WO2013174123A1

WO2013174123A1 - Phase retarder and fabrication method therefor, polarization phase retarder and display device

Info

Publication number: WO2013174123A1
Application number: PCT/CN2012/086221
Authority: WO
Inventors: 马小叶; 胡明
Original assignee: 京东方科技集团股份有限公司; 合肥京东方光电科技有限公司
Priority date: 2012-05-21
Filing date: 2012-12-07
Publication date: 2013-11-28
Also published as: CN102707362B; CN102707362A

Abstract

A phase retarder and a fabrication method therefor, a polarization phase retarder and a display device, which belong to the technical field of three-dimensional display, and can solve the problems of limited viewing angle, complex structure, high cost and large brightness loss in the existing three-dimensional display technology. The phase retarder comprises: a first substrate (1) and a second substrate (2), wherein at the inner side of the first substrate (1) are arranged light-transmittable strips (81) parallel to and spaced apart from one another; an alignment layer (5) that is aligned along a first direction (7) and formed on both the first substrate (1) and the second substrate (2); and a liquid crystal material (6) is filled between the first substrate (1) and the second substrate (2). The polarization phase retarder comprises a phase retarder and a linear polaroid. A three-dimensional display device comprises a phase retarder.

Description

Phase retarder and preparation method thereof, polarization phase retarder, display device

Embodiments of the present invention relate to a phase retarder, a method of fabricating the same, a polarization phase retarder, and a display device. Background technique

The three-dimensional display (3D display) technology is a technology that uses a flat display panel to present a "stereoscopic" image. The basic principle is to allow the user to see different images with both eyes, giving a three-dimensional feeling.

Shutter glass technology is one of the methods to realize three-dimensional display. In the shutter glasses technology, the display panel alternately displays images for left-eye and right-eye viewing (such as switching once per frame), while the left and right lenses of the shutter-eye mirror are also switched between on/off states (one on-time) The other is turned off) so that the user's eyes can alternately see the respective images, thereby achieving a three-dimensional display effect. However, the shutter glasses technology needs to quickly switch the lens between on/off states, so it must be realized by a specific circuit, which results in a complicated structure, large weight, high cost, high energy consumption, electromagnetic radiation pollution, and easy generation. The defect of the fault.

As shown in FIG. 1, another type of three-dimensional display technology divides the display panel 9 into two display areas 91, 92 for displaying a first image and a second image, respectively; each of the display areas 91, 92 is composed of a plurality of The strip regions are parallel and spaced apart, each strip region is one or several pixels wide (each pixel can correspond to three sub-pixels), and the strip regions of the two display regions 91, 92 are alternately arranged. Thus, the three-dimensional display effect can be realized as long as the user's eyes see the first image and the second image, respectively. Here, both the actual first image and the second image are composed of a plurality of spaced image strips, but because of the small spacing, the human eye processes them into a continuous image.

It should be understood that the display area described above is only divided according to the image displayed by different positions of the display panel, and it does not mean that the display panel is structurally divided into two areas, as long as the existing driving mode is adjusted, any existing conventional display. The panel can display the effects of the first image and the second image at different positions. For example, two display areas may be displayed in turn (for example, scanning the gate lines of odd and even lines in turn), or the first image and the second image may be interspersed into a "mixed" image. display. In order to make the user's eyes see the first image and the second image respectively, one method is to respectively set a line polarizer whose transmission directions are perpendicular to each other in front of the two display areas, so that the light emitted by the two display areas is transmitted through. After different polarizers, the linearly polarized light whose polarization directions are perpendicular to each other is combined with the corresponding linear polarized glasses (the two lenses are linear polarizers whose transmission directions are perpendicular to each other), and one of the linearly polarized lights can be "filtered" off. Thereby, the eyes of the different display areas are respectively seen by the eyes, and the three-dimensional display is realized. However, from the nature of linearly polarized light, it can be known that the polarization direction of the linear polarizer must be completely filtered out when it is perpendicular to the polarization direction of the polarized light. Therefore, when using the linearly polarized light three-dimensional display technology, it must be viewed at a specific angle. In order to achieve a three-dimensional effect, the viewing comfort is greatly reduced.

