Display device and television device

1. A display device comprising:

a display panel for displaying images, the display panel including red pixels configured to selectively pass red light therethrough, blue pixels configured to selectively pass blue light therethrough, and green pixels configured to pass at least green light therethrough, and the red pixels, the green pixels, and the blue pixels being arranged in rows and columns, the display panel defined into at least two areas including a first area relatively close to a scanning start position and a second area relatively far from the scanning start position;

a lighting device for supplying light to the display panel for displaying images, the lighting device including magenta light sources configured to emit magenta light and green light sources configured to emit green light, the magenta light sources including at least two kinds of magenta light sources including first magenta light sources supplying light to the first area and second magenta light sources supplying light to the second area, and the green light sources including at least two kinds of green light sources including first green light sources supplying light to the first area and second green light sources supplying light to the second area;

a panel controller for controlling the display panel such that one frame display period includes a red and blue display period and a green display period, wherein

in the red and blue display period, the red pixels and the blue pixels are selectively driven for displaying an image in red and blue,

in the green display period, the green pixels are selectively driven for displaying an image in green, and

the panel controller being further for scanning sequentially in a column direction a red pixel group including the red pixels arranged in a row direction, a green pixel group including the green pixels arranged in the row direction, and a blue pixel group including the blue pixels arranged in the row direction; and the display device further comprising:

a lighting controller for controlling the lighting device to:

turn on the first magenta light sources and the first green light sources until scanning of the red pixels and the blue pixels or the green pixels included in the first area is finished after starting of the scanning;

after the scanning, turn on the first magenta light sources or the first green light sources and turn off the first green light sources or the first magenta light sources for at least a certain period until scanning of the green pixels or the red pixels and the blue pixels included in the first area for a next green display period or a next red and blue display period is started;

turn on the second magenta light sources and the second green light sources until scanning of the red pixels and the blue pixels or the green pixels included in the second area for the red and blue display period or the green display period is finished after the scanning is started; and

after the scanning, turn on the second magenta light sources or the second green light sources and turn off the second green light sources or the second magenta light sources for at least a certain period until scanning of the green pixels or the red pixels and the blue pixels included in the second area for a next green display period or a next red and blue display period is started.

2. The display device according to claim 1 , wherein

the red and blue display period is defined into a red and blue first half display period and a red and blue second half display period, in the red and blue first half display period, the red pixels and the blue pixels included in the first area are selectively driven, and in the red and blue second half display period, the red pixels and the blue pixels included in the second area are selectively driven,

the green display period is defined into a green first half display period and a green second half display period, in the green first half display period, the green pixels included in the first area are selectively driven, and in the green second half display period, the green pixels included in the second area are selectively driven, and

the lighting controller is configured to control the lighting device, when the one frame display period is shifted from a first frame display period in which brightness is relatively high to the second frame display period in which the brightness is relatively low, to obtain total amounts of light such that:

a total amount of light emitted by each of the first magenta light sources in the red and blue second half display period of the second frame display period is equal to a total amount of light emitted by each of the first magenta light sources in the red and blue second half display period of the first frame display period,

a total amount of light emitted by each of the first green light sources in the green second half display period of the second frame display period is equal to a total amount of light emitted by each of the first green light sources in the green second half display period of the first frame display period,

a total amount of light emitted by each of the first magenta light sources and the first green light sources in the red and blue first half display period and the green first half display period of the second frame display period is smaller than a total amount of light emitted by each of the first magenta light sources and the first green light sources in the red and blue first half display period and the green first half display period, respectively,

a total amount of light emitted by each of the second magenta light sources in the green first half display period of the second frame display period is equal to a total amount of light emitted by each of the second magenta light sources in the green first half display period of the first frame display period,

a total amount of light emitted by each of the second green light sources in the red and blue first half display period of the second frame display period is equal to a total amount of light emitted by each of the second green light sources in the red and blue first half display period of the first frame display period, and

a total amount of light emitted by each of the second magenta light sources and the second green light sources in the red and blue second half display period and the green second half display period of the second frame display period is smaller than a total amount of light emitted by each of the second magenta light sources and the second green light sources in the red and blue second half display period and the green second half display period of the first frame display period, respectively.

