Display device, method of driving display device, and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9870738-B2
Application number	US-201514614981-A
Country	US
Kind code	B2
Filing date	Feb 5, 2015
Priority date	Feb 21, 2014
Publication date	Jan 16, 2018
Grant date	Jan 16, 2018

Abstract

A display device includes: a display section that has pixels; and a driving section that drives the display section on the basis of luminance information including a plurality of sub-luminance information pieces. The driving section drives the pixels in a time-division manner on the basis of each sub-luminance information piece during a single display period or a plurality of display periods which is set in each sub-luminance information piece. One or both of a timing of start of each display period and the number of the display periods are changeable.

First claim

What is claimed is:

1. A display device comprising:
a display section including a plurality of pixels;
a driving section that drives the display section on the basis of luminance information including a plurality of sub-luminance information pieces; and
a sub-frame generation circuitry configured to generate a first sub-frame image and a second sub-frame image respectively corresponding to first and second sub-luminance information pieces, wherein a range of a value of the luminance information is divided into a plurality of grayscale ranges corresponding to the respective sub-luminance information pieces, the first sub-frame image corresponding to a low grayscale range that is equal to or less than a threshold value and the second sub-frame image corresponding to a high grayscale range that is greater than the threshold value,
wherein the sub-luminance information pieces are each a luminance information component in the corresponding one of the grayscale images,
wherein the driving section drives the pixels in a time-division manner to drive the display section using the first and second sub-frame images that are generated on the basis of each the respective sub-luminance information pieces during at least first, second and third display periods, with a first quenching period separating the first and second display periods and a second quenching period separating the second and third display periods, the first, second and third display periods being respectively set in each sub-luminance information piece,
wherein the driving section sets the third display period of the first sub-luminance information piece adjacent to the first display period of the second sub-luminance information piece, and the driving section sets the third display period of the second sub-luminance information piece adjacent to the first display period of the first sub-luminance information piece, and
wherein one or more of a timing of start and end of each display period and the number of the display periods are changeable.

2. The display device according to claim 1 ,
wherein a time length of the final period among the of at least first, second and third display periods, which are set in the first sub-luminance information piece, is longer than a time length of the first period, and a time length of the first period of the at least first, second and third among display periods, which are set in the second sub-luminance information piece, is longer than a time length of the final period.

3. The display device according to claim 1 ,
wherein a time length of the first period among the at least first, second and third display periods, which is set in the first sub-luminance information piece, is longer than a time length of the final period, and a time length of the final period among the at least first, second and third display periods, which is set in the second sub-luminance information piece, is longer than a time length of the first period.

4. The display device according to claim 1 ,
wherein the driving section determines one or more of a timing of start and end of each display period and the number of the display periods on the basis of an amount of motion of a frame image.

5. The display device according to claim 1 ,
wherein the driving section determines one or more of a timing of start and end of each display period and the number of the display periods on the basis of a proportion of an image part with motion in a frame image.

6. The display device according to claim 1 , further comprising
a correction section that corrects the corresponding sub-luminance information piece on the basis of a length of each display period.

7. The display device according to claim 1 , further comprising
a signal generation section that divides a range of a value of input luminance information into a plurality of gray scale ranges and acquires a luminance information component in each grayscale range of the input luminance information, as each sub-luminance information piece.

8. A display device comprising:
a display section including a plurality of pixels;
a light emitting section; and
a driving section that drives the display section and the light emitting section on the basis of luminance information including a plurality of sub-luminance information pieces; and
a sub-frame generation circuitry configured to generate a first sub-frame image and a second sub-frame image respectively corresponding to first and second sub-luminance information pieces, wherein a range of a value of the luminance information is divided into a plurality of grayscale ranges corresponding to the respective sub-luminance information pieces, the first sub-frame image corresponding to a low grayscale range that is equal to or less than a threshold value and the second sub-frame image corresponding to a high grayscale range that is greater than the threshold value,
wherein the sub-luminance information pieces are each a luminance information component in the corresponding one of the grayscale images,
wherein the driving section drives the pixels in a time-division manner to drive the display section using the first and second sub-frame images that are generated on the basis of each the respective sub-luminance information pieces, and drives the light emitting section during at least first, second and third light emitting periods, with a first quenching period separating the first and second light emitting periods and a second quenching period separating the second and third light emitting periods, the first, second and third light emitting periods being respectively set in each sub-luminance information piece,
wherein the driving section sets the third light emitting period of the first sub-luminance information piece adjacent to the first light emitting period of the second sub-luminance information piece, and the driving section sets the third light emitting period of the second sub-luminance information piece adjacent to the first light emitting period of the first sub-luminance information piece, and
wherein one or more of a timing of start and end of each light emitting period and the number of the light emitting periods are changeable.

9. The display device according to claim 8 ,
wherein the display section is a liquid crystal display section,
wherein the light emitting section is a backlight, and
wherein the driving section has a plurality of operation modes, and changes one or both of the timing of start of each light emitting period and the number of the light emitting periods, in accordance with the operation modes.

10. An electronic apparatus comprising:
a display device according to claim 1 ; and
a control section that performs operation control on the display device.

11. The display device according to claim 1 ,
wherein the first sub-frame image corresponds to a first sub-luminance information piece and the second sub-frame image corresponds to a second sub-luminance information, and
wherein the sub-frame generation section sets the value of the first sub-luminance information piece to the value of the luminance information when the value of the luminance information is equal to or less than the threshold value.

12. The display device according to claim 11 , wherein when the value of the luminance information is greater than the threshold value, the sub-frame generation section sets the value of the first sub-luminance information piece to the threshold value and the second sub-luminance information piece to the difference between the value of the luminance information and the threshold value.

13. A method of driving a display device that includes a display section including a

Assignees

• Joled Inc

Inventors

• Maeyama Koichi
• Isobe Teppei

Classifications

• G09G2320/064

  by time modulation of the brightness of the illumination source · CPC title

• G09G2320/103

  Detection of image changes, e.g. determination of an index representative of the image change · CPC title

• G09G3/3406 Primary

  Control of illumination source (illumination devices structurally associated with liquid crystal cells G02F1/1336) · CPC title

• G09G2320/045

  Compensation of drifts in the characteristics of light emitting or modulating elements · CPC title

• G09G2320/0646

  Modulation of illumination source brightness and image signal correlated to each other · CPC title