Liquid crystal display device and driving method of liquid crystal display device

• US 9,224,350 B2
• Filed: 11/28/2011
• Issued: 12/29/2015
• 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
• Primary Examiner(s): Moon, Seokyun
• Application Number:
  US13/305,144
• Publication Number:
  US 20120133687A1
• Time in Patent Office: 1,492 Days
• Field of Search: None
• US Class Current: 1/1
• 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 sequentially provided in this order, comprising the steps of:

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

inputting a second image signal and a fourth image signal to a pixel in an even-numbered row in the pixel portion in the second field period and the fourth field period, respectively, the second image signal and the fourth image signal corresponding to a second two dimensional image different from the first two dimensional image;

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 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 different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period,

wherein the odd-numbered row displays exclusively a line of the first two dimensional image during the first and the third field periods and a single gray scale during the second and the fourth field periods, and

wherein the even-numbered row displays exclusively a line of the second two dimensional image during the second and the fourth field periods and the single gray scale during the first and the third field periods.

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

wherein each pixel comprises:

a transistor; and

a liquid crystal element to which the first image signal or the second 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.

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

wherein the liquid crystal display device comprises additional odd-numbered rows and additional even-numbered rows, each of the additional odd-numbered rows and the additional even-numbered rows being made of aligned pixels,

wherein the aligned pixels of the additional odd-numbered rows all emit the light having the first hue during the first field period in accordance with the first two dimensional image, and

wherein the aligned pixels of the additional even-numbered rows all emit the light having the second hue during the second field period in accordance with the second two dimensional image.

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 sequentially provided in this order, 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, the image signal for the right eye and the image signal for the left eye corresponding respectively to an image for the right eye and an image for the left eye;

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 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 different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period,

wherein the odd-numbered row displays exclusively a line of one of the image for the right eye and the image for the left eye during the first and the third field periods and a single gray scale during the second and the fourth field periods, and

wherein the even-numbered row displays exclusively a line of the other one of the image for the right eye and the image for the left eye during the second and the fourth field periods and the single gray scale during the first and the third field periods.

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

wherein each 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.

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

wherein the liquid crystal display device comprises additional odd-numbered rows and additional even-numbered rows, each of the additional odd-numbered rows and the additional even-numbered rows being made of aligned pixels,

wherein the aligned pixels of the additional odd-numbered rows all emit the light having the first hue during the first field period in accordance with the one of the image for the right eye and the image for the left eye, and

wherein the aligned pixels of the additional even-numbered rows all emit the light having the second hue during the second field period in accordance with the other of the image for the right eye and the image for the left eye.

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 sequentially provided in this order, comprising the steps of:

displaying a first image by using 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 the single gray scale in the pixel in the odd-numbered row in the pixel portion and displaying a second image by using the pixel in the even-numbered row in the pixel portion, in the second field period and the fourth field period, the second image being different from the first image;

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 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 different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period,

wherein the odd-numbered row displays exclusively a line of the first image during the first and the third field periods and the single gray scale during the second and the fourth field periods, and

wherein the even-numbered row displays exclusively a line of the second image during the second and the fourth field periods and the single gray scale during the first and the third field periods.

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

wherein each pixel comprises:

a transistor; and

a liquid crystal element to which an image signal with data of the first image, the second 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.

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

wherein the liquid crystal display device comprises additional odd-numbered rows and additional even-numbered rows, each of the additional odd-numbered rows and the additional even-numbered rows being made of aligned pixels,

wherein the aligned pixels of the additional odd-numbered rows all emit the light having the first hue during the first field period in accordance with the first image, and

wherein the aligned pixels of the additional even-numbered rows all emit the light having the second hue during the second field period in accordance with the second image.

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 sequentially provided in this order, comprising the steps of:

displaying one of an image for a right eye and an image for a left eye by using 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, the image for the right eye being different from the image for the left eye;

displaying the 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 by using 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 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 different from the first hue and the second hue to the pixel portion from the light supply portion in the third field period,

wherein the odd-numbered row displays exclusively a line of the one of the image for the right eye and the image for the left eye during the first and the third field periods and the single gray scale during the second and the fourth field periods, and

wherein the even-numbered row displays exclusively a line of the other one of the image for the right eye and the image for the left eye during the second and the fourth field periods and the single gray scale during the first and the third field periods.