In order to solve the problem that the viewing angle of the linearly polarized light three-dimensional display technology is limited, a quarter (or three-quarters) wave plate may be disposed after the above-mentioned line polarizer, so as to be respectively emitted by the two display areas. Linearly polarized light whose polarization directions are perpendicular to each other is converted into left-handed and right-handed circularly polarized light. In this way, as long as the corresponding circular polarized glasses (the two lenses are a left-handed circular polarizer and a right-handed circular polarizer) are combined, the three-dimensional display effect can be achieved, and the viewing angle is relatively free, and the viewing experience is good. However, the above-mentioned circularly polarized light three-dimensional display technology requires multiple filtering, the structure of the device is complicated, the cost is high, and the light brightness loss is severe. Summary of the invention

The embodiments of the present invention provide a phase retarder with flexible viewing angle, simple structure, low cost, and low brightness loss, in view of the problems of limited viewing angle, complicated structure, high cost, and large brightness loss of the existing three-dimensional display technology. The preparation method thereof, the polarization phase retarder and the display device.

An aspect of the invention provides a phase retarder comprising: a first substrate and a second substrate; wherein: a light transmissive strip arranged parallel to each other and spaced apart is disposed inside the first substrate; An alignment layer that is aligned along the first direction is formed on the substrate and the second substrate, the first direction is parallel to the first substrate; and the liquid crystal material is filled between the first substrate and the second substrate.

In the phase retarder of the embodiment of the present invention, since the light-transmitting strip is disposed on the first substrate, the thickness of the liquid crystal layer is different at the position where the light-transmitting strip and the light-transmitting strip are not provided, and the two substrates are respectively provided with The alignment layer that is aligned in the first direction, when linearly polarized light is incident on the phase retarder, is converted into circularly polarized light or elliptically polarized light having different rotational directions at different positions, thereby being used for realizing a three-dimensional display effect.

Since the phase retarder of the embodiment of the invention is composed of a substrate, a light-transmitting strip and a liquid crystal layer, no power is required, the energy consumption is low, the structure is simple, and the cost is low; and, since it generates circularly polarized light, Therefore, the viewing angle is flexible; at the same time, since the thickness of the liquid crystal layer at different positions is different, it can directly convert linearly polarized light having the same polarization direction (ie, light emitted from a conventional liquid crystal display panel) into left-handed and right-handed circularly polarized light. It is not necessary to first generate linearly polarized light having different polarization directions, so that the number of filtering times is small and the luminance loss is small.

For the phase retarder, for example, the distance between the first substrate and the second substrate is such that the thickness of the light-transmitting strip is h; di and h satisfy the following relationship:

Here, λ is the wavelength of light transmitted through the phase retarder, Δη is the birefringence of the liquid crystal material, and is a positive integer, and k _h is a positive odd number of less than or equal to.

In the phase retarder of the embodiment of the present invention, (^ and 11 satisfy the above relationship, so when linearly polarized light having a polarization direction at a 45-degree angle with the first direction is incident on the phase retarder, it is converted into left-handed and right-handed, respectively. The circularly polarized light is rotated to achieve the best three-dimensional display.

For the phase retarder, for example, λ = 550 ηιη.

For the phase retarder, for example, it is preferable that the Δη = 0.12,

, d corpse 5.7μπι, 1ι=2.3μπι.

For the phase retarder, for example, the liquid crystal material is a nematic liquid crystal material.

For the phase retarder, for example, the light-transmitting strip is composed of a light-transmissive resin material.

Another aspect of the present invention provides a method of fabricating the above phase retarder, comprising: forming the light-transmissive strip on the first substrate by a patterning process.

In the method for preparing the phase retarder according to the embodiment of the present invention, the transparent strip can be directly formed by a conventional patterning process to control the thickness of the liquid crystal layer at different positions, so that the preparation method is simple and reliable, the yield is high, and the formed bit is formed. The retarder has a flexible viewing angle, a simple structure, low cost, and low brightness loss.

According to still another aspect of the present invention, a liquid crystal three-dimensional display device includes: a liquid crystal display panel; the phase retarder disposed in front of the liquid crystal display panel, and the light transmissive strip and the liquid crystal display panel are used for displaying The position of an image is opposite, the gap between the light-transmissive strips is opposite to the position on the liquid crystal display panel for displaying the second image, and the polarization direction of the linearly polarized light emitted by the liquid crystal display panel is sandwiched between the first direction The angle is 45 degrees.

