strips and the second electrode strips on the second substrate 12 are parallel to each other and alternately distributed, that is, the first electrode strips and the second electrode strips are parallel to each other and alternately distributed in the non-identification pattern area 120. Therefore, the pressure difference between the first identification pattern electrode strip 141 and the second identification pattern electrode strip 161 and the pressure difference between the first electrode strip and the second electrode strip can also be controlled to form an edge electric field and control 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 film 32 passes through the identification pattern area 110 and the non-identification pattern area 120 to achieve the effect of specular reflection.

[0047] As Figure 1 , Figure 4 and Figure 7As shown, the display panel further has a graphical clock pattern area 130. The clock pattern area 130 includes a plurality of independent stroke areas and is used to display time in the sleep mode. In this embodiment, the clock pattern area 130 is composed of four digits '8' and a colon. Each digit '8' is composed of 7 independent stroke areas, such as 3 horizontal strokes and 4 vertical strokes. The dark state and bright state in each stroke area can be controlled independently, so that the digit '8' can present any digit from 0 to 9. Reference can be made to Figure 6 and Figure 9 . Since the colon is displayed and extinguished simultaneously and can be regarded as a stroke area, and both the upper and lower layer signals can be independently controlled, therefore, the clock pattern area 130 has a total of 58 independent stroke areas, and the background area of the clock display area 130 can also be independently controlled.

[0048] The first viewing angle electrode 14 further includes a first clock control electrode strip 143, and the second viewing angle electrode 16 further includes a second clock control electrode strip 163. Both the first clock control electrode strip 143 and the second clock control electrode strip 163 correspond to the clock pattern area 130. The projections of the first clock control electrode strip 143 and the second clock control electrode strip 163 on the second substrate 12 are parallel to each other and alternately distributed, that is, the first clock control electrode strip 143 and the second clock control electrode strip 163 are parallel to each other and alternately distributed within the clock pattern area 130. It can be understood that the adjacent first clock control electrode strips 143 in the adjacent stroke areas are insulated from each other, and the adjacent second clock control electrode strips 163 in the adjacent stroke areas are insulated from each other, so that the dark state and bright state in each stroke area can be controlled independently. Therefore, by controlling the pressure difference between the first clock control electrode strip 143 and the second clock control electrode strip 163, an edge electric field can be formed to control the deflection of the liquid crystal molecules in the corresponding clock pattern area 130 in the first liquid crystal layer 13 in the horizontal direction, so that the reflected light of the transflective film 32 passes through the clock pattern area 130 to realize the display of the clock pattern; and when displaying the clock pattern, there is no need for a backlight and to open the display box, which can also save power consumption.

[0049] Furthermore, as Figure 3 shown, the widths a of the first identification pattern electrode strip 141, the second identification pattern electrode strip 161, the first clock control electrode strip 143, the second clock control electrode strip 163, the first electrode strip and the second electrode strip are 2 - 4 μm, for example 3.5 μm. The pitches b between two adjacent first identification pattern electrode strips 141, between two adjacent second identification pattern electrode strips 161, between two adjacent first clock control electrode strips 143, between two adjacent second clock control electrode strips 163, between two adjacent first electrode strips and between two adjacent second electrode strips are 4 - 6 μm, for example 5.5 μm. Reference Figure 6 andFigure 9 In Figure 9 , the width of each stroke area in the clock pattern area 130 is 2 mm. The middle area of the number "8" is a square with a side length of 5 mm. The distance between two adjacent numbers "8" is 4.5 mm. The height of the entire clock pattern area 130 is 20 mm. Therefore, approximately 200 first clock control electrode strips 143 and second clock control electrode strips 163 are provided in each stroke area. Of course, in practical applications, the size of the clock pattern area 130 can be adjusted according to actual needs.

[0050] As Figure 1 , Figure 3 , Figure 5 and Figure 6 shown, on the side of the second substrate 12 facing the first liquid crystal layer 13, a first signal electrode mesh 15 is further provided. The first signal electrode mesh 15 and the first viewing angle electrode 14 are located on different layers and are spaced apart from each other by an insulating layer. The first signal electrode mesh 15 is cross-connected with the first viewing angle electrode 14 in a diamond shape throughout the display area. The first viewing angle electrode 14 and the first signal electrode mesh 15 are electrically connected through a punched hole, and the signals are the same.

[0051] The first signal electrode mesh 15 includes a first identification pattern electrode mesh 151, a first non-identification pattern electrode mesh 152, a first clock pattern electrode mesh 153, a first identification pattern signal line 154, and a first clock pattern signal line 155. The first identification pattern electrode mesh 151 corresponds to the identification pattern area 110, the first non-identification pattern electrode mesh 152 corresponds to the non-identification pattern area 120, and the first clock pattern electrode mesh 153 corresponds to the clock pattern area 130.

[0052] The first identification pattern electrode strip 141 is electrically connected to the first identification pattern electrode mesh 151 through a contact hole. One end of the first identification pattern signal line 154 is electrically connected to the first identification pattern electrode mesh 151, and the other end of the first identification pattern signal line 154 extends to the edge of the second substrate 12, so as to apply an electrical signal to the first identification pattern electrode strip 141 through the first identification pattern signal line 154. The first clock control electrode strip 143 is electrically connected to the first clock pattern electrode mesh 153 through a contact hole. One end of the first clock pattern signal line 155 is electrically connected to the first clock pattern electrode mesh 153, and the other end of the first clock pattern signal line 155 extends to the edge of the second substrate 12, so as to apply an electrical signal to the first clock control electrode strip 143 through the first clock pattern signal line 155.

