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Transparent substrate with optical compensation function and its LCD device

A liquid crystal display and transparent substrate technology, applied in optics, optical components, nonlinear optics, etc., can solve the problems of complicated manufacturing process and increased manufacturing cost of flexible liquid crystal displays

Active Publication Date: 2009-06-10
IND TECH RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, externally attaching the optical compensation film not only increases the manufacturing cost, but also complicates the manufacturing process of the flexible liquid crystal display.

Method used

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  • Transparent substrate with optical compensation function and its LCD device
  • Transparent substrate with optical compensation function and its LCD device
  • Transparent substrate with optical compensation function and its LCD device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: 6FDA-m-TB-HG-co-6FDA-DACH (PI-FTD)

[0036] At room temperature, using a three-necked flask with nitrogen, 1.64 g of 2.2'-dimethyl-4-4'-diamine biphenyl (2,2'-Dimethyl-4,4'-diamino biphenyl, m -TB-HG) and 0.70g of 4,4-dimethylene-bis-cyclohexylamine (4,4-methylene bis(cyclohexylamine), DACH) were dissolved in 30g of DMAc, and m-TB-HG and After the DACH was completely dissolved, 5 g of 6FDA bis-acid anhydride was added until the 6FDA was completely dissolved, and the stirring was continued for 3 hours to form a viscous polyamic acid solution. Then use a scraper to form a film on the glass substrate, and then heat it to 100°C, 200°C and 300°C for 1 hour to bake for imidization reaction, and form a highly transparent and colorless polyimide film material. Its molecular structure is as follows: Figure 5 shows.

Embodiment 2

[0037] Embodiment 2: 6FDA-ODA-co-6FDA-DACH (PI-FOD)

[0038] At room temperature, using a three-necked flask with nitrogen gas, dissolve 1.10 g of ODA and 1.16 g of DACH dianiline into 30 g of DMAc, and then add 5 g of 6FDA bis-anhydride until 6FDA is completely dissolved. After complete dissolution, the stirring was continued for 3 hours to form a viscous polyamic acid solution. Then use a scraper to form a film on the glass substrate, and then heat it to 100°C, 200°C and 300°C for 1 hour to bake for imidization reaction, and form a highly transparent and colorless polyimide film material. Its molecular structure is as follows: Figure 6 shows.

Embodiment 3

[0039] Embodiment three: 6FDA-DACH-co-DSDA-DACH (PI-FSD-I)

[0040] At room temperature, using a three-necked flask with nitrogen, dissolve 2.49 g of DACH dianiline into 30 g of DMAc, and then add 3.5 g of 6FDA and 1.5 g of 3,3′,4,4 '-diphenyl sulfone tetracarboxylic acid anhydride 4,4-disulfonyldiphthalic anhydride, DSDA) was added until 6FDA and DSDA were completely dissolved, and continued stirring for 3 hours to form a viscous polyamic acid solution. Then use a scraper to form a film on the glass substrate, and then heat it to 100°C, 200°C and 300°C for 1 hour to bake for imidization reaction, and form a highly transparent and colorless polyimide film material. Its molecular structure is as follows: Figure 7 shows.

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Abstract

The invention relates to a transparent substrate having optical compensation function, comprising polyimide with the formula on the right, wherein the A and A' are cyclo-aliphatic compounds or aromatic compounds; B and B' are cyclo-aliphatic compounds or aromatic compounds; and nx is equal to ny and more than nz, which means provides the invention with controlled negative c-plate compensation function, wherein the nx represents the transverse refractive index of the transparent substrate, ny represents the longitudinal refractive index of the transparent substrate, nz represents the refractive index along the thickness of the transparent substrate, and m and n is between 10 and 10000.

Description

technical field [0001] The invention relates to a transparent substrate with optical compensation function and its liquid crystal display, in particular to a transparent substrate with adjustable negative c-plate retardation compensation function and its liquid crystal display. Background technique [0002] Flexible displays have excellent characteristics such as lightness, thinness, impact resistance, unbreakable, easy to carry, curved surface display, rollability and wearability, and can be produced in a continuous roll-to-roll (roll-to-roll) manner. Therefore, the production cost can be greatly reduced, so it has become a new trend in the development of the new generation of displays. In order to meet the harsh process conditions of active thin film transistors (thin film transistor, TFT), the development of flexible substrate materials with high heat resistance, low thermal expansion coefficient and high chemical resistance will affect the new generation of flexible disp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/30G02B1/00G02F1/1335
Inventor 田宏隆吕奇明张含章
Owner IND TECH RES INST