Since the liquid crystal three-dimensional display device according to the embodiment of the present invention has the above-described phase retarder, the viewing angle is flexible, the structure is simple, the cost is low, and the luminance loss is small. Meanwhile, since the hardware structure of the display panel in the liquid crystal three-dimensional display device and the liquid crystal display panel for two-dimensional (2D) display have no area Don't (the display area can be divided by controlling the driving method), so as long as the phase retarder is removed, it can be used as a conventional two-dimensional liquid crystal display device; or, adding a phase delay before the conventional two-dimensional liquid crystal display device The device can be converted into a three-dimensional liquid crystal display device; therefore, it is convenient to switch between the three-dimensional display and the two-dimensional display.

According to still another aspect of the present invention, a polarization phase retarder includes: the above phase retarder; a linear polarizer located on a light incident side of the phase retarder, a vibration transmission direction of the linear polarizer and the first The angle between the directions is 45 degrees.

The polarization phase retarder of the embodiment of the invention has the above-mentioned phase retarder, so that it has the advantages of flexible viewing angle, simple structure, low cost, and low luminance loss; at the same time, the polarization phase retarder also has a linear polarizer, so it is itself The source light can be converted into linearly polarized light, so that it is not necessary to consider the polarization state of the source light when it is used, so it can be used for other display panels other than the liquid crystal display panel, such as an electroluminescence display panel, a plasma display panel, or the like. In the liquid crystal display in which the polarization direction of the emitted linearly polarized light is not at an angle of 45 degrees with the first direction, the utility model has wide application range and flexible use.

According to still another aspect of the present invention, a three-dimensional display device includes: a display panel; the polarization phase retarder disposed in front of the display panel, and the light-transmitting strip and the display panel for displaying the first The positions of the images are opposite, and the gap between the light-transmissive strips is opposite to the position on the liquid crystal display panel for displaying the second image.

Since the above-mentioned polarization phase retarder is used in the three-dimensional display device of the embodiment of the invention, the display panel can be of any type, so that the application range is wide, the use is flexible, the viewing angle is flexible, the structure is simple, the cost is low, and the brightness is lost. small. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly described below. It is obvious that the drawings in the following description relate only to some embodiments of the present invention, and are not intended to limit the present invention. .

1 is a schematic view showing a division of a display area of a three-dimensional liquid crystal display panel;

2 is a schematic plan view showing a first substrate of a phase retarder according to Embodiment 2 of the present invention; FIG. 3 is a cross-sectional structural view showing a liquid crystal three-dimensional display device according to Embodiment 4 of the present invention; Schematic diagram of the cross-sectional structure of the three-dimensional display device.

Reference mark: 1, the first substrate; 2, the second substrate; 3, the line polarizer; 5, the alignment layer; 6, the liquid crystal material; 7, the first direction; 81, the light strip; 82, the light strip gap; Panel; 91, a first display area; 92, a second display area. Detailed ways

The technical solutions of the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings of the embodiments of the present invention. It is apparent that the described embodiments are part of the embodiments of the invention, rather than all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the described embodiments of the present invention without departing from the scope of the invention are within the scope of the invention.

Unless otherwise defined, technical terms or scientific terms used herein shall be of the ordinary meaning understood by those of ordinary skill in the art to which the invention pertains. The words "first", "second" and similar terms used in the specification and claims of the present invention do not denote any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the words "a" or "an" do not denote a quantity limitation, but rather mean that there is at least one. The words "including" or "comprising", etc., are intended to mean that the elements or objects preceding "including" or "comprising" are intended to encompass the elements or Component or object. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right", etc. are only used to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationship may also change accordingly.

Example 1

This embodiment provides a phase retarder including: a first substrate and a second substrate.

a light-transmitting strip disposed parallel to and spaced apart from each other on an inner side of the first substrate (ie, a side facing the second substrate); and an alignment direction along the first direction is formed on the first substrate and the second substrate The layer (the alignment layer should be located inside the first substrate and the second substrate), the first direction is parallel to the first substrate; and the first substrate and the second substrate are filled with a liquid crystal material.

