CN109814305B

CN109814305B - Display device

Info

Publication number: CN109814305B
Application number: CN201910252993.4A
Authority: CN
Inventors: 李嘉灵
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2019-03-29
Filing date: 2019-03-29
Publication date: 2021-07-23
Anticipated expiration: 2039-03-29
Also published as: CN109814305A

Abstract

The embodiment of the invention discloses a display device. The display device comprises a display panel and an image moving unit positioned on the light emitting side of the display panel; the display panel comprises a pixel unit array formed by a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels emitting light of different colors; along the row direction, the light-emitting colors of the adjacent sub-pixels are different; along the column direction, the light-emitting colors of the adjacent sub-pixels are the same; the image moving unit does not move an emergent path of light rays emitted by the first pixel unit row, the image moving unit is used for moving the emergent path of the light rays emitted by the sub-pixels in the second pixel unit row by a preset distance along the row direction, so that the adjacent at least three sub-pixels with different colors form the first pixel unit, and at least one sub-pixel and other sub-pixels in the first pixel unit are positioned in different rows and can emit white light; the first pixel unit rows and the second pixel unit rows are alternately arranged along the column direction. The technical scheme of the embodiment of the invention can effectively improve the resolution of the display device.

Description

Display device

Technical Field

The embodiment of the invention relates to a display technology, in particular to a display device.

Background

As is known, the higher the resolution of the display panel is, the clearer the imaging of the display panel is, and the better the display experience can be brought to people. With the development of display technology and the increasing demand of people for consumer electronics products, the demand of high-resolution display panels is increasing. In the prior art, an Organic Light-Emitting Diode (OLED) display device has many advantages of active Light emission, wide color gamut, fast response, high contrast, low power consumption, small volume, easy implementation of flexible display, and the like, and has a very wide application prospect.

In the prior art, Sub Pixel Rendering (SPR) is a technology for improving display resolution by reasonably arranging Sub pixels and combining with a corresponding algorithm. Fig. 1 is a schematic diagram of a conventional Δ RGB pixel arrangement that can be used in SPR, where the light emission colors of adjacent sub-pixels are different, and therefore, in order to prevent color crosstalk between sub-pixels during display, high alignment accuracy is required in forming a pixel, and the requirement for a manufacturing process is high. For example, for an OLED display panel, an evaporation process is generally adopted, and is limited by the precision of a high-precision Metal Mask (FMM) during evaporation, so that the resolution of the display panel is difficult to further improve.

Disclosure of Invention

The embodiment of the invention provides a display device, which is used for improving the resolution of the display device.

The embodiment of the invention provides a display device, which comprises a display panel and an image moving unit positioned on the light emergent side of the display panel;

the display panel comprises a pixel unit array formed by a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels emitting light of different colors;

the light emitting colors of the adjacent sub-pixels are different along the row direction; the light emitting colors of the adjacent sub-pixels are the same along the column direction;

the image moving unit does not move an emergent path of light rays emitted by a first pixel unit row, the image moving unit is used for moving the emergent path of the light rays emitted by the sub-pixels in a second pixel unit row by a preset distance along the row direction, so that the adjacent at least three sub-pixels with different colors form a first pixel unit, at least one sub-pixel and other sub-pixels in the first pixel unit are positioned in different rows, and the first pixel unit can emit white light;

the first pixel unit rows and the second pixel unit rows are alternately arranged along the column direction;

the first pixel unit row is located in an odd-numbered row, and the second pixel unit row is located in an even-numbered row, or the second pixel unit row is located in an odd-numbered row, and the first pixel unit row is located in an even-numbered row.

