TW201627723A - Methods for mura mitigation in curved liquid crystal displays - Google Patents

Abstract

Disclosed herein are methods for manufacturing curved liquid crystal display devices, the methods comprising determining the stress-retardance of a curved glass sheet in the liquid crystal display, determining a modified pre-tilt retardance for at least one layer of the liquid crystal layer, and adjusting the pre-tilt retardance of the liquid crystal layer. Methods for reducing light leakage in curved liquid crystal display devices are also disclosed herein as well as curved liquid crystal display devices manufactured according to these methods.

Description

Method for mitigating stains in curved liquid crystal displays [Reciprocal Reference of Related Applications]

The present application claims the priority of the U.S. Provisional Application Serial No. 62/100,347, filed on Jan. 6, 2015, the content of which is hereby incorporated by All incorporated herein.

The present disclosure is directed to curved liquid crystal displays, and more particularly to methods for mitigating stains in curved, vertically aligned liquid crystal displays.

High-performance display devices such as liquid crystal displays (LCDs) and organic light-emitting diode (OLED) displays are commonly used in a variety of electronic devices, such as cellular phones, laptops, and electronic tablets. Computers, televisions, and computer monitors. To cite a few examples, currently commercially available display devices may use, for example, one or more high precision glass sheets as substrates for the electronic circuit components or as a substrate for the color filters.

LCDs are the most commonly used types of flat panel displays currently in use, and typically include two substantially flat display panels and an intermediate liquid crystal layer that is equipped with field generating electrodes such as pixel electrodes and common electrodes. The sub-pixel circuitry of the LCD supplies and delivers an electric field throughout the liquid crystal layer by applying a corresponding voltage across the field generating electrodes. This electric field determines the orientation of the liquid crystal molecules in the liquid crystal layer and controls the phase retardation (blocking) of the polarized incident light passing through the liquid crystal. Thus, in addition to the front and rear polarizers, the liquid crystal layer may be the only other polarization changing component in the LCD, but some LCDs may employ additional static compensation films that are laminated to one or more of the polarizers. The inner surface is used to improve the viewing angle performance.

During fabrication, the LCD glass substrate can be carefully controlled to limit or eliminate inherent stress (blocking) non-uniformities, such as inherent stress relief can be limited to less than a fraction of the blocking wave. Sources of stress retardation in LCD glass substrates may include non-uniform temperatures, such as from backlights; external forces on the glass, such as from mounting an LCD panel on its frame; and deformation of the panel from its natural planar shape. For example from curved panels for special designs. It is important to manage this type of stress-blocking external source during the design and manufacture of the LCD to limit image distortion.

LCDs are often used as display devices in television receivers, and market trends have led to increased display sizes to provide a more cinema-like home viewing experience. A recent development in this trend has been to make LCD displays with a curved configuration rather than a conventional flat design. This configuration can alleviate the difference in observation experienced between an observer arranged to be viewed from the front of the display center and an observer arranged to be viewed from the left or right side of the display. The curved display device can be formed by recessing or convexly displaying the display panel to compensate for the difference in viewing. The display device can be of the vertical type, at In this case, the vertical height is greater than the horizontal width and the monitor is curved about the vertical axis, or is of the lateral type, in which case the vertical height is less than the horizontal width and the monitor is curved about the horizontal axis.

Nonetheless, as discussed previously, when the display device panel is bent or bent, an external stress relief can occur, and light leakage or "spots" can produce visible artifacts to the user at a perceptible level. Such buckling or bending may cause stress retardation in the LCD substrate glass, and the birefringence of the substrates is coupled to the liquid crystal light, resulting in light leakage in the display device. For example, in black (zero gray scale) and low gray scale, the harmful light leakage area of the defect level may exist in the curved LCD, such as near the corner of the display. Accordingly, it would be advantageous to provide a method for mitigating or eliminating light leakage in curved or curved display surfaces. In various embodiments, the methods disclosed herein minimize the occurrence of stains in curved multi-domain vertically aligned (VA) LCDs or prevent the generation of stains. According to certain embodiments, a curved VA LCD fabricated using the methods disclosed herein can exhibit superior performance in contrast and low grayscale image quality, and/or exhibit superior performance in low grayscale uniformity.

