CN108490681B - Color gamut widening device for liquid crystal material - Google Patents
Color gamut widening device for liquid crystal material Download PDFInfo
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- CN108490681B CN108490681B CN201810734551.9A CN201810734551A CN108490681B CN 108490681 B CN108490681 B CN 108490681B CN 201810734551 A CN201810734551 A CN 201810734551A CN 108490681 B CN108490681 B CN 108490681B
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 92
- 239000000463 material Substances 0.000 title claims abstract description 34
- 230000010287 polarization Effects 0.000 claims abstract description 15
- 230000005540 biological transmission Effects 0.000 claims abstract description 11
- 239000002184 metal Substances 0.000 claims description 8
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 description 24
- 238000010586 diagram Methods 0.000 description 17
- 239000002096 quantum dot Substances 0.000 description 14
- 238000000411 transmission spectrum Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 7
- 230000003287 optical effect Effects 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 239000000758 substrate Substances 0.000 description 6
- 239000011521 glass Substances 0.000 description 4
- 238000002834 transmittance Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 3
- 239000003086 colorant Substances 0.000 description 3
- 238000001228 spectrum Methods 0.000 description 3
- UWCWUCKPEYNDNV-LBPRGKRZSA-N 2,6-dimethyl-n-[[(2s)-pyrrolidin-2-yl]methyl]aniline Chemical compound CC1=CC=CC(C)=C1NC[C@H]1NCCC1 UWCWUCKPEYNDNV-LBPRGKRZSA-N 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
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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
- G02F1/133528—Polarisers
-
- 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
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
-
- 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
- G02F1/133528—Polarisers
- G02F1/133531—Polarisers characterised by the arrangement of polariser or analyser axes
-
- 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
- G02F1/133528—Polarisers
- G02F1/133548—Wire-grid polarisers
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Polarising Elements (AREA)
Abstract
The invention relates to a liquid crystal material color gamut widening device, which comprises the following components: in the light path direction, a polarizing device, a first liquid crystal layer, a second liquid crystal layer and a polarization analyzer are sequentially arranged in parallel; wherein the light transmission axis direction of the polarizing device is 0 degrees; under this reference: the alignment angle of liquid crystal molecules in the first liquid crystal layer is 0 DEG, and the twist angle of the liquid crystal molecules is 720 DEG; the alignment angle of the liquid crystal molecules in the second liquid crystal layer is 0 degrees, and the twist angle of the liquid crystal molecules is 720 degrees. The device has simpler structure and no viewing angle problem on the premise of realizing the same color gamut widening effect, and is a more excellent color gamut widening device.
Description
Technical Field
The invention relates to a color gamut widening device composed of a liquid crystal material and a polarizing device, which can be applied to display devices and light source spectrum regulation.
Background
In recent years, a high-color-gamut light source becomes a hot spot for research, the color gamut of the light source depends on the light emission quality of the light source, including the position of the light emission peak in the spectrum and the full width at half maximum of the light emission peak, the position of the light emission peak determines the color of the color, the closer the position of the light emission peak is to the wavelength range of the three primary colors of red, green and blue, the better the color rendering property of the light source is, the full width at half maximum of the light emission peak determines the purity of the color, the narrower the full width at half maximum of the light emission peak is, the purer the color is, and the color gamut of the light source is wider.
