CN111061073A - Fringe field switching liquid crystal display device - Google Patents
Fringe field switching liquid crystal display device Download PDFInfo
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- CN111061073A CN111061073A CN201811208266.XA CN201811208266A CN111061073A CN 111061073 A CN111061073 A CN 111061073A CN 201811208266 A CN201811208266 A CN 201811208266A CN 111061073 A CN111061073 A CN 111061073A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/1323—Arrangements for providing a switchable viewing angle
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133606—Direct backlight including a specially adapted diffusing, scattering or light controlling members
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
- G02F1/134372—Electrodes characterised by their geometrical arrangement for fringe field switching [FFS] where the common electrode is not patterned
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Abstract
本发明提供一种边缘场切换液晶显示装置，其包括边缘场切换液晶显示模块以及背光模块。边缘场切换液晶显示模块包括边缘场切换液晶显示面板、第一偏光板以及第二偏光板。边缘场切换液晶显示面板包括多个像素电极。每一个像素电极具有多个狭缝。每一个狭缝包括第一狭缝部以及第二狭缝部。第一狭缝部与第二狭缝部彼此连接且沿不同方向延伸。第一偏光板以及第二偏光板分别设置在边缘场切换液晶显示面板的相对两表面上。第二偏光板包括相位补偿膜。第二偏光板位于边缘场切换液晶显示面板与背光模块之间。背光模块包括背光源、高级光线控制膜以及增亮膜。高级光线控制膜以及增亮膜设置在背光源的出光面上，且增亮膜与高级光线控制膜重叠。
The present invention provides an edge field switching liquid crystal display device, which includes an edge field switching liquid crystal display module and a backlight module. The edge field switching liquid crystal display module includes an edge field switching liquid crystal display panel, a first polarizing plate and a second polarizing plate. The edge field switching liquid crystal display panel includes a plurality of pixel electrodes. Each pixel electrode has a plurality of slits. Each slit includes a first slit portion and a second slit portion. The first slit portion and the second slit portion are connected to each other and extend in different directions. The first polarizing plate and the second polarizing plate are respectively arranged on two opposite surfaces of the edge field switching liquid crystal display panel. The second polarizing plate includes a phase compensation film. The second polarizing plate is located between the edge field switching liquid crystal display panel and the backlight module. The backlight module includes a backlight source, an advanced light control film and a brightness enhancement film. The advanced light control film and the brightness enhancement film are arranged on the light exit surface of the backlight source, and the brightness enhancement film overlaps with the advanced light control film.
Description
Technical Field
The present invention relates to a liquid crystal display device, and more particularly, to a fringe field switching liquid crystal display device.
Background
In order to satisfy the requirement of multiple users watching the same display device at the same time, the display device must have the characteristic of wide viewing angle (wide viewing angle). Among conventional wide viewing angle technologies, Fringe Field Switching (FFS) technology has attracted attention because of its characteristics such as low power consumption, high light transmittance, high luminance, fast response, and no color shift. However, the conventional fringe field switching technology cannot achieve both the transmittance and the viewing angle.
Disclosure of Invention
The invention provides a fringe field switching liquid crystal display device which can give consideration to both light transmittance and visual angle.
According to an embodiment of the invention, a fringe field switching liquid crystal display device comprises a fringe field switching liquid crystal display module and a backlight module. The fringe field switching liquid crystal display module comprises a fringe field switching liquid crystal display panel, a first polarizing plate and a second polarizing plate. The fringe field switching liquid crystal display panel includes a plurality of pixel electrodes. Each pixel electrode has a plurality of slits. Each slit includes a first slit portion and a second slit portion. The first slit portion and the second slit portion are connected to each other and extend in different directions. The first polarizing plate is disposed on a first surface of the fringe field switching liquid crystal display panel. The second polarizing plate is disposed on the second surface of the fringe field switching liquid crystal display panel. The second surface and the first surface are opposite to each other. The second polarizing plate includes a phase compensation film. The second polarizing plate is positioned between the fringe field switching liquid crystal display panel and the backlight module. The backlight module includes a backlight, an Advanced Light Control Film (ALCF), and a Brightness Enhancement Film (BEF). The high-grade light control film and the brightness enhancement film are arranged on the light emergent surface of the backlight source, and the brightness enhancement film is overlapped with the high-grade light control film.