The display device provided by the embodiment of the invention comprises a display panel and an image moving unit positioned on the light emergent side of the display panel; the display panel comprises a pixel unit array formed by a plurality of pixel units, wherein each pixel unit comprises a plurality of sub-pixels emitting light of different colors; along the row direction, the light-emitting colors of the adjacent sub-pixels are different; along the column direction, the light-emitting colors of the adjacent sub-pixels are the same; the image moving unit does not move an emergent path of light rays emitted by the first pixel unit row, the image moving unit is used for moving the emergent path of the light rays emitted by the sub-pixels in the second pixel unit row by a preset distance along the row direction, so that the adjacent at least three sub-pixels with different colors form the first pixel unit, at least one sub-pixel and other sub-pixels in the first pixel unit are positioned in different rows, and the first pixel unit can emit white light; the first pixel unit rows and the second pixel unit rows are alternately arranged along the column direction; the first pixel unit row is located in the odd-numbered row and the second pixel unit row is located in the even-numbered row, or the second pixel unit row is located in the odd-numbered row and the first pixel unit row is located in the even-numbered row. The adjacent sub-pixels in the column direction of the display panel are designed to emit light with the same color, so that the alignment precision of the sub-pixels in the column direction can be reduced, the sub-pixels in the column direction are arranged more tightly, the density of the sub-pixels on the display panel is increased, and the resolution of the display panel is improved; the exit path of the light rays emitted by the sub-pixels in the second pixel unit row is moved by a preset distance along the row direction through the image moving unit, while the exit path of the light rays emitted by the sub-pixels in the first pixel unit row is not moved, so that at least three sub-pixels emitting light of different colors in two adjacent rows can form a first pixel unit, the first pixel unit can emit white light, and the display resolution can be further improved by combining an SPR algorithm.

Drawings

FIG. 1 is a schematic diagram of a conventional Δ RGB pixel arrangement that can be used for SPR;

fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;

fig. 3 is a schematic diagram of a pixel arrangement of a display panel according to an embodiment of the invention;

FIG. 4 is a schematic diagram of the pixel arrangement shown in FIG. 3 after image shifting;

FIG. 5 is a schematic diagram of a pixel arrangement of another display panel according to an embodiment of the invention;

FIG. 6 is a schematic diagram of the pixel arrangement shown in FIG. 5 after image shifting;

FIG. 7 is a schematic diagram illustrating a pixel arrangement of another display panel according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of the pixel arrangement shown in FIG. 7 after image shifting;

fig. 9 is a schematic structural diagram of another display device according to an embodiment of the invention;

fig. 10 is a schematic structural diagram of another display device according to an embodiment of the invention;

fig. 11 is a schematic structural diagram of another display device according to an embodiment of the invention;

fig. 12 is a schematic structural diagram of another display device according to an embodiment of the invention;

fig. 13 is a schematic structural diagram of a light valve according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of another display device according to an embodiment of the invention;

FIG. 15 is a schematic diagram of light propagation in a birefringent structure.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention. Referring to fig. 2, the display device according to the embodiment of the present invention includes a display panel 10 and an image moving unit 20 located on a light emitting side of the display panel 10; the display panel 10 includes a pixel unit array formed of a plurality of pixel units. Referring to fig. 3, fig. 3 is a schematic diagram illustrating a pixel arrangement of a display panel according to an embodiment of the invention. Each pixel unit includes a plurality of sub-pixels emitting light of different colors, and three sub-pixels R, G, B emitting light of three colors, red, green, and blue, respectively, are schematically shown in fig. 3; along the row direction x, the light-emitting colors of the adjacent sub-pixels are different; along the column direction y, the light-emitting colors of the adjacent sub-pixels are the same; the image shift unit does not move the exit path of the light emitted from the first pixel unit row 110, and is configured to shift the exit path of the light emitted from the sub-pixels in the second pixel unit row 120 by a preset distance along the row direction x, so that the adjacent at least three sub-pixels with different colors form a first pixel unit, at least one sub-pixel and other sub-pixels in the first pixel unit are located in different rows, and the first pixel unit can emit white light; the first pixel unit rows 110 and the second pixel unit rows 120 are alternately arranged in the column direction y; the first pixel cell row 110 is located in an odd-numbered row and the second pixel cell row 120 is located in an even-numbered row, or the second pixel cell row 120 is located in an odd-numbered row and the first pixel cell row 110 is located in an even-numbered row.

