IP Library › Granted Patent US 8,253,911
Granted Patent B2
US 8,253,911 · App. 12/115,319 · Granted Aug 28, 2012

Liquid crystal display device

Assignee: Semiconductor Energy Laboratory Co., Ltd.
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Quick Facts
Patent No.
US 8,253,911
App. No.
12/115,319
Granted
Aug 28, 2012
Kind
B2
Abstract

To improve viewing angle characteristics by varying voltage which is applied between liquid crystal elements. A liquid crystal display device in which one pixel is provided with three or more liquid crystal elements and the level of voltage which is applied is varied between the liquid crystal elements is varied. In order to vary the level of the voltage which is applied between the liquid crystal elements, an element which divides the applied voltage is provided. In order to vary the level of the applied voltage, a capacitor, a resistor, a transistor, or the like is used. Viewing angle characteristics can be improved by varying the level of the voltage which is applied between the liquid crystal elements.

Claims (15)

1. A liquid crystal display device comprising:

a pixel comprising:

a first switch, and a second switch;

a transistor;

a first liquid crystal element, a second liquid crystal element, and a third liquid crystal element;

a first capacitor, a second capacitor, and a third capacitor;

a first wiring electrically connected to one of electrodes of the first liquid crystal element and one of terminals of the first capacitor through the first switch;

wherein the first wiring is electrically connected, through the transistor, to the other of the terminals of the first capacitor, one of terminals of the second capacitor, and one of terminals of the third capacitor;

wherein a second wiring is electrically connected to one of electrodes of the second liquid crystal element and the other of the terminals of the second capacitor through the second switch,

wherein the other of the terminals of the third capacitor is electrically connected to one of electrodes of the third liquid crystal element, and

wherein the other of the electrodes of the first liquid crystal element, the other of the electrodes of the second liquid crystal element, and the other of the electrodes of the third liquid crystal element are electrically connected to each other.

2. The liquid crystal display device according to claim 1 , wherein the first switch and the second switch are transistors.

3. The liquid crystal display device according to claim 1 ,

wherein a storage capacitor is electrically connected to each of the one of the terminals of the first liquid crystal element, the one of the terminals of the second liquid crystal element, and the one of the terminals of the third liquid crystal element; and

wherein the storage capacitor is electrically connected to a wiring having a constant potential.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded May 21, 2008
From: KIMURA, HAJIME
To: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Reel/Frame 020981/0192 →
Priority Claims (1)
JP 2007-133533 · May 18, 2007 · national
Continuity (1)
Related Publication 20080284929A1 · Nov 20, 2008