Display device

Abstract

The invention discloses a display device which comprises a display panel, a switching panel, a first polaroid and a second polaroid. The switching panel comprises a first substrate, a second substrate, a liquid crystal layer, a first electrode and a second electrode. At least one of the first electrode and the second electrode is disposed on the first substrate. The display panel, the first polaroid, the switching panel and the second polaroid are sequentially stacked in the vertical direction. The absorption axis of the first polarizer is substantially perpendicular to the vertical direction. The absorption axis of the second polarizer is substantially parallel to the vertical direction.

Description

Technical Field

[0001] The present invention relates to an optoelectronic device, and in particular to a display device. Background Art

[0002] Today's display devices have been widely used in various electronic products due to their advantages such as being light, thin, short and energy-saving, such as televisions, desktop computers, smart phones, notebooks, tablet computers, etc. With the development of display technology and the public's attention to privacy, the anti-peeping technology of display devices has received more and more attention, making R&D personnel spare no effort in the development of anti-peeping technology. Generally speaking, existing anti-peeping display devices mostly use a collimated backlight module and a switching panel to achieve switching between anti-peeping mode and sharing mode. However, when the existing anti-peeping display device is switched to sharing mode, there will be a situation where the difference between the brightness at the upper and lower large viewing angles and the brightness at the positive viewing angle is too large, affecting the display effect. Summary of the invention

[0003] The invention provides a display device with good performance.

[0004] The display device of the present invention comprises a display panel, a switching panel, a first polarizer and a second polarizer. The switching panel is arranged on the display panel. The switching panel comprises a first substrate, a second substrate, a liquid crystal layer, a first electrode and a second electrode. The second substrate is arranged opposite to the first substrate. The liquid crystal layer is arranged between the first substrate and the second substrate. At least one of the first electrode and the second electrode is arranged on the first substrate. The display panel, the first polarizer, the switching panel and the second polarizer are stacked in sequence in the vertical direction. The absorption axis of the first polarizer is substantially perpendicular to the vertical direction. The absorption axis of the second polarizer is substantially parallel to the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 It is a three-dimensional and exploded schematic diagram of a display device according to an embodiment of the present invention.

[0006] Figure 2 FIG. 4 is a cross-sectional schematic diagram of a switching panel of a display device according to an embodiment of the present invention.

[0007] Figure 3 The diagram is a top view of a first substrate, a first electrode, a second electrode, a rubbing direction of an alignment layer and an absorption axis of a first polarizer of a switching panel according to an embodiment of the present invention.

[0008] Figure 4 The display device in the anti-peeping mode according to an embodiment of the present invention is shown in various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ.

[0009] Figure 5 The display device in the sharing mode according to an embodiment of the present invention is shown in various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ.

[0010] Figure 6 It is a three-dimensional and exploded schematic diagram of a display device of a first comparative example.

[0011] Figure 7 It is a three-dimensional and exploded schematic diagram of a display device of a second comparative example.

[0012] Figure 8 It is a three-dimensional and exploded schematic diagram of a display device according to another embodiment of the present invention.

[0013] Fig. 9 FIG. 4 is a cross-sectional schematic diagram of a switching panel of a display device according to another embodiment of the present invention.

[0014] Fig.10 It is a top view schematically showing the first substrate, the first electrode, the second electrode, the rubbing direction of the alignment layer and the absorption axis of the first polarizer of the switching panel according to another embodiment of the present invention.

[0015] Fig.11 It is a three-dimensional and exploded schematic diagram of a display device according to another embodiment of the present invention.

[0016] Fig.12 FIG. 4 is a cross-sectional schematic diagram of a switching panel of a display device according to another embodiment of the present invention.

[0017] Fig.13 The diagram is a top view of the first substrate, the second substrate, the first electrode, the second electrode, the rubbing direction of the alignment layer and the absorption axis of the first polarizer of the switching panel according to another embodiment of the present invention.