The existing wide color gamut light source technology can be divided into two kinds, one is a light source technology represented by an electroluminescent diode technology with good monochromatic light performance, the light emitting effect of the light source technology is completely dependent on the light source, and the light source technology is high in price; another is a backlight color gamut widening method represented by a photo-quantum dot light emitting technology, and the light emitting effect thereof depends on the absorption or reflection of light of a specified wavelength by a color gamut widening device. In the backlight color gamut widening method, the existing photoinduced quantum dot light emitting technology (such as Chinese patent No.201610915843.3 with the name of quantum dot color filters and display devices comprising quantum dot color filters) which takes a quantum dot film as a color gamut widening device is included, blue light is used for exciting green and red quantum dot materials, and the emission of red, green and blue light is realized; or a technique using a color notch filter as a color gamut widening device (chinese patent No.201280041032.5 entitled "high dynamic range display with wide color gamut and energy efficiency"), the color notch filter being used to control white light of a light source so that light of a partial color cannot pass therethrough to achieve color gamut widening; or a technology (published paper titled "Enlarging the color gamut of liquid crystal displays with a functional reflective polarizer", journal Optics Express, vol.25,102-111,2017) of using a functional reflective polarizer as a color gamut widening device, wherein the functional reflective polarizer is used for realizing polarized light and simultaneously totally reflecting partial wavelength light, so that the emergent light lacks partial wavelength light, and a wide color gamut is realized; and the color gamut widening technology (the invention name is Chinese patent No.201810017963.0 of a color gamut widening device) for modulating polarized light through a wave plate and a polaroid, which is proposed by the inventor before, uses the polaroid and the wave plate to modulate the polarized light, so as to form a specific light transmission effect and realize color gamut widening. The technologies are all the technologies of combining a color gamut widening device with a light source to generate a wide color gamut light source, in which the light-induced quantum dot light emitting technology is the only technology applied in practice, and can achieve the light emitting effect of the maximum 110% NTSC color gamut standard, but the color notch filter and the function reflection polaroid technology still face high manufacturing cost (about 2 times of a common display) due to the material characteristics, so that the color gamut of the light source can be further improved to 120% NTSC color gamut standard theoretically, but the color gamut widening device comprises a huge number of complex structures in nanometer size and other electronic devices matched with the complex structures, so that the production difficulty and the structure complexity of the color gamut widening technology for modulating polarized light through a wave plate and a polaroid reach quite high level, so that the practical application is not achieved yet, and the color gamut widening technology for modulating polarized light through the wave plate and the polaroid has a certain defect in view angle due to short extraction time.
Disclosure of Invention
The invention aims to solve the problems of high preparation difficulty, complex structure and high cost of the existing wide-color-gamut light source, and provides a liquid crystal material color gamut widening device. The device realizes the regulation and control of polarized light with different wavelengths by utilizing a combined twisted liquid crystal layer structure, namely, a polarizing device, a plurality of liquid crystal layers and an analyzer are sequentially arranged in parallel according to a certain angle to form an optical system, the phase retarders arranged according to the invention have different effects on the polarized light with different wavelengths, and the final transmitted light only has high transmittance in a specific wavelength range, so that the effect of a wide color gamut light source is realized.
The technical scheme of the invention is as follows:
a liquid crystal material color gamut widening device, the device comprising: in the light path direction, a polarizing device, a first liquid crystal layer, a second liquid crystal layer and a polarization analyzer are sequentially arranged in parallel;
wherein the light transmission axis direction of the polarizing device is 0 degrees; under this reference:
the alignment angle of liquid crystal molecules in the first liquid crystal layer is 0 DEG, and the twist angle of the liquid crystal molecules is 720 DEG;
the alignment angle of the liquid crystal molecules in the second liquid crystal layer is 0 degrees, and the twist angle of the liquid crystal molecules is 720 degrees.
The polarizing device is an absorption type polarizer, a polarization selector, a metal wire grid or a reflection type polarizer;
the polarization analyzer is an absorption type polarizer, a polarization selector, a metal wire grid or a reflection type polarizer;
the thickness of the liquid crystal layer is between 5 micrometers and 30 micrometers;
the first liquid crystal layer and the second liquid crystal layer in the device are arranged in a forward direction or a reverse direction in sequence;
the parts in the device can be all arranged in forward or reverse order;
the invention has the substantial characteristics that:
in the invention, the regulation and control of polarized light with different wavelengths are realized by combining twisted liquid crystal layer structures for the first time. Compared with the color gamut widening device for regulating polarized light through the wave plate, the color gamut widening device provided by the invention depends on the optical rotation effect of the liquid crystal layer, the wave plate structure depends on the deflection of the wave plate on the polarized light, and the two devices are completely different in optical principle.
Compared with the existing wide-color-gamut light source technology, the invention does not depend on special materials such as quantum dots and the like for realizing the wide color gamut; the common polaroid and liquid crystal material are adopted for each structure, the manufacturing precision is in the micron order, and the common polaroid and liquid crystal material have general performance with the materials used by the existing liquid crystal display device, so the production difficulty required by the structure is low; the realization of the device function only depends on the optical structure, the combination with the light source is simple, and the requirement of the application environment is reduced. The invention can realize the light source effect with wide color gamut through easier manufacturing process.