The present disclosure relates to a method for fabricating a curved liquid crystal display device, the method comprising bending a display assembly about a predetermined axis to form a curved display assembly, wherein the display assembly comprises a first glass sheet, a second glass sheet, and a liquid crystal layer disposed between the first glass plate and the second glass plate; determining a stress retardation of at least one of the first glass plate or the second glass plate; determining at least one corresponding region in the liquid crystal layer The corrected pre-tilt block in the domain; and adjusting the pre-tilt block of at least one corresponding region of the liquid crystal layer to the corrected pre-tilt block.

The present disclosure is also directed to a method for fabricating a curved liquid crystal display device, the method comprising determining a stress retardation of at least one region of a curved test glass sheet; determining a modified pre-tilt retardation in at least one corresponding region of the liquid crystal layer Adjusting a pre-tilt block in at least one of the at least one corresponding liquid crystal layer region to the corrected pre-tilt block; attaching the first surface of the first glass plate to the second surface of the second glass plate, at A liquid crystal layer is disposed between a glass sheet and the second glass sheet to form a display assembly; and the display assembly is bent about a predetermined axis to form a curved liquid crystal display device. In various embodiments, the test glass sheet has substantially the same characteristics as the first glass sheet and the second glass sheet (eg, size, radius of curvature, and axis of curvature, and composition).

Further disclosed in the present disclosure are curved liquid crystal display devices fabricated in accordance with such methods. Further disclosed in the present disclosure is a method for reducing light leakage in a curved liquid crystal display device, the method comprising one or more of the steps disclosed in the present invention, such as determining a curved liquid crystal display or a glass plate in a test glass plate. The stress retardation in at least one region determines the corrected pre-tilt block of the liquid crystal layer and adjusts the pre-tilt block of at least one region of the liquid crystal layer to the corrected pre-tilt block.

The additional features and advantages of the present disclosure are set forth in the Detailed Description of the <RTIgt; </RTI> <RTIgt; </ RTI> <RTIgt; These additional features and advantages are recognized by the implementation of the methods described in the following detailed description, the scope of the claims, and the accompanying drawings.

It is to be understood that the foregoing general description and the claims The accompanying drawings are included to provide a further understanding of this disclosure, The drawings illustrate various disclosures of the present disclosure, and together with the specification,

100‧‧‧Display unit

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧Liquid layer

140‧‧‧Sealant

150‧‧‧ rear polarizer

160‧‧‧ front polarizer

170‧‧‧liquid crystal molecules

180‧‧‧Backlight unit

May be best understood in the following description when read in conjunction with the following drawings in detail, those drawings, similar structure as indicated by reference numeral Similarly, these drawings: FIG. 1 is an exemplary embodiment of a A perspective view of the curved display device; FIG. 2 is a cross-sectional view of the curved display device of FIG . 1; FIGS. 3A and 3B are schematic views illustrating the operation principle of the VA LCD; FIG. 4 has Schematic diagram of the retardation orientation of a curved glass sheet along the radius of curvature of the horizontal axis; Figure 5 is a schematic diagram of the pre-tilt orientation of an exemplary liquid crystal layer; Figure 6 is a transmission of the tested curved glass and a +45 degree VA liquid crystal pretilt illustration of the orientation; FIG. 7 is a VA liquid crystal transmittance and -45 degrees tested curved glass pretilt orientation illustrated; and FIG. 8 is equal measure by transmission and local bending of the glass and +45 degrees Graphical illustration of -45 degree VA liquid crystal pre-tilt orientation.

