Liquid crystal display device

Abstract

The invention provides a liquid crystal display device to surely prevent light leakage from occurring in a transmissive display portion and to improve contrast. A liquid crystal layer (50) arranged between an element substrate (first substrate) (20) and an opposition substrate (second substrate) (60). Each pixel (3) has a tranmissive display portion (12) for performing a tranmissive display operation and a reflective display portion (14) for performing a reflective display operation. The element substrate (first substrate) (20) comprises a pixel electrode (first electrode) (36) for performing the directional control of the liquid crystal molecule of the liquid crystal layer (50) and a common electrode (second electrode)(42). Slits (S1) are formed on at least one of the pixel electrode (first electrode) (36) or the common electrode (second electrode)(42) to extend along a perpendicular axis that is perpendicular to an interface of the tranmissive display portion (12) and the reflective display portion(14), therefore the initial orientation of the liquid crystal molecule is basically paralleded to the extending direction of the slots(S1).

Description

technical field [0001] The present invention relates to a pixel constituting a display unit having a transmissive display unit for transmissive display and a reflective display unit for reflective display, wherein the first substrate includes a pair of A liquid crystal display device in which the alignment of the liquid crystal molecules in the liquid crystal layer is controlled by the first electrode and the second electrode. Background technique [0002] In liquid crystal display devices for portable devices represented by mobile phones, PDAs (Personal Digital Assistants), digital still cameras, digital video cameras, etc., high reliability is required in various environments from indoors to outdoors. visibility. Against such a background, in recent years, a so-called transflective liquid crystal display device having both a transmissive display portion and a reflective display portion in a sub-pixel has attracted attention. [0003] Conventionally, a so-called longitudi...

AI Technical Summary

Problems solved by technology

However, the following problem was pointed out: if the transverse electric field driving method is applied with the conventional configuration of adjusting the cell gap, the transmissive display part becomes normally black and the reflective display part becomes normally white.

In order to make it display normally, that is, both the transmissive display part and the reflective display part are normally black or normally white, when the technology disclosed by Patent Document 1 and Patent Document 2 is adopted, there may be a problem that although the transmissive display can obtain sufficient display characteristics, but there are problems such as insufficient reflectance in reflective display, and the composition of the panel becomes complicated

On the other hand, it is possible to drive the liquid crystal molecules differently in the transmissive display part and the reflective display part so that both the transmissive display part and the reflective display part are normally black or normally white, but in this case there is a difference between the transmissive display part and the reflective display part. Contrast reduction due to light leakage in the transmissive display near the border

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