[0018] Fig.14 Another embodiment of the present invention is a display device in an anti-peeping mode at various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ.

[0019] Fig.15 Another embodiment of the present invention is a display device in a sharing mode at various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ.

[0020] Fig.16 It is a three-dimensional and exploded schematic diagram of a display device according to yet another embodiment of the present invention.

[0021] Fig.17 A display device in an anti-peeping mode according to another embodiment of the present invention is shown in various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ.

[0022] Wherein, the reference numerals are:

[0023] 10, 10A, 10B, 10C, 20, 30: display device

[0024] 100, 850, 930: Display panel

[0025] 200, 200A, 200B, 830, 960: Switch panel

[0026] 210: First base

[0027] 220: Second base

[0028] 230: Liquid crystal layer

[0029] 240, 240A, 240B: first electrode

[0030] 242, 252: Branches

[0031] 242s: Slit

[0032] 250, 250A, 250B: second electrode

[0033] 260, 270: Alignment layer

[0034] 280: Insulation layer

[0035] 300: First polarizer

[0036] 310, 410, 510: Absorption axis

[0037] 400: Second polarizer

[0038] 500: The third polarizer

[0039] 600: Backlight

[0040] 700, 950: Compensation film

[0041] 710: Slow axis

[0042] 810, 910: Collimated backlight

[0043] 820: Privacy film

[0044] 840, 860, 920, 940, 970: Polarizer

[0045] D260: Friction direction

[0046] d:Thickness

[0047] K: Branch direction

[0048] x: first direction

[0049] y: second direction

[0050] z: vertical direction

[0051] α, β: Angle DETAILED DESCRIPTION

[0052] Reference will now be made in detail to exemplary embodiments of the present invention, examples of which are illustrated in the accompanying drawings. Whenever possible, the same reference numerals are used in the drawings and the description to refer to the same or like parts.

[0053] It should be understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "connected to" another element, it may be directly on or connected to another element, or an intermediate element may also exist. In contrast, when an element is referred to as being "directly on" or "directly connected to" another element, there are no intermediate elements. As used herein, "connection" may refer to physical and / or electrical connection. Furthermore, "electrical connection" or "coupling" may refer to the presence of other elements between two elements.

[0054] As used herein, "about", "approximately", or "substantially" includes the stated value and the average value within an acceptable deviation range of the particular value determined by one of ordinary skill in the art, taking into account the measurement in question and the particular amount of error associated with the measurement (i.e., the limitations of the measurement system). For example, "about" can mean within one or more standard deviations of the stated value, or within ±30%, ±20%, ±10%, ±5%. Furthermore, as used herein, "about", "approximately", or "substantially" can select a more acceptable deviation range or standard deviation depending on the optical property, etching property or other property, and can apply to all properties without a single standard deviation.

[0055] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the invention belongs. It will be further understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology and the present invention, and will not be interpreted as an idealized or overly formal meaning unless explicitly defined as such herein.

[0056] Figure 1 It is a three-dimensional and exploded schematic diagram of a display device according to an embodiment of the present invention. Figure 2 FIG. 4 is a cross-sectional schematic diagram of a switching panel of a display device according to an embodiment of the present invention. Figure 3The first substrate, the first electrode, the second electrode, the rubbing direction of the alignment layer and the absorption axis of the first polarizer of the switching panel of one embodiment of the present invention are shown in top view. For clear expression, the first direction x, the second direction y and the vertical direction z which are perpendicular to each other are drawn in each figure.

[0057] Please refer to Figure 1 The display device 10 includes a display panel 100, a switching panel 200, a first polarizer 300, and a second polarizer 400. The switching panel 200 is disposed on the display panel 100. The display panel 100, the first polarizer 300, the switching panel 200, and the second polarizer 400 are sequentially stacked in a vertical direction z.