Methods for fabricating curved liquid crystal display devices and methods for reducing light leakage in curved liquid crystal display devices are disclosed in the present disclosure. By measuring or calculating (eg, by using a finite element method) the stress retardation and/or orientation in one or more regions of a curved glass sheet in a liquid crystal display device, it is possible to calculate the device by using the method disclosed in the present disclosure. The corrected pre-tilt angle and/or orientation of the corresponding region of the middle liquid crystal layer may, in some embodiments, reduce or eliminate light leakage (stain) in the curved display device. In various embodiments, the modified pre-tilt retardation of the liquid crystal layer can be selected to resist stress retardation caused by glass bending in one or more regions of the display device, thereby reducing or eliminating such regions. Light leakage. For example, by changing the liquid crystal pretilt angle and orientation, the residual retardation of the liquid crystal can substantially offset the stress retardation from the curved glass substrate in these regions at low gray levels, if there is no such correction in the region There is unacceptable light leakage. LCDs produced according to such methods, such as multi-domain vertically aligned (MVA) LCDs, are also disclosed in this disclosure.

Blocking has both direction (orientation) and magnitude. Thus, as used herein, "stress retardation" is intended to include the magnitude and/or orientation of the glass sheet retardation. Similarly, "pretilt block" is intended to include the magnitude and orientation of the liquid crystal block. The pretilt angle can be calculated by using the pretilt block value using the following formula: PreTiltRetMag=Δnx sin(PreTiltAngle) where Δn=n _e -n _o , where n _e is abnormal and n _o is liquid crystal The general ordinary refractive index.

It should be noted that the terms "flat", "sheet", "substrate", "device" and variations of these terms are used interchangeably in this disclosure, and such use should not limit the scope of the patent application scope of the present application. . It should be further noted that the terms "bending", "bending" and variations of these terms are used interchangeably in this disclosure, and such use should not limit the scope of the patent application scope of the present application.

Embodiments of the present disclosure will be discussed with reference to Figures 1-2, which show views of an exemplary curved display device. 1 is a perspective view of a curved display device, and FIG. 2 is a cross-sectional view of the curved display device taken along line A-A in FIG. 1. Referring to FIGS. 1-2, a curved display device according to some embodiments may include a display unit 100 including a first substrate 110, a second substrate 120, and a liquid crystal positioned between the first substrate 110 and the second substrate 120. The layer 130 faces the first substrate 110 and is spaced apart from the first substrate 110.

An edge annular encapsulant 140 may be provided along the edges of the first substrate 110 and the second substrate 120 to seal the liquid crystal material inside the display unit 100. The first substrate 110 and the second substrate 120 may be bonded to each other by a sealant 140, thereby forming a cavity including a liquid crystal layer 130 between the substrate 110 and the substrate 120. The exemplary curved display device can also include one or more securing members (not shown) that are configured to secure the shape of the substrate 110, 120 to have a predetermined curvature relative to a predetermined axis of curvature. In some embodiments, the sealant 140 can have a cross-sectional width of about 2 mm or less.

As shown in FIGS. 1-2, the first substrate 110 and the second substrate 120 of the curved display device 100 may be bent or bent to have a predetermined curvature with respect to a common central vertical axis or a horizontal axis. This curvature can be a single simple radius or a more complex shape with multiple radii. In some embodiments, the user of the display may face a portion that is concavely curved in a horizontal direction (the left and right directions of the observer). More specifically, the user faces the display device on the side of the second substrate 120. The first substrate 110 and the second substrate 120 may also be bent to have respective predetermined radii of curvature sharing a common midpoint or a central axis. In the illustrated non-limiting embodiment, in FIG. 2, the center of curvature radius in the horizontal direction is positioned below the second substrate 120, that is, on the side of the position where the user is positioned to view the image on the display.