[0053] As Figure 5 and Figure 6 shown, the first clock pattern electrode meshes 153 in adjacent stroke areas are insulated from each other, and each stroke area is correspondingly provided with a first clock pattern signal line 155. Figure 5Only the first clock pattern signal line 155 corresponding to a partial stroke area is shown, and specifically, reference can be made to Figure 6 . Each digit "8" is composed of 7 mutually independent stroke areas. Therefore, 7 first clock pattern signal lines 155 are correspondingly provided for each digit "8", so that electrical signals can be separately applied to each stroke area. Since the colon is simultaneously displayed and extinguished and can be regarded as one stroke area, only one first clock pattern signal line 155 needs to be set, and the upper and lower layer signals can be independently controlled. Therefore, a total of 58 first clock pattern signal lines 155 are required to apply electrical signals to the clock pattern area 130, and the background area corresponding to the clock area 130 can also be independently controlled.

[0054] In this embodiment, the first non-identification pattern electrode 142 and the first non-identification pattern electrode grid 152 are insulated from each other, and electrical signals can be directly applied to the first non-identification pattern electrode 142 from the edge of the second substrate 12. The non-identification pattern area 120 is also correspondingly provided with the first non-identification pattern electrode grid 152, which can increase the display uniformity. Of course, in other embodiments, the first non-identification pattern electrode 142 can also be electrically connected to the first non-identification pattern electrode grid 152 through a contact hole, so as to apply electrical signals to the first non-identification pattern electrode 142 through the first non-identification pattern electrode grid 152.

[0055] As Figure 2 、 Figure 3 、 Figure 8 and Figure 9 shown, in this embodiment, the first viewing angle electrode 14 and the second viewing angle electrode 16 are located on different layers and are spaced apart from each other by an insulating layer. A second signal electrode grid 17 is further provided on the side of the second substrate 12 facing the first liquid crystal layer 13. The second signal electrode grid 17, the second viewing angle electrode 16, the first signal electrode grid 15, and the first viewing angle electrode 14 are sequentially arranged in the direction facing the first liquid crystal layer 13 and are spaced apart from each other by an insulating layer. Of course, in other embodiments, the first viewing angle electrode 14 and the second viewing angle electrode 16 can also be located on the same layer, and the second viewing angle electrode 16 can also be electrically connected through the first signal electrode grid 15, but such a design will greatly increase the manufacturing process difficulty. The second signal electrode grid 17 is cross-connected with the second viewing angle electrode 16 in a diamond shape in the entire display area, and the second viewing angle electrode 16 and the second signal electrode grid 17 are electrically connected through punching, and the signals are the same.

[0056] The second signal electrode network 17 includes a second identification pattern electrode network 171, a second non-identification pattern electrode network 172, a second clock pattern electrode network 173, a second identification pattern signal line 174, and a second clock pattern signal line 175. The second identification pattern electrode network 171 corresponds to the identification pattern area 110, the second non-identification pattern electrode network 172 corresponds to the non-identification pattern area 120, and the second clock pattern electrode network 173 corresponds to the clock pattern area 130.

[0057] The second identification pattern electrode strip 161 is electrically connected to the second identification pattern electrode network 171 through a contact hole. One end of the second identification pattern signal line 174 is electrically connected to the second identification pattern electrode network 171, and the other end of the second identification pattern signal line 174 extends to the edge of the second substrate 12, so as to apply an electrical signal to the second identification pattern electrode strip 161 through the second identification pattern signal line 174. The second clock control electrode strip 163 is electrically connected to the second clock pattern electrode network 173. One end of the second clock pattern signal line 175 is electrically connected to the second clock pattern electrode network 173, and the other end of the second clock pattern signal line 175 extends to the edge of the second substrate 12, so as to apply an electrical signal to the second clock control electrode strip 163 through the second clock pattern signal line 175.

[0058] As Figure 8 and Figure 9 shown, the second clock pattern electrode networks 173 in adjacent stroke areas are insulated from each other, and a second clock pattern signal line 175 is correspondingly provided in each stroke area. Figure 8 Only the second clock pattern signal lines 175 corresponding to some stroke areas are shown in Figure 9 , and specifically, reference can be made to Figure 9 . Each digit "8" is composed of 7 mutually independent stroke areas. Therefore, each digit "8" corresponds to 7 second clock pattern signal lines 175, so that an electrical signal can be applied to each stroke area separately. Since the colon is displayed and extinguished simultaneously and can be regarded as one stroke area, only 1 second clock pattern signal line 175 needs to be provided. Therefore, a total of 58 second clock pattern signal lines 175 are required in the clock pattern area 130 to apply electrical signals.

[0059] In this embodiment, the second non-identification pattern electrode 162 is insulated from the second non-identification pattern electrode network 172, and an electrical signal can be directly applied to the second non-identification pattern electrode 162 from the edge of the second substrate 12. The non-identification pattern area 120 also corresponds to the second non-identification pattern electrode network 172, which can increase the display uniformity. Of course, in other embodiments, the second non-identification pattern electrode 162 can also be electrically connected to the second non-identification pattern electrode network 172 through a contact hole, so as to apply an electrical signal to the second non-identification pattern electrode 162 through the second non-identification pattern electrode network 172.