It is understood that the display panel 10 may be a display panel such as a liquid crystal display panel or an organic light emitting display panel, and the present embodiment is described below by taking the organic light emitting display panel as an example. The display panel comprises a pixel unit array, a display unit array and a display unit array, wherein the adjacent sub-pixels in the row direction x have different light-emitting colors, and the adjacent sub-pixels in the column direction y have the same light-emitting color, and the pixel unit array is used for displaying a picture to be displayed; the image shifting unit 20 is configured to modulate the light emitting paths of some sub-pixels in the display panel 10, and move the light emitting paths of the sub-pixels in half of the pixel unit rows (odd rows or even rows) by a predetermined distance without changing the light emitting paths of the other half of the pixel unit rows. Illustratively, fig. 4 is a schematic diagram of the pixel arrangement shown in fig. 3 after the pixel arrangement is shifted. Referring to fig. 3 and 4, the display panel includes three sub-pixels R, G, B emitting three colors of red, green, and blue, respectively; in the row direction x, the light-emitting colors of the adjacent sub-pixels are different, and in the column direction y, the light-emitting colors of the adjacent sub-pixels are the same; for example, the following describes exemplary embodiments of the present invention with an odd-numbered row as the first pixel unit row 110 and an even-numbered row as the second pixel unit row 120. Referring to fig. 4, the image shifting unit does not move the display positions of the sub-pixels in the first pixel row 110, and the image shifting unit moves the emergent path of the emergent light of the sub-pixels in the second pixel row 120 along the row direction x by a predetermined distance to the position shown in fig. 4. It should be noted that the image shift unit utilizes optical principles, and changes the light emitting path of the sub-pixel, thereby changing the display position of the sub-pixel on the display panel. Three R, G, B sub-pixels in two adjacent rows form a first pixel unit 100, and the first pixel unit 100 can emit white light; in the picture displayed by the display panel after image shifting, the luminous colors of the adjacent sub-pixels in the column direction are different. Because the display panel in the embodiment of the invention designs the adjacent sub-pixels with the same color in the column direction, the alignment precision of the sub-pixels in the column direction is reduced, more sub-pixels can be designed on the display panel with the same size, and the pixel density (PPI) of the display panel is improved; after the image moving unit performs image moving, a pixel arrangement mode that adjacent sub-pixels in the column direction have different light-emitting colors is formed, which is beneficial to displaying colors; furthermore, the resolution of the display panel can be further improved by combining the existing SPR algorithm.

It should be noted that the division of the first pixel unit 100 in fig. 4 is only schematic, and the pixel rendering method in the specific display may be set according to the actual situation, which is not limited by the present invention.

According to the technical scheme of the embodiment of the invention, the adjacent sub-pixels in the column direction of the display panel are designed to emit light with the same color, so that the alignment precision of the sub-pixels in the column direction can be reduced, the sub-pixels in the column direction are arranged more tightly, the density of the sub-pixels on the display panel is increased, and the resolution of the display panel is improved; the exit path of the light rays emitted by the sub-pixels in the second pixel unit row is moved by a preset distance along the row direction through the image moving unit, while the exit path of the light rays emitted by the sub-pixels in the first pixel unit row is not moved, so that at least three sub-pixels emitting light of different colors in two adjacent rows can form a first pixel unit, the first pixel unit can emit white light, and the display resolution can be further improved by combining an SPR algorithm. In addition, when the display device displays, one screen does not need to be divided into multiple frames to be synthesized so as to improve the display resolution, and the refresh rate of the display panel does not need to be increased.

Optionally, the preset distance is half of the width of one pixel unit in the row direction; the width of one pixel unit is the distance between the centers of two sub-pixels emitting the same color light in two adjacent pixel units along the row direction.

With continued reference to fig. 4, defining a width w of one pixel unit as a distance between centers of sub-pixels of the same color in two adjacent pixel units in the row direction x, for example, the distance between two R sub-pixels in fig. 4 is w, shifting 1/2w the light emitting paths of the sub-pixels in the second pixel row 120 along the row direction x, so as to form a pixel arrangement in which the colors of the adjacent sub-pixels are different along the column direction, and in addition, in a picture displayed by the display panel after the image shift, positions of three sub-pixels of different adjacent colors may correspond to positions of three vertices of a triangle, so as to facilitate color display of the display device; furthermore, the display resolution is improved by utilizing an SPR algorithm.

Optionally, each pixel unit includes three sub-pixels emitting light of different colors or four sub-pixels emitting light of different colors.

