Display device

Abstract

The invention provides a display device, relates to the technical field of display, and is used for optimizing multi-view display. The display device comprises a backlight module; the first liquid crystal box is located on one side of the backlight module and comprises a first common electrode, a first liquid crystal layer and a first pixel electrode; the second liquid crystal box and the first liquid crystal box are located on the same side of the backlight module, and the second liquid crystal box comprises a first electrode, a second liquid crystal layer and a second electrode; wherein the widths of at least two second electrodes in the first direction are different, and / or the distances between at least part of adjacent second electrodes are different in the first direction.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display device. Background Art

[0002] Currently, display devices primarily rely on in-box design adjustments and polarizer compensation optimization to control viewing angles, but this control model has significant limitations. This is particularly true in the automotive sector, where displays located in different locations within the vehicle need to meet varying viewing angle requirements. This control model not only struggles to accommodate diverse automotive applications and customer needs, but also faces challenges with numerous customization requirements and high costs. Furthermore, it struggles to meet increasingly complex and refined demands, significantly limiting the development of multi-viewing angle displays. Summary of the Invention

[0003] An embodiment of the present invention provides a display device for optimizing multi-viewing angle display.

[0004] An embodiment of the present invention provides a display device, including: Backlight module; A first liquid crystal cell, located on one side of the backlight module, comprising a first common electrode, a first liquid crystal layer and a first pixel electrode; The second liquid crystal box is located on the same side of the backlight module as the first liquid crystal box, and includes a first electrode, a second liquid crystal layer and a second electrode; wherein, at least two of the second electrodes have different widths in the first direction, and / or, along the first direction, the distances between at least some adjacent second electrodes are different.

[0005] In an embodiment of the present invention, a separate second liquid crystal cell is used to adjust the viewing angle. By varying the scattering rate of the cholesteric liquid crystal in the second liquid crystal cell, switching between multiple viewing angles can be achieved. This can then match the different viewing angle specifications of the vehicle, meeting the viewing angle requirements of the vehicle display in different application scenarios, and overcoming the problems of multiple customization requirements and high costs in related technologies.

[0006] Furthermore, embodiments of the present invention feature differentiated designs for the second electrode structures at different locations within the second liquid crystal cell. This differentiated design of the second electrode allows for different electric field intensities at different locations within the second liquid crystal cell, resulting in different deflection angles of the cholesteric liquid crystal at these locations. This controls the bright / dark states at different viewing angles and achieves varying contrast at different viewing angles. This structure of the second liquid crystal cell allows for more refined adjustment of the light emission angle and intensity at different locations, thereby improving visual color skew and enabling differentiated viewing angle adjustment for each subarea, further optimizing the multi-viewing angle capabilities of the display device. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative labor.

[0008] Figure 1 A schematic structural diagram of a display device provided by an embodiment of the present invention; Figure 2 A schematic structural diagram of a second electrode in a display device provided by an embodiment of the present invention; Figure 3 Another structural schematic diagram of a display device provided by an embodiment of the present invention; Figure 4 Another structural schematic diagram of the second electrode in the display device provided by an embodiment of the present invention; Figure 5 A schematic diagram of a flipping of liquid crystal in a second liquid crystal cell provided by an embodiment of the present invention; Figure 6 A schematic diagram of another structure of a display device provided by an embodiment of the present invention; Figure 7 A schematic diagram of another structure of a display device provided by an embodiment of the present invention; Figure 8 A schematic diagram of another structure of a display device provided by an embodiment of the present invention; Figure 9 A schematic diagram of another structure of the second electrode in the display device provided by an embodiment of the present invention; Figure 10 A schematic diagram of another structure of a display device provided by an embodiment of the present invention; Figure 11 A schematic diagram of another structure of a display device provided by an embodiment of the present invention; Figure 12 A schematic diagram of another structure of a display device provided by an embodiment of the present invention; Figure 13 This is another structural schematic diagram of a display device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0009] In order to better understand the technical solution of the present invention, the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0010] It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work are within the scope of protection of the present invention.

