Patent ID: 8743092
Filing Date: 2014-06-03
Classification: G06F

Abstract:
1. A display apparatus comprising: a display panel which comprises a plurality of areas; a communication unit which receives information about brightness sensed by a pointing device; a backlight unit which comprises a plurality of light sources; and a controller which controls the backlight unit to change brightness of the plurality of areas by first predetermined units, in sequential order from a first one of the first predetermined units continuously to an nth one of the first predetermined units, wherein a total of n first predetermined units are provided on the display panel, controls the backlight unit to change the brightness of the plurality of areas by second predetermined units, in sequential order from a first one of the second predetermined units continuously to an mth one of the second predetermined units, wherein a total of m second predetermined units are provided on the display panel, and determines a pointing position of the pointing device based on relative variation in the information about the brightness of the plurality of areas, wherein the controller generates a circle for each of at least three neighboring areas adjacent to an anticipated pointing position based on the relative variation in the information about the brightness with regard to the brightness of the determined area, and detects the pointing position where the circles intersect with one another.