TWI699592B - Display apparatus - Google Patents

Abstract

A display apparatus includes a display panel, a liquid crystal (LC) lens, and a polarization compensation device. The display panel provides a first incident light. The LC lens disposed on the display panel. The LC lens includes a first substrate and a second substrate opposite to each other, a first LC layer, a first electrode layer, and a second electrode layer. The first LC layer is disposed between the first substrate and the second substrate. The first electrode layer is disposed between the first substrate and the first LC layer. The second electrode layer is disposed between the second substrate and the first LC layer. The polarization compensation device is disposed between the display panel and the LC lens. The polarization compensation device adjusts a polarization direction of the first incident light to be parallel to a long-axis direction of a plurality of LC molecules in the first LC layer.

Description

Display device

The invention relates to a display device, and more particularly to a display device having a liquid crystal lens and a polarization compensation element.

The main principle of stereoscopic display technology is to make the viewer’s left eye and right eye receive different images, and the images received by the left eye and right eye will be analyzed and overlapped by the brain to make the viewer perceive the hierarchy of the display And depth, and then create a three-dimensional effect. Therefore, to display a three-dimensional image on a flat-panel display, it is necessary to provide two sets of interlaced images on the same screen to simulate binocular vision respectively, and then through a specific optical element, the two eyes can receive the two sets of images to achieve the effect of the three-dimensional image.

At present, a liquid crystal lens stereoscopic display device has been proposed, which can be used to replace the traditional Parallax Barrier or Lenticular Lens display to realize the switchable effect of planar (2D)-stereoscopic (3D). However, the liquid crystal lens requires a complicated electrode design and a voltage driving method to make the liquid crystal lens approximate to a solid lens. Therefore, the technological development of the liquid crystal lens stereoscopic display device still faces many challenges.

An embodiment of the present invention provides a display device, which can adjust the polarization direction of the first incident light by a polarization compensation element, so as to effectively reduce the light leakage phenomenon and improve the cross-talk problem in 3D mode.

An embodiment of the present invention provides a display device including: a display panel, a liquid crystal lens, and a polarization compensation element. The display panel provides first incident light. The liquid crystal lens is arranged on the display panel. The liquid crystal lens includes: a first substrate and a second substrate, a first liquid crystal layer, a first electrode layer, and a second electrode layer that are arranged oppositely. The first liquid crystal layer is disposed between the first substrate and the second substrate. The first electrode layer is disposed between the first substrate and the first liquid crystal layer. The second electrode layer is disposed between the second substrate and the first liquid crystal layer. The polarization compensation element is arranged between the display panel and the liquid crystal lens. The polarization compensation element adjusts the polarization direction of the first incident light to be substantially parallel to the long axis direction of the plurality of liquid crystal molecules in the first liquid crystal layer.

In an embodiment of the present invention, the aforementioned polarization compensation element includes a third substrate and a fourth substrate, a second liquid crystal layer, a common electrode layer, a scan electrode layer, and an insulating layer, which are arranged oppositely. The second liquid crystal layer is disposed between the third substrate and the fourth substrate. The common electrode layer is disposed between the fourth substrate and the second liquid crystal layer. The scan electrode layer is disposed between the common electrode layer and the second liquid crystal layer. The insulating layer is disposed between the common electrode layer and the scan electrode layer.

In an embodiment of the present invention, the aforementioned first electrode layer includes a plurality of first wide electrodes and a plurality of first narrow electrodes alternately arranged. The scan electrode layer includes a plurality of first scan electrodes and a plurality of second scan electrodes arranged alternately. The first wide electrode overlaps the first scan electrode, and the first narrow electrode overlaps the second scan electrode.

In an embodiment of the present invention, the distance between two adjacent first wide electrodes is the same as the distance between two adjacent first scan electrodes.

In an embodiment of the present invention, the aforementioned second electrode layer includes a plurality of second wide electrodes and a plurality of second narrow electrodes alternately arranged. The first wide electrode overlaps the second narrow electrode, and the first narrow electrode overlaps the second wide electrode.

