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Semi transmission liquid crystal display device

A liquid crystal display device, semi-transmissive technology, applied in nonlinear optics, instruments, optics, etc., can solve problems such as designing device structure and processing signals, and achieve the effects of increasing stability, increasing aperture ratio, and improving reliability

Inactive Publication Date: 2004-02-11
NEC LCD TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If an attempt is made to force the device to display an image, the polarities of the image signal input to the reflective area and the image signal input to the transmissive area must be made opposite to each other, causing great difficulty in designing the structure of the device and processing the signal

Method used

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  • Semi transmission liquid crystal display device

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0074] The transflective liquid crystal display device according to the first embodiment of the present invention has: a reflective region, wherein the liquid crystal molecules are driven by a vertical electric field; and a transmissive region, wherein the liquid crystal molecules are driven by a horizontal electric field. 1( a ) is a cross-sectional view showing how to optically arrange the components constituting the unit of the transflective liquid crystal display device 52 of the first embodiment, and FIG. 1( b ) shows the During this device, polarizers 21a, 21b, liquid crystal layer 13, and one-half wavelength (λ / 2) plate 29 are oriented to each other at an alignment angle, and Fig. 1 (c) shows how these components work in the reflective region and operate in the transmissive region.

[0075] As shown in Figure 1 (a), the transflective liquid crystal display device 52 includes: a lower substrate 11; an opposite substrate 12; a liquid crystal layer 13, which is sandwiched ...

no. 2 example

[0081] In the transflective liquid crystal display device according to the second embodiment of the present invention, the liquid crystal molecules are driven by a horizontal electric field in the reflective region and the transmissive region. 4( a ) is a cross-sectional view showing how to optically arrange the cells of the semi-transmissive liquid crystal display device 53 of the second embodiment, and FIG. 4( b ) shows when the device is viewed from the opposite substrate 12 side , the alignment angles at which the polarizers 21a, 21b, the liquid crystal layer 13 and the half-wave plate 29 are oriented to each other, and FIG. 4(c) shows how these components operate in the reflective and transmissive regions.

[0082] As shown in Figure 4 (a), since the semi-transmissive liquid crystal display device 53 of the second embodiment has the same cross-sectional structure as that shown in Figure 20 (a), except that the device 53 has a half-wavelength plate 29, Therefore, the descr...

no. 3 example

[0085] Although in the first and second embodiments, only how the liquid crystal display device is configured to optically arrange components and how to operate has been described, in the third embodiment, reference will be made to Figure 5 Turning to FIG. 10, how to establish the layered structure and electrode constitution employed in the second embodiment will be explained. Figure 5 is a plan view of the liquid crystal display device 54 of the third embodiment, Figure 6 is a plan view of an interconnection level formed with electrodes 7 provided in the transmissive region and provided for generating a horizontal electric field, Figure 7 is a plan view of the interconnection level formed with the electrode 7 provided in the reflective area and provided for generating a horizontal electric field. Figure 8(a) is along the Figure 5 The cross-sectional view taken along the line I-I, and Fig. 8(b) is along the Figure 5 A cross-sectional view taken on line IV-IV. Figure ...

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PUM

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Abstract

In a semi-transmissive liquid crystal display device having a reflective region 5 and a transmissive region therein, a one-half wavelength plate 29 is disposed between a lower substrate 11 and a polarizer 21a provided on a side of the lower substrate. This makes liquid crystal molecules in at least the transmissive region 6 driven by a horizontal electric field and allows the device to operate in a normally-black mode in both the reflective region 5 and the transmissive region 6, realizing a semi-transmissive liquid crystal display device having wide viewing angle characteristics.

Description

technical field [0001] The present invention relates to a liquid crystal display device, and more particularly, to a transflective liquid crystal display device having: a reflective area for performing a display function by reflecting light incident from the outside; and a transmissive area for performing a display function by using Light from a light source provided at the rear side of the device is transmitted through the transmissive area to perform a display function. Background technique [0002] Conventionally, two main types of liquid crystal display devices are known. One of these two main devices is a reflective liquid crystal display device, which is provided with a reflector inside so that, by using the reflector, light incident from the outside and used as a light source for display is reflected, and light used as a light source is omitted. background light needs. The other is a transmissive liquid crystal display device, which is provided with a background lig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/139G02F1/1333G02F1/1335G02F1/13357G02F1/13363G02F1/1343
CPCG02F1/133371G02F1/134363G02F1/133555G02F2001/133638G02F1/133638G02F1/1335
Inventor 坂本道昭渡边诚西田真一
Owner NEC LCD TECH CORP
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