The beneficial effects of the invention are as follows:
compared with the existing quantum dot technology, the realization of the high light source color gamut does not depend on special materials and complex microstructures, the process production difficulty is reduced, meanwhile, compared with the quantum dot technology, the quantum dot technology is little restricted by the use environment, the quantum dot technology can be applied to all existing display devices, and the materials used in the quantum dot technology can be common liquid crystal materials, so that the service life is unlimited; the device of the invention can be directly attached to the outside of a light source or a display for use, so that the process production is very easy. The device has simple optical structure and simple combination with the light source, can be placed at the outermost side of the display, can be placed in a backlight module of the liquid crystal display, and can also be directly placed at the front end of a light-emitting component of the LED backlight source to directly regulate and control the wave band of emitted light. Compared with other existing optical structure technologies, the invention can realize the color gamut widening effect under the existing process conditions. The device can realize the color gamut of more than 120% NTSC, which is much larger than the color gamut of 110% NTSC at the highest of the quantum dot film, and can realize better wide color gamut effect by lower cost.
Drawings
FIG. 1 is a cross-sectional view of a light source or display screen and liquid crystal material color gamut widening device;
FIG. 2 is a block diagram of four types of polarizing devices; wherein, fig. 2 (a) is a structural diagram of a general polarizer, fig. 2 (b) is a structural diagram of a polarization selector, fig. 2 (c) is a structural diagram of a metal wire grid, and fig. 2 (d) is a structural diagram of a reflective polarizer;
FIG. 3 is a block diagram of the apparatus in example 1; fig. 3 (a) is a device structure diagram, fig. 3 (b) is a transmission spectrum diagram, and fig. 3 (c) is a color gamut diagram.
Fig. 4 is a transmission spectrum and a color gamut diagram of the liquid crystal material color gamut widening device in embodiment 2; FIG. 4a is a transmission spectrum; fig. 4b is a color gamut diagram.
Fig. 5 is a transmission spectrum and a color gamut diagram of the liquid crystal material color gamut widening device in embodiment 3; FIG. 5a is a transmission spectrum; fig. 5b is a color gamut diagram.
Fig. 6 is a transmission spectrum and a color gamut diagram of the liquid crystal material color gamut widening device in embodiment 2; FIG. 6a is a transmission spectrum; fig. 6b is a color gamut diagram.
Detailed Description
As shown in fig. 1, the color gamut widening device can be used for various light source devices to adjust the spectral characteristics emitted by the light source and widen the color gamut of the light source; or for various display devices to widen the display gamut of a display. The color gamut widening device is arranged on a light source or a display screen, and comprises a polarizing device 1, a first liquid crystal layer 2, a second liquid crystal layer 3, an polarization analyzer 4 from bottom to top, wherein the transmission axis of the polarizing device 1 is perpendicular to the transmission axis of the polarization analyzer 3. The alignment direction of the liquid crystal molecules in the first liquid crystal layer is 0 degree, the twist angle is 720 degrees, the left hand rotation is performed, the alignment angle of the liquid crystal molecules in the second liquid crystal layer is 0 degree, the twist angle is 720 degrees, and the right hand rotation is performed. The liquid crystal materials specifically used in the following examples in the invention are all 5CB, and the light sources are all full spectrum light sources.