In an embodiment of the present invention, the distance between two adjacent first wide electrodes is the same as the distance between two adjacent second wide electrodes.

In an embodiment of the present invention, when the polarization compensation element is on-state, there is a horizontal electric field between two adjacent first scan electrodes and second scan electrodes, so that the second liquid crystal layer The long axis directions of the plurality of liquid crystal molecules are shifted by the electric field in the horizontal direction.

In an embodiment of the present invention, in the first region, there is an angle α between the long axis direction of the liquid crystal molecules in the second liquid crystal layer and the polarization direction of the first incident light.

In an embodiment of the present invention, after the first incident light passes through the polarization compensation element, the second incident light is formed to enter the liquid crystal lens, and the polarization direction of the second incident light in the first region is the same as that in the second liquid crystal layer. There is another angle β between the long axis directions of the liquid crystal molecules, and the value of the angle β is approximately equal to the value of the angle α.

In an embodiment of the present invention, in the first zone, there is an angle γ between the polarization direction of the second incident light and the polarization direction of the first incident light, and the value of the angle γ is approximately equal to twice the angle α. value.

Based on the above, an embodiment of the present invention adjusts the polarization direction of the first incident light to be parallel to the long axis direction of the liquid crystal molecules in the first liquid crystal layer by using a polarization compensation element, which can effectively reduce light leakage and improve the 3D mode Crosstalk noise problem.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail in conjunction with the accompanying drawings.

The present invention is explained more fully with reference to the drawings of this embodiment. However, the present invention can also be embodied in various different forms and should not be limited to the embodiments described herein. The thickness of the layers and regions in the drawing will be exaggerated for clarity. The same or similar reference numerals indicate the same or similar elements, and the following paragraphs will not repeat them one by one.

FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the invention. 2A is a schematic diagram showing the relationship between the polarization direction of the first incident light in the first region and the long axis direction of the liquid crystal molecules in the second liquid crystal layer according to an embodiment of the present invention. 2B is a schematic diagram showing the relationship between the polarization direction of the first incident light in the second region and the long axis direction of the liquid crystal molecules in the second liquid crystal layer according to an embodiment of the present invention.

Please refer to FIG. 1, an embodiment of the present invention provides a display device 10 including: a display panel 100, a polarization compensation element 200 and a liquid crystal lens 300. The display panel 100 may provide first incident light 150 having a polarization direction 150P. In some embodiments, the display panel 100 may be any member capable of displaying images, such as a liquid crystal display panel, an organic electroluminescent display panel, a plasma display panel, an electrophoretic display panel, a field emission display panel, etc., or other types of display panels . In addition, when the display panel 100 uses a non-self-luminous material (for example, liquid crystal material) as the display medium, it may optionally include a light source module located under the display panel 100 to provide the light source required by the display panel 100.

The liquid crystal lens 300 is disposed on the display panel 100. Specifically, the liquid crystal lens 300 includes: a first substrate 310, a second substrate 320, a first liquid crystal layer 330, a first electrode layer 312, a first alignment layer 318, a second electrode layer 322, and a second alignment layer 328. As shown in FIG. 1, the first substrate 310 and the second substrate 320 are arranged opposite to each other. In some embodiments, the first substrate 310 and the second substrate 320 may be glass substrates or quartz substrates, for example. In other embodiments, the first substrate 310 and the second substrate 320 may also be transparent substrates made of other materials, such as polymer materials. The first liquid crystal layer 330 is disposed between the first substrate 310 and the second substrate 320. The first liquid crystal layer 330 includes a plurality of liquid crystal molecules 332, wherein the liquid crystal molecules 332 have optical anisotropy in an electric field and are optically isotropic under no electric field conditions.