[0060] From Figure 4 and Figure 7 it can be seen that there are also two non - identification pattern areas 120 in the middle area of each digit "8". Since the adjacent two stroke areas are independent and spaced apart, the non - identification pattern area 120 in the middle area of each digit "8" can be connected to the non - identification pattern area 120 in the outer area of each digit "8" from the gap between the adjacent two stroke areas. That is, the first non - identification pattern electrode 142 in the middle area of each digit "8" can be connected to the first non - identification pattern electrode 142 in the outer area of each digit "8" from the gap between the adjacent two stroke areas. Similarly, the second non - identification pattern electrode 162 is the same. Of course, signal lines can also be set for the first non - identification pattern electrode network 152 in the middle area of each digit "8" in the first signal electrode network 15. The first non - identification pattern electrode 142 in the middle area of each digit "8" is electrically connected to the first non - identification pattern electrode network 152, and an electric signal is applied to the first non - identification pattern electrode 142 in the middle area of each digit "8" through the signal line; signal lines are set for the second non - identification pattern electrode network 172 in the middle area of each digit "8" in the second signal electrode network 17. The second non - identification pattern electrode 162 in the middle area of each digit "8" is electrically connected to the second non - identification pattern electrode network 172, and an electric signal is applied to the second non - identification pattern electrode 162 in the middle area of each digit "8" through the signal line.

[0061] In this embodiment, the grid lines in the first signal electrode network 15 and the second signal electrode network 17 overlap in the projection on the second substrate 12, 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 can also be staggered from each other, and this is not limited thereto.

[0062] Furthermore, an insulating layer is also provided on the side of the second substrate 12 facing the first liquid crystal layer 13, and the insulating layer covers the first viewing angle electrode 14, thereby preventing the problem of short - circuit between the first viewing angle electrode 14 and the common viewing angle electrode 111.

[0063] In this embodiment, the first liquid crystal layer 13 preferably uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. The phase delay of the first liquid crystal layer 13 is preferably 800 nm, and the optional range is 500 nm < phase delay < 1000 nm. As Figure 2 shown, in the initial state, the positive liquid crystal molecules in the first liquid crystal layer 13 are aligned parallel to the first substrate 11 and the second substrate 12. The alignment directions of the positive liquid crystal molecules on the side close to the first substrate 11 and the side close to the second substrate 12 are parallel or anti - parallel, so that the dimming box 10 presents a wide - viewing - angle display in the initial state, as Figure 11As shown. Optionally, the alignment direction of the first liquid crystal layer 13 forms an angle of 5°-10°, preferably 7°, with the length direction of the electrode strips in the first viewing angle electrode 14 and the second viewing angle electrode 16, so that when the identification pattern is displayed, the clock is displayed, and the specular reflection occurs, the positive liquid crystal molecules in the first liquid crystal layer 13 can be deflected horizontally more quickly. Of course, the positive liquid crystal molecules in the first liquid crystal layer 13 can also have a pretilt angle of 3°-7° initially, so that when the viewing angle is narrow, the positive liquid crystal molecules in the first liquid crystal layer 13 can be deflected vertically more quickly.

[0064] In this embodiment, as Figure 1 shown, the identification pattern area 110 is located at the center of the display panel, the clock pattern area 130 is located at the lower right corner of the display panel, and the other areas of the display panel except the identification pattern area 110 and the clock pattern area 130 are non-identification pattern areas 120. Of course, the positions of the identification pattern area 110 and the clock pattern area 130 can also be set according to the positions where the LOGO pattern needs to be displayed and the position where the clock pattern is displayed.

[0065] In this embodiment, the display cell 20 is preferably a liquid crystal cell. Of course, in other embodiments, the display cell 20 can also be a self-luminous display (such as an OLED display, a Micro LED display), but the dimming cell 10 needs to be disposed above the display cell 20.

[0066] The display cell 20 includes a color filter substrate 21, an array substrate 22 disposed opposite to the color filter substrate 21, and a second liquid crystal layer 23 disposed between the color filter substrate 21 and the array substrate 22. The second liquid crystal layer 23 preferably uses positive liquid crystal molecules, that is, liquid crystal molecules with positive dielectric anisotropy. In the initial state, the positive liquid crystal molecules in the second liquid crystal layer 23 are aligned parallel to the color filter substrate 21 and the array substrate 22, and the alignment directions of the positive liquid crystal molecules on the side close to the color filter substrate 21 and the side close to the array substrate 22 are parallel or antiparallel. Of course, in other embodiments, the second liquid crystal layer 23 can also use negative liquid crystal molecules, and the negative liquid crystal molecules in the second liquid crystal layer 23 can be aligned perpendicular to the color filter substrate 21 and the array substrate 22, that is, an alignment method similar to the VA display mode.

[0067] The color filter substrate 21 is provided with a color resist layer 212 arranged in an array and a black matrix 211 that separates the color resist layer 212. The color resist layer 212 includes color resist materials of red (R), green (G), and blue (B), and forms sub-pixels of red (R), green (G), and blue (B) correspondingly.

[0068] On one side facing the second liquid crystal layer 23, the array substrate 22 is formed with a plurality of pixel units defined by mutual insulation and intersection of a plurality of scan lines (not shown in the figure) and a plurality of data lines (not shown in the figure). Each pixel unit is provided with a pixel electrode 222 and a thin film transistor (not shown in the figure). The pixel electrode 222 is electrically connected to the data line adjacent to the thin film transistor through the thin film transistor. Among them, the thin film transistor includes a gate, an active layer, a drain, and a source. The gate and the scan line are on the same layer and electrically connected. The gate and the active layer are separated by an insulating layer. The source is electrically connected to the data line, and the drain is electrically connected to the pixel electrode 222 through a contact hole.