It can be understood that fig. 3 is a pixel arrangement manner in which each pixel unit includes three sub-pixels emitting light of different colors, for example, fig. 5 is a schematic pixel arrangement diagram of another display panel according to an embodiment of the present invention, and fig. 6 is a schematic pixel arrangement diagram after image shifting of the pixel arrangement shown in fig. 5. Referring to fig. 5, unlike fig. 3, each pixel unit in fig. 5 includes two green (G) sub-pixels, and the first pixel unit 100 after image shifting is shown as a triangle dashed line box in fig. 6. Referring to fig. 5, since the pixels are arranged in the column direction y and are designed to be adjacent to the sub-pixels, the alignment precision of the sub-pixels in the column direction y is reduced, and therefore more sub-pixels can be designed on the display panel with the same size, thereby improving the PPI of the display panel; referring to fig. 6, after image shifting, the image shifting unit forms pixel arrangement modes with different colors of adjacent sub-pixels in the row direction y, which is beneficial to color display of the display device; furthermore, the R, G, B sub-pixels of two adjacent rows can be shared to form a virtual pixel by combining with a pixel rendering algorithm, so that the display resolution is effectively improved.

For example, fig. 7 is a schematic diagram of a pixel arrangement of another display panel according to an embodiment of the present invention, and fig. 8 is a schematic diagram of a pixel arrangement after image shifting of the pixel arrangement shown in fig. 7. Referring to fig. 7 and 8, one pixel unit may include four sub-pixels, for example, four sub-pixels of red (R), green (G), blue (B), and white (W), or four sub-pixels of red (R), green (G), blue (B), and yellow (Y), and the pixel arrangement after image shifting is as shown in fig. 8. Fig. 7 and 8 are schematically illustrated by taking as an example only the case of four sub-pixels of red (R), green (G), blue (B), and white (W).

Along the row direction x, the sub-pixel row comprises four sub-pixels of red (R), green (G), blue (B) and white (W), and the colors of the adjacent sub-pixels are different; along the column direction y, adjacent sub-pixels are the same color. After the pixel arrangement is shifted, referring to fig. 8, four sub-pixels of red (R), green (G), blue (B) and white (W) in two adjacent rows form a first pixel unit 100, and the first pixel unit 100 can emit white light.

It can be understood that the display brightness of the display panel can be effectively improved by adding the white (W) or yellow (Y) sub-pixels, the arrangement of the pixels with different colors adjacent to the sub-pixels along the column direction Y is formed after the image shift of the image shift unit, and compared with the pixel unit formed by four sub-pixels with different colors sequentially arranged along the same direction before the image shift, the pixel unit formed by four sub-pixels with different colors adjacent to each other can be formed, which is beneficial to the display of the display color; furthermore, the R, G, B, W (or Y) sub-pixels of two adjacent rows can be shared to form a virtual pixel by combining with a pixel rendering algorithm, so that the display resolution is effectively improved.

Shown in FIG. 9The invention provides a schematic structural diagram of another display device. Referring to fig. 9, optionally, the display panel 10 is a liquid crystal display panel, and the emergent light of the liquid crystal display panel is first polarized light with a first polarization direction; the image shifting unit 20 comprises a birefringent structure 21, which is positioned at the light-emitting side of the liquid crystal display panel; the optical axis direction of the birefringent structure 21 corresponding to the first pixel cell row is a first direction a; the optical axis direction of the birefringent structure 21 corresponding to the second pixel cell row is the second direction b; the first direction a is perpendicular to the first polarization direction, and the second direction b has a first angle with the first polarization direction

