A kind of polarizer and display device
A polarizer and polarization technology, applied in the field of polarizers and display devices, can solve the problems of not exceeding 50%, wasting large-unit light energy, etc., and achieve the effect of improving transmittance
Inactive Publication Date: 2017-05-31
BOE TECH GRP CO LTD
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Problems solved by technology
[0004] It can be seen that the transmittance has always been the bottleneck of traditional polarizers, and the transmittance of the best polarizers cannot exceed 50%, wasting the light energy of large units
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[0028] Before introducing the embodiments of the present invention, the principles involved in the present invention will be introduced first.
[0029] Such as figure 1 Shown, when the light from the refractive index n 1 The oblique incidence refractive index of the first medium is n 2 When there is a second medium, reflection and refraction occur at the junction of the two media. According to Fresnel's Fresnel formula, the incident light can be divided into S component linearly polarized light and P component linearly polarized light whose vibration directions are perpendicular to each other. The vibration direction of S component linearly polarized light is perpendicular to the incident surface, and the direction of P component linearly polarized light parallel to the plane of incidence. The reflectance and transmittance formulas corresponding to the S-component linearly polarized light and the P-component linearly polarized light at the interface are as follows.
[0030...
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The invention provides a polarizer and a display device. The polarizer is composed of a plurality of connected polarization structures. Each polarization structure specifically comprises a light incidence unit, a light split unit, a light emergence unit and a light change unit, wherein the light split unit is used for decomposing light rays into first linearly polarized light in the first polarization direction and second linearly polarized light in the second polarization direction after incidence of the light rays generated by a backlight module through the light incidence unit; the light emergence unit is used for shooting the first linearly polarized light out; the light change unit is used for converting the second linearly polarized light into third linearly polarized light in the first polarization direction; the third linearly polarized light passes through the light emergence unit and the light split unit in the adjacent polarization structure and then is shot out. The polarizer can convert all the incident light rays into linearly polarized light in the same vibration direction, so the theoretical penetration rate of the polarizer reaches 100%; therefore, the penetration rate of the polarizer is increased.
Description
technical field [0001] The invention relates to the field of polarizers, in particular to a polarizer and a display device. Background technique [0002] Whether it is a traditional liquid crystal display LCD or an emerging organic light-emitting diode OLED display, it is inseparable from a polarizer. [0003] In the production of traditional polarizers, one unit uses the characteristics of anisotropic crystals to selectively absorb polarized light in different vibration directions, such as H polarizers or K polarizers, which are realized by stretching the iodine chain formed by iodine-polyvinyl alcohol molecules. The purpose of outgoing polarized light; the first unit uses the selective refraction principle of birefringent crystals to divide the refracted light into o light and e light, because o light obeys the law of refraction, while e light does not obey the law of refraction, its light direction and wave normal There is a discrete angle in the direction, so that the b...
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IPC IPC(8): G02B5/30
CPCG02B5/3033
Inventor 孙艳六
Owner BOE TECH GRP CO LTD