[0011] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The singular forms "a", "an", "the" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0012] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0013] An embodiment of the present invention provides a display device, Figure 1 A schematic structural diagram of a display device provided by an embodiment of the present invention is shown in FIG. Figure 2 A schematic structural diagram of a second electrode in a display device provided by an embodiment of the present invention is shown. Figure 3 This is another structural diagram of a display device provided by an embodiment of the present invention. Figure 4 Another structural diagram of the second electrode in the display device provided by the embodiment of the present invention is shown in FIG. Figures 1-4 As shown, the display device includes a backlight module 1 , a first liquid crystal cell 2 located on one side of the backlight module 1 , and a second liquid crystal cell 3 located on the same side of the backlight module 1 as the first liquid crystal cell 2 .

[0014] The first liquid crystal cell 2 is a display cell, responsible for displaying the image. It includes a first common electrode 4, a first liquid crystal layer 5, and a first pixel electrode 6. Liquid crystal molecules in the first liquid crystal layer 5 flip under the influence of the electric field formed by the first common electrode 4 and the first pixel electrode 6, controlling light emission.

[0015] The second liquid crystal cell 3 is a control liquid crystal cell that adjusts the viewing angle and can be located between the first liquid crystal cell 2 and the backlight module 1. The second liquid crystal cell 3 includes a first electrode 7, a second liquid crystal layer 8, and a second electrode 9. The first electrode 7 and the second electrode 9 can be located on opposite sides of the second liquid crystal layer 8, with the first electrode 7 being a common electrode. At least two second electrodes 9 have different widths d1 along the first direction x, and / or the distances d2 between at least some adjacent second electrodes 9 along the first direction x are different.

[0016] In the second liquid crystal cell 3, the second liquid crystal layer 8 may include cholesteric liquid crystal, also known as cholesteric multistable liquid crystal, exhibiting a focal conic texture (FC state). To control viewing angle, the second liquid crystal cell 3 first applies a critical voltage to the second electrode 9 and then steps down the voltage to zero, driving the cholesteric liquid crystal to the FC state. In the FC state, the cholesteric liquid crystal exhibits multiple domains, each containing a helical structure. In this state, the cholesteric liquid crystal strongly scatters incident light. Then, while in the FC state, different driving voltages less than the critical voltage are applied to the second electrode 9 to control the orientation of the multiple domains. This results in varying haze (scattering rate) within the focal conic texture state, thereby adjusting the scattering characteristics and propagation direction of light and thereby addressing varying viewing angles.

[0017] In an embodiment of the present invention, a separate second liquid crystal cell 3 is used to adjust the viewing angle. By controlling the scattering rate of the cholesteric liquid crystal in the second liquid crystal cell 3 in different ways, switching between multiple viewing angles can be achieved. This can then match the different viewing angle specifications of the vehicle, meeting the viewing angle requirements of the vehicle display in different application scenarios, and overcoming the problems of multiple customization requirements and high costs in related technologies.

[0018] Furthermore, the embodiment of the present invention also designs the structures of the second electrodes 9 at different positions in the second liquid crystal cell 3 in a differentiated manner. Figure 5 A schematic diagram of a flip of the liquid crystal in the second liquid crystal cell 3 provided in an embodiment of the present invention is shown in FIG. Figure 5 As shown, the differentiated design of the second electrode 9 can result in different electric field intensities at different locations of the second liquid crystal cell 3, causing the cholesteric liquid crystal at different locations to exhibit different deflection angles, thereby controlling the bright / dark states at different viewing angles and achieving different contrast ratios at different viewing angles. This structure of the second liquid crystal cell 3 allows for more refined adjustment of the light emission angle and intensity at different locations, thereby achieving improved visual color skewness, enabling differentiated viewing angle adjustment for each subarea, and further optimizing the multi-viewing angle capability of the display device.

[0019] Figure 6 This is another structural diagram of a display device provided by an embodiment of the present invention. Figure 7 This is another structural diagram of a display device provided by an embodiment of the present invention. In a feasible implementation manner, Figure 1 、 Figure 2 、 Figure 6 and Figure 7The second liquid crystal cell 3 includes a second pixel electrode 10, which includes a plurality of second electrodes 9 arranged along the first direction x. The widths of the second electrodes 9 in at least two of the second pixel electrodes 10 are different, and / or the distances between adjacent second electrodes 9 in at least two of the second pixel electrodes 10 are different.

[0020] In this structure, the second electrode 9 is an electrode strip in the second pixel electrode 10 .

