CN110456554B - Display device - Google Patents

Abstract

Translated fromChinese

本发明公开了一种显示装置，包括：显示面板、液晶透镜以及偏振补偿元件。显示面板提供第一入射光。液晶透镜配置于显示面板上。液晶透镜包括：相对配置的第一基板与第二基板、第一液晶层、第一电极层以及第二电极层。第一液晶层配置于第一基板与第二基板之间。第一电极层配置于第一基板与第一液晶层之间。第二电极层配置于第二基板与第一液晶层之间。偏振补偿元件配置于显示面板与液晶透镜之间。偏振补偿元件将第一入射光的偏振方向调整为与第一液晶层中的多个液晶分子的长轴方向平行。

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

Description

Display device

Technical Field

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

Background

The main principle of the stereoscopic display technology is that the left eye and the right eye of a viewer respectively receive different images, and the images received by the left eye and the right eye are analyzed and overlapped by the brain so that the viewer can perceive the layering sense and the depth of a display picture, thereby generating stereoscopic sensation. Therefore, to display a stereoscopic image on a flat panel display, two sets of images interlaced with each other are provided on the same screen to simulate the vision of two eyes, and then two eyes receive the two sets of images respectively through a specific optical element to achieve the effect of a stereoscopic image.

A liquid crystal Lenticular stereoscopic display device has been proposed, which can be used to replace the conventional Barrier (parallel Barrier) or Lenticular Lens (Lenticular Lens) display to achieve the effect of planar (2D) -stereoscopic (3D) switchable. However, the liquid crystal lens requires a complicated electrode design and a voltage driving manner to make the liquid crystal lens approximate a solid lens. Therefore, the technical development of the liquid crystal lenticular stereoscopic display device still faces many challenges.

Disclosure of Invention

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

An embodiment of the present invention provides a display device including: the liquid crystal display device comprises a display panel, a liquid crystal lens and a polarization compensation element. The display panel provides a first incident light. The liquid crystal lens is configured on the display panel. The liquid crystal lens includes: the liquid crystal display device comprises a first substrate, a second substrate, a first liquid crystal layer, a first electrode layer and a second electrode layer which are oppositely arranged. The first liquid crystal layer is arranged 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 configured between the second substrate and the first liquid crystal layer. The polarization compensation element is configured 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 invention, the polarization compensation element includes a third substrate and a fourth substrate disposed opposite to each other, a second liquid crystal layer, a common electrode layer, a scan electrode layer, and an insulating layer. The second liquid crystal layer is configured 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 scanning electrode layer is configured 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 invention, the 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 alternately arranged. The first wide electrodes are respectively overlapped on the first scanning electrodes, and the first narrow electrodes are respectively overlapped on the second scanning electrodes.

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

In an embodiment of the invention, the second electrode layer includes a plurality of second wide electrodes and a plurality of second narrow electrodes alternately arranged. The first wide electrodes are respectively overlapped with the second narrow electrodes, and the first narrow electrodes are respectively overlapped with the second wide electrodes.

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

In an embodiment of the invention, when the polarization compensation element is in an on-state, a horizontal electric field is generated between two adjacent first scan electrodes and second scan electrodes, such that the long axis direction of the liquid crystal molecules in the second liquid crystal layer is shifted along the horizontal electric field.

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

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

In an embodiment of the invention, in the first region, an included angle γ is formed between the polarization direction of the second incident light and the polarization direction of the first incident light, and a value of the included angle γ is approximately equal to twice a value of the included angle α.

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

In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.

Drawings

Fig. 1 is a schematic cross-sectional view illustrating a display device according to an embodiment of the invention.

Fig. 2A is a schematic diagram illustrating a relationship between a polarization direction of first incident light in the first region and a long axis direction of liquid crystal molecules in the second liquid crystal layer according to an embodiment of the invention.

Fig. 2B is a schematic diagram illustrating a relationship between a polarization direction of the first incident light in the second region and a long axis direction of the liquid crystal molecules in the second liquid crystal layer according to an embodiment of the invention.