In the fringe field switching liquid crystal display device according to the embodiment of the present invention, the fringe field switching liquid crystal display device has a wide viewing angle in the first direction and a reverse direction of the first direction. An included angle between the extending direction of the first slit part and the first direction is in a range of 150 degrees to 180 degrees, and an included angle between the extending direction of the second slit part and the opposite direction of the first direction is in a range of 150 degrees to 180 degrees.
In the fringe field switching liquid crystal display device according to the embodiment of the present invention, the first transmission axis of the first polarizing plate is perpendicular to the second transmission axis of the second polarizing plate.
In the fringe field switching liquid crystal display device according to the embodiment of the present invention, the phase difference provided by the phase compensation film falls within the range of 190nm to 350 nm.
In the fringe field switching liquid crystal display device according to the embodiment of the present invention, the fringe field switching liquid crystal display device has a wide viewing angle in the first direction and a reverse direction of the first direction. The angle between the direction of extension of the louver structure in the advanced light control film and the first direction falls within the range of 1 degree to 45 degrees.
In the fringe field switching liquid crystal display device according to the embodiment of the present invention, the fringe field switching liquid crystal display device has a wide viewing angle in the first direction and a reverse direction of the first direction. An included angle between an extending direction of the strip-shaped prisms in the brightness enhancement film and the first direction is in a range of 0 degrees to 45 degrees.
In the fringe field switching liquid crystal display device according to the embodiment of the present invention, an angle between an extending direction of the louver structure in the advanced light controlling film and an extending direction of the stripe-shaped prism in the brightness enhancing film falls within a range of 1 degree to 10 degrees.
In the fringe field switching liquid crystal display device according to the embodiment of the present invention, the fringe field switching liquid crystal display device is a display device for a vehicle.
In view of the above, in the fringe field switching liquid crystal display device according to the embodiment of the present invention, the distribution and/or light shape of the light beam output from the fringe field switching liquid crystal display device is adjusted by controlling the arrangement of each pixel electrode in combination with the arrangement of the phase compensation film, the advanced light control film, and the brightness enhancement film. Therefore, the fringe field switching liquid crystal display device of the embodiment of the invention can have ideal light transmittance and viewing angle.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a schematic cross-sectional view of a fringe field switching liquid crystal display device according to an embodiment of the present invention;
FIG. 2 is a schematic top view of the fringe field switching LCD panel of FIG. 1;
FIG. 3 is an enlarged schematic top view of the pixel electrode of FIG. 2;
FIG. 4 is a schematic partial side view of a louver construction of the advanced light control film of FIG. 1;
FIG. 5 is a schematic side view of a portion of a strip prism in the brightness enhancement film of FIG. 1.
Detailed Description
The directional terminology used in the description of the embodiments includes, for example: "upper", "lower", "front", "rear", "left", "right", etc., refer only to the orientation of the figures. Accordingly, the directional terminology is used for purposes of illustration and is in no way limiting. In the drawings, the general characteristics of methods, structures and/or materials used in certain exemplary embodiments are shown in the various figures. These drawings, however, should not be construed as limiting or restricting the scope or nature covered by these exemplary embodiments. For example, the relative thicknesses and locations of various layers, regions and/or structures may be reduced or exaggerated for clarity.
In the detailed description, the same or similar elements will be denoted by the same or similar reference numerals, and the detailed description thereof will be omitted. Furthermore, features from different exemplary embodiments may be combined with each other without conflict and equivalent variations and modifications made in the present specification or claims may still fall within the scope of the present patent. In addition, the terms "first", "second", and the like in the description or the claims are only used for naming discrete (discrete) elements or distinguishing different embodiments or ranges, and are not used for limiting the upper limit or the lower limit of the number of elements, nor for limiting the manufacturing order or the arrangement order of the elements.
Fig. 1 is a schematic cross-sectional view of a fringe field switching liquid crystal display device 1 according to an embodiment of the present invention. Referring to fig. 1, a fringe field switching liquid crystal display device 1 includes a fringe field switching liquid crystal display module 10 and a backlight module 12. The fringe field switching liquid crystal display module 10 is disposed on the backlight module 12, and the fringe field switching liquid crystal display module 10 includes a fringe field switching liquid crystal display panel 100, a first polarizing plate 102, and a second polarizing plate 104.