FIG. 2 shows four types of polarizing devices 1 used in the present device; FIG. 2 (a) shows a conventional polarizer 11, which, when natural light is transmitted, transmits polarized light parallel to the transmission axis of the polarizer, absorbs polarized light perpendicular to the transmission axis of the polarizer, and may be an external polarizer of the display itself; fig. 2 (b) shows the polarization selector 12, which transmits polarized light parallel to the incident surface 121 and reflects polarized light perpendicular to the incident surface; FIG. 2 (c) shows a metal wire grid 13 transmitting polarized light perpendicular to metal wires 131 and reflecting polarized light parallel to the metal wires; fig. 2 (d) shows a reflective polarizer 14, which comprises an optically anisotropic film layer 141 and an optically isotropic film layer 142, wherein one of the two refractive indices of the optically anisotropic film is equal to that of the optically isotropic film, and the transmitted polarized light is polarized light in the direction of the same refractive index, and the polarized light in the other direction is reflected. All the reflected polarized light can be reflected back through the reflector in the light source or the display backlight module for use. The polarization analyzer is generally an absorptive polarizer. The ideal polarizer is used in the invention, and the above various polarizing devices and polarizing analyzer are the ultimate optical characteristics without considering the reuse of reflected light, namely the characteristics of the ideal polarizer: the linear polarized light in one direction is transmitted, and the linear polarized light in the other direction is absorbed.
The feature of the present invention to achieve color gamut widening is further described below with reference to the drawings.
In the case of example 1,
as shown in fig. 3 (a), a structure diagram of a color gamut widening device of a liquid crystal material is shown, the polarizing device 1 uses a polarizer, the transmission axis angle is 0 degrees, under this reference, the first liquid crystal layer 21 adopts a liquid crystal box structure, which includes a glass substrate 211, an alignment layer (the materials of the alignment layers are all polyimide) 212, a liquid crystal layer 213, an alignment layer 214, a glass substrate 215, the alignment directions of the liquid crystal molecules at the two substrates are all 0 degrees, the left turn twist of the liquid crystal molecules is performed by adding a chiral agent, the twist angle is 720 degrees, the liquid crystal material uses 5CB liquid crystal, the thickness of the liquid crystal layer is set to 13.5 micrometers (i.e., the thickness of the liquid crystal layer), the second liquid crystal layer 31 adopts a liquid crystal box structure, which includes a glass substrate 311, an alignment layer 312, a liquid crystal layer 313, an alignment layer 314, a glass substrate 315, the alignment directions of the liquid crystal molecules at the two substrates are all 0 degrees, the right turn twist of the liquid crystal molecules is performed by adding a chiral agent, the twist angle is 720 degrees, the liquid crystal material uses 5CB liquid crystal, the thickness of the liquid crystal layer is set to 13.5 micrometers, and the thickness of the polarizing device 4 uses the transmission axis direction is 90 degrees.
Fig. 3 (b) is a transmittance spectrum of the color gamut widening device of a liquid crystal material, in which a transmittance peak with a very narrow full width at half maximum is provided at a wavelength position corresponding to three primary colors of red, green and blue, and colors of a light source are purified, so that a color gamut of a display can be effectively widened, and fig. 3 (c) is a color gamut diagram obtained when the color gamut widening device of the liquid crystal material is combined with a KSF-LED backlight LCD panel, and a color gamut coverage area is 120.9% ntsc.
In the case of example 2,
the other structure of the device in this embodiment is the same as that in the first embodiment, except that the twist angle of the liquid crystal molecules in the first liquid crystal layer and the second liquid crystal layer is changed to 540 degrees, and the twist direction is still the left-handed direction of the first liquid crystal layer and the right-handed direction of the second liquid crystal layer.
Fig. 4 (a) shows the transmittance spectrum of the liquid crystal material color gamut widening device, in which there is no significant transmittance peak and the color gamut widening effect is poor, and fig. 4 (b) shows the color gamut obtained when the liquid crystal material color gamut widening device is combined with a KSF-LED backlight LCD panel, with a color gamut coverage area of 104.2% ntsc.
In the case of example 3,
the other structure of the device in this embodiment is the same as that in the first embodiment, except that the direction of the light transmission axis of the polarization analyzer is changed to 0 degree.
Fig. 5 (a) shows the transmittance spectrum of the liquid crystal material color gamut widening device, from which it can be seen that the device has no color gamut enhancing effect, but rather reduces the color gamut of the display, and fig. 5 (b) shows the color gamut obtained when the liquid crystal material color gamut widening device is combined with a KSF-LED backlight LCD panel, with a color gamut coverage area of 82.4% ntsc.
In the case of example 4,
the other structure of the device in this embodiment is the same as that in the first embodiment, except that the twist direction of the liquid crystal molecules in the second liquid crystal layer is changed from right-handed to left-handed.