[0069] As Figure 2 shown, in this embodiment, a common electrode 221 is further provided on one side of the array substrate 22 facing the second liquid crystal layer 23. The common electrode 221 and the pixel electrode 222 are on different layers and are insulated from each other by an insulating layer. The common electrode 221 can be located above or below the pixel electrode 222 ( Figure 2 as shown in the figure, the common electrode 221 is located below the pixel electrode 222). Preferably, the common electrode 221 is a planar electrode provided as a whole surface, and the pixel electrode 222 is a block electrode provided as a whole in each pixel unit or a slit electrode having a plurality of electrode strips to form a Fringe Field Switching (FFS) mode. Of course, in other embodiments, the pixel electrode 222 and the common electrode 221 can be on the same layer, but they are insulated from each other. The pixel electrode 222 and the common electrode 221 can each include a plurality of electrode strips, and the electrode strips of the pixel electrode 222 and the electrode strips of the common electrode 221 are alternately arranged to form an In-Plane Switching (IPS) mode; or, in other embodiments, the array substrate 22 is provided with a pixel electrode 222 on one side facing the second liquid crystal layer 23, and the color filter substrate 21 is provided with a common electrode 221 on one side facing the second liquid crystal layer 23 to form a TN mode or a VA mode.

[0070] Among them, the first substrate 11, the second substrate 12, the color filter substrate 21, and the array substrate 22 can be made of materials such as glass, acrylic, and polycarbonate. 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 can be indium tin oxide (ITO) or indium zinc oxide (IZO), etc. The first signal electrode network 15 and the second signal electrode network 17 can be made of copper (Cu), silver (Ag), chromium (Cr), molybdenum (Mo), aluminum (Al), titanium (Ti), manganese (Mn), nickel (Ni), etc., or a combination of the above metals such as Al / Mo, Cu / Mo, etc. with relatively low resistance.

[0071] The present invention further provides a display device, which includes the display panel with switchable wide and narrow viewing angles as described above and a backlight module 40. The backlight module 40 is located below the display panel and is used to provide a backlight source for the display panel. Of course, if the display box 20 uses a self-luminous display, there is no need to additionally set a backlight source.

[0072] The backlight module 40 includes a backlight source 41 and a privacy layer 43. The privacy layer 43 is used to narrow the range of the light emission angle. A brightness enhancement film 42 is further provided between the backlight source 41 and the privacy layer 43, and the brightness enhancement film 42 increases the brightness of the backlight module 40. Among them, the privacy layer 43 is equivalent to a miniature louver structure, which can block the light with a larger incident angle and allow the light with a smaller incident angle to pass through, so that the angle range of the light passing through the privacy layer 43 becomes smaller. The privacy layer 43 includes a plurality of light blocking walls arranged in parallel and light transmission holes located between adjacent two light blocking walls. Absorbing materials are provided on both sides of the light blocking walls. Of course, the backlight source 41 can also be a light collecting type backlight source, so that there is no need to set the privacy layer 43. However, the light collecting type backlight source is more expensive than the conventional backlight source. The backlight module 40 can be a side-entry type backlight module or a direct-lit type backlight module. Preferably, the backlight module 40 adopts a collimated backlight (CBL) mode, which can collect the light and ensure the display effect.

[0073] Figure 10 It is one of the signal waveform diagrams of the display device in the wide viewing angle in the first embodiment of the present invention. Figure 11 It is one of the structural schematic diagrams of the display device in the wide viewing angle in the first embodiment of the present invention. Figure 12 It is the second signal waveform diagram of the display device in the wide viewing angle in the first embodiment of the present invention. Figure 13 It is the second structural schematic diagram of the display device in the wide viewing angle in the first embodiment of the present invention. Figure 14 It is the simulation diagram of the viewing angle and light transmittance of the display device in the wide viewing angle in the first embodiment of the present invention and the prior art. Figure 15 It is the signal waveform diagram of the display device in the narrow viewing angle in the first embodiment of the present invention. Figure 16 It is the structural schematic diagram of the display device in the narrow viewing angle in the first embodiment of the present invention. Figure 17 It is the simulation diagram of the viewing angle and light transmittance of the display device in the narrow viewing angle in the first embodiment of the present invention and the prior art. Figure 18 It is the signal waveform diagram of the display device in the sleep mode in the first embodiment of the present invention. Figure 19 It is the structural schematic diagram of the display device in the identification pattern display / clock display in the first embodiment of the present invention. Figure 20 It is the structural schematic diagram of the display device in the specular reflection in the first embodiment of the present invention. Figure 21 It is the principle schematic diagram of the display device in the identification pattern display / clock display / specular reflection in the first embodiment of the present invention.

[0074] As Figures 10 to 21 shown, the present application also provides a driving method for switchable wide and narrow viewing angles, which is used to drive the display panel with switchable wide and narrow viewing angles as described above. The driving method includes: in the wide viewing angle mode, a common electrical signal Vcom is applied to the common viewing angle electrode 111, where the common electrical signal Vcom is a DC common voltage signal. A first electrical signal V1 is applied to the entire first viewing angle electrode 14 (i.e., the first identification pattern electrode strip 141, the first non-identification pattern electrode 142, and the first clock control electrode strip 143) and the entire second viewing angle electrode 16 (i.e., the second identification pattern electrode strip 161, the second non-identification pattern electrode 162, and the second clock control electrode strip 163). The voltage difference between the first electrical signal V1 and the common electrical signal Vcom is less than a first preset value (e.g., less than 0.8V). Preferably, as Figure 10 shown, an AC voltage of 0.8V is applied to the common viewing angle electrode 111, the entire first viewing angle electrode 14, and the entire second viewing angle electrode 16. Basically, no vertical electric field is formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14, and between the common viewing angle electrode 111 and the entire second viewing angle electrode 16. The positive liquid crystal molecules in the first liquid crystal layer 13 basically do not deflect and remain in the initial lying state( Figure 2 、 Figure 11 ), and at this time, the light modulation box 10 presents a wide viewing angle display.

