Liquid crystal display and electronic apparatus

a technology of electronic equipment and liquid crystal display, which is applied in the direction of instruments, non-linear optics, optics, etc., can solve the problems of uneven proportion of the area of the panel, defective regions, grainy and uneven, etc., and achieve the effect of low cost and high display quality

Inactive Publication Date: 2006-04-13
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention relates to a liquid crystal display with improved alignment control for the liquid crystal molecules. By using protrusions on the panel, the tilt of the liquid crystal molecules can be controlled, resulting in a more uniform display quality. However, the use of too many protrusions can increase the time required for injecting the liquid crystal, which negatively impacts the manufacturing process. To address this issue, the invention proposes a structure with unidirectional protrusions that do not interrupt the flow of the liquid crystal. By arranging the protrusions in parallel and in low density with the predetermined edge of the panel, the flow resistance of the liquid crystal is minimized, allowing for smooth injection. The invention also provides a method for reducing the operation time of the manufacturing process by decreasing the delay in the time required for injecting the liquid crystal.

Problems solved by technology

Under such conditions, some parts of the display region will have different optical characteristics, and, as a result, these regions will be defective in that they will appear grainy and uneven.
Unfortunately, when dielectric protrusions, are formed as alignment controlling device and the proportion of the area of the panel covered by the protrusions become greater, the protrusions get in the way and the time required for injecting the liquid crystal is increased.
In particular, for a multi-gap structure, since the thickness of the cell in the reflective display region is small, the increase in the time required for injecting the liquid crystal becomes long.

Method used

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  • Liquid crystal display and electronic apparatus
  • Liquid crystal display and electronic apparatus
  • Liquid crystal display and electronic apparatus

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first embodiment

[0059]FIG. 5 is a plan view and a cross-sectional view of a liquid crystal display according to this exemplary embodiment and is equivalent to the schematic view of FIG. 3 illustrating the first exemplary embodiment of the invention. Parts and components according to this embodiment that are the same as those in the first embodiment are indicated by the same reference numerals.

[0060] A liquid crystal display 200 according to this exemplary embodiment is a transmissive liquid crystal display not having a reflective display region. The liquid crystal display 200 according to this embodiment has dot regions including pixel electrodes 31 inside of regions defined by data lines 9 and scanning lines 13, as illustrated in FIG. 5(a). Each of the dot regions includes one colored layer corresponding to one of the three primary colors. Three dot regions (D1, D2, and D3) form a pixel including a blue layer 22B, a green layer 22G, and a red layer 22R.

[0061] Next, the cross-sectional structure o...

second embodiment

[0080] For example, in the first exemplary embodiment, only the longitudinal axes of the protrusions 28 were optimized relative to the flow direction of the liquid crystal. In addition, the density of the protrusions 28 may also be optimized in the same manner as in the In other words, the intervals of the protrusions 28 aligned in parallel with the panel edge 100A having the liquid crystal inlet H (in the X-axis direction) may be wider than the intervals between the protrusions 28 aligned orthogonally to the panel edge 100A (in the Y-axis direction). In this way, the liquid crystal injection time can be shortened even more.

[0081] The liquid crystal display according to the above-mentioned exemplary embodiment of the invention is an active matrix liquid crystal display having a TDF as a switching element. The liquid crystal display according to the invention may be an active matrix liquid crystal display having a TFT as a switching element or a passive matrix liquid crystal display...

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Abstract

To reduce the operation time of the manufacturing process by decreasing the delay in the time required for injecting the liquid crystal due to the projections formed on the panel for controlling the alignment of the liquid crystal. Protrusions for controlling the alignment of liquid crystal are disposed throughout a panel. The longitudinal axes of the protrusions are arranged so that they are not in parallel with (or, more specifically, they are substantially orthogonal to) an edge of the panel having a liquid crystal inlet. In this way, the flow resistance of the liquid crystal is reduced, and the liquid crystal can be injected smoothly.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of Invention [0002] Aspects of the invention can relate to a liquid crystal display and an electronic apparatus. More specifically, the invention can relate to a liquid crystal display including vertically aligned liquid crystal and providing an image with a high contrast and a wide viewing angle. [0003] 2. Description of Related Art [0004] Related art liquid crystal displays can include transreflective liquid crystal displays having a reflective mode and a transmissive mode. One of such transreflective liquid crystal displays includes a liquid crystal layer interposed between an upper substrate and a lower substrate. On the inner surface of the lower substrate there is a metal reflective film, which, for example, is composed of aluminum, having a window for transmitting light. The reflective film functions as a transreflective plate. In such a case, in the reflective mode, external light entering from the upper substrate passes through th...

Claims

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Application Information

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Patent Type & AuthorityApplications(United States)
IPC IPC(8): G02F1/1335G02F1/1337G02F1/1333G02F1/1341G02F1/1343
CPCG02F1/1341G02F1/133707G02F1/1337
InventorKURASAWA, HAYATO
OwnerSEIKO EPSON CORP