[0021] In the second liquid crystal cell 3, the area where a second pixel electrode 10 is located can be considered a dimming zone. By differentiating the width and / or spacing of the electrode strips in at least two second pixel electrodes 10, different electric field strengths can be generated in these at least two dimming zones, thereby causing the cholesteric liquid crystals in these at least two dimming zones to exhibit different deflection angles, thereby achieving differentiated viewing angle control for these dimming zones. In this structure, the second liquid crystal cell 3 can achieve more refined adjustment of the light output of a single dimming zone, and the difference in light output from different dimming zones can be used to correct viewing angle color cast problems caused by light leakage in the first liquid crystal cell 2.

[0022] For example, if the first liquid crystal cell 2 is reddish at a certain oblique viewing angle, the second pixel electrode 10 in the dimming area of ​​the second liquid crystal cell 3 corresponding to the red sub-pixel area of ​​the first liquid crystal cell 2 can be designed differently so that this part of the dimming area has a smaller light output intensity at the oblique viewing angle, thereby adjusting the contrast of the second liquid crystal cell 3 at the oblique viewing angle, and thereby compensating for the red light leakage problem of the first liquid crystal cell 2 at the oblique viewing angle.

[0023] Further, combined with Figure 6 and Figure 7 The first liquid crystal cell 2 includes a plurality of sub-pixel regions 11, each sub-pixel region 11 includes a first pixel electrode 6. In a direction perpendicular to the plane where the display device is located, a second pixel electrode 10 overlaps with a sub-pixel region 11.

[0024] The sub-pixel region 11 includes a first sub-pixel region 12 and a second sub-pixel region 13 of different colors. The second pixel electrode 10 includes a first type second pixel electrode 14 overlapping the first sub-pixel region 12 and a second type second pixel electrode 15 overlapping the second sub-pixel region 13 .

[0025] In which, the width d1 (d11) of the second electrode 9 in the first type of second pixel electrode 14 is different from the width d1 (d12) of the second electrode 9 in the second type of second pixel electrode 15; and / or, the distance d2 (d21) between adjacent second electrodes 9 in the first type of second pixel electrode 14 is different from the distance d2 (d22) between adjacent second electrodes 9 in the second type of second pixel electrode 15.

[0026] In the above structure, a dimming area in the second liquid crystal cell 3 corresponds to a sub-pixel area 11 in the first liquid crystal cell 2, so that the second liquid crystal cell 3 can achieve pixel-level micro-control adjustment, which helps to make more precise corrections to the color shift problem of the viewing angle.

[0027] For example, still using the example of the first liquid crystal cell 2 exhibiting a reddish color shift at oblique viewing angles, the first sub-pixel region 12 includes a red sub-pixel region, and the second sub-pixel region 13 includes a green sub-pixel region and a blue sub-pixel region. By differentially designing the first-type second pixel electrode 14 corresponding to the red sub-pixel region, the second liquid crystal cell 3 can precisely adjust the light incident on the red sub-pixel region of the first liquid crystal cell 2, for example, by reducing the intensity of light incident on the red sub-pixel region at oblique viewing angles. This can then compensate for light leakage from the red sub-pixel region at oblique viewing angles and improve color shift.

[0028] In the embodiment of the present invention, the first sub-pixel region 12 and the second sub-pixel region 13 can be set according to the actual color cast. In other optional embodiments, the first sub-pixel region 12 can include a green sub-pixel region, and the second sub-pixel region 13 can include a red sub-pixel region and a blue sub-pixel region.

[0029] Furthermore, the designs of the first pixel electrodes 6 in the first sub-pixel region 12 and the second sub-pixel region 13 may be consistent.

[0030] In one possible embodiment, see Figure 7 The first pixel electrode 6 includes a plurality of third electrodes 16 arranged along the first direction x, that is, the third electrodes 16 are electrode strips in the first pixel electrode 6 .

[0031] In the first pixel electrode 6 , the sum of the width of a single third electrode 16 and the distance between adjacent third electrodes 16 is the first distance w1 .

[0032] In the second pixel electrode 10 , the sum of the width of a single second electrode 9 and the distance between adjacent second electrodes 9 is the second distance w2 .

[0033] The ratio of the second distance w2 to the first distance w1 is greater than or equal to And less than or equal to 3.