Fig. 2C is a schematic diagram illustrating a relationship among a polarization direction of the first incident light, a long axis direction of the liquid crystal molecules in the second liquid crystal layer, a polarization direction of the second incident light, and a long axis direction of the liquid crystal molecules in the first liquid crystal layer in the first region and the corresponding third region according to an embodiment of the invention.

Fig. 2D is a schematic diagram illustrating a relationship among a polarization direction of the first incident light, a long axis direction of the liquid crystal molecules in the second liquid crystal layer, a polarization direction of the second incident light, and a long axis direction of the liquid crystal molecules in the first liquid crystal layer in the second region and the corresponding fourth region according to an embodiment of the invention.

Wherein, the reference numbers:

10: display device

100: display panel

150: first incident light

150P: polarization direction of first incident light

200: polarization compensation element

210: third substrate

218: third alignment layer

220: fourth substrate

221: common electrode layer

222: scanning electrode layer

223: insulating layer

224: first scanning electrode

226: second scanning electrode

228: a fourth alignment layer

230: a second liquid crystal layer

232: liquid crystal molecules

232LA1, 232LB1, 332LA2, 332LB 2: long axis direction of liquid crystal molecules

235: horizontal electric field

250: second incident light

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

300: liquid crystal lens

302: lens unit

310: first substrate

312: a first electrode layer

314: first wide electrode

316: first narrow electrode

318: a first alignment layer

320: second substrate

322: a second electrode layer

324: second wide electrode

326: second narrow electrode

328: second alignment layer

330: a first liquid crystal layer

330R: curve line

332: liquid crystal molecules

350: light emission

α, β, γ: included angle

A1: first region

B1: second region

A2: third zone

B2: fourth zone

P1, P2, P3: distance between each other

Detailed Description

The present invention will be described more fully with reference to the accompanying drawings of the present embodiments. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. The thickness of layers and regions in the drawings may be exaggerated for clarity. The same or similar reference numerals denote the same or similar elements, and the following paragraphs will not be repeated.

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

Referring to fig. 1, an embodiment of adisplay device 10 includes: adisplay panel 100, apolarization compensation element 200, and aliquid crystal lens 300. Thedisplay panel 100 may provide thefirst incident light 150 having thepolarization direction 150P. In some embodiments, thedisplay panel 100 may be any component 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 thedisplay panel 100 uses a non-self-luminous material (e.g., a liquid crystal material) as a display medium, it may optionally include a light source module located below thedisplay panel 100 to provide a light source required by thedisplay panel 100.

Theliquid crystal lens 300 is disposed on thedisplay panel 100. Specifically, theliquid crystal lens 300 includes: a first substrate 310, asecond substrate 320, a firstliquid crystal layer 330, afirst electrode layer 312, a first alignment layer 318, asecond electrode layer 322, and asecond alignment layer 328. As shown in fig. 1, the first substrate 310 and thesecond substrate 320 are disposed opposite to each other. In some embodiments, the first substrate 310 and thesecond substrate 320 may be glass substrates or quartz substrates, for example. In other embodiments, the first substrate 310 and thesecond substrate 320 may also be transparent substrates made of other materials, such as polymer materials. The firstliquid crystal layer 330 is disposed between the first substrate 310 and thesecond substrate 320. The firstliquid crystal layer 330 includes a plurality ofliquid crystal molecules 332, wherein theliquid crystal molecules 332 have optical anisotropy in an electric field and are optically isotropic in the absence of the electric field.

Thefirst electrode layer 312 is disposed between the first substrate 310 and the firstliquid crystal layer 330. In detail, thefirst electrode layer 312 includes a plurality of firstwide electrodes 314 and a plurality of firstnarrow electrodes 316. As shown in fig. 1, the width of the firstwide electrodes 314 is larger than that of the firstnarrow electrodes 316 as viewed from the Y direction, and the firstwide electrodes 314 and the firstnarrow electrodes 316 are alternately arranged along the X direction. The two adjacent first wide electrodes 314 (or the two adjacent first narrow electrodes 316) have a pitch P1 therebetween, wherein the pitch P1 can be adjusted according to the actual design requirement. In some embodiments, the firstwide electrode 314 and the firstnarrow electrode 316 may be stripe electrodes extending along the Y direction. The first alignment layer 318 is disposed between thefirst electrode layer 312 and the firstliquid crystal layer 330. The first alignment layer 318 may align theliquid crystal molecules 332 in the firstliquid crystal layer 330.