Fig. 2 is a schematic top view of the fringe field switching lcd panel 100 of fig. 1. Referring to fig. 2, the fringe field switching liquid crystal display panel 100 includes a plurality of pixel electrodes PE. These pixel electrodes PE are arranged in the display area a1 of the fringe field switching liquid crystal display panel 100 for displaying an image. The peripheral region a2 of the fringe field switching liquid crystal display panel 100 is located at the periphery of the display region a 1. As shown in fig. 2, the pixel electrodes PE may be arranged in a matrix along a first direction D1 and a second direction D2 perpendicular to the first direction D1, and each pixel P (fig. 2 shows the area where a plurality of pixels P are located in dotted lines) of the fringe field switching liquid crystal display panel 100 includes one pixel electrode PE. However, the number and arrangement of the pixels P and/or the number of the pixel electrodes PE in each pixel P may be changed according to the requirement, and is not limited to the one shown in fig. 2.
Fig. 3 is an enlarged schematic top view of the pixel electrode PE in fig. 2. Referring to fig. 2 and 3, each pixel electrode PE has a plurality of slits ST. Each slit ST includes a first slit portion ST1 and a second slit portion ST 2. The first and second slit portions ST1 and ST2 are connected to each other and extend in different directions. As shown in fig. 2 and 3, the first slit portion ST1 and the second slit portion ST2 in each slit ST are aligned, for example, along the first direction D1. In addition, the slits ST in each of the pixel electrodes PE are arranged, for example, in the second direction D2. However, the number of slits ST in each pixel electrode PE and the pattern of each slit ST may be changed as required, and is not limited to that shown in fig. 2 and 3.
In fig. 2, for clearly showing the shapes and the distributions of the pixel electrodes PE, the pixel electrodes PE are shown by solid lines, and the remaining film layers and/or elements of the fringe field switching liquid crystal display panel 100 are omitted. However, the fringe field switching liquid crystal display panel 100 may further include other layers and/or devices, such as a plurality of substrates, a plurality of scan lines, a plurality of data lines, a plurality of active devices, a plurality of common electrodes, a plurality of insulating layers, a liquid crystal layer, a plurality of alignment layers, a color filter layer, a black matrix layer, etc., and the materials, structures, and arrangements of the above devices may be designed according to the prior art, which will not be described herein.
Referring to fig. 1 again, the first polarizing plate 102 is disposed on the first surface S1 of the fringe field switching liquid crystal display panel 100. The second polarizing plate 104 is disposed on the second surface S2 of the fringe field switching liquid crystal display panel 100. The second surface S2 and the first surface S1 are opposite to each other. In other words, the first polarizing plate 102 and the second polarizing plate 104 are respectively disposed on two opposite surfaces of the fringe field switching liquid crystal display panel 100.
The first polarizer 102 has a first transmission axis T102. The second polarizing plate 104 has a second transmission axis T104. The first transmission axis T102 of the first polarizing plate 102 may be perpendicular to the second transmission axis T104 of the second polarizing plate 104. For example, the first transmission axis T102 of the first polarizer 102 is parallel to the first direction D1 and the opposite direction D1', and the second transmission axis T104 of the second polarizer 104 is parallel to the second direction D2 and the opposite direction (not shown), but the invention is not limited thereto.
The second polarizer 104 is disposed between the fringe field switching liquid crystal display panel 100 and the backlight module 12, and the second polarizer 104 includes a phase compensation film 1040. The phase compensation film 1040 is adapted to provide a phase difference to compensate for light leakage generated by the liquid crystal molecules during driving. The material and structure of the phase compensation film 1040 may be designed according to the prior art. For example, the phase compensation film 1040 may be a Cellulose Triacetate (TAC) film, but is not limited thereto.
The backlight module 12 includes a backlight 120, an advanced light management film 122, and a brightness enhancement film 124. The backlight 120 is adapted to provide a light beam B for display. The backlight 120 may be a side-entry backlight, and the side-entry backlight may be designed according to the prior art, which is not described herein.