[0034] In this design, the width and spacing of the electrode strips in the second pixel electrode 10 are reasonably set based on the first pixel electrode 6 , which is more suitable for the situation where the second pixel electrode 10 corresponds to the sub-pixel area 11 on a one-to-one basis.

[0035] When the second pixel electrode 10 corresponds to the sub-pixel area 11 one by one, the area occupied by one second pixel electrode 10 is consistent with the area occupied by one first pixel electrode 6, so that the ratio between the second distance w2 and the first distance w1 satisfies greater than or equal to , which can prevent the electrode strips in the second pixel electrode 10 from being too narrow or the spacing between the electrode strips from being too narrow, so that the ratio of the second distance w2 to the first distance w1 is less than or equal to 3, and can further ensure that the second pixel electrode 10 includes a sufficient number of electrode strips within the same area to meet its electric field distribution requirements.

[0036] In the embodiment of the present invention, the second distance w2 corresponding to the first type of second pixel electrode 14 and the second type of second pixel electrode 15 are different. In one configuration, the second distance w2 corresponding to one of the first type of second pixel electrode 14 and the second type of second pixel electrode 15 can be equal to the first distance w1. That is, one of the first type of second pixel electrode 14 and the second type of second pixel electrode 15 can maintain the same design as the first pixel electrode 6 to simplify the overall design of the pixel electrode.

[0037] Figure 8 This is another structural diagram of a display device provided by an embodiment of the present invention. In a feasible implementation manner, Figure 3 、 Figure 4 and Figure 8 The second liquid crystal cell 3 includes a second pixel electrode 10 , and one second electrode 9 constitutes one second pixel electrode 10 , that is, one second electrode 9 can be regarded as an independent and complete second pixel electrode 10 .

[0038] The second liquid crystal cell 3 includes a plurality of partitions 17 , each partition 17 includes a plurality of second electrodes 9 , and in each partition 17 , at least some of the second electrodes 9 are arranged along the first direction x.

[0039] The widths of the second electrodes 9 in at least two subareas 17 in the first direction x are different, and / or the distances between adjacent second electrodes 9 in at least two subareas 17 in the first direction x are different.

[0040] The second liquid crystal box 3 under this design can perform zoned viewing angle control. By differentially designing the width and spacing of the second pixel electrodes 10 in different zones 17, the cholesteric liquid crystals in different zones 17 can have different deflection angles, thereby enabling different zones 17 to achieve different contrast ratios at the same viewing angle.

[0041] For example, in a large car screen, the driver may not want to see the screen in the passenger entertainment area, so the second liquid crystal box 3 can be used to divide the passenger entertainment area into an independent partition 17. By designing the second pixel electrode 10 in the passenger entertainment area differently, the passenger entertainment area can achieve a lower contrast at the driver's oblique viewing angle, so that the driver cannot see the screen in the passenger entertainment area at the driver's oblique viewing angle.

[0042] The at least two subareas 17 in the second liquid crystal cell 3 can be divided according to actual needs. For example, the second liquid crystal cell 3 may include three subareas 17 arranged along the first direction x, wherein the second pixel electrodes 10 in the two side subareas and the second pixel electrodes 10 in the middle subarea are designed differently, and further, the second pixel electrodes 10 in the two side subareas are designed to be consistent.

[0043] Or, as Figure 9 As shown, Figure 9 Another structural diagram of the second electrode in the display device provided in an embodiment of the present invention may also be that the widths of the second electrodes 9 in any two partitions 17 in the first direction x are different, and / or the distances between adjacent second electrodes 9 in any two partitions 17 in the first direction x are different.

[0044] In addition, it should be noted that in the embodiment of the present invention, the shapes of the first pixel electrode 6 and the second pixel electrode 10 are not limited. The first pixel electrode 6 and the second pixel electrode 10 can be a variety of different structures such as double domain, pseudo double domain, double V, corner, etc., or the first pixel electrode 6 and the second pixel electrode 10 can also be a strip structure.

[0045] Figure 10 This is another structural diagram of a display device provided by an embodiment of the present invention. Figure 11 This is another structural diagram of a display device provided by an embodiment of the present invention. In a feasible implementation manner, see Figure 6 、 Figure 10 and Figure 11 The first liquid crystal cell 2 includes a plurality of sub-pixel areas 11 , and each sub-pixel area 11 includes a first pixel electrode 6 .