Thesecond electrode layer 322 is disposed between thesecond substrate 320 and the firstliquid crystal layer 330. In detail, thesecond electrode layer 322 includes a plurality of secondwide electrodes 324 and a plurality of secondnarrow electrodes 326. As shown in fig. 1, the width of the secondwide electrode 324 is greater than the width of the secondnarrow electrode 326 as viewed from the Y direction, in other words, the width of the secondwide electrode 324 extending in the X direction is greater than the width of the secondnarrow electrode 326 extending in the X direction, and the secondwide electrodes 324 and the secondnarrow electrodes 326 are alternately arranged along the X direction. The two adjacent second wide electrodes 324 (or the two adjacent second narrow electrodes 326) have a pitch P2 therebetween, wherein the pitch P2 can be adjusted according to the actual design requirement. In some embodiments, the secondwide electrodes 324 and the secondnarrow electrodes 326 may be stripe electrodes extending along the Y direction. As shown in fig. 1, a third region a2 is defined between the adjacent secondwide electrodes 324 and secondnarrow electrodes 326 to form a plurality of third regions a2 arranged along the X direction, each secondwide electrode 324 and each secondnarrow electrode 326 define a fourth region B2 to form a plurality of fourth regions B2 arranged along the X direction, and the third regions a2 and the fourth regions B2 are alternately arranged along the X direction. Viewed along the Z direction, which is a normal direction perpendicular to the first substrate 310 or thesecond substrate 320, or toward the XY plane, the secondwide electrodes 324 correspond to and overlap the firstnarrow electrodes 316, respectively, and the secondnarrow electrodes 326 correspond to and overlap the firstwide electrodes 314, respectively. That is, the secondwide electrodes 324 are disposed alternately with the firstwide electrodes 314, and the secondnarrow electrodes 326 are disposed alternately with the firstnarrow electrodes 316. In another embodiment, pitch P2 is the same as pitch P1. In alternative embodiments, the material of thefirst electrode layer 312 and thesecond 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-transmissive conductive materials or conductive materials with line widths that are not easily sensed by human eyes. In other embodiments, thefirst electrode layer 312 and thesecond electrode layer 322 may have the same conductive material or different conductive materials.

Thesecond alignment layer 328 is disposed between thesecond electrode layer 322 and the firstliquid crystal layer 330. In some embodiments, the alignment direction of thesecond alignment layer 328 is substantially parallel to the alignment direction of the first alignment layer 318. In some embodiments, the material of the first alignment layer 318 and thesecond alignment layer 328 may be, for example, Polyacetamide (PI), cellulose methyl ether (MC), polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polyamide (polyamide), silicon oxide (SiO), silicon nitride (silicon nitride), silicon carbide (silicon carbide), insulating aluminum oxide (aluminum oxide), or the like. In other embodiments, the first alignment layer 318 and thesecond alignment layer 328 may have the same material or different materials.

In the present embodiment, when thefirst electrode layer 312 and thesecond electrode layer 322 are not driven (or are in an off state), the firstliquid crystal layer 330 is in a homogeneous (homogenous) state as a whole. In this case, the image information provided by thedisplay panel 100 passes through theliquid crystal lens 300, and then substantially provides the light 350 in the original transmission direction to display a two-dimensional image. That is, in the flat display mode, theliquid crystal lens 300 may not be driven.

In addition, when thefirst electrode layer 312 and thesecond electrode layer 322 are driven (or turned on), an electric field is applied to change the state of the firstliquid crystal layer 330 to exhibit a specific refractive index distribution. At this time, the refractive index distribution of the firstliquid crystal layer 330 may provide an effect similar to an optical lens. Therefore, the image information provided by thedisplay panel 100 can be emitted in different directions (i.e. different viewing zones) by theliquid crystal lens 300, so as to provide the light 350 for displaying the stereoscopic image. Accordingly, thedisplay device 10 may have at least two display modes, i.e., a stereoscopic (3D) display mode and a planar (2D) display mode.