Wherein the content of the first and second substances,

it is understood that birefringence refers to the phenomenon where one incident ray produces two refracted rays. Light rays are incident on anisotropic crystals (such as quartz, calcite, and the like) and are decomposed into two polarized lights with vibration directions perpendicular to each other and different propagation speeds, wherein light beams satisfying the law of refraction are called ordinary rays, and light beams not satisfying the law of refraction are called extraordinary rays. For example, since the light emitted from the liquid crystal display panel is polarized light, the polarization direction of the light emitted from the display panel 10 shown in fig. 9 may be set to be a first polarization direction, the first polarization direction is parallel to the plane where the display panel 10 is located and perpendicular to the light propagation direction, the light emitted from the display panel is perpendicularly incident on the birefringent structure 21, when the light emitted from the display panel is transmitted in the birefringent structure 21, the optical axis direction of the birefringent structure corresponding to the first pixel unit row 110 is a first direction a, and since the first direction a is perpendicular to the first polarization direction, the light emitted from the birefringent structure 21 does not change the exit path, that is, the sub-pixel display position of the first pixel row 100 does not change. The optical axis direction of the birefringent structure corresponding to the second pixel unit row 120 is the second direction b, because the second direction b has the first included angle with the first polarization direction

And is

The light emitted from the second pixel unit row 120 may shift after passing through the birefringent structure, and in specific implementation, the direction of the optical axis and the thickness of the birefringent structure are reasonably designed, so that the emergent light ray is shifted by a preset distance along the row direction.

It should be noted that the light rays shown in fig. 9 are deflected downward in the diagram only to illustrate that the exit paths of the light rays exiting from the second pixel unit row are shifted, and the actual shift direction thereof may be set correspondingly according to the shift direction of the sub-pixel row, for example, in this embodiment, the shift direction of the light rays exiting from the sub-pixels of the second pixel row 120 after passing through the image shifting unit 20 is the row direction.

Fig. 10 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 10, optionally, the image shifting unit 20 includes a light valve 22, and the light valve 22 only allows the first polarization light with the first polarization direction to pass through; a birefringent structure 21 located on the light exit side of the light valve 22; the optical axis direction of the birefringent structure 21 corresponding to the first pixel cell row 110 is a first direction a; the optical axis direction of the birefringent structure 21 corresponding to the second pixel unit row 120 is the second direction b; the first direction a is perpendicular to the first polarization direction, and the second direction has a second included angle with the first polarization direction

Wherein the content of the first and second substances,

it is understood that in the display device shown in fig. 10, the light exiting from the display panel may have any polarization direction, and may include one or more polarization directions. FIG. 10 schematically illustrates a display panel with two polarization directions perpendicular to each other for outgoing light; the light valve 22 allows only light of a first polarization to pass through, and does not allow light of other polarizations to pass through. For example, the first polarization direction may be set to be parallel to the display panel and perpendicular to the light propagation direction; the light propagation direction is perpendicular to the image shift unit 20.

Alternatively, the light valve 22 may be a twisted nematic liquid crystal cell and a polarizer structure, the polarizer being located between the display panel 10 and the twisted nematic liquid crystal cell, the polarizer being arranged to allow only polarized light perpendicular to the first polarization direction to pass through, the twisted nematic liquid crystal cell rotating the polarization direction of light incident on the birefringent structure 21 to the first polarization direction. Since the optical axis direction of the birefringent structure corresponding to the first pixel unit row 110 is perpendicular to the first polarization direction, the light does not change the exit path when exiting from the birefringent structure 21; the second direction b of the birefringent structure 21 corresponding to the second pixel unit row 120 has a second angle with the first polarization direction

Then, the light exit path in the birefringent structure 21 is shifted, and in specific implementation, the direction of the optical axis and the thickness of the birefringent structure are reasonably designed, so that the exiting light is shifted by a preset distance along the row direction. It is understood that the light emitted from the display panel 10 may only include one polarization direction, please refer to fig. 11 as a schematic structural diagram of another display device according to an embodiment of the present invention, that is, the display panel 10 is a liquid crystal display panel. At this time, the linearly polarized light emitted from the display panel 10 passes through the light valve 22, and the light modulated to the first polarization direction is incident on the birefringent structure 21.

Optionally, with continued reference to fig. 10, when the emergent light of the display panel includes a plurality of polarization directions, for example, the display panel is an OLED display panel, and the light valve 22 may be a linear polarizer. At this time, the light valve 22 only allows the polarized light with the first polarization direction to pass through, the light ray is perpendicularly incident on the birefringent structure 21, and since the optical axis direction of the birefringent structure corresponding to the first pixel unit row 110 is perpendicular to the first polarization direction, the light ray does not change the exit path when exiting from the birefringent structure 21; the second direction b of the birefringent structure 21 corresponding to the second pixel unit row 120 has a second angle with the first polarization direction

Then, the light exit path in the birefringent structure 21 is shifted, and in specific implementation, the direction of the optical axis and the thickness of the birefringent structure are reasonably designed, so that the exiting light is shifted by a preset distance along the row direction.