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

wherein each pixel comprises:

a transistor; and

a liquid crystal element to which an image signal with data of the image for the right eye, image data of 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, and

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

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

wherein the liquid crystal display device comprises additional odd-numbered rows and additional even-numbered rows, each of the additional odd-numbered rows and the additional even-numbered rows being made of aligned pixels,

wherein the aligned pixels of the additional odd-numbered rows all emit the light having the first hue during the first field period in accordance with the one of the image for the right eye and the image for the left eye, and

wherein the aligned pixels of the additional even-numbered rows all emit the light having the second hue during the second field period in accordance with the other of the image for the right eye and the image for the left eye.

9. A liquid crystal display device, comprising:

a pixel portion comprising odd-numbered rows of pixels and even-numbered rows of pixels, the liquid crystal display device being configured so that when used;

one frame period includes at least a first field period, a second field period, a third field period, and a fourth field period sequentially provided in this order, an image for one of a right eye and a left eye is displayed in the pixel portion by the odd-numbered rows of pixels during the first field period and the third field period, and an image for the other of the right eye and the left eye is displayed in the pixel portion by the even-numbered rows of pixels in the second field period and in the fourth field period,

light having a first hue is transmitted to the pixel portion from a light supply portion in the first field period,

light having a second hue different from the first hue is transmitted to the pixel portion from the light supply portion in the second field period, and

light having a third hue different from the first hue and from the second hue is transmitted to the pixel portion from the light supply portion in the third field period,

wherein a single grayscale period is displayed by the even-numbered rows of pixels during the first field period and the third field period and by the odd-numbered rows of pixels during the second field period and the fourth field period,

wherein the image for the right eye is displayed exclusively by one of a first display region constituted only by the odd-numbered rows of pixels and a second display region constituted only by the even-numbered rows of pixels, and

wherein the image for the left eye is displayed exclusively by the other one of the first display region and the second display region.

11. The liquid crystal display device according to claim 9, further comprising:

a light-blocking portion controlling light transmittance of a first region defined by the odd-numbered rows of pixels and light transmittance of a second region defined by the even-numbered rows of pixels;

wherein the light transmittance of one of the first region and the second region is lowered when the image for the right eye is displayed, and

wherein the light transmittance of the other one of the first region and the second region is lowered when the image for the left eye is displayed.

10. A liquid crystal display device, comprising:

a pixel portion comprising odd-numbered rows of pixels and even-numbered rows of pixels, the liquid crystal display device being configured so that when used;

one frame period includes at least a first field period, a second field period, a third field period, and a fourth field period sequentially provided in this order, an image for one of a right eye and a left eye is displayed in the pixel portion by the odd-numbered rows of pixels during the first field period and the third field period, and an image for the other of the right eye and the left eye is displayed in the pixel portion by the even-numbered rows of pixels in the second field period and in the fourth field period,

at least light having a first hue and light having a second hue different from the first hue are transmitted to the pixel portion from a light supply portion in the first field period and in the third field period, respectively,

at least light having a third hue and light having a fourth hue different from the third hue are transmitted to the pixel portion from the light supply portion in the second field period and in the fourth field period, respectively, and

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

wherein a single grayscale period is displayed by the even-numbered rows of pixels during the first field period and the third field period and by the odd-numbered rows of pixels during the second field period and the fourth field period,

wherein the image for the right eye is displayed exclusively by one of a first display region constituted only by the odd-numbered rows of pixels and a second display region constituted only by the even-numbered rows of pixels, and

wherein the image for the left eye is displayed exclusively by the other one of the first display region and the second display region.

12. The liquid crystal display device according to claim 10, further comprising:

a light-blocking portion controlling light transmittance of a first region defined by the odd-numbered rows of pixels and light transmittance of a second region defined by the even-numbered rows of pixels;

wherein the light transmittance of one of the first region and the second region is lowered when the image for the right eye is displayed, and

wherein the light transmittance of the other one of the first region and the second region is lowered when the image for the left eye is displayed.