[0075] Of course, the voltage difference between the first electrical signal V1 and the common electrical signal Vcom can also be greater than a second preset value (e.g., greater than 5.0V). For example, a DC voltage of 0V is applied to the common viewing angle electrode 111( Figure 12 ), and an AC voltage of 5.0V is applied to the entire first viewing angle electrode 14 and the entire second viewing angle electrode 16. The second preset value is much greater than the first preset value. A relatively strong vertical electric field is formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14, and between the common viewing angle electrode 111 and the entire second viewing angle electrode 16( Figure 13 E2 in Figure 13 ), and the positive liquid crystal molecules in the first liquid crystal layer 13 deflect greatly and are perpendicular to the first substrate 11 and the second substrate 12. As Figure 13 shown, at this time, the light modulation box 10 also presents a wide viewing angle display.

[0076] As Figure 15 and Figure 16As shown, in the narrow viewing angle mode, a common electrical signal Vcom is applied to the common viewing angle electrode 111, and a second electrical signal V2 is applied to the entire first viewing angle electrode 14 and the entire second viewing angle electrode 16. The pressure difference between the second electrical signal V2 and the common electrical signal Vcom is greater than a third preset value (e.g., greater than 1.5V) and less than a fourth preset value (e.g., less than 4.0V), where the first preset value < the third preset value < the fourth preset value < the second preset value. At this time, a strong vertical electric field ( Figure 16 the E3 in

[0077] ) will be formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14 and between the common viewing angle electrode 111 and the entire second viewing angle electrode 16. The positive liquid crystal molecules in the first liquid crystal layer 13 are greatly deflected and in an inclined state, and the brightness becomes darker at a large viewing angle. At this time, the light modulation box 10 presents a narrow viewing angle display.

[0078] Specifically, the second electrical signal V2 includes a first voltage V21 and a second voltage V22. The first voltage V21 is applied to the entire first viewing angle electrode 14, and the second voltage V22 is applied to the entire second viewing angle electrode 16. Since the first viewing angle electrode 14 and the second viewing angle electrode 16 are located in different layers, in order to avoid the influence of the distance difference from the common viewing angle electrode 111, the first voltage V21 is less than the second voltage V22 and the pressure difference is 0.1 - 0.5V, e.g., 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 intensities of the vertical electric fields formed between the common viewing angle electrode 111 and the entire first viewing angle electrode 14 and between the common viewing angle electrode 111 and the entire second viewing angle electrode 16 are the same, and to ensure the narrow viewing angle effect.

[0079] Figure 14 It is a simulation diagram of the viewing angle and light transmittance of the display device in the first embodiment of the present invention and the prior art at a wide viewing angle. Figure 17This is a simulation diagram of the viewing angle and light transmittance of the display device in Example 1 of the present invention and in the prior art at a narrow viewing angle. Figure 14 In the figure, curve W1 is the simulation curve of the viewing angle and light transmittance of the display device in Example 1 of the present invention at a wide viewing angle. Figure 14 In the figure, curve W2 is the simulation curve of the viewing angle and light transmittance of the display device in the prior art at a wide viewing angle. It can be seen from Figure 14 that there is almost no difference between the wide viewing angle effect in Example 1 of the present invention and the wide viewing angle effect in the prior art. Figure 17 In the figure, curve N1 is the simulation curve of the viewing angle and light transmittance of the display device in Example 1 of the present invention at a narrow viewing angle. Figure 17 In the figure, curve N2 is the simulation curve of the viewing angle and light transmittance of the display device in the prior art at a narrow viewing angle. It can be seen from Figure 17 that there is also almost no difference between the narrow viewing angle effect in Example 1 of the present invention and the narrow viewing angle effect in the prior art. That is, the present invention can realize the display of the identification pattern, the display of the clock, and the specular reflection on the premise of ensuring good wide viewing angle and narrow viewing angle effects.

[0080] In the wide viewing angle mode and the narrow viewing angle mode, the display box 20 and the backlight module 40 are turned on, and the corresponding gray scale voltage is applied to the pixel electrode 222. A voltage difference is formed between the pixel electrode 222 and the common electrode 221 to generate a horizontal electric field ( Figure 11 、 Figure 13 、 Figure 16 E1 in the figure), so that the positive liquid crystal molecules deflect in the horizontal direction along the direction parallel to the horizontal electric field. The gray scale voltage includes 0-255 levels of gray scale voltage. When different gray scale voltages are applied to the pixel electrode 222, the pixel unit presents different brightnesses, thereby displaying different pictures to realize the normal display of the display device at wide and narrow viewing angles.

[0081] For example, Figure 18 and Figure 19 as shown, in the identification pattern display mode, a common electric signal Vcom is applied to the common viewing angle electrode 111, a third electric signal V3 is applied to the first identification pattern electrode bar 141, and a fourth electric signal V4 is applied to the second identification 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 (for example, greater than 1.5V) and less than a sixth preset value (for example, less than 10V). In this embodiment, the first preset value < the fifth preset value < the sixth preset value. Both the common electric signal Vcom and the fourth electric signal V4 are 0V DC voltages. The third electric signal V3 is, for example, an AC voltage of 4.0V. At this time, a relatively large horizontal electric field will be formed between the first identification pattern electrode bar 141 and the second identification pattern electrode bar 161 ( Figure 19In E4), the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected greatly in the horizontal direction, so that the reflected light of the transflective film 32 passes through the identification pattern area 110 to realize the display of the identification pattern. Of course, a small vertical electric field will also be formed between the first identification pattern electrode strip 141 and the common viewing angle electrode 111, and the positive liquid crystal molecules in the first liquid crystal layer 13 will also be deflected in the vertical direction. The vertical electric field is so small that it can be ignored. In other embodiments, the fourth electrical signal V4 can also be an alternating voltage with a polarity opposite to that of the third electrical signal V3, such as an alternating voltage of -4.0V.