The exemplary liquid crystal layer 130 implanted between the first substrate 110 and the second substrate 120 may comprise any or all types of liquid crystal materials known in the art, such as twisted nematics, to name a few. Nematic; TN) mode, vertically aligned (VA) mode, in plane switching (IPS) mode, blue phase (BP) mode, fringe field switching (FFS) mode , and Advanced Super Dimension Switch (ADS) mode. According to various embodiments, the liquid crystal layer 130 may be a vertically aligned (VA) liquid crystal material. Moreover, although not shown in the drawings, the initial liquid crystal alignment layer may be included on at least one of the first substrate 110 and the second substrate 120. Furthermore, the alignment layer can be rubbed in a predetermined direction or optically aligned to provide initial alignment (e.g., tilt and orientation) of the liquid crystal molecules in the absence of an electric field. Alternatively, at least one of the liquid crystal layer 130 and the alignment layer may comprise a photopolymerizable material.

As noted above, when the display device panel is bent or bent, light leakage from the display device can cause artifacts that are visible to the user. The curvature of the glass can cause stress retardation in the glass of the LCD substrate, the birefringence of which is coupled to the liquid crystal light, thereby producing light leakage in numerous embodiments such as the VA mode. Figure 3 is a schematic diagram showing the principle of operation of a VA LCD having a planar substrate. Referring to Fig. 3, the transmission axes of the rear polarizer 150 and the front polarizer 160 are in the orthogonal direction. When no electric field is applied (closed position), the liquid crystal molecules 170 in the liquid crystal layer 130 between the first substrate 110 and the second substrate 120 may be aligned at right angles with respect to the substrate (in-line alignment).

For VA or MVA, when no voltage is applied, the light L of the backlight unit 180 passes through the rear polarizer 150 and then passes through the liquid crystal layer without change. The polarization is polarized and thus blocked by the front polarizer 160, which is oriented 90 degrees relative to the rear polarizer 150. When a voltage (on position) is applied, the electrodes on the first substrate 110 and the second substrate 120 generate an electric field parallel to the substrate. Depending on the electric field strength, the liquid crystal molecules 170, which are oriented at 45 degrees with respect to the polarizer, can be rotated to an oblique position and the polarization of the light L can be changed, thereby allowing light to pass through the front polarizer 160. Figure 3 illustrates liquid crystal molecules 170 in a fully horizontal position in the open position, although it will be understood that a variety of tilt angles are also possible and are intended to be within the scope of the present disclosure.

As illustrated in Figure 3, in a conventional (flat) VA LCD configuration, in the off position, the light is blocked by the front polarizer and the LCD theoretically displays a black image. However, when a curved substrate is used, a glass region having a curvature may be susceptible to light leakage, which may be perceived by the user as blurring or color distortion. For example, a curved glass substrate can have a significant ±45 degree directional stress retardation (phase retardation), for example, in a region near the corner. Figure 4 illustrates the measured retardation orientation of a 0.5 mm thick test glass sheet (approximately 160 mm x 200 mm) having a radius of curvature approximately equal to 1300 mm. The circular regions A-D generally indicate regions in which ±45 degrees of stress retardation may be present in the glass sheet. Since 0 degrees/90 degrees may be eliminated by a 0 to 90 degree cross front polarizer and a rear polarizer, a ±45 degree stress block may cause corner leakage (stain).

In conventional VA LCDs, each sub-pixel can have a number of different domains with various pre-tilt orientations to provide a directional average of the liquid crystal in the viewing direction. The pre-tilt alignment of the liquid crystal molecules can be achieved by, for example, treating the inner surfaces of the first substrate and the second substrate with an alignment layer to align adjacent liquid crystal molecules at a desired angle. For example, Figure 5 illustrates a general schematic diagram illustrating the pre-tilt orientation of an exemplary liquid crystal layer. The inner surface of the substrate S (for example, the first substrate and/or the second substrate) may be coated with the polymer P and rubbed in a desired direction R such that the molecules themselves are aligned in the rubbing direction when the liquid crystal molecules LC are filled. The resulting liquid crystal molecule tilt θ _P is regarded as a pretilt angle. Suitable alignment layers can include, for example, polymers such as polyimine.

