Liquid crystal display device and electronic apparatus
View Patent ↗A liquid crystal display device with a vertical alignment mode in which a high image quality and a wide viewing angle are secured includes a liquid crystal layer having an initial state of vertical alignment interposed between a pair of substrates opposite to each other. A plurality of alignment control structures including a dielectric protrusion protruded toward the liquid crystal layer from the inner surface of the substrate is provided in a dot area constituting one unit of display. When that the dielectric constant of the dielectric protrusion is ∈ t1 , the dielectric constant of a major axis direction of liquid crystal molecules constituting the liquid crystal layer is ∈ // , and the dielectric constant of a minor axis direction thereof is ∈ ⊥ , the dielectric constants satisfy the expression ∈ ⊥ >∈ // >∈ t1 .
1. A liquid crystal display device, comprising:
a dot area constituting a unit of display;
a pair of substrates;
a liquid crystal layer including liquid crystal molecules having a negative dielectric anisotropy, the liquid crystal layer being interposed between the pair of substrates;
a dielectric protrusion formed at a side of one substrate of the pair of substrates, the liquid crystal molecules and the dielectric protrusion satisfying the expression:
∈ ⊥ >∈ // >∈ t1
∈ t1 being a dielectric constant of the dielectric protrusion;
∈ // being a dielectric constant of a major axis direction of the liquid crystal molecules; and
∈ ⊥ being a dielectric constant of a minor axis direction thereof; and
an alignment control structure formed at a side of another substrate of the pair of substrates, the alignment control structure being provided at a position so as not to overlap with the dielectric protrusion in a plan view.
2. The liquid crystal display device according to claim 1 , further comprising:
an electrode provided in the dot area;
the alignment control structure being one of an opening slit formed with the electrode and an edge portion of the electrode.
3. The liquid crystal display device according to claim 1 , further comprising:
an electrode provided in the dot area;
the alignment control structure being another dielectric protrusion having a dielectric constant of ∈ t2 and formed on the electrode, and when the dielectric constant of the liquid crystal molecules is ∈ // , the expression ∈ // >∈ t2 is satisfied.
4. The liquid crystal display device according to claim 1 , further comprising:
an electrode provided in the dot area;
the alignment control structure including:
an opening slit formed with the electrode; and
another dielectric protrusion provided inside the opening slit, the dielectric protrusion having a second dielectric constant ∈ t2 , which satisfies the expression ∈ // >∈ t2 .
5. The liquid crystal display device according to claim 1 , further comprising:
a reflective display area in the dot area to perform reflective display; and
a transmissive display area in the dot area to perform transmissive display.
6. An electronic apparatus, comprising:
the liquid crystal display device according to claim 1 .