The first electrode layer 312 is disposed between the first substrate 310 and the first liquid crystal layer 330. In detail, the first electrode layer 312 includes a plurality of first wide electrodes 314 and a plurality of first narrow electrodes 316. As shown in FIG. 1, viewed from the Y direction, the width of the first wide electrode 314 is greater than the width of the first narrow electrode 316, and the first wide electrode 314 and the first narrow electrode 316 are alternately arranged along the X direction. There is a distance P1 between two adjacent first wide electrodes 314 (or two adjacent first narrow electrodes 316), wherein the distance P1 can be adjusted according to actual design requirements. In some embodiments, the first wide electrode 314 and the first narrow electrode 316 may be strip electrodes extending along the Y direction. The first alignment layer 318 is disposed between the first electrode layer 312 and the first liquid crystal layer 330. The first alignment layer 318 can align the liquid crystal molecules 332 in the first liquid crystal layer 330.

The second electrode layer 322 is disposed between the second substrate 320 and the first liquid crystal layer 330. In detail, the second electrode layer 322 includes a plurality of second wide electrodes 324 and a plurality of second narrow electrodes 326. As shown in FIG. 1, viewed from the Y direction, the width of the second wide electrode 324 is greater than the width of the second narrow electrode 326, in other words, the width of the second wide electrode 324 extending in the X direction is greater than that of the second narrow electrode 326 The width extends along the X direction, and the second wide electrodes 324 and the second narrow electrodes 326 are alternately arranged along the X direction. There is a distance P2 between two adjacent second wide electrodes 324 (or two adjacent second narrow electrodes 326), wherein the distance P2 can be adjusted according to actual design requirements. In some embodiments, the second wide electrode 324 and the second narrow electrode 326 may be strip electrodes extending along the Y direction. As shown in FIG. 1, a third area A2 is defined between the adjacent second wide electrode 324 and the second narrow electrode 326 to form a plurality of third areas A2 arranged along the X direction. Each second wide electrode 324 and each The second narrow electrodes 326 respectively define fourth regions B2 to form a plurality of fourth regions B2 arranged along the X direction. The third regions A2 and fourth regions B2 are alternately arranged along the X direction. Viewed along the Z direction or toward the XY plane, the Z direction is perpendicular to a normal direction of the first substrate 310 or the second substrate 320, the second wide electrode 324 corresponds to and overlaps the first narrow electrode 316, and the second The narrow electrodes 326 respectively correspond to and overlap the first wide electrodes 314. That is, the second wide electrode 324 and the first wide electrode 314 are alternately arranged, and the second narrow electrode 326 and the first narrow electrode 316 are alternately arranged. In another embodiment, the pitch P2 is the same as the pitch P1. In an alternative embodiment, the material of the first electrode layer 312 and the second electrode layer 322 may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO), indium gallium oxide (IGO), indium gallium zinc oxide (IGZO), other suitable light-transmitting conductive materials or conductive materials whose line width is not easy to be felt by the human eye. In other embodiments, the first electrode layer 312 and the second electrode layer 322 may have the same conductive material or different conductive materials.

The second alignment layer 328 is disposed between the second electrode layer 322 and the first liquid crystal layer 330. In some embodiments, the alignment direction of the second alignment layer 328 is substantially parallel to the alignment direction of the first alignment layer 318. In some embodiments, the materials of the first alignment layer 318 and the second alignment layer 328 may be, for example, polyimide (PI), methyl cellulose (MC), polymethyl methacrylate ( Polymethylmethacrylate (PMMA), polyvinyl alcohol (PVA), polyamide (polyamide), silicon oxide (SiO), silicon nitride (silicon nitride), silicon carbide (silicon carbonate) or insulating Alumina (aluminum oxide) etc. In other embodiments, the first alignment layer 318 and the second alignment layer 328 may have the same material or different materials.

In this embodiment, when the first electrode layer 312 and the second electrode layer 322 are not driven (or in the closed state), the first liquid crystal layer 330 is in a homogenous state as a whole. In this case, after the image information provided in the display panel 100 passes through the liquid crystal lens 300, the light 350 is provided in the original transmission direction to display the two-dimensional image. That is, in the flat display mode, the liquid crystal lens 300 may not be driven.