The advanced light management film 122 and the brightness enhancement film 124 are disposed on the light exit surface SO of the backlight 120, and the brightness enhancement film 124 overlaps the advanced light management film 122. In the embodiment, the brightness enhancement film 124 is located between the advanced light management film 122 and the backlight 120, but the invention is not limited thereto.
FIG. 4 is a schematic partial side view of louver structure 1220 of the advanced light control film 122 of FIG. 1. Referring to fig. 4, the louver structure 1220 of the advanced light management film 122 is adapted to adjust the distribution of the light beam B that is directed perpendicularly (e.g., from the brightness enhancement film 124 to the advanced light management film 122 of fig. 1) to the louver structure 1220, which, in addition to contributing to an increased viewing angle range, may also result in a more concentrated light beam B. It should be noted that the advanced light control film 122 may include other film layers in addition to the louver structure 1220, as desired.
FIG. 5 is a schematic side view of a portion of strip prisms 1240 in brightness enhancement film 124 of FIG. 1. Referring to fig. 5, strip prisms 1240 in brightness enhancement film 124 are adapted to adjust the distribution of light beam B that is directed perpendicularly to strip prisms 1240 (e.g., from backlight 120 to brightness enhancement film 124 in fig. 1), which, in addition to contributing to an increased range of viewing angles, can also result in a more concentrated light beam B.
The backlight module 12 may further include other elements and/or film layers according to different requirements. For example, the backlight module 12 may further include an adhesive layer and/or a fixing mechanism for fixing the above components, but not limited thereto.
In the fringe field switching liquid crystal display device 1, the distribution and/or the light shape of the light beam B output from the fringe field switching liquid crystal display device 1 are adjusted by controlling the arrangement of each pixel electrode PE in combination with the arrangement of the phase compensation film 1040, the advanced light controlling film 122, and the brightness enhancing film 124. Therefore, the fringe field switching liquid crystal display device 1 can have a desirable light transmittance and viewing angle.
In detail, the wide viewing angle direction of the fringe field switching liquid crystal display device 1 can be determined by the arrangement manner of the pixel electrodes PE (e.g., the extending direction of the slits ST). Therefore, the arrangement of the pixel electrode PE can be designed based on the application range of the fringe field switching liquid crystal display device 1. In addition, the light leakage can be improved by the arrangement of the phase compensation film 1040, and the viewing angle range can be increased and the concentrated brightness enhancement effect can be achieved by the arrangement of the advanced light control film 122 and the brightness enhancement film 124.
For example, if the fringe field switching liquid crystal display device 1 is used as a display device for a vehicle, such as a head-up display or an electronic rear view mirror, the fringe field switching liquid crystal display device 1 preferably has a wide viewing angle in the lateral direction (the first direction D1 and the reverse direction D1 ' of the first direction D1) so that a user sitting in the driver's seat and the passenger's seat can view the fringe field switching liquid crystal display device 1 at the same time. Under this architecture, the pixel electrode PE is disposed in a lateral direction. Correspondingly, each slit ST also exhibits a transverse arrangement. As shown in fig. 3, an angle between the first slit portion ST1 and the first direction D1 (e.g., an angle θ 1 between the extending direction DST1 of the first slit portion ST1 and the first direction D1) falls within a range of 150 degrees to 180 degrees, and an angle between the second slit portion ST2 and the opposite direction D1 'of the first direction D1 (e.g., an angle θ 2 between the extending direction DST2 of the second slit portion ST2 and the opposite direction D1' of the first direction D1) falls within a range of 150 degrees to 180 degrees. In addition, the phase compensation film 1040 provides a phase difference falling within the range of 190nm to 350 nm. In addition, as shown in fig. 4, an angle θ 3 between the extending direction D1220 of the louver structures 1220 in the advanced light controlling film 122 and the first direction D1 falls within a range of 1 degree to 45 degrees. As shown in fig. 5, the angle θ 4 between the extending direction D1240 of the strip prisms 1240 in brightness enhancing film 124 and the first direction D1 falls within the range of 0 degrees to 45 degrees. Furthermore, the angle (not shown) between the direction D1220 in which louver structures 1220 in advanced light management film 122 extend and the direction D1240 in which stripe prisms 1240 in brightness enhancement film 124 extend falls within the range of 1 degree to 10 degrees.
