Lighting device, display device, and television receiver

摘要

Uneven brightness is less likely to occur in lighting devices at low cost. A backlight unit 12 includes LEDs 17, a chassis 14 having a bottom plate 14a and housing the LEDs 17, and an LED drive controller 24 controlling drive of the LEDs 17. The LEDs 17 are arranged in a matrix in row and column directions (X-axis direction and Y-axis direction) along the bottom plate 14a, forming respective LED groups 25 each along the row direction. The LED groups 25 include a middle LED group 28 and an end side LED group 29. The middle LED group 28 is located in a middle portion of the bottom plate 14a in the column direction group and the end side LED group 29 is located closer to an end of the bottom part from the middle portion group. The LED drive controller 24 controls light of at least one of the middle LED group 28 and the end side LED group 29 such that the end side LED group 29 has relatively high brightness and the middle LED group 28 has relatively low brightness.

主权项

1. A display device comprising:
a lighting device including:
a plurality of light sources;a chassis including a bottom part having a rectangular plan view shape and configured to house the light sources; anda light source drive controller configured to control drive of the light sources; and a display panel configured to display images using light from the lighting device,wherein:
the light sources are arranged in a matrix in row and column directions along the bottom part; the light sources that are arranged in the row direction configure a light source group and the light source group includes a plurality of light source groups arranged in the column direction; the light source groups include a middle light source group and an end side light source group and the middle light source group includes the light source groups arranged in a middle portion of the bottom part in the column direction and the end side light source group includes the light source groups arranged close to an end side of the bottom part in the column direction; the light source drive controller is configured to control light of at least one of the middle light source group and the end side light source group in accordance with an image display mode; the light source drive controller is configured to switch the image display mode between a first image display mode having brightness uniformity and a second image display mode having higher brightness than that of the first image display mode; in the first image display mode, the light source drive controller is configured to control light of at least one of the middle light source group and the end side light source group such that the end side light source group has relatively high brightness and the middle light source group has relatively low brightness; in the first image display mode, the light source drive controller is configured to control the middle light source group such that an ON time is shorter and an OFF time is longer than the ON time and the OFF time of the middle light source group in the second image display mode; and in the second image display mode, the light source drive controller is configured to control light of at least one of the middle light source group and the end side light source group such that the end side light source group and the middle light source group have equal brightness and a ratio between the ON time and the OFF time of the middle light source group and a ratio between an ON time and an OFF time of the end side light source group are equal.