In the phase retarder of this embodiment, a light-transmitting strip is disposed inside the first substrate, so that the thickness of the liquid crystal layer is different at a position where the light-transmitting strip and the light-transmitting strip are not provided, and the two substrates are respectively provided along the first a directional alignment layer, such that the liquid crystal material filled between the first and second substrates is also in the first direction Orientation. Therefore, when linearly polarized light is incident on the phase retarder, it is converted into circularly polarized light or elliptically polarized light having different rotational directions at different positions, thereby being used for realizing a three-dimensional display effect.

Since the phase retarder of the embodiment is composed only of the substrate, the light-transmitting strip and the liquid crystal layer, it does not need to be energized, has low energy consumption, and has a simple structure and low cost; and since it generates circularly polarized light, the viewing angle is Flexible; at the same time, due to the different thickness of the liquid crystal layer at different positions, it can directly convert linearly polarized light with the same polarization direction (ie, light emitted by a conventional liquid crystal display panel) into left-handed and right-handed circularly polarized light without first Since linearly polarized light having different polarization directions is generated, the number of filtering times is small and the luminance loss is small.

Example 2

As shown in FIG. 2 and FIG. 3, the embodiment provides a phase retarder comprising transparent and transparent first substrate 1 and second substrate 2; the two substrates can be conventional glass. Substrate.

The liquid crystal material 6 is filled between the first substrate 1 and the second substrate 2; of course, in order to support, another structure (not shown) such as a spacer may be provided between the two substrates. The spacer may be a column spacer, a spherical spacer or the like.

An inner side of the two substrates is provided with an alignment layer 5 aligned in the first direction 7, so that the molecules of the liquid crystal material 6 filled between the two substrates should be arranged along the first direction 7, the first direction 7 being parallel to the first substrate 1; That is, the long-axis directions of the molecules of the liquid crystal material 6 are parallel to each other and are both parallel to the first substrate 1 (and, of course, also parallel to the second substrate 2), and the molecular end portions have the same orientation.

Preferably, the liquid crystal material 6 is a nematic liquid crystal material 6; since the molecules of the nematic liquid crystal material 6 are automatically arranged in parallel with each other, it is relatively easy to realize the above-described arrangement rule using such liquid crystal material 6. It is also possible to use other types of liquid crystal materials 6 such as a cholesteric liquid crystal material 6, as long as the liquid crystal material 6 molecules can be arranged in the first direction 7, and if necessary, a chiral additive, an electric field, or the like can be simultaneously added.

As shown in FIG. 2, a plurality of light-transmitting strips arranged parallel to each other and spaced apart are disposed inside the first substrate 1.

81; The parameters such as the width, the pitch, and the like of the light-transmitting strip 81 can be determined according to the conditions of the first display area 91 and the second display area 92 of the liquid crystal display panel 9 corresponding to the phase retarder. The first display area 91 and the second display area 92 refer to portions of the liquid crystal display panel 9 for displaying the first image and the second image, respectively, which are divided according to the displayed image, and do not represent the liquid crystal display panel. The structure of 9 must also be divided into two zones. Preferably, the light-transmitting strip 81 is made of a transparent resin material; since the light-transmitting strip 81 of such a material is low in cost and can be easily formed by a conventional patterning process.

It can be seen that by selecting the distance between the first substrate 1 and the second substrate 2 and the thickness h of the light-transmitting strip 81, the thickness of the liquid crystal layer having the light-transmitting strip 81 can be controlled (ie, equal to dO and the gap 82 of the light-transmitting strip). The liquid crystal layer has a thickness d ₂ (equal to - h).

Specifically, the distance between the first substrate 1 and the second substrate 2 (that is, the thickness of the liquid crystal layer at the gap 82 of the light-transmitting strip) and the thickness h of the light-transmitting strip 81 should satisfy the following relationship:

d corpse (21^+1)λ/(4 Δ η) , h=(k _h )/(2An); where λ is the wavelength of light transmitted through the phase retarder, and Δ η is the birefringence of the liquid crystal material 6 The rate (i.e., the difference between the refractive index of the liquid crystal material 6 for extraordinary light and the refractive index for ordinary light, usually about 0.12) is a positive integer, and k _h is a positive odd number less than or equal to.

Thereby, the distance between the light-transmitting strip 81 and the second substrate 2 (that is, the thickness of the liquid crystal layer at the light-transmitting strip 81) d ₂ =di -

- 2k _h +l)X/(4△!!).