[0082] In the clock display mode, its principle is similar to that of the identification pattern display mode. Specifically, a common electrical signal Vcom is applied to the common viewing angle electrode 111, a third electrical signal V3 is applied to the first clock control electrode strip 143 in the corresponding stroke area, and a fourth electrical signal V4 is applied to the second clock control electrode strip 163. The pressure difference between the third electrical signal V3 and the fourth electrical 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, both the common electrical signal Vcom and the fourth electrical signal V4 are 0V DC voltages, and the third electrical signal V3 is, for example, an alternating voltage of 4.0V. A large horizontal electric field will be formed between the first clock control electrode strip 143 and the second clock control electrode strip 163 in the corresponding stroke area. The positive liquid crystal molecules in the corresponding stroke area of the first liquid crystal layer 13 are deflected greatly in the horizontal direction, so that the reflected light of the transflective film 32 passes through the corresponding stroke area. The dark state and the bright state in each stroke area can be controlled separately, so that the number "8" can present any number from 0 to 9 to realize the display of the digital clock. Of course, in other embodiments, the fourth electrical signal V4 can also be an alternating voltage with a polarity opposite to that of the third electrical signal V3, such as an alternating voltage of -4.0V.

[0083] As Figure 18 and Figure 20 shown, in the specular reflection mode, its principle is similar to that of the identification pattern display mode. Specifically, a common electrical signal Vcom is applied to the common viewing angle electrode 111, a third electrical signal V3 is applied to the entire first viewing angle electrode 14, and a fourth electrical signal V4 is applied to the entire second viewing angle electrode 16. The pressure difference between the third electrical signal V3 and the fourth electrical 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, both the common electrical signal Vcom and the fourth electrical signal V4 are 0V DC voltages, and the third electrical signal V3 is, for example, an alternating voltage of 4.0V. A large horizontal electric field will be formed between the entire first viewing angle electrode 14 and the entire second viewing angle electrode 16 ( Figure 20In E5), all the positive liquid crystal molecules in the first liquid crystal layer 13 are deflected greatly in the horizontal direction, so that the reflected light of the transflective film 32 passes through the identification pattern area 110, the non-identification pattern area 120, and the clock pattern area 130, realizing specular reflection. Of course, in other embodiments, the fourth electric signal V4 can also be an alternating voltage with a polarity opposite to that of the third electric signal V3, for example, an alternating voltage of -4.0V.

[0084] As Figure 21 shown, in the identification pattern display mode, the first liquid crystal layer 13 in the identification pattern area 110 has an effective phase delay. The ambient light forms linearly polarized light parallel to the transmission axis of the first polarizer 31 after passing through the first polarizer 31, and forms circularly polarized light or elliptically polarized light after passing through the first liquid crystal layer 13. Part of the light is reflected back by the transflective film 32, and forms circularly polarized light or elliptically polarized light after passing through the first liquid crystal layer 13. Part of the light passes through the first polarizer 31, making the identification pattern area 110 present a bright state. Since no edge electric field is formed in the non-identification pattern area 120, the positive liquid crystal molecules in the first liquid crystal layer 13 remain in the initial state. The ambient light forms linearly polarized light parallel to the transmission axis of the first polarizer 31 after passing through the first polarizer 31, and is still linearly polarized light parallel to the transmission axis of the first polarizer 31 after passing through the first liquid crystal layer 13. Finally, all of it passes through the transflective film 32, and no light is reflected back by the transflective film 32. Therefore, the non-identification pattern area 120 presents a dark state. Similarly, the principles of the clock display mode and the specular reflection mode are the same as those of the identification pattern display mode, and will not be elaborated here.

[0085] Among them, in the identification pattern display mode, the clock display mode, and the specular reflection mode, 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 film 32. Moreover, the identification pattern display mode and the clock display mode can be displayed simultaneously. In the identification pattern display mode, the clock display mode, and the specular reflection mode, since the pictures are basically the same, the frequency of the third electric signal V3 can be relatively low, for example, 1Hz. And the pictures of each frame in the wide viewing angle and the narrow viewing angle are different, and the driving frequencies of the first electric signal V1 and the second electric signal V2 are 60Hz to 150Hz.

[0086] [Embodiment 2]

[0087] Figure 22 is a schematic structural diagram of the second substrate in the second embodiment of the present invention. As Figure 22 shown, the wide and narrow viewing angle switchable display panel and driving method provided in the second embodiment of the present invention are the same as those in the first embodiment ( Figures 1 to 21) The wide and narrow viewing angle switchable display panel and driving method in it are basically the same. The difference is that in this embodiment, the first non-identifying pattern electrode 142 is a block electrode corresponding to the non-identifying pattern area 120, and the second viewing angle electrode 16 does not need to be provided with a second non-identifying pattern electrode 162 in the area corresponding to the non-identifying pattern area 120. Of course, the second viewing angle electrode 16 can also be provided with a second non-identifying pattern electrode 162 in the area corresponding to the non-identifying pattern area 120, but the second non-identifying pattern electrode 162 has almost no effect. Of course, the second non-identifying pattern electrode network 172 in the non-identifying pattern area 120 can also be omitted, but setting the second non-identifying pattern electrode network 172 can make the screen display more uniform.

[0088] Since the first non-identifying pattern electrode 142 is a block electrode corresponding to the non-identifying pattern area 120, an edge electric field cannot be formed in the non-identifying pattern area 120. Therefore, the specular reflection mode cannot be realized in this embodiment. However, the wide viewing angle mode, narrow viewing angle mode, identifying pattern display mode, and clock display mode can still be realized.

[0089] Those skilled in the art should understand that the rest of the structure and working principle of this embodiment are the same as those of the first embodiment and will not be elaborated here.

[0090] This application also provides a display device, including the wide and narrow viewing angle switchable display panel described above.