[0058] In some embodiments, the display panel 100 is, for example, a liquid crystal display panel, wherein the liquid crystal display panel may include a pixel array substrate (not shown), an opposing substrate (not shown) disposed opposite the pixel array substrate, and a liquid crystal layer (not shown) located between the pixel array substrate and the opposing substrate.

[0059] In some embodiments, when the display panel 100 is a liquid crystal display panel, the display device 10 may further include a third polarizer 500 and a backlight source 600, wherein the backlight source 600, the third polarizer 500, the display panel 100, the first polarizer 300, the switching panel 200, and the second polarizer 400 are stacked in sequence in the vertical direction z. In some embodiments, the backlight source 600 is not a collimated backlight module. For example, in some embodiments, the backlight source 600 may include a light guide plate (not shown), a first brightness enhancement film (not shown), a second brightness enhancement film (not shown), and a diffuser (not shown), wherein the first brightness enhancement film, the second brightness enhancement film, and the diffuser are stacked in sequence on the light guide plate, and the extension direction of the multiple prisms of the first brightness enhancement film is substantially perpendicular to the extension direction of the multiple prisms of the second brightness enhancement film, but the present invention is not limited thereto.

[0060] In addition, it should be noted that the present invention does not limit the display panel 100 to be a liquid crystal display panel. In other embodiments, the display panel 100 may also be other types of display panels, such as an organic electroluminescent display panel, a micro light emitting diode display panel, or other self-luminous display panels. When the display panel 100 is a self-luminous display panel, the display device 10 may omit the third polarizer 500 and the backlight source 600.

[0061] Please refer to Figure 1 and Figure 2, the switching panel 200 includes a first substrate 210, a second substrate 220, a liquid crystal layer 230, a first electrode 240, and a second electrode 250. The second substrate 220 is disposed opposite to the first substrate 210. The liquid crystal layer 230 is disposed between the first substrate 210 and the second substrate 220. At least one of the first electrode 240 and the second electrode 250 is disposed on the first substrate 210. For example, in some embodiments, the first electrode 240 and the second electrode 250 may be selectively disposed on the first substrate 210, and the first electrode 240 and the second electrode 250 are located on the same side of the liquid crystal layer 230, but the present invention is not limited thereto.

[0062] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments, at least one of the first electrode 240 and the second electrode 250 has a plurality of branches 242, 252, the plurality of branches 242, 252 are separated from each other and extend in a branch direction K, and the branch direction K and the absorption axis 310 of the first polarizer 300 are at an angle β, and 0°<β<90°. In some embodiments, preferably, 35°<β<55°. For example, in some embodiments, β=45°, but the present invention is not limited thereto.

[0063] In some embodiments, the first electrode 240 and the second electrode 250 of the switching panel 200 may selectively have a plurality of branches 242 and a plurality of branches 252, respectively, wherein the plurality of branches 242 and the plurality of branches 252 are substantially located in the same plane and are arranged alternately. That is, in some embodiments, the switching panel 200 may be an in-plane switching (IPS) type. However, the present invention is not limited thereto, and in other embodiments, the switching panel 200 may also be other types, which will be illustrated in the following paragraphs with other figures.

[0064] Please refer to Figure 1 and Figure 2 In some embodiments, the switching panel 200 further includes an alignment layer 260 , wherein the alignment layer 260 is disposed between the liquid crystal layer 230 and the first electrode 240 . In some embodiments, the switching panel 200 further includes an alignment layer 270 , wherein the alignment layer 270 is disposed between the second substrate 220 and the liquid crystal layer 230 .

[0065] The first substrate 210 and the second substrate 220 are light-transmitting substrates. In some embodiments, the material of the light-transmitting substrate may be glass, quartz, organic polymer, or other applicable materials, but the present invention is not limited thereto. In some embodiments, the first electrode 240 and the second electrode 250 are light-transmitting electrodes. In some embodiments, the material of the light-transmitting electrode may be a metal oxide, such as indium tin oxide, indium zinc oxide, aluminum tin oxide, aluminum zinc oxide, indium germanium zinc oxide, other suitable oxides, or a stacked layer of at least two of the above, but the present invention is not limited thereto.