Applicants have discovered that the stress retardation (or phase retardation) of curved glass can be combined with the pre-tilt block of the liquid crystal in addition and/or subtraction mode, depending on the relative orientation and magnitude of the two. Applicants therefore believe that light leakage or staining in a curved VA LCD can be mitigated or eliminated by orienting the pre-tilt orientation of the liquid crystal to a retardation orientation of about 90 degrees with the curved glass, and/or adjusting the liquid crystal pretilt. The angle is given a value that is approximately matched to the amount of retardation of the curved glass. In fact, VA and MVA LCDs with horizontal polarizers and vertical polarizers can experience unwanted light leakage in areas where the bending glass stress is retarded by about ±45 degrees. Without wishing to be bound by theory, the pre-tilt orientation and magnitude may be varied such that the liquid crystal pre-tilt block counteracts the retardation caused by the stress in the curved glass region.

Since the stress retardation orientation of the curved glass may vary by the order of centimeters, the pretilt orientation of the liquid crystal panel may vary on the order of tens of microns. Under normal circumstances, the composite effect of local ±45 degree curved glass stress retardation orientation after each sub-pixel averaged over a ±45 degree pre-tilt orientation domain can be observed. This effect can be divided into three different situations.

Case 1: +45 degree pre-tilt LC orientation with corner stress retardation of ±45 degrees orientation

Solving the transmission equation of +45 degree directional pre-tilt block (degree of latitude), which gives a contrast 5000 black state to the ideal VA LC without glass block, which gives a pre-tilt block of 1.621 degrees value. The Miller matrix black state VA LC for a +45 degree pretilt is therefore:

A transmitted color patch image is obtained using the following Miller matrix transmission equation, which uses the glass retardation data measured for a +45 degree pretilt, 0.5 mm thickness bend with a black state VA LC to produce the image in Figure 6 image.

As can be seen in Fig. 6, there is almost no or no stain in the corner corresponding to the bending stress-45 degree orientation of the curved glass, but there is a color plaque in the corner with a curved glass stress retardation of +45 degrees (substantially Circular areas B, C indicate). By simplifying the +45 degree pre-tilt orientation and the transmission model of the -45 degree curved glass stress-blocking orientation, the following formula can be obtained: In this case, the interaction term is negative, such as indicating a decrease in light leakage from the glass and pre-tilt block. By solving the zero-spot condition, the following formula can be obtained: CurvedGlassRetNm=(5/18)*Pi*VApretiltDeg

Similarly, by simplifying the transmission model of +45 degree pre-tilt orientation and +45 degree curved glass stress retardation orientation, the following formula can be obtained: In this case, the interaction term is positive, for example, indicating that the light leakage from the glass and the pre-tilt block is additive (the combined leakage is greater than the leakage of either individual component).

Case 2: -45 degree pre-tilt LC orientation with corner stress retardation of ±45 degrees orientation

Similar to case 1 above, for -45 degree orientation (LC pre-tilt orientation) Radian) solves the transmission equation. Similarly, an ideal VA LC without glass block produces a pre-tilt block value of 1.621 degrees in a contrast of 5000 black. For the -45 degree pre-tilt Miller matrix black state VA LC is therefore:

A transmission color patch image was generated using a Miller matrix transmission equation using a retardation data measured for a -45 degree pretilt, 0.5 mm thick curved glass having a black state VA LC to produce the image in FIG. As can be seen in Fig. 7, there is almost no or no stain in the corner corresponding to the curved glass stress retardation +45 degree orientation, but there is a stain in the corner with curved glass stress retardation -45 degree orientation (generally by the circle) Shape areas A, D indicate). By simplifying the transmission model of -45 degree pre-tilt orientation and +45 degree curved glass stress retardation orientation, the following formula can be obtained: In this case, the interaction term is negative, such as indicating glass leakage and pre-tilt block reduction. Similarly, by simplifying the -45 degree pre-tilt orientation and the -45 degree bending glass stress-blocking orientation transmission model, the following formula can be obtained: In this case, the interaction term is positive, for example, indicating that the light leakage from the glass and the pre-tilt block is additive (the combined leakage is greater than the leakage of either individual component).