Optionally, the birefringent structure comprises an electrically or magnetically controlled birefringent material.

It can be understood that the electrically controlled birefringent material or the magnetically controlled birefringent material, such as liquid crystal, can change the molecular arrangement direction thereof by changing the electric field or the magnetic field, thereby achieving the purpose of controlling the optical axis direction by regions.

Fig. 12 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 12, optionally, the image shift unit 20 includes a light valve 22 and a birefringent structure 21, the light valve 22 includes a first light valve 22a and a second light valve 22 b; the first light valve 22a modulates the outgoing light of the first pixel unit row into second polarized light with a second polarization direction, and the second light valve 22b modulates the outgoing light of the second pixel unit row into first polarized light with a first polarization direction; a birefringent structure 21 located on a side of the light valve away from the display panel 10, an optical axis of the birefringent structure 21 being perpendicular to the second polarization direction and having a third angle with the first polarization direction

Wherein the content of the first and second substances,

illustratively, in the birefringent structure 21 of FIG. 12, the optical axes have the same direction. The birefringent structure 21 can be manufactured at one time, and the manufacturing process is simplified. At this time, the light emitted from the first pixel unit row 110 passes through the second light valve 22a to obtain the second polarized light with the second polarization direction, and since the second polarization direction is perpendicular to the direction of the optical axis and the incident direction of the second polarized light is perpendicular to the birefringent structure, the second polarized light will not shift when passing through the birefringent structure 21; the light of the second pixel unit row 120 passes through the second light valve 22bObtaining the first polarized light with the first polarization direction, because the first polarization direction has an included angle with the optical axis

And is

The incident direction of the first polarized light is perpendicular to the double refraction structure, and after passing through the double refraction structure, the emergent path can deviate, and the emergent light rays can be translated for a preset distance along the row direction by reasonably designing the direction of the optical axis and the thickness of the double refraction structure.

Fig. 13 is a schematic structural diagram of a light valve according to an embodiment of the present invention. Referring to fig. 13, alternatively, the light valve includes a twisted nematic liquid crystal cell 221 and a polarizer 222; a twisted nematic liquid crystal cell comprising: a first substrate 2211, a second substrate 2212, a twisted nematic liquid crystal layer 2213 between the first substrate 2211 and the second substrate 2212; a first electrode 2214 on one side of the first substrate 2211; a second electrode 2215 on the second substrate 2214 side; a polarizer 222 is located on the side of the twisted nematic liquid crystal cell 221 away from the birefringent structure.

It is understood that twisted nematic liquid crystal molecules may twist with and without voltage applied across the liquid crystal, thereby modulating the polarization direction of light. In a specific implementation, for example, for the embodiment corresponding to fig. 11, the same voltage may be applied to the entire display area through the first electrode 2214 and the second electrode 2215, so that the polarization state of the light emitted from the display panel 10 is deflected to the first polarization direction; for the embodiment corresponding to fig. 12, the first light valve and the second light valve may be formed by applying different electric fields to the first electrode 2214 and the second electrode 2215 at the corresponding areas of the first pixel unit row and the second pixel unit row, respectively, so as to transmit the first polarized light and the second polarized light, respectively. It is to be understood that the light valve may not include a polarizer when the display panel is a liquid crystal display panel.

Alternatively, with continued reference to fig. 12, the display panel 10 may be an organic light emitting display panel, and the light valve 22 includes a polarizing wire grid including first structures and second structures alternately arranged in a column direction, the first structures forming the first light valve 22a, and the second structures forming the second light valve 22 b; the first structure transmits light of the second polarization and the second structure transmits light of the first polarization.

Fig. 14 is a schematic structural diagram of another display device according to an embodiment of the present invention. Referring to fig. 14, optionally, the display device further comprises a brightness enhancement film 30, the brightness enhancement film 30 being located between the display panel 10 and the light valve 22.

