Unlock instant, AI-driven research and patent intelligence for your innovation.
Composition for forming cured film, orientation material, and retardation material
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A curing film and composition technology, applied in the direction of instruments, polarizing elements, optical elements, etc., can solve the problems of low display contrast ratio, difficulty in improving contrast ratio and brightness, response speed, brightness change/color change, etc., Achieve the effects of efficient formation, high transparency, high solvent resistance, and excellent vertical alignment
Active Publication Date: 2021-07-13
NISSAN CHEM CORP
View PDF6 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0002] The characteristic of IPS-LCD is that since there is no inclination in the vertical direction of the liquid crystal molecules, there is little brightness change / color change due to the viewing angle; however, as disadvantages, it is difficult to improve the contrast ratio, brightness, and response speed
For example, as disclosed in Patent Document 1, the viewing angle compensation film was not used in the IPS-LCD at the initial stage of proposal. , so there is a disadvantage that the value of the display contrast ratio is low
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 more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment
[0164] Hereinafter, examples are given and the present invention will be described in more detail, but the present invention is not limited by these examples.
[0165] [Abbreviated symbols used in Examples]
[0166] The meanings of the abbreviations used in the following examples are as follows.
[0183] The number-average molecular weight and weight-average molecular weight of the acrylic copolymer obtained according to the following synthesis examples were de...
Synthetic example 1
[0185] By dissolving 13.8 g of MAA, 14.1 g of LAA, 7.2 g of HEMA, and 0.68 g of AIBN as a polymerization catalyst in 107.0 g of PM, it was reacted at 80° C. for 16 hours to obtain an acrylic copolymer solution (solid content concentration 25 mass %) (P1). Mn of the obtained acrylic copolymer was 13,300, and Mw was 27,800.
Synthetic example 2
[0187] 8.8 g of MAA, 14.0 g of LAA, 5.2 g of HEMA, and 0.53 g of AIBN as a polymerization catalyst were dissolved in 85.5 g of PM, and reacted at 80° C. for 16 hours to obtain an acrylic copolymer solution (solid content concentration: 25 mass %) (P2). Mn of the obtained acrylic copolymer was 11,900, and Mw was 28,800.
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
Login to View More
Abstract
The object of the present invention is to provide an alignment material having excellent vertical alignment and capable of highly sensitive alignment even on a resin film, and a composition for forming a cured film for providing a retardation material using the alignment material. The polymerizable liquid crystal is aligned vertically. The solution of the present invention is a composition for forming a cured film, an orientation material, and a retardation material, wherein the composition for forming a cured film is characterized in that it contains (A) a compound having a vertical alignment group and a functional group capable of thermal crosslinking. A polymer and (B) a crosslinking agent; the orientation material is obtained using the composition; and the phase difference material is obtained using the composition.
Description
technical field [0001] The present invention relates to a cured film-forming composition suitable for a vertical alignment material that orients liquid crystal molecules vertically. In particular, the present invention relates to improving viewing angle characteristics of a liquid crystal display (liquid crystal display; LCD), specifically for improving IPS liquid crystals filled with liquid crystals having positive dielectricanisotropy (Δε>0). Cured film-forming composition, orientation material, and retardation material useful for producing a +C plate (positive C plate) for viewing angle characteristics of a liquid crystal display of a display device (In-plane Switching LCD; in-plane orientation switching LCD). Background technique [0002] IPS-LCD is characterized in that since there is no vertical inclination of liquid crystal molecules, there is little brightness change / color change due to viewing angle; however, as disadvantages, it is difficult to improve contrast...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More