As shown in fig. 1, the refractive index profile of the firstliquid crystal layer 330 may, for example, exhibit a trend of acurve 330R, so as to define a plurality oflens units 302 in the firstliquid crystal layer 330. In some embodiments, the refractive index profile in eachlens cell 302 is graded (e.g., progressively larger or progressively smaller) outward from the central region.

Theoretically, the alignment direction (rubbing direction) or the long axis direction of theliquid crystal molecules 332 in the firstliquid crystal layer 330 should be completely consistent with thepolarization direction 150P of thefirst incident light 150, so as to realize an extra-ordinary light (e-light) 3D image. However, in practice, theliquid crystal molecules 332 are affected by the lateral electric field of thefirst electrode layer 312 or thesecond electrode layer 322, so that theliquid crystal molecules 332 deviate from the original alignment direction, and thus a certain amount of 2D image of ordinary light (o light) is formed. Since o-light has no lens effect in theliquid crystal lens 300, it causes light leakage, thereby increasing crosstalk noise in the 3D mode. In order to solve the above problem, in thedisplay device 10 of the present embodiment, thepolarization compensation element 200 is disposed between thedisplay panel 100 and theliquid crystal lens 300 to adjust thepolarization direction 150P of thefirst incident light 150, so as to effectively reduce the light leakage phenomenon and improve the crosstalk noise problem in the 3D mode.

Specifically, thepolarization compensation element 200 includes: athird substrate 210, a fourth substrate 220, a secondliquid crystal layer 230, a common electrode layer 221, ascan electrode layer 222, athird alignment layer 218, afourth alignment layer 228, and an insulating layer 223.

As shown in fig. 1, thethird substrate 210 and the fourth substrate 220 are disposed opposite to each other. In some embodiments, thethird substrate 210 and the fourth substrate 220 may be, for example, glass substrates, quartz substrates, or polymer substrates. The secondliquid crystal layer 230 is disposed between thethird substrate 210 and the fourth substrate 220. The secondliquid crystal layer 230 includes a plurality ofliquid crystal molecules 232, wherein theliquid crystal molecules 232 have optical anisotropy in an electric field and are optically isotropic in the absence of the electric field. Thethird alignment layer 218 is disposed between thethird substrate 210 and the secondliquid crystal layer 230. Thethird alignment layer 218 may align theliquid crystal molecules 232 in the secondliquid crystal layer 230.

The common electrode layer 221 is disposed between the fourth substrate 220 and the secondliquid crystal layer 230. The common electrode layer 221 covers the lower surface of the fourth substrate 220. Thescan electrode layer 222 is disposed between the common electrode layer 221 and the secondliquid crystal layer 230. In some embodiments, thescan electrode layer 222 includes a plurality offirst scan electrodes 224 and a plurality ofsecond scan electrodes 226. As shown in fig. 1, thefirst scan electrodes 224 correspond to and overlap the firstwide electrodes 314, respectively, and thesecond scan electrodes 226 correspond to and overlap the firstnarrow electrodes 316, respectively. Thefirst scan electrodes 224 have the same width as thesecond scan electrodes 226 as viewed in the Y direction, in other words, thefirst scan electrodes 224 extend in the X direction by a width equal to that of thesecond scan electrodes 226 in the X direction and are alternately arranged along the X direction at the same pitch. Two adjacent first scan electrodes 224 (or two adjacent second scan electrodes 226) have a pitch P3 therebetween, wherein the pitch P3 is the same as the pitch P1. As shown in fig. 1, a first region a1 is defined between adjacentfirst scan electrodes 224 andsecond scan electrodes 226 to form a plurality of first regions a1 arranged along the X direction, eachfirst scan electrode 224 and eachsecond scan electrode 226 respectively define a second region B1 to form a plurality of second regions B1 arranged along the X direction, and the first regions a1 and the second regions B1 are alternately arranged along the X direction. In alternative embodiments, the material of the common electrode layer 221 and thescan 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-transmissive conductive materials or conductive materials with line widths that are not easily perceived by human eyes. In other embodiments, the common electrode layer 221 and thescan 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 thescan electrode layer 222 to isolate the common electrode layer 221 from thescan electrode layer 222. In some embodiments, the material of the insulating layer 223 includes an inorganic dielectric material, which may be, for example, silicon oxide, silicon nitride, silicon oxynitride, other suitable dielectric materials, or combinations thereof.

