Liquid Crystal Display Device and Driving Method of Liquid Crystal Display Device

• US 20120133687A1
• Filed: 11/28/2011
• Published: 05/31/2012
• Est. Priority Date: 11/30/2010
• Status: Active Grant

• Current Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Original Assignee: Semiconductor Energy Laboratory Co., Ltd.
• Inventors: Hirakata, Yoshiharu, Yamazaki, Shunpei
• Granted Patent: US 9,224,350 B2
• Time in Patent Office: Days
• US Class Current: 345/690
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/2025 the sub-frames having all the same time duration
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

In one frame period, a field period in which an image signal is input to pixels in odd-numbered rows and a field period in which an image signal is input to pixels in even-numbered rows are alternately provided. Hues of light transmitted to a pixel portion from a light supply portion are different between two sequential field periods. Further, in a plurality of field periods in one frame period, hues of light transmitted to the pixel portion from the light supply portion are different among a plurality of field periods in which image signals are input to the pixels in the odd-numbered rows, and/or those are different among a plurality of field periods in which image signals are input to the pixels in the even-numbered rows.

Claims

1. A driving method of a liquid crystal display device, using one frame period including at least a first field period, a second field period, a third field period, and a fourth field period which are sequentially provided, comprising the steps of:

inputting an image signal to a pixel in an odd-numbered row in a pixel portion in the first field period and the third field period;

inputting an image signal to a pixel in an even-numbered row in the pixel portion in the second field period and the fourth field period;

transmitting light having a first hue to the pixel portion from a light supply portion in the first field period;

transmitting light having a second hue which is different from the first hue to the pixel portion from the light supply portion in the second field period; and

transmitting light having a third hue which is different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period.

2. The driving method of a liquid crystal display device, according to claim 1,

wherein the pixel comprises:

a transistor; and

a liquid crystal element to which the image signal is applied through the transistor,

wherein the transistor includes an oxide semiconductor in an active layer, and

wherein a liquid crystal layer in the liquid crystal element includes liquid crystal exhibiting a blue phase.

3. A driving method of a liquid crystal display device, using one frame period including at least a first field period, a second field period, a third field period, and a fourth field period which are sequentially provided, comprising the steps of:

inputting one of an image signal for a right eye and an image signal for a left eye to a pixel in an odd-numbered row in a pixel portion in the first field period and the third field period;

inputting the other of the image signal for the right eye and the image signal for the left eye to a pixel in an even-numbered row in the pixel portion in the second field period and the fourth field period;

transmitting light having a first hue to the pixel portion from a light supply portion in the first field period;

transmitting light having a second hue which is different from the first hue to the pixel portion from the light supply portion in the second field period; and

transmitting light having a third hue which is different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period.

4. The driving method of a liquid crystal display device, according to claim 3,

wherein the pixel comprises:

a transistor; and

a liquid crystal element to which the image signal for the right eye or the image signal for the left eye is applied through the transistor,

wherein the transistor includes an oxide semiconductor in an active layer, and

wherein a liquid crystal layer in the liquid crystal element includes liquid crystal exhibiting a blue phase.

5. A driving method of a liquid crystal display device, using one frame period including at least a first field period, a second field period, a third field period, and a fourth field period which are sequentially provided, comprising the steps of:

displaying an image in a pixel in an odd-numbered row in a pixel portion and displaying a single gray scale in a pixel in an even-numbered row in the pixel portion, in the first field period and the third field period;

displaying a single gray scale in the pixel in the odd-numbered row in the pixel portion and displaying an image in the pixel in the even-numbered row in the pixel portion, in the second field period and the fourth field period;

transmitting light having a first hue to the pixel portion from a light supply portion in the first field period;

transmitting light having a second hue which is different from the first hue to the pixel portion from the light supply portion in the second field period; and

transmitting light having a third hue which is different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period.

6. The driving method of a liquid crystal display device, according to claim 5,

wherein the pixel comprises:

a transistor; and

a liquid crystal element to which an image signal with data of the image or a blanking signal with data of the single gray scale is applied through the transistor,

wherein the transistor includes an oxide semiconductor in an active layer, and

wherein a liquid crystal layer in the liquid crystal element includes liquid crystal exhibiting a blue phase.

7. A driving method of a liquid crystal display device, using one frame period including at least a first field period, a second field period, a third field period, and a fourth field period which are sequentially provided, comprising the steps of:

displaying one of an image for a right eye and an image for a left eye in a pixel in an odd-numbered row in a pixel portion and displaying a single gray scale in a pixel in an even-numbered row in the pixel portion, in the first field period and the third field period;

displaying a single gray scale in the pixel in the odd-numbered row in the pixel portion and displaying the other of the image for the right eye and the image for the left eye in the pixel in the even-numbered row in the pixel portion, in the second field period and the fourth field period;

transmitting light having a first hue to the pixel portion from a light supply portion in the first field period;

transmitting light having a second hue which is different from the first hue to the pixel portion from the light supply portion in the second field period; and

transmitting light having a third hue which is different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period.

8. The driving method of a liquid crystal display device, according to claim 7,

wherein the pixel comprises:

a transistor; and

a liquid crystal element to which an image signal with data of the image for the right eye or the image for the left eye or a blanking signal with data of the single gray scale is applied through the transistor,

wherein the transistor includes an oxide semiconductor in an active layer, an

wherein a liquid crystal layer in the liquid crystal element includes liquid crystal exhibiting a blue phase.

9. A liquid crystal display device, comprising:

a pixel portion,

wherein one frame period includes at least a field period in which an image for a right eye is displayed in the pixel portion and a field period in which an image for a left eye is displayed in the pixel portion,

wherein light having a first hue is transmitted to the pixel portion from a light supply portion in the field period in which the image for the right eye is displayed in the pixel portion, and

wherein light having a second hue which is different from the first hue is transmitted to the pixel portion from the light supply portion in the field period in which the image for the left eye is displayed in the pixel portion.

10. A liquid crystal display device, comprising:

a pixel portion,

wherein one frame period includes at least a field period in which an image for a right eye is displayed in the pixel portion and a field period in which an image for a left eye is displayed in the pixel portion,

wherein at least light having a first hue and light having a second hue which is different from the first hue are transmitted to the pixel portion from a light supply portion in the field period in which the image for the right eye is displayed in the pixel portion,

wherein at least light having a third hue and light having a fourth hue which is different from the third hue are transmitted to the pixel portion from the light supply portion in the field period in which the image for the left eye is displayed in the pixel portion, and

wherein one of the first hue and the second hue is different from one of the third hue and the fourth hue.