Table one shows the structural differences of comparative examples 1 to 5. Tables two to six show the contrast ratios of comparative examples 1 to 5, respectively. Referring to table one, comparative examples 1 to 3 did not adopt the design of the above-mentioned embodiment of the present invention, while comparative examples 4 and 5 adopted the design of the above-mentioned embodiment of the present invention.
In table one, "the pixel electrode is disposed in a" horizontal direction "means that the pixel electrode is disposed as shown in fig. 2, and" the pixel electrode is disposed in a "vertical direction" means that the pixel electrode is rotated by 90 degrees from the arrangement shown in fig. 2. In addition, "the phase compensation film" is "none" means that the second polarizing plate has no phase compensation film, and "the phase compensation film" is "present" means that the second polarizing plate has a phase compensation film. In addition, "ALCF + BEF" is "none" means that the backlight module adopts a general design, and "ALCF + BEF" is "presence" means that the backlight module adopts an advanced light control film in combination with a brightness enhancement film. In comparative example 4, the included angles θ 1 and θ 2 fall within the range of 170 degrees to 173 degrees, the retardation is 270nm, the included angle θ 3 is 5 degrees, and the included angle θ 4 is 0 degree. In comparative example 5, the included angles θ 1 and θ 2 were 173 degrees, the phase difference was 270nm, the included angle θ 3 was 5 degrees, and the included angle θ 4 was 0 degree.
In tables two to six, "lateral angle" refers to a viewing angle in the lateral direction (i.e., the first direction D1 and the opposite direction D1' in fig. 2), and "longitudinal angle" refers to a viewing angle in the longitudinal direction (i.e., the second direction D2 and the opposite direction in fig. 2), wherein the larger the absolute value of the lateral angle and/or the longitudinal angle is, the farther the user is from the center of the fringe field switching liquid crystal display device. In addition, the lateral angle (or the longitudinal angle) is positive, which represents that the user deviates from the center of the fringe field switching liquid crystal display device in the first direction D1 (or the second direction D2); and the lateral angle (or the longitudinal angle) is negative, which represents that the user is deviated from the center of the fringe field switching liquid crystal display device in the opposite direction of the first direction D1 (or in the opposite direction of the second direction D2).
For the Original Equipment Manufacturing (OEM) specification for general vehicles, the minimum contrast ratio in the range of-4 to +8 degrees of the transverse angle ± 10 degrees and the longitudinal angle (i.e., the range from the bold line frame in tables two to six) needs to be greater than 1200; the minimum contrast ratio in the range of the transverse angle of +/-40 degrees and the longitudinal angle of-10 degrees to +20 degrees (i.e. the range from the second thick line frame in tables two to six) needs to be more than 650; and the minimum contrast ratio in the range of the transverse angle + -50 degrees and the longitudinal angle-10 degrees to +20 degrees (i.e., the range from the third thick line frame in tables two to six) needs to be greater than 350. Tables two to six show the contrast ratios which do not satisfy the above specifications in bold. As can be seen from tables two to six, comparative examples 4 and 5 using the design of the above-described embodiment of the present invention have better light transmittance and viewing angle than comparative examples 1 to 3 using no design of the above-described embodiment of the present invention.
