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Wide-viewing angle wave plate and application thereof

A wide viewing angle and wave plate technology, applied in optics, instruments, nonlinear optics, etc., can solve problems such as high material requirements and difficult manufacturing processes, and achieve the effects of reducing environmental hazards and saving costs

Active Publication Date: 2013-10-16
JIANGSU HECHENG DISPLAY TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, this method requires the use of triaxial crystals or multi-materials for biaxial stretching, but the wave plate produced by this method has high requirements on materials and difficult manufacturing processes.

Method used

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  • Wide-viewing angle wave plate and application thereof
  • Wide-viewing angle wave plate and application thereof
  • Wide-viewing angle wave plate and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Prepare four pieces of ITO glass (obtained through commercial channels) for orientation treatment: two of them have a pretilt angle of 2° (A), and the other two have a pretilt angle of 88° (B). Lay one piece of glass A and one piece of B glass to make two pieces of 5μm liquid crystal cells.

[0059] The nematic liquid crystal used in the wide viewing angle wave plate is produced by Jiangsu Hecheng Display Technology Co., Ltd., model: HAG603200-000.

[0060] The liquid crystal is poured into a 5μm liquid crystal cell by capillary action, heated until clear, and then slowly cooled to room temperature, so that the liquid crystal molecules in the liquid crystal cell are arranged in an orderly manner. Bond two liquid crystal cells to form a λ / 2 wide viewing angle wave plate. It is required that the glass surfaces of B face inward, and ensure that the orientation direction of the glass surfaces of A is consistent.

[0061] Place the completed wide viewing angle wave plate b...

Embodiment 2

[0066] Prepare four pieces of ITO glass (obtained through commercial channels) for orientation treatment: two of them have a pretilt angle of 2° (A), and the other two have a pretilt angle of 88° (B). Lay one piece of glass A and one piece of B glass to make two pieces of 5μm liquid crystal cells.

[0067] The polymerizable nematic liquid crystal and photoinitiator used in the wide viewing angle wave plate are produced by Jiangsu Hecheng Display Technology Co., Ltd., and the models are WAWP005-01 and IE184. Wherein the photoinitiator content accounts for 0.1% by weight of the mixture. Heat and stir the mixture until it becomes clear and then stir evenly at room temperature. During the stirring process, the mixture needs to be protected from light, or operated under yellow light.

[0068] The liquid crystal is poured into a 5μm liquid crystal cell by capillary action, heated until clear, and then slowly cooled to room temperature, so that the liquid crystal molecules in the li...

Embodiment 3

[0075] Prepare two pieces of ITO glass (obtained through commercial channels) for orientation treatment: the pretilt angle is 1°. Lay two pieces of glass together to make a 10 μm antiparallel friction box.

[0076] The polymerizable nematic liquid crystal and photoinitiator used in the wide viewing angle wave plate are produced by Jiangsu Hecheng Display Technology Co., Ltd., and the models are WAWP005-01 and IE184. Wherein the photoinitiator content accounts for 0.1% by weight of the mixture. Heat and stir the mixture until it becomes clear and then stir evenly at room temperature. During the stirring process, the mixture needs to be protected from light, or operated under yellow light.

[0077] The liquid crystal is poured into a 10μm liquid crystal cell by capillary action, heated until clear, and then slowly cooled to room temperature, so that the liquid crystal molecules in the liquid crystal cell are arranged in an orderly manner. Apply a voltage of 1.3v and 1000Hz to ...

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Abstract

The invention provides a wide-viewing angle wave plate comprising two liquid crystal boxes, wherein each liquid crystal box comprises a first side, a second side, and bi-refringence liquid crystal material between the two sides; the first side and the second side are opposite to each other; the two liquid crystal boxes are configured in such a manner that the first sides or the second sides are jointed; the preset tilt angle, near the first side, of the liquid crystal molecules of the bi-refringence liquid crystal material in each liquid crystal box is 0 to 20 degrees; the preset tilt angle, near the second side, of the liquid crystal molecules of the bi-refringence liquid crystal material in the liquid crystal box is 70 to 90 degrees; the liquid crystal molecules of the bi-refringence liquid crystal material between the first side and the second side are naturally extended or curled. The wide-viewing angle wave plate has the advantages that the manufacture process is simpler, the production cost is lower, and the phase difference generated by the wave plate cannot change with visual angles any more.

Description

technical field [0001] The invention relates to a wave plate, in particular to a wide viewing angle wave plate and its application in optical devices. Background technique [0002] The commonly used wave plate is made of birefringent crystal or resin material after uniaxial stretching. The resulting phase retardation varies significantly with the direction of light passing through the wave plate. This difference destroys the viewing angle characteristics of the optic. For example, in a 3D display device using circularly polarized light, at a normal viewing angle, the λ / 4 plate can correctly convert mutually perpendicular linearly polarized light into left-handed and right-handed circularly polarized light; but as the viewing angle tilts, the λ / 4 plate produces The amount of light retardation will vary with viewing angle, and left-handed and right-handed circularly polarized light will have elliptical components. This phenomenon will cause crosstalk between left and right ...

Claims

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Application Information

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IPC IPC(8): G02F1/1347G02F1/1333G02B5/30
Inventor 钱皓董昆
Owner JIANGSU HECHENG DISPLAY TECHCO
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