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Liquid crystal display device

A technology of liquid crystal display devices and liquid crystal compositions, applied in liquid crystal materials, porphine/acridine porphine, optics, etc., can solve problems such as uneven orientation, increased ion density of voltage retention rate, and white spots, so as to prevent white spots and Reduced effect

Active Publication Date: 2019-10-01
DIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] The object of the present invention is to provide a kind of liquid crystal display device, it prevents the voltage retention ratio (VHR) of liquid crystal layer from decreasing, ion density (ID) increases by using specific liquid crystal composition and the color filter that has utilized specific pigment, solves the problem Poor display problems such as white spots, uneven orientation, and screen burn-in

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0410]Fabricate an electrode structure on at least one of the first and second substrates, perform a weak rubbing treatment after forming a horizontally oriented alignment film on the respective opposite sides, and fabricate an IPS unit, sandwiching between the first substrate and the second substrate Liquid crystal composition 1 shown below was used. The physical property values ​​of the liquid crystal composition 1 are shown in the following table. Next, using the color filters 1 to 5 shown in the above table, the liquid crystal display devices of Examples 1 to 5 were fabricated (d gap =4.0 μm, alignment film AL-1051). The VHR of the obtained liquid crystal display device was measured. In addition, burn-in evaluation was performed on the obtained liquid crystal display device. The results are shown in the following tables.

[0411] [Table 11]

[0412] Liquid crystal composition 1

[0413]

[0414] [Table 12]

[0415] Example 1 Example 2 Example 3 ...

Embodiment 6～15

[0419] In the same manner as in Example 1, liquid crystal display devices of Examples 6 to 15 were produced by sandwiching liquid crystal compositions 2 to 3 shown in the following table, and using color filters 1 to 5 shown in the above table, and their VHRs were measured. In addition, this liquid crystal display device was evaluated for burn-in. The results are shown in the following tables.

[0420] [Table 13]

[0421]

[0422] [Table 14]

[0423] Example 6 Example 7 Example 8 Example 9 Example 10 liquid crystal composition Liquid crystal composition 2 Liquid crystal composition 2 Liquid crystal composition 2 Liquid crystal composition 2 Liquid crystal composition 2 color filter color filter 1 color filter 2 color filter 3 color filter 4 color filter 5 VHR 99.4 99.5 99.6 99.5 99.5 burn screen ○ ○ ◎ ◎ ◎

[0424] [Table 15]

[0425] Example 11 Example 12 Example 13 Example 14 E...

Embodiment 16～30

[0428] Liquid crystal display devices of Examples 16 to 30 were produced by sandwiching liquid crystal compositions 4 to 6 shown in the following table in the same manner as in Example 1, and their VHRs were measured using color filters 1 to 5 shown in the above table. In addition, this liquid crystal display device was evaluated for burn-in. The results are shown in the following tables.

[0429] [Table 16]

[0430]

[0431] [Table 17]

[0432] Example 16 Example 17 Example 18 Example 19 Example 20 liquid crystal composition Liquid crystal composition 4 Liquid crystal composition 4 Liquid crystal composition 4 Liquid crystal composition 4 Liquid crystal composition 4 color filter color filter 1 color filter 2 color filter 3 color filter 4 color filter 5 VHR 99.4 99.4 99.6 99.6 99.5 burn screen ○ ○ ◎ ◎ ○

[0433] [Table 18]

[0434] Example 21 Example 22 Example 23 Example 24 Ex...

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Abstract

The present invention pertains to a liquid crystal display device using a color filter which employs a specific liquid crystal composition, a specific pigment, and a specific compound. The present invention provides a liquid crystal display device that prevents a reduction in voltage holding rate (VHR) and an increase in ion density (ID) of a liquid crystal layer, and that solves the problem of display defects, such as voids, variations in orientation, and image persistence. Since the liquid crystal display device according to the present invention is characterized by being able to prevent a reduction in voltage holding rate (VHR) and an increase in ion density (ID) of a liquid crystal layer and to solve the problem of display defects, such as voids, variations in orientation, and image persistence; the liquid crystal display device is particularly useful for liquid crystal display devices of an ECB mode, VA mode, OCB mode, FFS mode, polymer-stabilizing IPS mode, IPS mode, and TN modefor driving an active-matrix, and is applicable to liquid crystal display devices for liquid crystal TVs, monitors, mobile phones, smart phones, etc.

Description

technical field [0001] The invention relates to a liquid crystal display device. Background technique [0002] Liquid crystal display devices are used in various household electrical appliances represented by clocks and calculators, measuring equipment, panels for automobiles, word processors, electronic notebooks, printers, computers, televisions, and the like. Typical liquid crystal display methods include TN (Twisted Nematic) type, STN (Super Twisted Nematic) type, DS (Dynamic Light Scattering) type, GH (Guest Host) type, and IPS (In-Plane Switching) type. , OCB (Optically Compensated Birefringence) type, ECB (Electrically Controlled Birefringence) type, VA (Vertical Alignment) type, CSH (Color Super Vertical) type, or FLC (Ferroelectric Liquid Crystal) and the like. In addition, as the driving method, the conventional static driving has been changed to multiplex driving, and the simple matrix method, and recently the active matrix (AM) method using TFT (thin film transi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/1335C09K19/12C09K19/20C09K19/30C09K19/34C09K19/42C09K19/60G02B5/20G02F1/13C09B25/00C09B47/04C09B67/20
CPCC09B25/00C09B47/04C09K19/12C09K19/20C09K19/30C09K19/34C09K19/42C09K19/60G02B5/20G02F1/13G02F1/1335
Inventor 栗山毅谷口士朗船仓省二大石健太郎
Owner DIC CORP
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