[0091] Figure 23 It is a schematic plan view of the display device in the present invention. Please refer to Figure 23 , the display device is provided with a display mode switching button 50 for the user to send a display mode switching request to the display device. In this embodiment, the display mode switching button 50 can be a physical button (such as Figure 23As shown. Of course, in other embodiments, the display mode switching button 50 can also be implemented by software control or an application (APP) to achieve the switching function (for example, setting the display mode through a slider). When the user needs to switch between the wide viewing angle, narrow viewing angle, and sleep mode, the viewing angle switching button 50 can be operated to send a viewing angle switching request to the display device. Finally, the driving chip 60 controls different electrical signals to be applied to the common viewing angle electrode 111, the first viewing angle electrode 14, and the second viewing angle electrode 16. The display device can then achieve the switching between the wide viewing angle and the narrow viewing angle. When switching to the wide viewing angle, the driving method corresponding to the wide-angle mode is adopted. When switching to the narrow viewing angle, the driving method corresponding to the narrow viewing angle mode is adopted. When switching to the sleep mode, the driving method corresponding to the sleep mode is adopted. Among them, the sleep mode includes the identification pattern display mode, the clock display mode, and the mirror reflection mode. Therefore, the display device of the embodiment of the present invention has strong operation flexibility and convenience, and achieves a multi-functional display device that combines entertainment video and privacy protection.

[0092] In this article, the orientation words such as up, down, left, right, front, and back are defined based on the positions of the structures in the drawings and the positions of the structures relative to each other, only for the clarity and convenience of expressing the technical solution. It should be understood that the use of the orientation words should not limit the scope of protection requested by this application. It should also be understood that the terms "first" and "second" used in this article are only for name distinction and do not limit the quantity and order.

[0093] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications using the above-disclosed technical content within the scope of the technical solution of the present invention, which are equivalent embodiments of equivalent changes. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change, and modification made to the above embodiment based on the technical essence of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A display panel with switchable wide and narrow viewing angles, characterized in that, The display panel includes a display cell (20) and a dimming cell (10) laminated on the light-emitting side of the display cell (20). A first polarizer (31) is provided on a side of the dimming cell (10) away from the display cell (20). A transflective film (32) is provided between the dimming cell (10) and the display cell (20). A second polarizer (33) is provided on a side of the display cell (20) away from the dimming cell (10). A transmission axis of the first polarizer (31) is parallel to a transmission axis of the transflective film (32). A transmission axis of the second polarizer (33) is perpendicular to the transmission axis of the transflective film (32). A reflection axis of the transflective film (32) is perpendicular to the transmission axis of the transflective film (32). The display panel has a patterned identification pattern area (110) and a non-identification pattern area (120). The dimming cell (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). A common viewing angle electrode (111) is provided on a side of the first substrate (11) facing the first liquid crystal layer (13). A first viewing angle electrode (14) and a second viewing angle electrode (16) that cooperate with the common viewing angle electrode (111) are provided on a side of the second substrate (12) facing the first liquid crystal layer (13). The first viewing angle electrode (14) and the second viewing angle electrode (16) are insulated from each other and spaced apart. The first viewing angle electrode (14) includes a first identification pattern electrode strip (141) and a first non-identification pattern electrode (142). The second viewing angle electrode (16) includes a second identification pattern electrode strip (161). The first identification pattern electrode strip (141) and the second identification pattern electrode strip (161) both correspond to the identification pattern area (110). The first non-identification pattern electrode (142) corresponds to the non-identification pattern area (120). Projections of the first identification pattern electrode strip (141) and the second identification pattern electrode strip (161) on the second substrate (12) are parallel to each other and alternately distributed.

2. The switchable display panel with wide and narrow viewing angles according to claim 1, wherein The first non-identification pattern electrode (142) is a block electrode corresponding to the non-identification pattern area (120); or, the first non-identification pattern electrode (142) includes a plurality of first electrode strips, the second viewing angle electrode (16) further includes a second non-identification pattern electrode (162) corresponding to the non-identification pattern area (120), the second non-identification pattern electrode (162) includes a plurality of second electrode strips, and projections of the first electrode strips and the second electrode strips on the second substrate (12) are parallel to each other and alternately distributed.

3. The switchable display panel with wide and narrow viewing angles according to claim 1, wherein The display panel further has a patterned clock pattern area (130), the clock pattern area (130) includes a plurality of independent stroke areas, the first viewing angle electrode (14) further includes a first clock control electrode strip (143), the second viewing angle electrode (16) further includes a second clock control electrode strip (163), the first clock control electrode strip (143) and the second clock control electrode strip (163) both correspond to the clock pattern area (130), and their projections on the second substrate (12) are parallel and alternately distributed, and the first clock control electrode strips (143) in adjacent stroke areas are insulated from each other, and the second clock control electrode strips (163) in adjacent stroke areas are insulated from each other.

4. The display panel with switchable narrow and wide viewing angles according to claim 3, wherein On one side of the second substrate (12) facing the first liquid crystal layer (13), there is also provided a first signal electrode network (15), and the first signal electrode network (15) and the first viewing angle electrode (14) are located in different layers; The first signal electrode network (15) includes a first identification pattern electrode network (151), a first non-identification pattern electrode network (152), a first clock pattern electrode network (153), a first identification pattern signal line (154), and a first clock pattern signal line (155), the first identification pattern electrode network (151) corresponds to the identification pattern area (110), the first non-identification pattern electrode network (152) corresponds to the non-identification pattern area (120), and the first clock pattern electrode network (153) corresponds to the clock pattern area (130); The first identification pattern electrode strip (141) is electrically connected to the first identification pattern electrode network (151), the first clock control electrode strip (143) is electrically connected to the first clock pattern electrode network (153), one end of the first identification pattern signal line (154) is electrically connected to the first identification pattern electrode network (151), the other end of the first identification pattern signal line (154) extends to the edge of the second substrate (12), one end of the first clock pattern signal line (155) is electrically connected to the first clock pattern electrode network (153), and the other end of the first clock pattern signal line (155) extends to the edge of the second substrate (12); The first clock pattern electrode networks (153) in adjacent stroke areas are insulated from each other, and one first clock pattern signal line (155) is correspondingly provided in each stroke area.

