CN217181267U - Circular polarizer capable of improving brightness of wide viewing angle and display - Google Patents
Circular polarizer capable of improving brightness of wide viewing angle and display Download PDFInfo
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- CN217181267U CN217181267U CN202220228363.0U CN202220228363U CN217181267U CN 217181267 U CN217181267 U CN 217181267U CN 202220228363 U CN202220228363 U CN 202220228363U CN 217181267 U CN217181267 U CN 217181267U
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Abstract
A circular polarizer and a display with the function of improving the brightness of a wide visual angle are disclosed, wherein the circular polarizer with the function of improving the brightness of the wide visual angle comprises a brightness enhancement film, a phase difference compensation film and a linear polarizing plate which are sequentially stacked, the brightness enhancement film is made of cholesteric liquid crystal and is a single-layer full-visible wave band brightness enhancement film or a multi-layer full-visible wave band brightness enhancement film, and when the brightness enhancement film is a single-layer full-visible wave band brightness enhancement film, the brightness enhancement film is made of a chiral compound doped in the cholesteric liquid crystal; when the brightness enhancement film is a multilayer full-visible waveband brightness enhancement film, the brightness enhancement film comprises at least one layer of blue light brightness enhancement film, or/and at least one layer of green light brightness enhancement film, or/and at least one layer of red light brightness enhancement film, which are arranged in a laminated and bonded manner. The utility model discloses can improve the screen brightness under arbitrary visual angle by a wide margin, all have the blast effect to full visible light wave band, under the prerequisite that does not change luminous consumption promptly, can make the light utilization ratio that the luminescent device of display sent improve more than 30%, luminous energy consumption reduces more than 25%.
Description
Technical Field
The utility model relates to a circle polaroid design field, concretely relates to circle polaroid and display with improve wide visual angle luminance.
Background
With the continuous improvement of the social informatization degree, Liquid Crystal Display (LCD) display technology, organic electroluminescence (OLED) display technology, Mini-LED, Micro-LED and other novel display technologies have been developed greatly since the 21 st century. The novel display technology is widely applied to the fields of mobile phones, computers, automobiles, household appliances and the like. Due to the structural limitation of the linear polarizing plate in the display device, 50% of light is absorbed by the linear polarizing plate and is converted into heat energy, so that the utilization efficiency of light emitted by the light-emitting device in the display device is less than 50%, and in the prior art, the brightness of a display screen under a wide viewing angle is far less than a vertical visual angle, and the unused light causes the energy consumption of the power-generating device to be high. Therefore, a new technique is needed to improve the utilization efficiency of light in the display and improve the brightness of the display screen under a wide viewing angle.
SUMMERY OF THE UTILITY MODEL
Based on this, the utility model provides a circular polaroid and display with improve wide visual angle luminance to solve display screen non-vertical angle visual brightness such as LCD, OLED, Mini-LED, Micro-LED inadequately, the utilization efficiency of light is not high, and the technical problem of the partial specific wavelength range visible light of blast only can be put forward.
In order to achieve the above object, the utility model provides a circular polarizer with improve wide visual angle luminance, it is including the brightness enhancement film, phase difference compensation film and the linear polarizing plate that stack gradually the setting, the material of brightness enhancement film is cholesteric phase liquid crystal, just the brightness enhancement film is the full visible light wave band brightness enhancement film of individual layer or the full visible light wave band brightness enhancement film of multilayer, wherein:
when the brightness enhancement film is a single-layer full-visible wave band brightness enhancement film, the material of the brightness enhancement film also comprises a chiral compound doped in cholesteric liquid crystal;
when the brightness enhancement film is a multilayer full-visible light waveband brightness enhancement film, the brightness enhancement film comprises at least one layer of blue light brightness enhancement film, or/and at least one layer of green light brightness enhancement film, or/and at least one layer of red light brightness enhancement film, which are arranged in a laminated and bonded mode.
As a further preferable technical solution of the present invention, the reflection wavelength of the single-layer full visible light band brightness enhancement film is between 370nm and 780nm, and the doping concentration of the chiral compound in the cholesteric liquid crystal gradually increases or decreases from one side of the brightness enhancement film to the other side thereof.
As a further preferred technical scheme of the utility model, the reflection wavelength of blue light brightness enhancement film is between 400nm-520nm, the reflection wavelength of green glow brightness enhancement film is between 480nm-620nm, the reflection wavelength of ruddiness brightness enhancement film is between 580nm-730nm, the reflection wavelength of each layer coincide back of multilayer full visible light wave band brightness enhancement film is between 370nm-780 nm.
