Liquid crystal display device, polarizing plate, and polarizing plate protective film
A technology of liquid crystal display devices and polarizers, applied in polarizing elements, optics, optical elements, etc., can solve problems such as image quality degradation, and achieve the effects of light leakage suppression and excellent visibility
Active Publication Date: 2019-08-06
TOYOBO CO LTD
View PDF19 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] Polyester film is superior in durability compared to TAC film, but unlike TAC film, it has birefringence, so when it is used as a polarizer protective film, there is a problem that the image quality decreases due to optical distortion
That is, since a birefringent polyester film has a predetermined optical anisotropy (retardation), when it is used as a protective film for a polarizer, when viewed from an oblique direction, rainbow-like stains occur and the image quality deteriorates.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0112] Hereinafter, the present invention will be described more specifically with reference to the examples, but the present invention is not limited by the following examples, and can also be implemented with appropriate changes within the scope of the gist of the present invention, and these implementation modes are included in this document. within the scope of protection of the invention.
[0113] The evaluation method of the physical property in an Example is as follows.
[0114] (1) Difference in heat shrinkage rate in the oblique direction
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| particle size | aaaaa | aaaaa |
| temperature | aaaaa | aaaaa |
| thickness | aaaaa | aaaaa |
Login to View More
Abstract
Provides a polarizer protective film made of polyester film that can suppress light leakage even when two polarizers are placed in a crossed prism environment. A polarizer protective film formed by a polyester film, characterized in that the thermal shrinkage rate of the polarizer protective film in the direction of 45 degrees relative to the film conveying direction and the heat shrinkage in the direction of -45 degrees relative to the film conveying direction The absolute value of the difference in shrinkage rate is 0.4% or less.
Description
technical field [0001] The present invention relates to a polarizing plate protective film used for a polarizing plate in a liquid crystal display device. Background technique [0002] Polarizers used in liquid crystal displays (LCD) generally have a polarizer dyed with iodine on polyvinyl alcohol (PVA) or the like sandwiched between two polarizer protective films. Usually, three polarizer protective films are used. Cellulose acetate (TAC) film. In recent years, along with the thinning of LCDs, there has been a demand for thinner polarizers. However, when the thickness of the TAC film used as a protective film is reduced for this reason, sufficient mechanical strength cannot be obtained, and there arises a problem that moisture permeability deteriorates. Furthermore, TAC thin films are very expensive, and there is a strong need for inexpensive alternative raw materials. [0003] Therefore, for the purpose of thinning polarizing plates, methods have been proposed in which ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30B32B7/023B32B27/36C08J5/18G02F1/1335G02F1/13363
CPCB32B27/36B32B27/06B32B2457/202G02B5/305B32B7/023
Inventor 村田浩一佐佐木靖
Owner TOYOBO CO LTD