Fig. 6 (a) shows the transmittance spectrum of the liquid crystal material color gamut widening device, in which there is no significant transmittance peak, and no color gamut enhancing effect, and fig. 6 (b) shows the color gamut obtained when the liquid crystal material color gamut widening device is combined with a KSF-LED backlight LCD panel, with a color gamut coverage area of 95.7% ntsc.
Other configurations that use combinations of two or more embodiments to achieve a widening of the color gamut using the basic structure of the present patent fall within the scope of the present patent.
The invention is not a matter of the known technology.
Claims (2)
1. The liquid crystal material color gamut widening device is characterized by comprising the following components: in the light path direction, a polarizing device, a first liquid crystal layer, a second liquid crystal layer and a polarization analyzer are sequentially arranged in parallel;
wherein the light transmission axis direction of the polarizing device is 0 degrees; under this reference:
the alignment angle of liquid crystal molecules in the first liquid crystal layer is 0 DEG, and the twist angle of the liquid crystal molecules is 720 DEG;
the alignment angle of liquid crystal molecules in the second liquid crystal layer is 0 DEG, and the twist angle of the liquid crystal molecules is 720 DEG;
the polarizing device is an absorption type polarizer, a polarization selector, a metal wire grid or a reflection type polarizer;
the polarization analyzer is an absorption type polarizer, a polarization selector, a metal wire grid or a reflection type polarizer;
the thickness of the liquid crystal layer is between 5 micrometers and 30 micrometers;
the first liquid crystal layer and the second liquid crystal layer in the device are arranged in a forward direction or a reverse direction.
2. A liquid crystal material gamut widening device as recited in claim 1, wherein the portions of the device are arranged in either a full forward or reverse order.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810734551.9A CN108490681B (en) | 2018-07-06 | 2018-07-06 | Color gamut widening device for liquid crystal material |
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| CN201810734551.9A CN108490681B (en) | 2018-07-06 | 2018-07-06 | Color gamut widening device for liquid crystal material |
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| CN108490681B true CN108490681B (en) | 2023-11-10 |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147829A (en) * | 1994-05-10 | 1997-04-16 | 默克专利股份有限公司 | Supertwist liquid crystal display |
| CN1637513A (en) * | 2004-12-08 | 2005-07-13 | 河北工业大学 | Coplanar converting LCD with video response |
| CN101688937A (en) * | 2007-04-16 | 2010-03-31 | 北卡罗莱纳州立大学 | Low-twist chiral liquid crystal polarization gratings and relative manufacturing process |
| CN105093672A (en) * | 2014-05-13 | 2015-11-25 | 富士胶片株式会社 | Liquid crystal display device |
| CN108051947A (en) * | 2018-01-09 | 2018-05-18 | 河北工业大学 | A kind of colour gamut widens device |
| CN208477260U (en) * | 2018-07-06 | 2019-02-05 | 河北工业大学 | A kind of liquid crystal material colour gamut widens device |
| CN109643035A (en) * | 2016-08-29 | 2019-04-16 | 三星Sdi株式会社 | Liquid crystal display device |
-
2018
- 2018-07-06 CN CN201810734551.9A patent/CN108490681B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1147829A (en) * | 1994-05-10 | 1997-04-16 | 默克专利股份有限公司 | Supertwist liquid crystal display |
| CN1637513A (en) * | 2004-12-08 | 2005-07-13 | 河北工业大学 | Coplanar converting LCD with video response |
| CN101688937A (en) * | 2007-04-16 | 2010-03-31 | 北卡罗莱纳州立大学 | Low-twist chiral liquid crystal polarization gratings and relative manufacturing process |
| CN105093672A (en) * | 2014-05-13 | 2015-11-25 | 富士胶片株式会社 | Liquid crystal display device |
| CN109643035A (en) * | 2016-08-29 | 2019-04-16 | 三星Sdi株式会社 | Liquid crystal display device |
| CN108051947A (en) * | 2018-01-09 | 2018-05-18 | 河北工业大学 | A kind of colour gamut widens device |
| CN208477260U (en) * | 2018-07-06 | 2019-02-05 | 河北工业大学 | A kind of liquid crystal material colour gamut widens device |
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