[0046] The second liquid crystal cell 3 includes a second pixel electrode 10, and the second pixel electrode 10 includes at least one second electrode 9. For example, when the second electrode 9 is an electrode strip in the second pixel electrode 10, the second pixel electrode 10 includes a plurality of second electrodes 9; when the second electrode 9 is a complete second pixel electrode 10, the second pixel electrode 10 includes only one second electrode 9.

[0047] The second liquid crystal cell 3 includes a plurality of dimming zones 18, each of which includes a second pixel electrode 10. In a direction perpendicular to the plane of the display device, each dimming zone 18 overlaps with at least one sub-pixel zone 11, that is, each dimming zone 18 corresponds to at least one sub-pixel zone 11.

[0048] Each dimming zone 18 in the second liquid crystal cell 3 can be considered as a minimum dimming unit. By controlling the magnitude of the driving voltage received by the second pixel electrode 10 in different dimming zones 18, the deflection angle of the cholesteric liquid crystal in each dimming zone 18 can be controlled, thereby achieving different adjustments to the viewing angle of light in each dimming zone 18. For example, more refined adjustments can be made to at least two dimming zones 18 to improve the color deviation of the viewing angle, or the dimming zones 18 in at least two sub-zones 17 can be adjusted differently to achieve sub-zone viewing angle adjustment.

[0049] In one possible embodiment, see Figure 6 In a direction perpendicular to the plane where the display device is located, one dimming area 18 overlaps with one sub-pixel area 11.

[0050] In this design, the number of dimming zones 18 in the second liquid crystal cell 3 is equal to the number of sub-pixel zones 11 in the first liquid crystal cell 2. The multiple dimming zones 18 correspond one-to-one to the multiple sub-pixel zones 11. This second liquid crystal cell 3 can achieve pixel-level micro-control adjustment, specifically adjusting the light entering each sub-pixel zone 11, which helps to make more precise corrections to the visual angle color deviation problem of the first liquid crystal cell 2.

[0051] Alternatively, in another possible embodiment, see Figure 10 The first liquid crystal cell 2 includes m sub-pixel areas 11 of different colors, where m is an integer greater than or equal to 2.

[0052] In the direction perpendicular to the plane where the display device is located, a dimming area 18 is adjacent to the The sub-pixel areas 11 overlap, where a is an integer greater than or equal to 1.

[0053] For example, when the sub-pixel region 11 in the first liquid crystal cell 2 includes three sub-pixels, namely, a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region, m=3, and one dimming region 18 corresponds to adjacent When the sub-pixel area 11 in the first liquid crystal cell 2 includes four sub-pixels, namely, a red sub-pixel area, a green sub-pixel area, a blue sub-pixel area, and a white sub-pixel area, m=4, and one dimming area 18 corresponds to an adjacent sub-pixel area 11.

[0054] In this design, the number of sub-pixel regions 11 in the first liquid crystal cell 2 is an integer multiple (a times) of the number of dimming zones 18 in the second liquid crystal cell 3. Each dimming zone 18 corresponds to the same number of sub-pixel regions 11, and a regular pattern is formed between the dimming zones 18 and the sub-pixel regions 11. The smaller a, the finer the control of the second liquid crystal cell 3, but the corresponding power consumption will be slightly higher. The specific value of a can be determined based on the balance between the degree of control precision and the amount of power consumption.

[0055] Furthermore, a≤6. For example, when m=3, one dimming zone 18 corresponds to at most 18 sub-pixel zones 11, which can avoid the area of ​​a single dimming zone 18 being too large and ensure the fineness of the viewing angle control of the second liquid crystal cell 3.

[0056] Alternatively, in another possible embodiment, see Figure 11 The shape of the dimming area 18 is different from that of the sub-pixel area 11 , and the extending direction of at least one edge of the dimming area 18 is different from the extending direction of any edge of the sub-pixel area 11 .

[0057] In the above design, the second pixel electrode 10 and the first pixel electrode 6 have different patterns, which can reduce the mura phenomenon caused by regular reflection, etc. The shape of the dimming area 18 can be a triangle, parallelogram, rhombus, etc., and can be flexibly adjusted according to actual design requirements.

[0058] In a feasible embodiment, when the display device displays an image, in the overlapping dimming area 18 and sub-pixel area 11, the voltage received by the second pixel electrode 10 in the dimming area 18 is different from the voltage received by the first pixel electrode 6 in at least part of the sub-pixel area 11.