3. The display device according to claim 2 , wherein the lighting controller is configured to control the lighting device, when the total amount of light emitted by each of the first magenta light sources and the total amount of light emitted by each of the first green light sources in the red and blue first half display period and in the green first half display period of the second frame display period and the total amount of light emitted by each of the second magenta light sources and the total amount of light emitted by each of the second green light sources in the red and blue second half display period and in the green second half display period of the second frame display period reach setting amounts, respectively, to obtain the total amount of light such that:

the total amount of light emitted by each of the second magenta light sources in the red and blue second half display period of the second frame display period, the total amount of light emitted by each of the first green light sources in the green second half display period of the second frame display period, the total amount of light emitted by each of the second magenta light sources in the green first half display period of the second frame display period, and the total amount of light emitted by each of the second green light sources in the red and blue first half display period of the second frame display period are smaller than the total amount of light emitted by each of the first magenta light sources in the red and blue second half display period of the first frame display period, the total amount of light emitted by each of the first green light sources in the green second half display period of the first frame display period, the total amount of light emitted by each of the second magenta light sources in the green first half display period of the first frame display period, and the total amount of light emitted by each of the second green light sources in the red and blue first half display period of the first frame display period, respectively.

4. The display device according to claim 2 , wherein the lighting controller is configured to drive with current amplitude light adjustment at least the first magenta light sources in the red and blue second half display period of the second frame display period, the first green light sources in the green second half display period of the second frame display period, the second magenta light sources in the green first half display period of the second frame display period, and the second green light sources in the red and blue first half display period of the second frame display period.

5. The display device according to claim 1 , wherein the lighting controller is configured to drive the magenta light sources and the green light sources with constant current for entire display periods of the one frame display period.

6. The display device according to claim 1 , wherein the green pixels are configured to selectively pass green light therethrough.

7. The display device according to claim 1 , wherein each of the magenta light sources includes a blue light emitting element configured to emit blue light and red phosphors configured to emit red light when excited by the blue light emitted by the blue light emitting element.

8. The display device according to claim 1 , wherein

the panel controller is configured to drive the display panel such that the one frame display period includes at least a second red and blue display period successively from the red and blue display period, in the second red and blue display period, the red pixels and the blue pixels are selectively driven and such that the one frame display period includes a second green display period successively from the green display period, in the second green display period, the green pixels are selectively driven, and

the lighting controller is configured to drive the lighting device such that the magenta light sources are turned on and the green light sources are turned off for at least a certain period in the second red and blue display period and the green light sources are turned on and the magenta light sources are turned off for at least a certain period in the second green display period.

9. The display device according to claim 1 , wherein

the panel controller drives the display panel such that the red and blue display periods and the green display periods are repeated alternately several times in the one frame display period, and

the lighting controller drives the lighting device to turn on or turn off the first magenta light sources, the first green light sources, the second magenta light sources, and the second green light sources in synchronism with the scanning of the red pixels, the blue pixels, and the green pixels included in each of the first area and the second area of the display panel for the red and blue display period and the green display period, the scanning for the red and blue display period and the scanning for the green display period are repeated alternately for several times.

10. The display device according to claim 1 , further comprising a light guide plate having a plan view rectangular shape including four edge surfaces along the row direction and the column direction, two of the four edge surfaces along the row direction are a pair of light entrance surfaces that are opposite the magenta light sources and the green light sources and through which light from the magenta light sources and light from the green light source enter, the light guide plate including one plate surface that is opposite the display panel and is a light exit surface through which light exits toward the display panel, wherein

the magenta light sources and the green light sources are arranged such that the first magenta light sources and the first green light sources are arranged opposite the light entrance surface of the light guide plate that is on a first area side with respect to the column direction and the second magenta light sources and the second green light sources are arranged opposite the light entrance surface of the light guide plate that is on a second area side with respect to the column direction.

11. The display device according to claim 10 , wherein

the lighting device includes a first light source board and a second light source board, the first light source board is opposite the light entrance surface that is on the first area side with respect to the column direction and includes the first magenta light sources and the first green light sources that are alternately arranged in the row direction, and the second light source board is opposite the light entrance surface that is on the second area side with respect to the column direction and includes the second magenta light sources and the second green light sources that are alternately arranged in the row direction.

12. The display device according to claim 1 , wherein

the lighting device includes the magenta light sources and the green light sources that are arranged in rows and columns along a plate surface of the display panel such that light emitting surfaces thereof face the plate surface of the display panel, and

the magenta light sources and the green light sources are arranged such that the first magenta light sources and the first green light sources overlap the first area in a plan view and the second magenta light sources and the second greenlight sources overlap the second area in a plan view.

13. The display device according to claim 12 , wherein

the lighting device further includes a light source board that is opposite the plate surface of the display panel and the magenta light sources and the green light sources are arranged alternately on the light source bard in the row direction and the column direction.

14. The display device according to claim 1 , wherein the display panel is a liquid crystal panel including a pair of substrates and liquid crystals sealed between the substrates.

15. A television device comprising the display device according to claim 1 .