As a further preferable technical proposal of the utility model, the reflection bandwidth of the brightness enhancement film is between 50nm and 400 nm.
As a further preferable technical proposal of the utility model, the thickness of the brightness enhancement film is 0.5-10 μm when the brightness enhancement film is of a single-layer structure, and is 2-100 μm when the brightness enhancement film is of a multi-layer structure.
As a further preferable embodiment of the present invention, the linear polarizing plate is an iodine-based polarizing plate.
As a further preferred technical solution of the present invention, the linear polarizer includes two layers of triacetylcellulose and one layer of polyvinyl alcohol, and the polyvinyl alcohol clamp is disposed between the two layers of triacetylcellulose.
As a further preferable embodiment of the present invention, the phase difference compensation film includes a quarter phase retardation film and a compensation film which are laminated and bonded.
As a further preferred technical solution of the present invention, the quarter-phase retardation film includes at least one of a polymer stretching type inverse dispersion quarter-phase retardation film, a polymer stretching type a plate quarter-phase retardation film, a liquid crystal type inverse dispersion composite quarter-phase retardation film, a liquid crystal type a plate quarter-phase retardation film, a liquid crystal type O plate quarter-phase retardation film, and a liquid crystal type biaxial quarter-phase retardation film; the compensation film is a liquid crystal coating type retardation compensation film or an extension type retardation compensation film, and satisfies 100nm or more Re (550) or less 160nm, Re (450)/Re (550) or less 1 and Re (650)/Re (550) or more 1, and Re (450), Re (550) and Re (650) respectively represent in-plane retardation measured by light having a wavelength of 450nm, 550nm and 650nm at 23 ℃.
According to the utility model discloses a further scheme, the utility model also provides a display, the display includes any one of the aforesaid circle polaroid that has the luminance of improvement wide visual angle, the circle polaroid through its brightness enhancement film with the laminating of light-emitting device's of display light-emitting side.
The utility model discloses a circular polaroid and display with improve wide visual angle luminance, through adopting above-mentioned technical scheme, make the utility model discloses a circular polaroid is applied to in the display, can improve the screen brightness under arbitrary visual angle by a wide margin, all there is the blast effect to full visible light wave band simultaneously, be promptly under the prerequisite that does not change luminous power consumption, the light utilization ratio that can make the luminescent device of display send improves more than 30%, luminous energy consumption reduces more than 25%, can improve arbitrary visual angle screen brightness by a wide margin under the unchangeable prerequisite of luminous energy consumption in other words, improve the single standby time who uses the mobile power source electronic equipment display by a wide margin, and reduced the temperature rise because of absorbing extravagant light energy, whole electron device's operating efficiency and life have been improved promptly.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is an exploded view of an example of a circular polarizer with improved brightness at a wide viewing angle according to the present invention;
FIG. 2 is a schematic diagram showing the doping concentration variation of a chiral compound in a single-layer all visible light band brightness enhancement film.
In the figure: 1. a brightness enhancement film 2, a phase difference compensation film 3 and a linear polarizer.
The purpose of the present invention is to provide a novel and improved method and apparatus for operating a computer.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description. In the preferred embodiments, the terms "upper", "lower", "left", "right", "middle" and "a" are used for the sake of clarity only, and are not intended to limit the scope of the invention, its relative relationship between the terms and their derivatives, and the scope of the invention should be understood as being limited by the claims.
As shown in fig. 1, the utility model provides a circular polarizer with improve wide visual angle luminance, including the brightness enhancement film 1, phase difference compensation film 2 and the linear polarizing plate 3 that stack gradually the setting, brightness enhancement film 1's material is cholesteric phase liquid crystal, just brightness enhancement film 1 is the full visible light wave band brightness enhancement film 1 of individual layer or the full visible light wave band brightness enhancement film 1 of multilayer, and the laminating is leaned on through brightness enhancement film 1 and the light-emitting device of display (like the OLED display) light-emitting device when this circular polarizer is applied to the display.