[0066] Please refer to Figure 1 , the absorption axis 310 of the first polarizer 300 is substantially perpendicular to the vertical direction z. The first polarizer 300 is located on a plane defined by the first direction x and the second direction y, and the absorption axis 310 of the first polarizer 300 is substantially parallel to the second direction y. The absorption axis 410 of the second polarizer 400 is substantially parallel to the vertical direction z. The absorption axis 410 of the second polarizer 400 is located in the thickness direction of the second polarizer 400. In some embodiments, the display device 10 includes a third polarizer 500, and the absorption axis 510 of the third polarizer 500 is substantially parallel to the first direction x.

[0067] Please refer to Figure 1 , Figure 2 and Figure 3 In some embodiments, the alignment layer 260 of the switching panel 200 has a rubbing direction D260 , and the rubbing direction D260 is substantially parallel or perpendicular to the absorption axis 310 of the first polarizer 300 .

[0068] Please refer to Figure 1 and Figure 2 , the liquid crystal layer 230 of the switching panel 200 has a phase retardation value Δn·d, where Δn is the birefringence of the liquid crystal layer 230, and d is the thickness of the liquid crystal layer 230. In some embodiments, the phase retardation value Δn·d may fall within a range of 120nm to 450nm. For example, in some embodiments, Δn·d may fall within a range of 300nm to 400nm, and the enabled switching panel 200 is equivalent to a three-quarter wave plate (or a negative quarter wave plate), but the present invention is not limited thereto.

[0069] Figure 4 The display device in the anti-peeping mode according to an embodiment of the present invention is shown in various azimuth angles. And the brightness distribution diagram at each tilt angle θ. Please refer to Figure 1 , Figure 2 and Figure 4, when the potential difference between the first electrode 240 and the second electrode 250 of the switching panel 200 is substantially zero (i.e., when the switching panel 200 is not enabled), the display device 10 is in the privacy mode. Specifically, in some embodiments, the light beam (not shown) from the display panel 100 has a linear polarization state in the first direction x after passing through the first polarizer 300; after the light beam having a linear polarization state in the first direction x passes through the disabled switching panel 200, the polarization state of the light beam remains unchanged and still has a linear polarization state in the first direction x; when the light beam from the disabled switching panel 200 and having a linear polarization state in the first direction x passes through the second polarizer 400 whose absorption axis 410 is parallel to the vertical direction z, the light beam has a linear polarization state in the first direction x at an azimuth angle. and azimuth In the first axial direction, if the light beam having a linear polarization state in the first direction x enters the second polarizer 400 at a larger angle, more light beams are absorbed; thereby, an anti-peeping effect in the first axial direction (ie, left and right viewing angles) can be achieved.

[0070] Figure 5 The display device in the sharing mode according to an embodiment of the present invention is shown in various azimuth angles. And the brightness distribution diagram at each tilt angle θ. Please refer to Figure 1 , Figure 2 and Figure 5 , the first electrode 240 and the second electrode 250 of the switching panel 200 have a potential difference (i.e., when the switching panel 200 is enabled), the display device 10 is in the share mode. Specifically, in some embodiments, the light beam (not shown) from the display panel 100 has a linear polarization state in the first direction x after passing through the first polarizer 300; after the light beam having a linear polarization state in the first direction x passes through the enabled switching panel 200 (equivalent to a three-quarter wave plate), the polarization state of the light beam changes to have a circular polarization state or a quasi-circular polarization state; when the light beam from the enabled switching panel 200 and having a circular polarization state or a quasi-circular polarization state passes through the second polarizer 400 whose absorption axis 410 is parallel to the vertical direction z, at all azimuths, the ratio of the light beam having a circular polarization state or a quasi-circular polarization state that can pass through the second polarizer 400 is the same or similar; thereby, a sharing effect at each viewing angle can be achieved.

