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LCD device and interleaved polarizing film

A liquid crystal display, polarizing film technology, applied in optics, instruments, polarizing elements, etc., can solve problems such as unable to achieve symmetrical viewing angles

Inactive Publication Date: 2009-01-21
TPO DISPLAY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of C-compensation film and biaxial compensation film is usually much higher than the cost of A-compensation film
In addition, combining C-compensation film and A-compensation film or biaxial film usually cannot achieve symmetrical viewing angle

Method used

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  • LCD device and interleaved polarizing film
  • LCD device and interleaved polarizing film
  • LCD device and interleaved polarizing film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] Figure 10 A schematic structural diagram of an in-plane drive (IPS) liquid crystal display 100 a with multiple film compensation is shown. The same applies to the fringe field driven (FFS) liquid crystal display. A first substrate 122, such as a glass or plastic substrate, with a first alignment film (grinding angle 0°) serves as the lower substrate 122 of the display. A second substrate 124 with a second alignment film (grinding angle 0°) serves as the upper substrate of the display. A liquid crystal layer 125 is sandwiched between the first substrate 122 and the second substrate 124 . The first substrate 122 , the liquid crystal layer 125 and the second substrate 124 form a liquid crystal cell 120 . A first polarizing film 110 (with a transmission axis angle of 90°) is stacked on the outside of the first substrate 122 and on the opposite side of the liquid crystal layer 125 . A second polarizing film 150 (transmission axis angle 0°) is stacked on the outside of t...

Embodiment 2

[0061] Embodiment 2 is mainly set up according to the design of Embodiment 1. The difference lies in the liquid crystal display 100b of the second embodiment, its positive A-compensation film 130 (optical axis angle 0°) and negative A-compensation film 140 ( The position of the optical axis angle 90°) is interchanged. Its structural diagram is as Figure 13 shown, and its compensation principle is as Figure 14 Shown in Poincare (Poincaré) ball. The parameters of the optimized positive A-compensation film and negative A-compensation film are listed in Table 3. Figure 15A-Figure 15C Simulation results of an in-plane driven (IPS) type liquid crystal display with a positive A-compensation film and a negative A-compensation film are shown. In the viewing cone of ±80°, the contrast ratio can reach more than 200:1.

[0062] table 3

[0063] film form

Embodiment 3

[0065] The compensation film can also be disposed between the lower substrate and the lower polarizing film. Figure 16 A schematic diagram of the structure of a horizontal electric field drive (IPS) type liquid crystal display 100c of this embodiment is shown. The first polarizing film 110 (transmission axis angle 0°) is stacked on the outside of the first substrate 122 and on the opposite side of the liquid crystal layer 125 . The second polarizing film 150 (with a transmission axis angle of 90°) is stacked on the outside of the second substrate 124 and on the opposite side of the liquid crystal layer 125 . A positive hyperbolic uniaxial A-compensation film 130 (optical axis angle 0°) and a negative hyperbolic uniaxial A-compensation film 140 (optical axis angle 90°) are disposed on the first substrate 122 and the first polarizing film Between 110. The positive hyperbolic uniaxial A-compensation film 130 is disposed between the first substrate 122 and the first polarizing ...

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PUM

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Abstract

The invention provides a LCD and a staggered light polarizing film with wide visual angle. And the LCD with wide visual angle has multi-film compensation function. And the invention provides a LCD with a positive birefringent single-axis A-compensation film and a negative one to improve light leakage in dark state; as external voltage is not applied, liquid crystal layer is uniformly aligned between first and second substrates, and driven by horizontal electric field, materially; by compensation, it can largely reduce light leak and enlarge visual angle.

Description

technical field [0001] The present invention relates to a liquid crystal display with a wide viewing angle with multi-film compensation, in particular to a liquid crystal display with a wide viewing angle, by providing a positive birefringent uniaxial film and a negative birefringent Refractive uniaxial film compensation to improve light leakage in dark state. Background technique [0002] Liquid crystal displays (LCDs) have been widely used in the field of information display. Due to the optical anisotropy of the liquid crystal material itself, when viewed from different directions, different effective birefringences are seen for the incident light. Therefore, the viewing angle of a conventional liquid crystal display is not as wide as that of a self-luminous display, such as a cathode ray tube (CRT), an organic electroluminescent display (OLED) and a plasma display (PDP). In order to make liquid crystal displays have wide viewing angles, several types of displays that us...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1335G02B5/30
Inventor 朱新羽吴诗聪
Owner TPO DISPLAY