5. The switchable display panel with wide and narrow viewing angles according to claim 4, characterized in that The first viewing angle electrode (14) and the second viewing angle electrode (16) are located in different layers. On one side of the second substrate (12) facing the first liquid crystal layer (13), there is also provided a second signal electrode network (17), 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 the direction facing the first liquid crystal layer (13); The second signal electrode network (17) includes a second identification pattern electrode network (171), a second non-identification pattern electrode network (172), a second clock pattern electrode network (173), a second identification pattern signal line (174), and a second clock pattern signal line (175). The second identification pattern electrode network (171) corresponds to the identification pattern area (110), the second non-identification pattern electrode network (172) corresponds to the non-identification pattern area (120), and the second clock pattern electrode network (173) corresponds to the clock pattern area (130). The second identification pattern electrode strip (161) is electrically connected to the second identification pattern electrode network (171), the second clock control electrode strip (163) is electrically connected to the second clock pattern electrode network (173), one end of the second identification pattern signal line (174) is electrically connected to the second identification pattern electrode network (171), the other end of the second identification pattern signal line (174) extends to the edge of the second substrate (12), one end of the second clock pattern signal line (175) is electrically connected to the second clock pattern electrode network (173), and the other end of the second clock pattern signal line (175) extends to the edge of the second substrate (12). The second clock pattern electrode networks (173) in adjacent stroke areas are insulated from each other, and one second clock pattern signal line (175) is provided corresponding to each stroke area.

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

7. A driving method for a display panel, characterized in that, The driving method is used to drive the wide and narrow viewing angle switchable display panel as described in any one of claims 1-6. The driving method includes: In the wide viewing angle mode, a common electrical signal (Vcom) is applied to the common viewing angle electrode (111), a first electrical signal (V1) is applied to the entire first viewing angle electrode (14) and the entire second viewing angle electrode (16). The pressure difference between the first electrical signal (V1) and the common electrical signal (Vcom) is less than a first preset value or greater than a second preset value. In the narrow viewing angle mode, a common electrical signal (Vcom) is applied to the common viewing angle electrode (111), a second electrical signal (V2) is applied to the entire first viewing angle electrode (14) and the entire second viewing angle electrode (16). The pressure difference between the second electrical signal (V2) and the common electrical signal (Vcom) is greater than a third preset value and less than a fourth preset value. In the identification pattern display mode, a common electrical signal (Vcom) is applied to the common viewing angle electrode (111), a third electrical signal (V3) is applied to the first identification pattern electrode strip (141), and a fourth electrical signal (V4) is applied to the second identification pattern electrode strip (161). The pressure difference between the third electrical signal (V3) and the fourth electrical signal (V4) is greater than a fifth preset value and less than a sixth preset value. Among them, in the wide viewing angle mode and the narrow viewing angle mode, the display box (20) is in an open state, and in the identification pattern display mode, the display box (20) is in a closed state; the first preset value < the third preset value < the fourth preset value < the second preset value, and the first preset value < the fifth preset value < the sixth preset value.

8. The driving method of the display panel according to claim 7, characterized in that, The display panel further has a graphical clock pattern area (130), the clock pattern area (130) includes a plurality of independent stroke areas, the first viewing angle electrode (14) further includes a first clock control electrode strip (143), the second viewing angle electrode (16) further includes a second clock control electrode strip (163), the first clock control electrode strip (143) and the second clock control electrode strip (163) both correspond to the clock pattern area (130), and their projections on the second substrate (12) are parallel and alternately distributed. The first clock control electrode strips (143) in adjacent stroke areas are insulated from each other, and the second clock control electrode strips (163) in adjacent stroke areas are insulated from each other. The driving method further includes: In the clock display mode, a common electrical signal (Vcom) is applied to the common viewing angle electrode (111), a third electrical signal (V3) is applied to the first clock control electrode strip (143) corresponding to the stroke area, and a fourth electrical signal (V4) is applied to the second clock control electrode strip (163) corresponding to the stroke area. The pressure difference between the third electrical signal (V3) and the fourth electrical signal (V4) is greater than the fifth preset value and less than the sixth preset value; Among them, in the clock display mode, the display box (20) is in a closed state, and the identification pattern display mode and the clock display mode can be displayed simultaneously.

9. The driving method of the display panel according to claim 7, wherein, The first non-identification pattern electrode (142) includes a plurality of first electrode strips, the second viewing angle electrode (16) further includes a second non-identification pattern electrode (162) corresponding to the non-identification pattern area (120), the second non-identification pattern electrode (162) includes a plurality of second electrode strips, and the projections of the first electrode strips and the second electrode strips on the second substrate (12) are parallel and alternately distributed. The driving method further includes: In the specular reflection mode, a common electrical signal (Vcom) is applied to the common viewing angle electrode (111), a third electrical signal (V3) is applied to the entire first viewing angle electrode (14), and a fourth electrical signal (V4) is applied to the entire second viewing angle electrode (16). The pressure difference between the third electrical signal (V3) and the fourth electrical signal (V4) is greater than the fifth preset value and less than the sixth preset value; Among them, in the specular reflection mode, the display box (20) is in a closed state.

10. A display device, characterized in that, Comprising the wide and narrow viewing angle switchable display panel according to any one of claims 1-6.

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