Thefourth alignment layer 228 is disposed between thescan electrode layer 222 and the secondliquid crystal layer 230. In some embodiments, the alignment direction of thefourth alignment layer 228 is substantially parallel to the alignment direction of thethird alignment layer 218. In some embodiments, the material of thethird alignment layer 218 and thefourth alignment layer 228 may be, for example, Polyacetamide (PI), cellulose methyl ether (MC), polymethyl methacrylate (PMMA), polyvinyl alcohol (PVA), polyamide (polyamide), silicon oxide (SiO), silicon nitride (silicon nitride), silicon carbide (silicon carbide), insulating aluminum oxide (aluminum oxide), or the like. In other embodiments, thethird alignment layer 218 and thefourth alignment layer 228 may have the same material or different materials.

In the present embodiment, when thepolarization compensation element 200 is in the on-state, a horizontal electric field 235 is provided between two adjacentfirst scan electrodes 224 andsecond scan electrodes 226, that is, the horizontal electric field 235 is provided in the first area a1, such that the long axis direction 232LA1 of theliquid crystal molecules 232 in the secondliquid crystal layer 230 is shifted along the horizontal electric field 235, in this case, as shown in fig. 1 and fig. 2A, in the first area a1, an included angle α is provided between the long axis direction 232LA1 of theliquid crystal molecules 232 in the secondliquid crystal layer 230 and thepolarization direction 150P of thefirst incident light 150, and the value of the included angle α is not equal to 180 degrees. In addition, as shown in fig. 1 and fig. 2B, in the second region B1, the long axis direction 232LB1 of theliquid crystal molecules 232 in the secondliquid crystal layer 230 is substantially parallel to thepolarization direction 150P of thefirst incident light 150, so the polarization direction of the light passing through the secondliquid crystal layer 230 in the second region B1 is substantially unchanged.

It is noted that, after the first incident light 150 passes through thepolarization compensation element 200, thesecond incident light 250 can be formed to enter theliquid crystal lens 300. In this case, as shown in fig. 1 and fig. 2C, in the first region a1 and the third region a2 overlapped with each other in the Z direction, an included angle β is formed between the polarization direction 250PA of thesecond incident light 250 and the long axis direction 232LA1 of theliquid crystal molecules 232 in the secondliquid crystal layer 230, for example, the included angle β is about equal to the included angle α, which is 90 degrees for example, but not limited thereto. That is, the value of the angle γ between the polarization direction 250PA of thesecond incident light 250 and thepolarization direction 150P of thefirst incident light 150 is approximately equal to twice the value of the angle α. In addition, as shown in fig. 1 and 2D, in the second region B1 and the fourth region B2 overlapped with each other in the Z direction, the long axis direction 232LB1 of theliquid crystal molecules 232 in the secondliquid crystal layer 230, the long axis direction 332LB2 of theliquid crystal molecules 332 in the firstliquid crystal layer 330, and the polarization direction 250PB of thesecond incident light 250 are substantially parallel to each other, so the polarization direction of the light passing through the regions is substantially unchanged.

In some embodiments, the horizontal electric field 235 can be controlled by the voltage applied to thescan electrode layer 222, so as to adjust the included angle α. Therefore, in the present embodiment, thepolarization compensation element 200 can adjust the polarization direction 250PA or 250PB of thesecond incident light 250 entering theliquid crystal lens 300 to be completely consistent or approximately parallel to the alignment direction or the long axis direction 332LA2 or 332LB2 of the correspondingliquid crystal molecules 332 in the firstliquid crystal layer 330, thereby effectively reducing the light leakage phenomenon caused by o light. In an alternative embodiment, thedisplay device 10 of the present embodiment can have a better display brightness because thesecond incident light 250 passing through thepolarization compensation element 200 only changes the polarization direction without being filtered out.