In addition, when the first electrode layer 312 and the second electrode layer 322 are driven (or turned on), they can provide an electric field to change the state of the first liquid crystal layer 330 to present a specific refractive index distribution. At this time, the refractive index distribution of the first liquid crystal layer 330 may provide an effect similar to an optical lens. Therefore, the image information provided in the display panel 100 can be emitted in different directions (that is, to form different viewing areas) through the action of the liquid crystal lens 300 to provide the light 350 for displaying the three-dimensional image. Therefore, the display device 10 may have at least two display modes, namely a stereoscopic (3D) display mode and a flat (2D) display mode.

As shown in FIG. 1, the refractive index distribution of the first liquid crystal layer 330 may exhibit a curve 330R, for example, so as to define the first liquid crystal layer 330 to define a plurality of lens units 302. In some embodiments, the refractive index distribution in each lens unit 302 gradually changes outward from the central area (for example, gradually becomes larger or gradually becomes smaller).

Theoretically, the rubbing direction or long axis direction of the liquid crystal molecules 332 in the first liquid crystal layer 330 should be exactly the same as the polarization direction 150P of the first incident light 150, so as to achieve completely extraordinary light (extra-ordinary light, Also known as e-light) 3D image. However, in fact, because the liquid crystal molecules 332 are affected by the lateral electric field of the first electrode layer 312 or the second electrode layer 322, the liquid crystal molecules 332 deviate from the original alignment direction, thereby forming a certain amount of ordinary light (or ordinary light). Called o light) 2D image. Since the o-ray does not have a lens effect in the liquid crystal lens 300, it will cause light leakage, thereby increasing the crosstalk noise in the 3D mode. In order to solve the above-mentioned problems, the display device 10 of this embodiment arranges the polarization compensation element 200 between the display panel 100 and the liquid crystal lens 300 to adjust the polarization direction 150P of the first incident light 150, thereby effectively reducing light leakage and improving the 3D mode. Crosstalk noise problem under the following.

Specifically, the polarization compensation element 200 includes: a third substrate 210, a fourth substrate 220, a second liquid crystal layer 230, a common electrode layer 221, a scan electrode layer 222, a third alignment layer 218, a fourth alignment layer 228, and an insulating layer 223.

As shown in FIG. 1, the third substrate 210 and the fourth substrate 220 are arranged opposite to each other. In some embodiments, the third substrate 210 and the fourth substrate 220 may be, for example, a glass substrate, a quartz substrate, or a polymer substrate. The second liquid crystal layer 230 is disposed between the third substrate 210 and the fourth substrate 220. The second liquid crystal layer 230 includes a plurality of liquid crystal molecules 232, wherein the liquid crystal molecules 232 have optical anisotropy in an electric field and are optically isotropic under no electric field conditions. The third alignment layer 218 is disposed between the third substrate 210 and the second liquid crystal layer 230. The third alignment layer 218 can align the liquid crystal molecules 232 in the second liquid crystal layer 230.

The common electrode layer 221 is disposed between the fourth substrate 220 and the second liquid crystal layer 230. For example, the common electrode layer 221 completely covers the lower surface of the fourth substrate 220. The scan electrode layer 222 is disposed between the common electrode layer 221 and the second liquid crystal layer 230. In some embodiments, the scan electrode layer 222 includes a plurality of first scan electrodes 224 and a plurality of second scan electrodes 226. As shown in FIG. 1, the first scan electrode 224 corresponds to and overlaps with the first wide electrode 314, and the second scan electrode 226 corresponds to and overlaps with the first narrow electrode 316 respectively. Viewed from the Y direction, the first scan electrode 224 and the second scan electrode 226 have the same width. In other words, the width of the first scan electrode 224 extending in the X direction is equal to the width of the second scan electrode 226 extending in the X direction. , And alternately arranged along the X direction with the same spacing. There is a pitch P3 between two adjacent first scan electrodes 224 (or two adjacent second scan electrodes 226), wherein the pitch P3 is the same as the pitch P1. As shown in FIG. 1, a first area A1 is defined between adjacent first scan electrodes 224 and second scan electrodes 226 to form a plurality of first areas A1 arranged along the X direction. Each first scan electrode 224 and each The second scan electrodes 226 respectively define second regions B1 to form a plurality of second regions B1 arranged along the X direction. The first regions A1 and the second regions B1 are alternately arranged along the X direction. In an alternative embodiment, the material of the common electrode layer 221 and the scan electrode layer 222 may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO). ), indium gallium oxide (IGO), indium gallium zinc oxide (IGZO), other suitable light-transmitting conductive materials or conductive materials whose line width is not easy to be felt by the human eye. In other embodiments, the common electrode layer 221 and the scan electrode layer 222 may have the same conductive material or different conductive materials.