Case 3: +45 degree pre-tilt LC orientation with corner stress retardation of ±45 degrees orientation

In "real", such as a commercial VA LCD, each pixel has the same number of two pre-tilt oriented LC domains. Thus, images are generated based on the local averaging of the +45 degrees and -45 degrees LC pre-tilt domains, which act on the same locally curved glass stress-blocking orientation.

A transmitted color patch image is generated using a Miller matrix transmission equation using a pre-tilt orientation for +45 degrees and -45 degrees (assuming a weighted average of 50% for each contribution), a thickness of 0.5 mm for a black state VA LC The blockage data measured by the curved glass is used to produce the image in Figure 8. As can be seen in Figure 8, there are spots on all four corners (generally indicated by the circular area AD). Similarly, by simplifying the ±45 degree pre-tilt orientation and the transmission model of the +45 degree or -45 degree curved glass stress-blocking orientation, the following formula can be obtained: The interaction term is offset in both cases, resulting in the same result regardless of the bending retardation orientation of the curved glass.

In light of the foregoing, Applicants have developed a method of reducing or eliminating stains in curved LCDs by controlling the LC pre-tilt orientation angles and magnitudes corresponding to the stresses in the curved glass. As indicated above, the resulting transmission (light leakage) can be enhanced (positive interaction term), mitigated (negative interaction term), or can be an independent sum of individual light leakage for each component (LC and glass). In certain embodiments, the LC pre-tilt orientation can be modified to resist or balance the bending stress of the curved glass, thereby mitigating or eliminating unwanted light leakage.

By way of non-limiting example, the corrected pre-tilt block magnitude (and thus the corrected pre-tilt angle) can be calculated to counteract light leakage due to stress retardation in the glass bend region. The corrected pretilt angle can be calculated based on the stress retardation measurement of the glass plate in the curved LCD or the test curved glass plate. For example, a test glass sheet having substantially similar or identical characteristics to a glass sheet used in a curved LCD can be shaped to obtain a curvature that is required for bending the LCD. The curvature (see, for example, Figure 4) is generally similar or identical. Stress retardation in one or more regions of the curved LCD or test glass sheet can be measured, such as corner regions, but other regions such as the central region and surrounding regions can also be measured.

The corrected pre-tilt block of the corresponding region in the liquid crystal layer can be calculated by using the formula and method disclosed in the present application. Thus, at least one region of the liquid crystal layer (eg, at least one of the liquid crystal layers) can be adjusted to obtain a calculated corrected pre-tilt block. In a non-limiting embodiment, the relationships and models disclosed in this disclosure can be applied during the design, processing, and/or fabrication of curved LCDs to produce reduced color spots and/or excellent contrast, low grayscale image quality, and/or Low gray level uniformity display.

Although the method disclosed in the present application for reducing or eliminating VA LCD light leakage has been described, the scope of the patent application should not be limited thereto. For example, additional methods may include the use of one or more glass sheets or glass panels in LCDs operating in different modes, or using different display units having different characteristics, either alone or in combination with the embodiments disclosed herein.

The glass panels, panels or substrates described in this disclosure may comprise any glass known in the art for use in backlit displays such as LCDs, including but not limited to soda lime citrate, aluminosilicate, alkaline bismuth Acid salts, borosilicates, basic borosilicates, aluminum borosilicates, basic aluminum borosilicates, and other suitable glasses. In various embodiments, the glass substrate can be chemically enhanced and/or thermally tempered. To name a few, non-limiting examples of suitable substrates include commercially available Corning's EAGLE XG®, Lotus ^TM, Willow®, and Gorilla® glass. Such a chemically reinforced glass is provided, for example, in accordance with U.S. Patent Nos. 7,666,511, 4,483,700, and 5,674,790 each incorporated herein by reference.