In summary, in an embodiment of the invention, the polarization direction of the first incident light is adjusted to be parallel to the long axis direction of the liquid crystal molecules in the first liquid crystal layer by the polarization compensation element, so that the light leakage phenomenon caused by o light can be effectively reduced, the crosstalk noise problem in the 3D mode can be improved, and the display quality of the 3D image can be improved. In addition, the second incident light passing through the polarization compensation element only changes the polarization direction and is not filtered out, so that the display device of the embodiment can have better display brightness.

Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.

Claims (9)

1. A display device, comprising:

a display panel providing a first incident light;

a liquid crystal lens disposed on the display panel, wherein the liquid crystal lens comprises:

a first substrate and a second substrate disposed opposite to each other;

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 between the second substrate and the first liquid crystal layer; and

a polarization compensation element disposed between the display panel and the LC lens, wherein the polarization compensation element adjusts a polarization direction of the first incident light to be substantially parallel to a long axis direction of the plurality of LC molecules in the first LC layer;

the polarization compensation element includes:

a third substrate and a fourth substrate disposed opposite to each other;

a second liquid crystal layer disposed between the third substrate and the fourth substrate;

a common electrode layer disposed between the fourth substrate and the second liquid crystal layer;

a scanning electrode layer disposed between the common electrode layer and the second liquid crystal layer; and

an insulating layer disposed between the common electrode layer and the scan electrode layer;

the first electrode layer comprises a plurality of first wide electrodes and a plurality of first narrow electrodes which are alternately arranged, the scanning electrode layer comprises a plurality of first scanning electrodes and a plurality of second scanning electrodes which are alternately arranged, the first wide electrodes are respectively overlapped with the first scanning electrodes, and the first narrow electrodes are respectively overlapped with the second scanning electrodes.

2. The display device according to claim 1, wherein a pitch of two adjacent first wide electrodes is the same as a pitch of two adjacent first scan electrodes.

3. The display device according to claim 1, wherein the second electrode layer comprises a plurality of second wide electrodes and a plurality of second narrow electrodes alternately arranged, the first wide electrodes are respectively overlapped with the second narrow electrodes, and the first narrow electrodes are respectively overlapped with the second wide electrodes.

4. The display device according to claim 3, wherein a pitch of two adjacent first wide electrodes is the same as a pitch of two adjacent second wide electrodes.

5. The display device according to claim 1, wherein when the polarization compensation element is in an on state, a horizontal electric field is provided between two adjacent first scan electrodes and second scan electrodes, such that a long axis direction of liquid crystal molecules in the second liquid crystal layer is shifted along the horizontal electric field.

6. The display device according to claim 5, wherein a first region is defined between the first scan electrode and the second scan electrode, and an included angle α is formed between the long axis direction of at least one of the liquid crystal molecules in the second liquid crystal layer and the polarization direction of the first incident light in the first region, and the included angle α is not equal to 180 degrees.

7. The display device according to claim 6, wherein the second electrode layer comprises a plurality of second wide electrodes and a plurality of second narrow electrodes alternately arranged, the first wide electrodes are respectively overlapped with the second narrow electrodes, the first narrow electrodes are respectively overlapped with the second wide electrodes, the first scan electrodes and the second scan electrodes define a plurality of second regions, respectively, a third region is defined between the second wide electrode and the second narrow electrode, the first incident light forms a second incident light after passing through the polarization compensation element to enter the liquid crystal lens in the first region and the third region overlapped with each other in a normal direction, 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 form an included angle beta, and the included angle beta is equal to the included angle alpha.

8. The display device according to claim 7, wherein the long axis direction of at least one of the liquid crystal molecules in the first liquid crystal layer and the polarization direction of the second incident light are substantially parallel in the first region and the third region overlapping each other in the normal direction.

9. The display device according to claim 8, wherein in the first region and the third region overlapping each other in the normal direction, a value of an angle γ between the polarization direction of the second incident light and the polarization direction of the first incident light is equal to a value of twice an angle α.

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