When the brightness enhancement film 1 is a single-layer full-visible light waveband brightness enhancement film 1, the material of the brightness enhancement film 1 further comprises a chiral compound doped in cholesteric liquid crystal, and the doping concentration of the chiral compound in the cholesteric liquid crystal gradually increases or decreases from one side of the brightness enhancement film 1 to the other side. During preparation, a gradient flow coating method is utilized to simultaneously and uniformly coat a plurality of cholesteric liquid crystal monomers doped with chiral compounds, and then the cholesteric liquid crystal monomers are polymerized to obtain the single-layer full-visible light waveband brightness enhancement film 1. Because the ratio of the doped chiral compound is different between the coated layers, the surface tension is different and the layers are not mutually soluble, so that a pitch gradient is formed in the brightness enhancement film 1, the reflection wavelength is between 380nm and 780nm, and the reflection bandwidth can cover the full visible light wave band which is between 50nm and 400 nm. In one embodiment, the single-layer all visible band brightness enhancement film 1 is shown in fig. 2, which shows the doping concentration variation of the chiral compound, i.e. the doping concentration gradually increases from bottom to top. In practical applications, the side with the higher doping concentration of the chiral compound may be bonded to the retardation compensation film 2, or the side with the lower doping concentration of the chiral compound may be bonded to the retardation compensation film 2, which is not limited herein.
When the brightness enhancement film 1 is a plurality of layers of full-visible light waveband brightness enhancement films 1, the brightness enhancement film 1 comprises at least one layer of blue light brightness enhancement film 1, or/and at least one layer of green light brightness enhancement film 1, or/and at least one layer of red light brightness enhancement film 1, which are stacked and bonded, and the layers can be stacked according to a specified or random order, which is not limited herein. Preferably, the brightness enhancement films 1 comprise at least one layer of blue brightness enhancement film 1, at least one layer of green brightness enhancement film 1, and at least one layer of red brightness enhancement film 1 in a laminated and bonded arrangement.
Taking the blue light brightness enhancement film 1, the green light brightness enhancement film 1 and the red light brightness enhancement film 1 as an example, the blue light brightness enhancement film 1, the green light brightness enhancement film 1 and the red light brightness enhancement film 1 can be prepared separately, and then the blue light brightness enhancement film 1, the green light brightness enhancement film 1 and the red light brightness enhancement film 1 are bonded together through a bonding adhesive layer to obtain the multilayer full visible light waveband brightness enhancement film 1. As the reflection wavelength of the blue light brightness enhancement film 1 is between 400nm and 520nm, the reflection wavelength of the green light brightness enhancement film 1 is between 480nm and 620nm, and the reflection wavelength of the red light brightness enhancement film 1 is between 580nm and 730nm, the reflection wavelength of the multilayer full visible light waveband brightness enhancement film 1 is between 380nm and 780nm, and the reflection bandwidth can cover the full visible light waveband which is between 50nm and 20000 nm.
The number of layers of the multilayer all visible light band brightness enhancement film 1 includes, but is not limited to, three layers, and the larger the number of composite layers, the wider the reflection bandwidth coverage.
In one embodiment, the linear polarizer 3 is an iodine polarizer.
The linear polarizing plate 3 includes two layers of triacetylcellulose and a layer of polyvinyl alcohol, and the polyvinyl alcohol is sandwiched between the two layers of triacetylcellulose.
In a specific implementation, the phase difference compensation film 2 comprises a quarter-phase retardation film and a compensation film which are laminated and bonded together.
The quarter-phase retardation film comprises at least one of a macromolecule stretching type inverse dispersion quarter-phase retardation film, a macromolecule stretching type A plate quarter-phase retardation film, a liquid crystal type inverse dispersion composite quarter-phase retardation film, a liquid crystal type A plate quarter-phase retardation film, a liquid crystal type O plate quarter-phase retardation film and a liquid crystal type biaxial quarter-phase retardation film; the compensation film meets the following requirements: re (550) is 100nm or more and 160nm or less, Re (450)/Re (550) is 1 or less, and Re (650)/Re (550) is 1 or more, wherein Re (450), Re (550) and Re (650) respectively represent in-plane phase differences measured at 23 ℃ by light having wavelengths of 450nm, 550nm and 650 nm. The compensation film is a liquid crystal coating type phase difference compensation film 2 or an extension type phase difference compensation film 2.
The utility model discloses a structure principle of circle polaroid with improve wide visual angle luminance as follows:
the brightness enhancement film 1 can convert light emitted by a display screen luminescent device into left-handed polarized light and right-handed polarized light, and selectively passes through the left-handed polarized light and reflects the right-handed polarized light or passes through the right-handed polarized light and reflects the left-handed polarized light by utilizing the optical rotation selectivity of a cholesteric liquid crystal material. When the polarized light that does not pass through the brightness enhancement film 1 is reflected back to the electrode of the light emitting device (organic layer of the display) and then reflected back to the brightness enhancement film 1 again, the rotation direction thereof is changed, and the polarized light with the changed rotation direction is the required polarized light, and then the polarized light can pass through the brightness enhancement film 1. The utility model discloses a modified brightness enhancement film 1 makes the steerable arbitrary numerical value of reflection bandwidth between 50nm-400nm, can make the light that sends by luminescent device, when the contained angle between its direction of propagation and brightness enhancement film 1 is greater than 0 and is less than 180 between, light all can pass through brightness enhancement film 1 or by the reflection of brightness enhancement film 1. Therefore, the brightness enhancement film 1 can greatly improve the screen brightness at any visual angle on the premise of not changing the light emitting power consumption.