| Comparative example | Arrangement mode of pixel electrode | Phase compensation film | ALCF+ |
| 1 | Transverse direction | Is free of | Is free of |
| 2 | Longitudinal direction | Is provided with | Is free of |
| 3 | Transverse direction | Is provided with | Is free of |
| 4 | Transverse direction | Is provided with | Is provided with |
| 5 | Transverse direction | Is provided with | Is provided with |
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Watch five
Watch six
In summary, in the fringe field switching liquid crystal display device according to the embodiments of the present invention, the distribution and/or the light shape of the light beam output from the fringe field switching liquid crystal display device are adjusted by controlling the arrangement of each pixel electrode and the arrangement of the phase compensation film, the advanced light control film, and the brightness enhancement film. Therefore, the fringe field switching liquid crystal display device of the embodiment of the invention can have ideal light transmittance and viewing angle. In an embodiment, an angle between the extending direction of the first slit portion and the first direction, an angle between the extending direction of the second slit portion and the opposite direction of the first direction, a phase difference provided by the phase compensation film, an angle between the extending direction of the louver structure in the advanced light control film and the first direction, an angle between the extending direction of the stripe prism in the brightness enhancement film and the first direction, and/or an absolute value of an angle between the extending direction of the louver structure in the advanced light control film and the extending direction of the stripe prism in the brightness enhancement film may be further adjusted to further improve the light transmittance and the viewing angle.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A fringe field switching liquid crystal display device, comprising:
a fringe field switching liquid crystal display module comprising:
a fringe field switching liquid crystal display panel including a plurality of pixel electrodes, wherein each pixel electrode has a plurality of slits, each slit includes a first slit portion and a second slit portion, and the first slit portion and the second slit portion are connected to each other and extend in different directions;
a first polarizing plate disposed on a first surface of the fringe field switching liquid crystal display panel; and
a second polarizing plate disposed on a second surface of the fringe field switching liquid crystal display panel, the second surface and the first surface being opposite to each other, wherein the second polarizing plate includes a phase compensation film; and
a backlight module, wherein the second polarizer is located between the fringe field switching liquid crystal display panel and the backlight module, and the backlight module comprises:
a backlight source;
the high-grade light control film is arranged on the light emitting surface of the backlight source; and
and the brightness enhancement film is arranged on the light emergent surface of the backlight source and is overlapped with the high-grade light control film.
2. The fringe field switching liquid crystal display device of claim 1, wherein the fringe field switching liquid crystal display device has a wide viewing angle in a first direction and a direction opposite to the first direction, an angle between an extending direction of the first slit portion and the first direction falls within a range of 150 degrees to 180 degrees, and an angle between an extending direction of the second slit portion and the direction opposite to the first direction falls within a range of 150 degrees to 180 degrees.
3. The fringe field switching liquid crystal display device of claim 1, wherein a first transmission axis of the first polarizing plate is perpendicular to a second transmission axis of the second polarizing plate.
4. The fringe field switching liquid crystal display device of claim 1, wherein the phase compensation film provides a phase difference falling within a range of 190nm to 350 nm.
5. The fringe field switching liquid crystal display device of claim 1, wherein the fringe field switching liquid crystal display device has a wide viewing angle in a first direction and a direction opposite to the first direction, and an angle between an extending direction of the louver structure in the advanced light control film and the first direction falls within a range of 1 degree to 45 degrees.
6. The fringe field switching liquid crystal display device of claim 1, wherein the fringe field switching liquid crystal display device has a wide viewing angle in a first direction and a direction opposite to the first direction, and an included angle between an extending direction of the stripe prisms in the brightness enhancement film and the first direction falls within a range of 0 degrees to 45 degrees.
7. The fringe field switching liquid crystal display device of claim 1, wherein an included angle between an extending direction of the louver structure in the advanced light controlling film and an extending direction of the stripe prisms in the brightness enhancing film is in a range of 1 degree to 10 degrees.
8. The fringe field switching liquid crystal display device of claim 1, wherein the fringe field switching liquid crystal display device is a vehicular display device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811208266.XA CN111061073A (en) | 2018-10-17 | 2018-10-17 | Fringe field switching liquid crystal display device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811208266.XA CN111061073A (en) | 2018-10-17 | 2018-10-17 | Fringe field switching liquid crystal display device |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619394A (en) * | 2003-11-19 | 2005-05-25 | 株式会社日立显示器 | Liquid crystal display device |
| CN103777402A (en) * | 2012-10-24 | 2014-05-07 | 乐金显示有限公司 | Liquid crystal display device |
| CN206301060U (en) * | 2017-01-03 | 2017-07-04 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
-
2018
- 2018-10-17 CN CN201811208266.XA patent/CN111061073A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1619394A (en) * | 2003-11-19 | 2005-05-25 | 株式会社日立显示器 | Liquid crystal display device |
| CN103777402A (en) * | 2012-10-24 | 2014-05-07 | 乐金显示有限公司 | Liquid crystal display device |
| CN206301060U (en) * | 2017-01-03 | 2017-07-04 | 京东方科技集团股份有限公司 | A kind of backlight module and display device |
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