The insulating layer 223 is disposed between the common electrode layer 221 and the scan electrode layer 222 to isolate the common electrode layer 221 and the scan electrode layer 222. In some embodiments, the material of the insulating layer 223 includes an inorganic dielectric material, which can be, for example, silicon oxide, silicon nitride, silicon oxynitride, other suitable dielectric materials, or a combination thereof.

The fourth alignment layer 228 is disposed between the scan electrode layer 222 and the second liquid crystal layer 230. In some embodiments, the alignment direction of the fourth alignment layer 228 is substantially parallel to the alignment direction of the third alignment layer 218. In some embodiments, the materials of the third alignment layer 218 and the fourth alignment layer 228 may be, for example, polyimide (PI), methyl cellulose (MC), polymethyl methacrylate ( Polymethylmethacrylate (PMMA), polyvinyl alcohol (PVA), polyamide (polyamide), silicon oxide (SiO), silicon nitride (silicon nitride), silicon carbide (silicon carbonate) or insulating Alumina (aluminum oxide) etc. In other embodiments, the third alignment layer 218 and the fourth alignment layer 228 may have the same material or different materials.

In this embodiment, when the polarization compensation element 200 is on-state, there is a horizontal electric field 235 between two adjacent first scan electrodes 224 and second scan electrodes 226, that is, in the first region A1 has a horizontal electric field 235, so that the long axis direction 232LA1 of the liquid crystal molecules 232 in the second liquid crystal layer 230 is offset along the horizontal electric field 235. In this case, as shown in FIGS. 1 and 2A, the In other words, in the first area A1, the long axis direction 232LA1 of the liquid crystal molecules 232 in the second liquid crystal layer 230 and the polarization direction 150P of the first incident light 150 have an included angle α, and the value of the included angle α is not equal to 180 degrees. In addition, as shown in FIGS. 1 and 2B, in the second region B1, the long axis direction 232LB1 of the liquid crystal molecules 232 in the second liquid crystal layer 230 is substantially parallel to the polarization direction 150P of the first incident light 150, so it passes through the The polarization direction of the light of the second liquid crystal layer 230 in the second zone B1 is substantially unchanged.

It is worth noting that after the first incident light 150 passes through the polarization compensation element 200, the second incident light 250 may be formed to enter the liquid crystal lens 300. In this case, as shown in FIGS. 1 and 2C, in the first area A1 and the third area A2 that overlap each other in the Z direction, the polarization direction 250PA of the second incident light 250 and the liquid crystal in the second liquid crystal layer 230 The long axis directions 232LA1 of the molecules 232 have an angle β between them. For example, the value of the angle β is approximately equal to the value of the angle α, and the value of the angle α is 90 degrees, but not limited to this. That is, the value of the included angle γ between the polarization direction 250PA of the second incident light 250 and the polarization direction 150P of the first incident light 150 is approximately equal to the value of the included angle α twice. In addition, as shown in FIGS. 1 and 2D, in the second region B1 and the fourth region B2 that overlap each other in the Z direction, the long axis direction 232LB1 of the liquid crystal molecules 232 in the second liquid crystal layer 230 and the first liquid crystal layer 330 The long axis direction 332LB2 of the liquid crystal molecules 332 and the polarization direction 250PB of the second incident light 250 are substantially parallel to each other, so the polarization direction of the light passing through this area is substantially unchanged.