[0059] Taking a dimming zone 18 corresponding to a sub-pixel zone 11 as an example, when the display device displays a picture, the voltage received by the second pixel electrode 10 in the dimming zone 18 is different from the voltage received by the first pixel electrode 6 in its corresponding sub-pixel zone 11. That is, at the same pixel point, the grayscale value of the second liquid crystal cell 3 at the pixel point is different from the grayscale value of the first liquid crystal cell 2 at the pixel point, and the difference in light output brightness of the second liquid crystal cell 3 at the pixel point is used to correct the color cast problem of the first liquid crystal cell 2.

[0060] In one configuration, the second liquid crystal cell 3 may not include a filter layer. The light emitted by the second liquid crystal cell 3 is a single color. In this case, the second liquid crystal cell 3 corrects its color cast by utilizing only the differences in light output brightness at different viewing angles within the different dimming zones 18. Because the second liquid crystal cell 3 lacks a filter layer, it can achieve a higher light output efficiency.

[0061] In another structure, the second liquid crystal cell 3 may also include a filter layer. The light emitted by the second liquid crystal cell 3 has color. In this case, the second liquid crystal cell 3 may be further superimposed with color correction to compensate for the color cast of the second liquid crystal cell 3, thereby achieving a better correction effect on the color cast.

[0062] When the second liquid crystal cell 3 may include a filter layer, Figure 12 This is another structural diagram of a display device provided by an embodiment of the present invention. In a feasible implementation manner, as shown in FIG. Figure 12 As shown, the second liquid crystal cell 3 is located between the first liquid crystal cell 2 and the backlight module 1 .

[0063] The first liquid crystal cell 2 further includes a first filter layer 19 . The first filter layer 19 is located on a side of the first liquid crystal layer 5 away from the backlight module 1 . The first filter layer 19 includes a plurality of first color resists 20 for achieving color display.

[0064] The second liquid crystal cell 3 further includes a second filter layer 21, which is located on the side of the second liquid crystal layer 8 away from the backlight module 1. The second filter layer 21 includes a plurality of second color resists 22. Furthermore, in a direction perpendicular to the plane of the display device, the second color resists 22 have the same color as the first color resists 20 that overlap with them. While ensuring the correct light output color, the second color resists 22 can also provide color correction to compensate for the color cast of the second liquid crystal cell 3.

[0065] Further, see again Figure 12 In the first color resist 20 and the second color resist 22 of the same color, the thickness of the second color resist 22 is smaller than the thickness of the first color resist 20 .

[0066] The color display of the display device is mainly achieved by the first liquid crystal cell 2. The color resist in the second liquid crystal cell 3 is mainly used for superimposed color correction to compensate for the color cast of the second liquid crystal cell 3. Therefore, compared with the color resist in the first liquid crystal cell 2, the color resist in the second liquid crystal cell 3 can be set thinner, so that the color gamut of the second liquid crystal cell 3 is lower, so that this part of the color resist can play the role of color light emission without causing a large loss of transmittance, so that more light can pass through the color resist and enter the first liquid crystal cell 2.

[0067] In the embodiment of the present invention, the backlight module 1 may be a direct-lit backlight module or an edge-lit backlight module. Figure 13 This is another structural diagram of a display device provided by an embodiment of the present invention, taking an edge-type backlight module as an example. Figure 13 As shown, the backlight module 1 includes a light source 23 and a light guide plate 24 , as well as optical components including a diffusion film 25 and a brightness enhancement film 26 , wherein the light source 23 is located on the side of the light guide plate 24 .

[0068] In one structure, see Figure 13A first polarizer 27 may be included between the backlight module 1 and the second liquid crystal cell 3 , a diffusion film 28 and a second polarizer 29 may be included between the second liquid crystal cell 3 and the first liquid crystal cell 2 , and a third polarizer 30 may be included on the side of the first liquid crystal cell 2 away from the second liquid crystal cell 3 .

[0069] In addition, the display device further includes a cover plate 31 , which is bonded to the first liquid crystal cell 2 via an optical adhesive layer 32 .

