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Liquid crystal display

A technology of liquid crystal display and liquid crystal molecules, which is applied in the direction of instruments, identification devices, nonlinear optics, etc., and can solve the problem of narrow viewing angle of TN-LCD

Inactive Publication Date: 2005-01-26
SAMSUNG DISPLAY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Unfortunately, this type of TN-LCD has a narrow viewing angle

Method used

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  • Liquid crystal display
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  • Liquid crystal display

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0069] A nematic liquid crystal with a chiral dopant and a pure nematic liquid crystal were used as the liquid crystal layer 70, and the final viewing angle in each case was measured.

[0070] The amount of refractive anisotropy Δn of the liquid crystal layer 70 was 0.09, the thickness of the liquid crystal layer was 4.5 μm, and the alignment film 90 was not rubbed. In addition, the two electrodes 30 and 40 are formed in the horizontal direction, and the transmission axes of the polarizers 50 and 60 attached to the outer surfaces of the two substrates 10 and 20 form an angle of 90 degrees with each other. The transmission axis of one of the polarizers is at an angle of 45 degrees relative to the two electrodes 30 and 40 , while the transmission axis of the other polarizer is at an angle of 135 degrees relative to the two electrodes 30 and 40 . These angles are measured by setting the right side of the horizontal to 0 degrees.

[0071] Fig. 6 is a view diagram of the EOC-LCD o...

example 2

[0075] In the same state as in Example 1, the alignment films 90 formed on the two substrates 10 and 20 were subjected to rubbing, and the final viewing angle was measured in each case.

[0076]FIG. 8 shows the obtained EOC- Viewing angle diagram of LCD.

[0077] FIG. 9 shows the obtained EOC- Viewing angle diagram of LCD.

[0078] As shown in FIGS. 8 and 9 , by rubbing the alignment film as described above, the difference between the viewing angles in the horizontal and vertical directions and the viewing angle in the diagonal direction can be reduced, so that a more uniform viewing angle can be obtained.

example 3

[0080] The viewing angle was measured by changing the orientation directions of the polarizing plates 50 and 60 attached to the outer surfaces of the two substrates 10 and 20 while maintaining the same state as in Example 1.

[0081] What Fig. 10 shows is that when the transmission axis of the polarizer 60 adhered to the outer surface of the upper substrate 20 is set to an angle of 45 degrees with the direction of the two electrodes 30 and 40, and when the polarizer 60 adhered to the lower substrate 10 is a viewing angle diagram of the obtained EOC-LCD when the transmission axis of the polarizer 50 on the outer surface is set at an angle of 135 degrees to the direction of the two electrodes 30 and 40 .

[0082] 11 shows that when the transmission axis of the polarizer 60 adhered to the outer surface of the upper substrate 20 is set to an angle of 30 degrees, and when the transmission axis of the polarizer 50 adhered to the outer surface of the lower substrate 10 Viewing angle ...

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Abstract

A liquid crystal display device includes a first and a second substrates facing each other, a liquid crystal material layer implanted between the first and second substrates, and at least two linear electrodes formed on the first and second substrates parallel to each other. Upon applying voltage to the electrodes, a parabolic electric field drives liquid crystal molecules, and the liquid crystal molecules are arranged symmetrically in response to electric field.

Description

technical field [0001] The invention relates to a liquid crystal display. Background technique [0002] In general, a conventional liquid crystal display (LCD) includes two substrates having electrodes and liquid crystal injected therebetween. The voltage difference between the electrodes generates an electric field, and the liquid crystal molecules rearrange under the action of the electric field. Due to the rearrangement of the liquid crystal molecules, the polarization of the incident light changes. [0003] Hereinafter, a conventional LCD will be described in detail with reference to related drawings. [0004] 1A and 1B are cross-sectional views of a conventional twisted-nematic liquid crystal display (TN-LCD). The TN-LCD in FIG. 1A includes opposite transparent glass substrates 1 and 2; a liquid crystal layer 7 interposed between the substrates 1 and 2; and electrodes 3 and 4 formed on the inner surfaces of the substrates 1 and 2, respectively, And polarizers 5 and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/137G02F1/1335G02F1/1337G02F1/1341G02F1/1343G09F9/35
CPCG02F2001/133742G02F1/134363G02F1/133742
Inventor 金京贤沈政煜朴乘范宋长根李昶勋金南兴
Owner SAMSUNG DISPLAY CO LTD