In some embodiments, the horizontal electric field 235 can be controlled by the voltage applied to the scan electrode layer 222 to adjust the angle α. Therefore, in this embodiment, the polarization compensation element 200 can adjust the polarization direction 250PA or 250PB of the second incident light 250 entering the liquid crystal lens 300 to match the alignment direction or long axis of the corresponding liquid crystal molecule 332 in the first liquid crystal layer 330. The directions 332LA2 or 332LB2 are exactly the same or almost parallel, thereby effectively reducing light leakage caused by o-rays. In an alternative embodiment, since the second incident light 250 passing through the polarization compensation element 200 only changes the polarization direction and is not filtered out, the display device 10 of this embodiment can have better display brightness.

In summary, one embodiment of the present invention adjusts the polarization direction of the first incident light to be parallel to the long axis direction of the liquid crystal molecules in the first liquid crystal layer by using a polarization compensation element, which can effectively reduce the occurrence of o-light. The phenomenon of light leakage and improve the crosstalk noise problem in 3D mode, thereby improving the display quality of 3D images. In addition, the second incident light passing through the polarization compensation element only changes the polarization direction without being filtered out. Therefore, the display device of this embodiment can have better display brightness.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Anyone with ordinary knowledge in the relevant technical field can make some changes and modifications without departing from the spirit and scope of the present invention. The scope of protection of the present invention shall be subject to those defined by the attached patent scope.

10: Display device

100: display panel

150: first incident light

150P: Polarization direction of the first incident light

200: Polarization compensation element

210: third substrate

218: third alignment layer

220: fourth substrate

221: common electrode layer

222: Scan electrode layer

223: Insulation layer

224: first scan electrode

226: second scan electrode

228: fourth alignment layer

230: second liquid crystal layer

232: liquid crystal molecules

232LA1, 232LB1, 332LA2, 332LB2: Long axis direction of liquid crystal molecules

235: Horizontal electric field

250: second incident light

250PA, 250PB: the polarization direction of the second incident light

300: liquid crystal lens

302: lens unit

310: First substrate

312: first electrode layer

314: The first wide electrode

316: The first narrow electrode

318: first alignment layer

320: second substrate

322: second electrode layer

324: second wide electrode

326: second narrow electrode

328: second alignment layer

330: first liquid crystal layer

330R: Curve

332: Liquid Crystal Molecules

350: light

α, β, γ: included angle

A1: Zone 1

B1: Zone 2

A2: Zone 3

B2: District 4

P1, P2, P3: pitch

FIG. 1 is a schematic cross-sectional view of a display device according to an embodiment of the invention. 2A is a schematic diagram showing the relationship between the polarization direction of the first incident light in the first region and the long axis direction of the liquid crystal molecules in the second liquid crystal layer according to an embodiment of the present invention. 2B is a schematic diagram showing the relationship between the polarization direction of the first incident light in the second region and the long axis direction of the liquid crystal molecules in the second liquid crystal layer according to an embodiment of the present invention. 2C illustrates the polarization direction of the first incident light, the long axis direction of the liquid crystal molecules in the second liquid crystal layer, the polarization direction of the second incident light, and the first region in the first region and the corresponding third region according to an embodiment of the present invention. A schematic diagram of the relationship between the long axis directions of the liquid crystal molecules in a liquid crystal layer. 2D illustrates the polarization direction of the first incident light, the long axis direction of the liquid crystal molecules in the second liquid crystal layer, the polarization direction of the second incident light, and the first incident light in the second area and the corresponding fourth area of an embodiment of the present invention. A schematic diagram of the relationship between the long axis directions of the liquid crystal molecules in a liquid crystal layer.