[0070] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A display device, characterized in that: include: Backlight module; A first liquid crystal cell, located on one side of the backlight module, comprising a first common electrode, a first liquid crystal layer and a first pixel electrode; The second liquid crystal box is located on the same side of the backlight module as the first liquid crystal box, and includes a first electrode, a second liquid crystal layer and a second electrode; wherein, at least two of the second electrodes have different widths in the first direction, and / or, along the first direction, the distances between at least some adjacent second electrodes are different.

2. The display device according to claim 1, wherein The second liquid crystal cell includes a second pixel electrode, and the second pixel electrode includes a plurality of second electrodes arranged along the first direction; The widths of the second electrodes in at least two of the second pixel electrodes are different, and / or the distances between adjacent second electrodes in at least two of the second pixel electrodes are different.

3. The display device according to claim 2, wherein: The first liquid crystal cell includes a plurality of sub-pixel regions, and in a direction perpendicular to the plane where the display device is located, one second pixel electrode overlaps with one of the sub-pixel regions; The sub-pixel region includes a first sub-pixel region and a second sub-pixel region of different colors, and the second pixel electrode includes a first type of second pixel electrode overlapping with the first sub-pixel region and a second type of second pixel electrode overlapping with the second sub-pixel region; In which, the width of the second electrode in the first type of second pixel electrode is different from the width of the second electrode in the second type of second pixel electrode, and / or the distance between adjacent second electrodes in the first type of second pixel electrode is different from the distance between adjacent second electrodes in the second type of second pixel electrode.

4. The display device according to claim 2, wherein: The first pixel electrode includes a plurality of third electrodes arranged along the first direction, wherein in the first pixel electrode, the sum of the width of a single third electrode and the distance between adjacent third electrodes is a first distance; In the second pixel electrode, the sum of the width of a single second electrode and the distance between adjacent second electrodes is a second distance; The ratio of the second distance to the first distance is greater than or equal to And less than or equal to 3.

5. The display device according to claim 1, wherein The second liquid crystal cell includes a second pixel electrode, and one second electrode is a second pixel electrode; The second liquid crystal cell includes a plurality of partitions, each partition includes a plurality of second electrodes, and in each partition, at least part of the second electrodes are arranged along the first direction; The widths of the second electrodes in the first direction in at least two of the partitions are different, and / or the distances between adjacent second electrodes in the first direction in at least two of the partitions are different.

6. The display device according to claim 1, wherein The first liquid crystal cell includes a plurality of sub-pixel areas; The second liquid crystal cell includes a second pixel electrode, and the second pixel electrode includes at least one second electrode; The second liquid crystal box includes a plurality of dimming areas, one of the dimming areas includes one second pixel electrode, and in a direction perpendicular to the plane where the display device is located, one of the dimming areas overlaps with at least one of the sub-pixel areas.

7. The display device according to claim 6, wherein: In a direction perpendicular to the plane where the display device is located, one of the dimming areas overlaps with one of the sub-pixel areas.

8. The display device according to claim 6, wherein: The first liquid crystal cell includes m sub-pixel areas of different colors, where m is an integer greater than or equal to 2; In a direction perpendicular to the plane where the display device is located, one dimming zone is adjacent to the adjacent The sub-pixel areas overlap, where a is an integer greater than or equal to 1.

9. The display device according to claim 8, wherein a≤6。 10. The display device according to claim 6, wherein The shape of the dimming area is different from that of the sub-pixel area, and an extending direction of at least one edge of the dimming area is different from an extending direction of any edge of the sub-pixel area.

11. The display device according to claim 6, wherein When the display device displays an image, in the overlapping dimming area and sub-pixel area, the voltage received by the second pixel electrode in the dimming area is different from the voltage received by the first pixel electrode in at least part of the sub-pixel area.

12. The display device according to claim 1, wherein The second liquid crystal cell is located between the first liquid crystal cell and the backlight module; The first liquid crystal cell further includes a first filter layer, the first filter layer is located on a side of the first liquid crystal layer away from the backlight module, and the first filter layer includes a plurality of first color resists; The second liquid crystal cell further includes a second filter layer, the second filter layer is located on a side of the second liquid crystal layer away from the backlight module, and the second filter layer includes a plurality of second color resists; In the direction perpendicular to the plane where the display device is located, the second color resist has the same color as the first color resist overlapping with it.

13. The display device according to claim 12, wherein: In the first color resist and the second color resist of the same color, the thickness of the second color resist is smaller than the thickness of the first color resist.

Images