According to the optical principle, when linearly polarized light having a polarization direction of 45 degrees from the first direction 7 (ie, the molecular arrangement direction of the liquid crystal material 6) is incident on the liquid crystal layer, if the thickness of the liquid crystal layer is (1 ι=(213⁄4+1)λ/ (4 Δ n), k _L =l, 3, 5... , then it will turn into left-handed circularly polarized light when it is emitted; and if the liquid crystal layer is thick (3⁄4=(213⁄4+1)^(4 Δ η), When k _R =0, 2, 4..., it will be converted into left-handed circularly polarized light when it is emitted.

It can be seen that, according to the above formula, the thickness of the liquid crystal layer at the gap 82 of the light strip is necessarily equal to d _L or d _R ; and the difference h between d ₂ and is equal to an odd multiple of λ/2 Δη; therefore, d _{2 is} necessarily opposite to The value, ie, ^ equals d _L , d ₂ must be equal to d _R , and equal to d _R , d ₂ must be equal to d _L . That is, in the thickness of the liquid crystal layer at the light-transmitting strip gap 82 and the thickness d ₂ of the liquid crystal layer at the light-transmitting strip 81, one must be equal to d _L and the other equal to d _R ; therefore, when the polarization direction is the first direction When linearly polarized light having a 45-degree angle of 7 passes through the phase retarder, it is inevitably converted into left-handed and right-handed circularly polarized light, respectively, depending on the position.

Preferably, when determining dh,

Since the thickness of the liquid crystal layer is constant, it can only convert linearly polarized light of a certain wavelength into strictly circularly polarized light, while linearly polarized light of other wavelengths can only be converted into elliptically polarized light; It is the median value of the visible light wavelength range (400nm~700nm). Therefore, using this value as the wavelength determination and h, all visible light can be converted into elliptically polarized light closer to circularly polarized light after passing through the phase retarder. Thereby obtaining a better overall three-dimensional display effect. Preferably, when determining (Uo h, taking

Δη=0.12, k corpse 1 , k _h =l , thus obtaining d corpse 3λ/(4 Δ η)=3.4μπι, h= /(2 Δ _η )=2.3μπι, ά ₂ =λ/(4 Δ _η ) =1.1μπι; At this time, the linearly polarized light having a wavelength of 550 nm and a polarization direction at a 45-degree angle with the first direction 7 passes through the liquid crystal layer at the gap 82 of the light-transmitting strip (after thick dO, it becomes left-handed circularly polarized light, and wears After passing through the liquid crystal layer (thickness d ₂ ) at the light-transmissive strip 81, it becomes a right-handed circularly polarized light. Alternatively, it may also be taken.

k _h =l , thus obtaining d corpse 5λ/(4 Δ η)=5.7μπι, h= /(2 Δ _η )=2.3μπι, ά ₂ =3λ/(4 Δ _η )=3.4μπι; 550 nm, the linearly polarized light having a polarization direction at a 45 degree angle to the first direction 7 passes through the liquid crystal layer at the light transmission strip gap 82 (thickness becomes a right-handed circularly polarized light, and the liquid crystal passes through the light-transmitting strip 81) Layer (: thicker will become left-handed circularly polarized light.

The values of h and h above are the minimum two and h values that can achieve the three-dimensional display effect, that is, the two values and the h value which can make the thickness of the phase retarder the thinnest, which is advantageous for realizing thinning of the device and reducing cost. .

Of course, strictly speaking, the presence of the above alignment layer 5 has some influence on the thickness of the liquid crystal layer, but since the thickness is very thin, the influence is small, so it may be disregarded.

In the phase retarder of this embodiment, by providing the light-transmitting strips, the liquid crystal layers at different positions are simply made to have different desired thicknesses, so that the effect of three-dimensional display can be achieved.

Example 3

This embodiment provides a method of preparing the above phase retarder, which comprises the following steps.

501. Form the light-transmitting strip on the first substrate by a patterning process.

The patterning process includes a photolithography process, an inkjet printing process, etc., and a photolithography process is preferred from a technical maturity point of view.