[0071] It is worth mentioning that the display device 10 that can be switched to the anti-peeping mode or the sharing mode is realized by using the combination of the second polarizer 400 whose absorption axis 410 is parallel to the vertical direction z and the switching panel 200, so that the display device 10 in the sharing mode can be switched to the anti-peeping mode or the sharing mode at a large viewing angle (i.e., the azimuth angle) up and down. and azimuth The brightness at the large tilt angle θ on the surface is different from the brightness at the normal viewing angle (i.e. the azimuth angle Moreover, the difference in brightness at the tilt angle θ=0° is small, thereby improving the display effect of the display device 10 in the sharing mode. Figure 6 , Figure 7 Table 1 gives an example to illustrate this.

[0072] Figure 6 It is a three-dimensional and exploded schematic diagram of a display device of a first comparative example. Figure 6 The display device 20 of the first comparative example includes a collimated backlight source 810, a privacy film 820, a switching panel 830, a polarizer 840, a display panel 850, and a polarizer 860, wherein the privacy film 820, the switching panel 830, the polarizer 840, the display panel 850, and the polarizer 860 are sequentially stacked on the collimated backlight source 810. The display device 20 of the first comparative example adopts a scattering privacy protection technology.

[0073] Figure 7 It is a three-dimensional and exploded schematic diagram of a display device of a second comparative example. Figure 7 The display device 30 of the second comparative example includes a collimated backlight source 910, a polarizer 920, a display panel 930, a polarizer 940, a compensation film 950, a switching panel 960, and a polarizing plate 970, wherein the polarizer 920, the display panel 930, the polarizer 940, the compensation film 950, the switching panel 960, and the polarizing plate 970 are sequentially stacked on the collimated backlight source 910. The display device 30 of the second comparative example adopts a phase delay type privacy protection technology.

[0074] Table 1 below lists the display device 10 of an embodiment of the present invention, the display device 20 of the first comparative example, and the display device 30 of the second comparative example at various azimuth angles. and the brightness at the tilt angle θ and the brightness at the normal viewing angle (i.e. the azimuth angle The data in Table 1 below show that, in the sharing mode, the display device 10 of one embodiment of the present invention has a higher brightness than the display device 20 of the first comparative example and the display device 30 of the second comparative example in the large viewing angle (i.e., the azimuth angle The brightness at the large tilt angle θ on the surface is different from the brightness at the normal viewing angle (i.e. the azimuth angle For example, in the sharing mode, at a large viewing angle (ie, azimuth angle And at the tilt angle θ=45°), the ratio of the brightness at the upper viewing angle to the brightness at the normal viewing angle of the display device 20 of the first comparative example is 1.41%, the ratio of the brightness at the upper viewing angle to the brightness at the normal viewing angle of the display device 30 of the second comparative example is 1.8%, and the ratio of the brightness at the upper viewing angle to the brightness at the normal viewing angle of the display device 10 of an embodiment of the present invention is improved to 4.69%. That is to say, the difference between the brightness at the upper viewing angle and the brightness at the normal viewing angle of the display device 10 of an embodiment of the present invention is small.

[0075]

[0076] [Table 1]

[0077] It must be noted that the following embodiments use the component numbers and some contents of the previous embodiments, wherein the same number is used to represent the same or similar components, and the description of the same technical contents is omitted. The description of the omitted parts can refer to the previous embodiments, and the following embodiments will not be repeated.

[0078] Figure 8 It is a three-dimensional and exploded schematic diagram of a display device according to another embodiment of the present invention. Fig. 9 FIG. 4 is a cross-sectional schematic diagram of a switching panel of a display device according to another embodiment of the present invention. Fig.10 The first substrate, the first electrode, the second electrode, the rubbing direction of the alignment layer and the absorption axis of the first polarizer of the switching panel of another embodiment of the present invention are shown in top view. For clear expression, the first direction x, the second direction y and the vertical direction z which are perpendicular to each other are drawn in each figure.