10: Display device

100: display panel

150: first incident light

150P: Polarization direction of the first incident light

200: Polarization compensation element

210: third substrate

218: third alignment layer

220: fourth substrate

221: common electrode layer

222: Scan electrode layer

223: Insulation layer

224: first scan electrode

226: second scan electrode

228: fourth alignment layer

230: second liquid crystal layer

232: liquid crystal molecules

235: Horizontal electric field

250: second incident light

300: liquid crystal lens

302: lens unit

310: First substrate

312: first electrode layer

314: The first wide electrode

316: The first narrow electrode

318: first alignment layer

320: second substrate

322: second electrode layer

324: second wide electrode

326: second narrow electrode

328: second alignment layer

330: first liquid crystal layer

330R: Curve

332: Liquid Crystal Molecules

350: light

A1: Zone 1

B1: Zone 2

A2: Zone 3

B2: District 4

P1, P2, P3: pitch

Claims (10)

A display device, comprising: a display panel providing a first incident light; a liquid crystal lens arranged on the display panel, wherein the liquid crystal lens comprises: a first substrate and a second substrate arranged oppositely; a first liquid crystal Layer disposed between the first substrate and the second substrate; a first electrode layer disposed between the first substrate and the first liquid crystal layer; and a second electrode layer disposed on the second substrate And a polarization compensation element disposed between the display panel and the liquid crystal lens, wherein the polarization compensation element adjusts a polarization direction of the first incident light to be aligned with the first liquid crystal layer A long axis direction of the plurality of liquid crystal molecules is substantially parallel, and the polarization compensation element includes: a third substrate and a fourth substrate arranged opposite to each other; a second liquid crystal layer arranged on the third substrate and the fourth substrate Between the substrates; a common electrode layer, configured between the fourth substrate and the second liquid crystal layer; a scan electrode layer, configured between the common electrode layer and the second liquid crystal layer, wherein the scan electrode layer includes A plurality of first scan electrodes and a plurality of second scan electrodes alternately arranged; and an insulating layer disposed between the common electrode layer and the scan electrode layer. According to the display device described in claim 1, wherein the first electrode layer includes a plurality of first wide electrodes and a plurality of first narrow electrodes arranged alternately, and the first wide electrodes overlap the first Scan electrodes, the first narrow electrodes overlap the second scan electrodes, respectively. As for the display device described in item 2 of the scope of patent application, the distance between two adjacent first wide electrodes is the same as the distance between two adjacent first scan electrodes. As for the display device described in claim 2, wherein the second electrode layer includes a plurality of second wide electrodes and a plurality of second narrow electrodes arranged alternately, and the first wide electrodes overlap the second Narrow electrodes, the first narrow electrodes overlap the second wide electrodes respectively. As for the display device described in item 4 of the scope of patent application, the distance between two adjacent first wide electrodes is the same as the distance between two adjacent second wide electrodes. As for the display device described in claim 2, wherein when the polarization compensation element is turned on, there is a horizontal electric field between the two adjacent first scan electrodes and the second scan electrodes, so that A long axis direction of a plurality of liquid crystal molecules in the second liquid crystal layer is offset along the horizontal direction. According to the display device described in claim 6, wherein a first area is defined between the adjacent first scan electrode and the second scan electrode, and in the first area, in the second liquid crystal layer There is an included angle α between the long axis direction of at least one of the liquid crystal molecules and the polarization direction of the first incident light, and the value of the included angle α is not equal to 180 degrees. As for the display device described in claim 7, wherein the second electrode layer includes a plurality of second wide electrodes and a plurality of second narrow electrodes arranged alternately, and the first wide electrodes overlap the second Narrow electrodes, the first narrow electrodes overlap the second wide electrodes, the first scan electrodes and the second scan electrodes respectively define a plurality of second regions, and the adjacent second wide electrodes and A third area is defined between the second narrow electrodes. After the first incident light passes through the polarization compensation element, a second incident light is formed to enter the liquid crystal lens, and overlaps with each other in a normal direction. In the first zone and the third zone, the polarization direction of the second incident light and the long axis direction of at least one of the liquid crystal molecules in the second liquid crystal layer have an included angle β, which is between The value is approximately equal to the value of the angle α. The display device according to claim 8, wherein in the first region and the third region overlapping each other in the normal direction, at least one of the liquid crystal molecules in the first liquid crystal layer The long axis direction and the polarization direction of the second incident light are substantially parallel. The display device according to claim 9, wherein in the first area and the third area overlapping each other in the normal direction, the polarization direction of the second incident light is the same as that of the first incident light The value of the angle γ between the polarization directions is approximately equal to twice the value of the angle α.

Images