报告题目：Optimal Local Dimming for LC Image Formation with Controllable Backlighting
Comparing with many other video display technologies, the contrast ratio of conventional liquid crystal display (LCD) is poor due to the unavoidable backlight leakage of liquid crystal (LC) cells. One way to solve this problem is to dynamically control the luminance of a backlight panel consisting of light emitting diodes (LEDs). LED-backlit LC displays hold the promise of improving the image quality while reducing the energy consumption with signal-dependent local dimming. To fully realize such potentials we propose a novel local dimming technique that jointly optimizes the intensities of LED backlights and the attenuations of LC cells (pixels). The objective is to minimize the distortion in luminance reproduction due to the leakage of LCD and the coarse spatial granularity of the LED backlights. The optimization task can be formulated as a linear programming or quadratic programming problem, and both exact and faster approximate algorithms are proposed. Simulation results demonstrate superior performances of the proposed algorithms over the existing local dimming algorithms.