[0079] Figure 8 , Fig. 9 and Fig.10 The display device 10A of the embodiment of Figure 1 , Figure 2 and Figure 3 The display device 10 of the embodiment is similar to that of the embodiment of FIG. 1 , and the difference between the two is that the switching panels 200 and 20A of the two are different. Figure 8 , Fig. 9 and Fig.10 Specifically, in this embodiment, an insulating layer 280 is sandwiched between the first electrode 240A and the second electrode 250A of the switching panel 200A, the first electrode 240A disposed on the insulating layer 280 has a plurality of branches 242, and the second electrode 250A overlaps the slits 242s between the plurality of branches 242. In short, in this embodiment, the switching panel 200A is a fringe field switching (FFS) type.

[0080] The display device 10A of this embodiment has similar functions and advantages to the display device 10 of the aforementioned embodiment, and will not be repeated here.

[0081] Fig.11 It is a three-dimensional and exploded schematic diagram of a display device according to another embodiment of the present invention. Fig.12 FIG. 4 is a cross-sectional schematic diagram of a switching panel of a display device according to another embodiment of the present invention. Fig.13 The first substrate, the second substrate, the first electrode, the second electrode, the rubbing direction of the alignment layer and the absorption axis of the first polarizer of the switching panel of another embodiment of the present invention are shown in top view. For clear expression, the first direction x, the second direction y and the vertical direction z which are perpendicular to each other are drawn in each figure. Fig.14 Another embodiment of the present invention is a display device in an anti-peeping mode at various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ. Fig.15 Another embodiment of the present invention is a display device in a sharing mode at various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ.

[0082] Fig.11 , Fig.12 and Fig.13 The display device 10B of the embodiment of Figure 1 , Figure 2 and Figure 3 The display device 10 of the embodiment is similar to the display device 10 of the embodiment, and the difference between the two is that the switching panels 200 and 200B of the two are different.

[0083] Please refer to Fig.11 , Fig.12 and Fig.13 Specifically, in this embodiment, the first electrode 240B and the second electrode 250B of the switching panel 200B can be selectively disposed on the first substrate 210 and the second substrate 220, respectively, and the first electrode 240B and the second electrode 250B are respectively located on both sides of the liquid crystal layer 230, but the present invention is not limited thereto.

[0084] In this embodiment, the alignment layer 260 of the switching panel 200B has a rubbing direction D260, and the rubbing direction D260 has an angle α with the absorption axis 310 of the first polarizer 300, and 0°<α<90°. In some embodiments, preferably, 35°<α<55°. For example, in some embodiments, α=45°, but the present invention is not limited thereto.

[0085] The liquid crystal layer 230 of the switching panel 200B has a phase retardation value Δn·d, where Δn is the birefringence of the liquid crystal layer 230, and d is the thickness of the liquid crystal layer 230. For example, in this embodiment, Δn·d=140nm, and the enabled switching panel 200B is equivalent to a quarter wave plate, but the present invention is not limited thereto.

[0086] The display device 10B of this embodiment has similar functions and advantages to the display device 10 of the aforementioned embodiment, and will not be described again here.

[0087] Fig.16 It is a three-dimensional and exploded schematic diagram of a display device according to yet another embodiment of the present invention. Fig.17 A display device in an anti-peeping mode according to another embodiment of the present invention is shown in various azimuth angles. And schematic diagram of brightness distribution at each tilt angle θ.

[0088] Fig.16 The display device 10C of the embodiment of the present invention and Figure 1 The display device 10 of the embodiment is similar to the display device 10 of the embodiment, and the difference between the two is: Fig.16 The display device 10C further includes a compensation film 700. Fig.16 The compensation film 700 is a biaxial film, and the compensation film 700 is disposed between the second polarizer 400 and the switching panel 200, and the slow axis 710 of the compensation film 700 is substantially parallel or perpendicular to the absorption axis 310 of the first polarizer 300. For example, in some embodiments, the in-plane phase difference of the compensation film 700 is R O , the thickness direction phase difference of the compensation film 700 is R th , 190nm≤R O ≤350nm, and -20nm≤R th ≤20nm, but the present invention is not limited thereto.