It is understood that since half of the light is filtered by the light valve, the display brightness is halved, and therefore, a brightness enhancement film can be disposed between the display panel and the light valve, thereby improving the display brightness.

FIG. 15 is a schematic diagram of light propagation in a birefringent structure. Referring to fig. 15, optionally, the preset distance L for the image shift unit to move the outgoing path of the outgoing light of the sub-pixel in the row of the second pixel unit along the row direction satisfies:

L＝d·tanθ；

wherein d represents the thickness of the birefringent structure in the direction perpendicular to the plane of the display panel, and theta represents the angle between the extraordinary ray and the ordinary ray when the birefringent structure is birefringent,

representing the angle of the optical axis with respect to the direction perpendicular to the display panel, n_oRepresenting the refractive index of ordinary rays in a birefringent structure, n_eRepresenting the refractive index of the very light in the birefringent structure.

Through the reasonable design of the direction of the optical axis of the double refraction structure and the thickness of the double refraction structure, the emergent ray can translate for a preset distance along the row direction.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements, combinations and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The display device is characterized by comprising a display panel and an image moving unit positioned on the light emergent side of the display panel;

2. A display device as claimed in claim 1, wherein the predetermined distance is half the width of a pixel cell in the row direction;

the width of the pixel unit is the distance between the centers of two sub-pixels emitting the same color light in two adjacent pixel units along the row direction.

3. The display device according to claim 1, wherein each of the pixel units comprises three sub-pixels emitting different colors or four sub-pixels emitting different colors.

4. The display device according to claim 1, wherein the display panel is a liquid crystal display panel, and the outgoing light of the liquid crystal display panel is first polarized light with a first polarization direction;

the image moving unit includes: the birefringent structure is positioned on the light-emitting side of the liquid crystal display panel;

the optical axis direction of the birefringent structure corresponding to the first pixel unit row is a first direction; the optical axis direction of the birefringent structure corresponding to the second pixel unit row is a second direction; the first direction is perpendicular to the first polarization direction, and the second direction has a first included angle with the first polarization direction

Wherein the content of the first and second substances,

5. the display device according to claim 1, wherein the image shift unit includes: a light valve that allows only light of a first polarization direction to pass therethrough;

the birefringent structure is positioned on the light outlet side of the light valve;

the optical axis direction of the birefringent structure corresponding to the first pixel unit row is a first direction; the optical axis direction of the birefringent structure corresponding to the second pixel unit row is a second direction; the first direction is perpendicular to the first polarization direction, and the second direction has a second included angle with the first polarization direction

Wherein the content of the first and second substances,

6. a display device as claimed in claim 4 or 5, characterised in that the birefringent structure comprises an electrically or magnetically controlled birefringent material.

7. The display device according to claim 1, wherein the image shift unit includes a light valve and a birefringent structure, the light valve including a first light valve and a second light valve alternately arranged in a column direction;

the first light valve modulates the emergent light of the first pixel unit row into second polarized light in a second polarization direction, and the second light valve modulates the emergent light of the second pixel unit row into first polarized light in a first polarization direction;

the birefringent structure is located on one side of the light valve far away from the display panel, and the optical axis of the birefringent structure is perpendicular to the second polarization direction and has a third included angle with the first polarization direction

Wherein the content of the first and second substances,

8. the display device according to claim 5 or 7, wherein the light valve comprises a twisted nematic liquid crystal cell and a polarizer;

the twisted nematic liquid crystal cell includes:

the liquid crystal display panel comprises a first substrate, a second substrate and a twisted nematic liquid crystal layer positioned between the first substrate and the second substrate;

a first electrode positioned at one side of the first substrate;

the second electrode is positioned on one side of the second substrate;

the polarizer is positioned on the side of the twisted nematic liquid crystal cell away from the birefringent structure.

9. The display device according to claim 7, wherein the display panel is an organic light emitting display panel, and the light valve comprises a polarizing wire grid including a first structure and a second structure alternately arranged in a column direction, the first structure forming the first light valve, the second structure forming the second light valve;

the first structure transmits the second polarized light and the second structure transmits the first polarized light.

10. The display device according to claim 7 or 9, further comprising a brightness enhancement film positioned between the display panel and the light valve.