The method of forming a light-transmissive strip by a patterning process is diverse. For example, a positive transparent photoresist material having a thickness h may be coated on the first substrate, and then the position of the gap of the light-transmitting strip is exposed, and then developed, thereby obtaining the above-mentioned light-transmitting strip (ie, the remaining photoresist material) As a light strip). Alternatively, a negative transparent photoresist material having a thickness h may be applied on the first substrate, and then the position of the light-transmissive strip may be exposed and developed. Alternatively, the photoresist material may be deposited first (not necessarily transparent), and then the photoresist material to be formed into the light-transmitting strip portion is removed by an exposure and development process, and then the light-transmitting material having a thickness h is deposited, and finally the remaining photoresist material is deposited. And the light-transmitting material thereon is removed to obtain a light-transmitting strip.

502. Form an alignment layer (such as a polyimide (PI) alignment layer) on the first substrate and the second substrate, respectively, and rub them separately by rubbing or the like to obtain fine trenches. Both the first substrate and the second substrate may be aligned in the first direction.

503. Set the liquid crystal material to the first substrate or the second substrate by an ODF (One Drop Filling) method.

504. Apply a sealant to seal the first substrate and the second substrate.

Of course, the method for preparing the phase retarder of the embodiment can also perform many changes, for example, it can also include the steps of pre-treating the substrate, the step of arranging the spacers, and the like; the film alignment process can also be performed by other methods such as illumination alignment. Alternatively, the liquid crystal material may be added by other methods such as perfusion (for example, vacuum infusion).

Due to the method for preparing the phase retarder of the embodiment, the transparent strip can be directly formed by a conventional patterning process to control the thickness of the liquid crystal layer at different positions, so that the preparation method is simple and reliable, the yield is high, and the formed bit delay The viewing angle is flexible, the structure is simple, the cost is low, and the brightness loss is small.

Example 4

As shown in Fig. 1, Fig. 2, and Fig. 3, the present embodiment provides a liquid crystal three-dimensional display device including a liquid crystal display panel 9 and a phase retarder of the above embodiment.

The phase retarder is disposed in front of the liquid crystal display panel 9. As shown in FIG. 3, the light-transmitting strip 81 is opposite to the position on the liquid crystal display panel 9 for displaying the first image (that is, the first display area 91). The gap 82 between the light-transmitting strips is opposite to the position on the liquid crystal display panel 9 for displaying the second image (that is, the second display area 92), and the polarization direction of the linearly polarized light emitted by the liquid crystal display panel 9 is the first direction 7 The angle between them is 45 degrees.

That is, the phase retarder is disposed in front of the liquid crystal display panel 9, wherein the liquid crystal arrangement side light strip 81 and the light strip gap 82 correspond to the two display areas of the liquid crystal display panel 9, respectively, and thus The light emitted from the display region 91 passes through the liquid crystal layer having a thickness d ₂ , and the light emitted from the second display region 92 passes through the liquid crystal layer having a thickness, thereby being converted into circularly polarized light having different rotation directions.

Thus, as long as the circular polarized glasses (the two lenses are a left-handed circular polarizer and a right-handed circular polarizer), the two eyes can respectively see the images displayed by the two display areas, thereby realizing the effect of three-dimensional display.

Of course, since the liquid crystal layer actually can only convert light of a specific wavelength (such as 550 nm) into a strict circle Polarized light, other wavelengths of light are only converted into elliptically polarized light of approximately circularly polarized light, and elliptically polarized light cannot be completely filtered by circular polarizers, so the images seen by both eyes may slightly interfere with each other, but This does not affect the implementation of the 3D display effect.

The liquid crystal three-dimensional display device in this embodiment may be a liquid crystal display, a liquid crystal television, a mobile phone or the like.

Since the liquid crystal three-dimensional display device of the present embodiment has the above-described phase retarder, the viewing angle is flexible, the structure is simple, the cost is low, and the luminance loss is small. Meanwhile, since the hardware structure of the display panel in the liquid crystal three-dimensional display device is not different from the liquid crystal display panel for two-dimensional (2D) display (the display area can be divided by controlling the driving method), as long as the phase retarder is removed, It can also be used as a conventional two-dimensional liquid crystal display device; or, a conventional two-dimensional liquid crystal display device can be converted into a three-dimensional liquid crystal display device by adding a phase retarder; thus, between three-dimensional display and two-dimensional display The switching is convenient.