[0089] Fig.17 correspond Fig.16 The display device 10C includes the compensation film 700 . Figure 4 correspond Figure 1 The display device 10 does not include the compensation film 700. Fig.17 and Figure 4 It can be seen that the addition of the compensation film 700 can significantly improve the display device 10C in the anti-peeping mode in the non-axial direction (ie, the azimuth angle). Light leakage at angles other than 0°, 90°, 180° and 270°. For example, when the tilt angle θ is 45°, the display device 10 without the compensation film 700 has an azimuth angle of The ratio of the brightness at the tilt angle θ=45° to the brightness at the normal viewing angle is 35.7%, and the display device 10C including the compensation film 700 has a brightness of 0.1% at the azimuth angle. The ratio of the brightness at the tilt angle θ=45° to the brightness at the normal viewing angle is greatly reduced to 23.4%. In other words, the addition of the compensation film 700 can effectively improve the anti-peeping capability of the display device 10C in the non-axial direction.

[0090] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A display device, characterized in that: include: a display panel; A switching panel is disposed on the display panel, wherein the switching panel comprises: a first base; a second substrate, disposed opposite to the first substrate; a liquid crystal layer disposed between the first substrate and the second substrate; and a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is disposed on the first substrate; and A first polarizer and a second polarizer, wherein the display panel, the first polarizer, the switching panel and the second polarizer are stacked sequentially in a vertical direction; An absorption axis of the first polarizer is substantially perpendicular to the vertical direction, and an absorption axis of the second polarizer is substantially parallel to the vertical direction.

2. The display device according to claim 1, wherein: The first electrode and the second electrode are disposed on the first substrate and the second substrate respectively, and the switching panel further comprises: An alignment layer is disposed between the liquid crystal layer and the first electrode, wherein the alignment layer has a rubbing direction, and the rubbing direction has an angle with the absorption axis of the first polarizer, the angle is α, and 0°<α<90°.

3. The display device according to claim 2, wherein: Among them, 35°<α<55°.

4. The display device according to claim 1, wherein: The first electrode and the second electrode are disposed on the first substrate, and the switching panel further comprises: An alignment layer is disposed between the first electrode and the liquid crystal layer, wherein the alignment layer has a rubbing direction, and the rubbing direction is substantially parallel or perpendicular to the absorption axis of the first polarizer.

5. The display device according to claim 4, characterized in that At least one of the first electrode and the second electrode has a plurality of branches, the branches are separated from each other and extend in a branch direction, and the branch direction and the absorption axis of the first polarizer have an angle β, and 0°<β<90°.

6. The display device according to claim 5, characterized in that Among them, 35°<β<55°.

7. The display device according to claim 1, wherein: The liquid crystal layer has a phase retardation value, and the phase retardation value falls within the range of 120nm to 450nm.

8. The display device according to claim 1, wherein: Also includes: A biaxial retardation film is disposed between the second polarizer and the switching panel, wherein a slow axis of the biaxial retardation film is substantially parallel or perpendicular to the absorption axis of the first polarizer.

9. The display device according to claim 8, wherein: The phase difference within one surface of the biaxial retardation film is R O , and 190nm≤R O ≤350nm.

10. The display device according to claim 8, wherein: The phase difference in a thickness direction of the biaxial retardation film is R th , and -20nm≤R th ≤20nm.

11. The display device according to claim 1, wherein: A potential difference between the first electrode and the second electrode is substantially zero, and the display device is in an anti-peeping mode.

12. The display device according to claim 1, wherein: The first electrode and the second electrode have a potential difference, and the display device is in a sharing mode.

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