In a non-limiting embodiment, the glass sheet, panel or substrate can have a thickness in the range of, for example, less than or equal to about 3 mm, from about 0.1 mm to about 2 mm, from about 0.3 mm to about 1.5 mm, from about 0.5 mm to Approximately 1.1 mm, or from about 0.7 mm to about 1 mm, including subranges of all ranges and ranges therein. According to various embodiments, the glass substrate may have a thickness in the range of less than or equal to 0.3 mm, such as 0.2 mm, or 0.1 mm, including subranges between all ranges and ranges therein. In certain non-limiting embodiments, the glass substrate can have a thickness ranging from about 0.3 mm to about 1.5 mm, such as from about 0.5 to about 1 mm, including subranges of all ranges and ranges therein.

The glass sheet, panel or substrate can have any shape and/or size suitable for use in an LCD. For example, the glass substrate can be a glass sheet having a rectangular, square, circular or any other suitable shape. In various embodiments, the glass substrate can be transparent or substantially transparent. As used in this context, the term "transparent" is intended to indicate that a glass substrate having a thickness of about 1 mm has a transmittance of greater than about 80% over a region of the visible spectrum (420-700 mm). For example, an exemplary transparent glass substrate can have a transmittance of greater than about 85% in the visible range, such as greater than about 90%, or greater than about 95%, including subranges across all ranges and ranges. In certain embodiments, an exemplary glass substrate can have a transmittance of greater than about 50% in an ultraviolet region (200-410 mm), such as greater than about 55%, greater than about 60%, greater than about 65%, greater than about 70%. , greater than about 75%, greater than about 80%, greater than about 85%, greater than about 90%, greater than about 95%, or greater than about 99% transmittance, including subranges across all ranges and ranges.

It will be appreciated that the various embodiments disclosed herein may be described in terms of specific features, elements or steps, which are described in connection with the particular embodiments. It is also to be understood that the specific features, elements, or steps are described in the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

It will also be understood that, as used in this context, the terms "the", "a" or "an" mean "at least one" and are not limited to "the only one" unless There are clear opposite instructions. Thus, for example, reference to "a component" includes instances of two or more such components, unless the context clearly indicates otherwise.

In the present case, the range may be expressed as "about" from a particular value, and/or to "about" another particular value. When such a range is expressed, an instance includes from the one particular value and/or to another particular value. Similarly, when values are expressed as approximations, by using the aforementioned "about", it will be understood that the particular value forms another aspect. It will be further understood that the endpoint of each range is significantly different from the other endpoint and is independent of the other endpoint.

The terms "substantial", "substantially" and variations thereof, as used in this context, are intended to indicate that the feature is equivalent or approximately equivalent to a value or description. Further, "substantially similar" is intended to indicate that the two values are the same or approximately the same. In some embodiments, "substantially similar" may indicate values that differ within about 10% of each other, such as within about 510% of each other, or within about 2% of each other.

Unless otherwise expressly stated, any method set forth in this application is in no way intended to be construed as requiring the steps to be performed in a particular order. Therefore, in the event that a method request item does not actually state an order followed by the steps of the method, or the scope of the patent application or the description does not specifically state that the steps are limited to a specific order, it is in no way intended to infer any Specific order.

Although a plurality of features, elements or steps of a particular embodiment may be disclosed by the use of the transition phrase "comprising", it will be understood that alternative embodiments are suggested that include transitional phrases "Examples of "consisting" or "consisting essentially". Thus, for example, an implied alternative embodiment of the method comprising A+B+C includes an embodiment in which the method consists of A+B+C, and the method consists essentially of A+B+C.

It will be apparent to those skilled in the art that various modifications may be made to the present disclosure without departing from the spirit and scope of the disclosure. And change. The present disclosure is to be understood as being included in the scope of the appended claims and the equivalents thereof. All content.