Example 5

As shown in FIG. 2 and FIG. 4, the present embodiment provides a polarization phase retarder, comprising: the above phase retarder; a line polarizer 3 located on the light incident side of the phase retarder, and the line polarizer 3 The angle between the direction of the vibration transmission and the first direction 7 is 45 degrees.

That is, the polarization phase retarder of the present embodiment is composed of the linear polarizer 3 and the above-described phase retarder; when the light is incident thereto, it will first pass through the linear polarizer 3 to become linearly polarized light of a specific direction, and then pass through the above. The phase retarder becomes a left-handed and right-handed circularly polarized light.

The polarization phase retarder of the present embodiment has the above-described phase retarder, so that it has the advantages of flexible viewing angle, simple structure, low cost, and low luminance loss; at the same time, the polarization phase retarder also has a linear polarizer, so it is itself The source light can be converted into linearly polarized light, so that it is not necessary to consider the polarization state of the source light, so it can be used for other display panels other than the liquid crystal display panel, such as an electroluminescence display panel, a plasma display panel, or the like. The liquid crystal display in which the polarization direction of the emitted linearly polarized light is not at an angle of 45 degrees with the first direction has a wide application range and is flexible in use.

Example 6

As shown in FIG. 1 , FIG. 2 and FIG. 4 , the embodiment provides a three-dimensional display device, including: a display panel 9; the above-mentioned polarization phase retarder disposed in front of the display panel 9 , the light-transmitting strip 81 and the display The position on the panel 9 for displaying the first image (ie, the first display area 91) is opposite, and the gap 82 between the light-transmissive strips is opposite to the position on the display panel 9 for displaying the second image (ie, the second display area 92). . The three-dimensional display device of the present embodiment has a structure similar to that of the above-described liquid crystal three-dimensional display device, except that it replaces the phase retarder with the polarization phase retarder of the above embodiment; therefore, the display device therein can be electronic paper, organic electro The light-emitting display panel, the digital photo frame, the mobile phone, the tablet computer, etc., have wide application range, flexible use, flexible viewing angle, simple structure, low cost and low brightness loss.

The above is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention. The scope of the present invention is defined by the appended claims.

Claims

Claim

A phase retarder comprising: a first substrate and a second substrate; wherein

A light-transmitting strip arranged parallel to each other and spaced apart is disposed inside the first substrate;

Forming an alignment layer aligned along the first direction on the first substrate and the second substrate, the first direction being parallel to the first substrate;

A liquid crystal material is filled between the first substrate and the second substrate.

2. The phase retarder according to claim 1, wherein

The distance between the first substrate and the second substrate is such that the thickness of the light-transmitting strip is h; ^ and h satisfy the following relationship:

3. The phase retarder according to claim 2, wherein

The λ=550

4. The phase retarder according to claim 3, wherein

The An=0.12, k corpse 1 , k _h =l , d corpus 3.4μπι, 1ι=2.3μπι;

Or

The An=0.12,

The phase retarder according to any one of claims 1 to 4, wherein

The liquid crystal material is a nematic liquid crystal material.

The phase retarder according to any one of claims 1 to 4, wherein

The light transmitting strip is composed of a light transmissive resin material.

A method of preparing the phase retarder according to any one of claims 1 to 6, comprising: forming the light-transmitting strip on the first substrate by a patterning process.

8. A liquid crystal three-dimensional display device comprising:

Liquid crystal display panel;

The phase retarder according to any one of claims 1 to 6, which is disposed in front of the liquid crystal display panel, wherein the light-transmitting strip is opposite to a position on the liquid crystal display panel for displaying the first image, and the light-transmitting strip is The gap is opposite to a position on the liquid crystal display panel for displaying the second image, and an angle between a polarization direction of the linearly polarized light emitted by the liquid crystal display panel and the first direction is 45 degrees.

9. A polarization phase retarder comprising:

The phase retarder according to any one of claims 1 to 6;

a linear polarizer located on the light incident side of the phase retarder, wherein an angle between a vibration transmitting direction of the linear polarizer and the first direction is 45 degrees.

10. A three-dimensional display device comprising:

Display panel

The polarization phase retarder of claim 9 disposed in front of the display panel, wherein the light-transmitting strip is opposite to a position on the display panel for displaying the first image, and the gap between the light-transmitting strips is used on the display panel The position at which the second image is displayed is opposite.