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Light guide plate with polarization function based on one-dimensional metal photon crystals

A technology of metal photonic crystals and light guide plates, which is applied to optical elements, light guides, light guides of lighting systems, etc. used to change the spectral characteristics of emitted light, can solve problems such as the inability to overcome the 1/2 light loss of the front polarizer, and achieve The effect of improving light extraction efficiency and uniformity, reducing loss, and improving utilization

Active Publication Date: 2010-04-21
厦门市为纳光电科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This invention has a simple structure and solves the problems of uniformity and efficiency of the panel, but still cannot overcome the 1 / 2 light loss of the front polarizer

Method used

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  • Light guide plate with polarization function based on one-dimensional metal photon crystals
  • Light guide plate with polarization function based on one-dimensional metal photon crystals
  • Light guide plate with polarization function based on one-dimensional metal photon crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, this embodiment includes: a light exit surface 1, a bottom surface 2, a light entrance surface 3 and a side surface 4, wherein: the light exit surface 1 is opposite to the bottom surface 2, and the light entrance surface 3 is connected to the light exit surface 1 and the bottom surface 2. Its material is acrylic.

[0021] The lattice points 7 in the one-dimensional transmissive metal photonic crystal lattice array 6 are quadrilateral in shape, and the one-dimensional transmissive metal photonic crystals 5 are fixedly arranged in the lattice points 7 .

[0022] Such as figure 2 As shown, in the one-dimensional transmissive metal grating grid point array 6, the grid points are square, and the side length of the grid points increases with the Bessel function in the direction perpendicular to the light incident surface; Keep the same, so that the area of ​​the grid point near the light source is small, and the area of ​​the grid point at the fa...

Embodiment 2

[0028] Such as Figure 5 As shown, this embodiment changes the design of the bottom surface on the basis of Embodiment 1. The bottom surface 2 of the light guide plate is provided with a polarization conversion structure. / 4 wave plate 9.

[0029] Same as Example 1, this Example 2 realizes the recycling of light with different polarization states through a layer of 1 / 4 wave plate and a layer of reflective layer, and can finally realize the homogenization and polarization of the light guide plate as in Example 1 output.

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Abstract

The invention relates to a light guide plate with a polarization function based on one-dimensional metal photon crystals in the technical field of a liquid crystal display, which comprises a light output face, a bottom face, at least one light input face and a plurality of side faces, wherein the light output face and the bottom face are oppositely arranged, the light input face is connected with the light output face and the bottom face, an array comprising a plurality of lattice points is arranged on the light output face, and one one-dimensional transmission type metal photon crystal is arranged in each lattice point. The invention can enable emergent light to be uniform, enables non-polarized light emitted by a light source of a back light system to be transformed into linearly-polarized light for emergence by the polarization transformation function of the one-dimensional reflection type metal photon crystals and the polarization selecting penetration property of the one-dimensional transmission type metal photon crystals, can reduce energy loss caused by a front polarization piece, enhances the efficiency and even replaces the front polarization piece, thereby simplifying the structure of the light guide plate and lowering the cost.

Description

technical field [0001] The invention relates to a device in the technical field of liquid crystal display, in particular to a light guide plate with polarization function based on one-dimensional metal photonic crystal. Background technique [0002] The liquid crystal display panel is composed of a backlight source, a light guide plate, a diffusion film, a prism anti-reflection film, a front polarizer, a liquid crystal layer, a color filter, and a rear polarizer. Among them, the light source, light guide plate, diffusion film, anti-reflection film, etc. provide a uniform backlight for the liquid crystal panel; the front and rear polarizers and the liquid crystal layer form a light valve to control the luminous flux; the color filter layer performs red, green, and blue three-color filtering. light to form colored pixels. At present, the main problems of this kind of multi-layer cooperation to realize color display are low optical efficiency of backlight, high manufacturing c...

Claims

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Application Information

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IPC IPC(8): F21V8/00F21V13/00F21V9/14F21V11/08G02B27/28G02F1/13357
Inventor 叶志成欧阳世宏苏翼凯
Owner 厦门市为纳光电科技有限公司
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