110‧‧‧First substrate

120‧‧‧second substrate

130‧‧‧Liquid layer

140‧‧‧Sealant

Claims (20)

A method for manufacturing a curved liquid crystal display device, the method comprising the steps of: (a) bending a display assembly about a predetermined axis to form a curved display assembly, wherein the display assembly comprises a first glass plate a second glass plate, and a liquid crystal layer disposed between the first glass plate and the second glass plate; (b) determining a stress of at least one of the first glass plate or the second glass plate Blocking; (c) determining a corrected pre-tilt retardation in the liquid crystal layer corresponding to one of at least one of the regions of the first glass sheet or the second glass sheet; and (d) the liquid crystal layer A pre-tilt block of the at least one region is adjusted to the corrected pre-tilt block. The method of claim 1 wherein the first glass sheet comprises a thin film transistor array and the second glass sheet comprises a color filter array. The method of claim 1, wherein the predetermined axis is a central longitudinal axis, a central horizontal axis, or both a central longitudinal axis and a central horizontal axis. The method of claim 1, wherein the first glass plate, the second glass plate or the first glass plate and the second glass plate are determined The stress retardation of one or more corner regions. The method of claim 4, wherein the determined stress block has an orientation of ±45 degrees. The method of claim 1, wherein the corrected pre-tilt block is determined by using the following formula: CurvedGlassRetNm=(5/18)*Pi*VApretiltDeg. The method of claim 1, wherein the pre-tilt block of at least one of the at least one corner region of the liquid crystal layer is adjusted. The method of claim 1, wherein the step of adjusting the pretilt block comprises the step of adjusting the orientation of the liquid crystal layer region, the pretilt angle, or the orientation and pretilt angle. A curved liquid crystal display device manufactured according to any one of claims 1-8. The curved liquid crystal display device of claim 9, wherein the curved liquid crystal display device is in a vertical alignment mode. A method for fabricating a curved liquid crystal display device, the method comprising the steps of: (a) determining a stress retardation of at least one region of a curved test glass sheet; and (b) determining at least one corresponding region of a liquid crystal layer Once corrected (c) adjusting a pre-tilt block of the at least one corresponding liquid crystal layer region to the corrected pre-tilt block; (d) attaching the first surface of the glass plate to the second a second surface of the glass sheet, wherein the liquid crystal layer is disposed between the first glass sheet and the second glass sheet to form a display assembly; and (e) bending the display assembly about a predetermined axis to form A curved liquid crystal display device, wherein the size, curvature axis, and radius of curvature of the test glass plate, and the composition are substantially the same as the size, curvature axis, and radius of curvature of the first glass plate and the second glass plate. The method of claim 11, wherein the stress retardation of at least one corner of the bending test glass sheet is determined. The method of claim 11, wherein the corrected pre-tilt block is determined by using the following formula: CurvedGlassRetNm=(5/18)*Pi*VApretiltDeg. The method of claim 11, wherein the step of adjusting the pre-tilt block of the at least one corresponding liquid crystal layer region comprises the step of applying an alignment layer to the first surface or the second surface, and optionally The alignment layer is rubbed in a predetermined direction to align the liquid crystal layer with a corrected pretilt angle. The method of claim 14, wherein the alignment layer comprises a polyimine. The method of claim 11, wherein the curved liquid crystal display device is in a vertical alignment mode. A method for mitigating light leakage in a curved liquid crystal display device, the method comprising the steps of: (a) determining a stress retardation in at least one region of a glass sheet in the curved display device; (b) calculating the curved display And a (c) adjusting a pre-tilt block of the at least one corresponding region of the liquid crystal layer to the modified pre-tilt block. The method of claim 17, wherein the step of adjusting the pretilt block comprises the steps of: adjusting an orientation of the liquid crystal layer region, a pretilt angle, or an orientation and a pretilt angle. The method of claim 18, further comprising the steps of: fabricating a display assembly by attaching a first surface of a glass sheet to a second surface of a second glass sheet, wherein a liquid crystal layer is disposed Between the two glass plates. The method of claim 19, further comprising the step of bending the display assembly about a predetermined axis to form a curved liquid crystal display device.