The utility model discloses in be based on the circular polaroid of above-mentioned principle and be applied to the display, can make the light utilization ratio that the luminescent device of display sent improve more than 30%, can practice thrift luminous energy consumption more than 25%, can improve arbitrary visual angle screen brightness by a wide margin under the unchangeable prerequisite of luminous energy consumption in other words, improve the single standby time who uses the portable power source electronic equipment display by a wide margin, reduce the temperature rise that arouses because of absorbing extravagant light energy, improve whole electron device's operating efficiency and life.
Although specific embodiments of the present invention have been described above, it will be appreciated by those skilled in the art that these are merely examples and that many changes and modifications may be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims.
Claims (8)
1. The utility model provides a circular polarizer with improve wide visual angle luminance which characterized in that, includes the brightness enhancement film, phase difference compensation film and the linear polarizing plate that stack gradually the setting, the material of brightness enhancement film is cholesteric liquid crystal, and the brightness enhancement film is single-deck full visible light wave band brightness enhancement film or multilayer full visible light wave band brightness enhancement film, wherein:
when the brightness enhancement film is a single-layer full-visible wave band brightness enhancement film, the material of the brightness enhancement film also comprises a chiral compound doped in cholesteric liquid crystal;
when the brightness enhancement film is a plurality of layers of full-visible light waveband brightness enhancement films, the brightness enhancement film comprises at least one layer of blue light brightness enhancement film, or/and at least one layer of green light brightness enhancement film, or/and at least one layer of red light brightness enhancement film which are arranged in a laminating and bonding mode; wherein the phase difference compensation film comprises a quarter phase retardation film and a compensation film which are laminated and bonded;
the quarter-phase retardation film comprises at least one of a polymer stretching type inverse dispersion quarter-phase retardation film, a polymer stretching type A plate quarter-phase retardation film, a liquid crystal type inverse dispersion composite quarter-phase retardation film, a liquid crystal type A plate quarter-phase retardation film, a liquid crystal type O plate quarter-phase retardation film and a liquid crystal type biaxial quarter-phase retardation film; the compensation film is a liquid crystal coating type retardation compensation film or an extension type retardation compensation film, and satisfies the conditions that Re (550) is not less than 100nm and not more than 160nm, Re (450)/Re (550) is not more than 1 and Re (650)/Re (550) is not less than 1, wherein Re (450), Re (550) and Re (650) respectively represent in-plane retardation measured by light with the wavelength of 450nm, 550nm and 650nm at 23 ℃.
2. The circular polarizer according to claim 1, wherein the single layer of full visible band brightness enhancement film has a reflection wavelength between 370nm and 780 nm.
3. The circular polarizer of claim 1, wherein the blue brightness enhancement film has a reflection wavelength between 400nm and 520nm, the green brightness enhancement film has a reflection wavelength between 480nm and 580nm, the red brightness enhancement film has a reflection wavelength between 580nm and 730nm, and the stacked layers of the multilayer all visible band brightness enhancement film have a reflection wavelength between 370nm and 780 nm.
4. The circular polarizer according to claim 2 or 3, wherein the reflection bandwidth of the brightness enhancement film is between 50nm-400 nm.
5. The circular polarizer according to claim 4, wherein the brightness enhancement film has a thickness of 0.5 μm to 50 μm in a single layer structure and a thickness of 10 μm to 200 μm in a multilayer structure.
6. The circular polarizer according to claim 1, wherein the linear polarizing plate is an iodine-based polarizing plate.
7. The circular polarizer according to claim 1, wherein the linear polarizing plate comprises two layers of triacetylcellulose and a layer of polyvinyl alcohol, and the polyvinyl alcohol is sandwiched between the two layers of triacetylcellulose.
8. A display comprising the circular polarizer with enhanced brightness at wide viewing angle of any one of claims 1 to 7, wherein the circular polarizer is attached to the light emitting side of the light emitting device of the display through its brightness enhancement film.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115079332A (en) * | 2022-08-18 | 2022-09-20 | 西安明为光学科技有限公司 | Brightness enhancement film and OLED display device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115079332A (en) * | 2022-08-18 | 2022-09-20 | 西安明为光学科技有限公司 | Brightness enhancement film and OLED display device |
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