Image Quality-Aware Backlight Dimming With Color and Detail Enhancement Techniques

A constrained error diffusion method to shape quantization noise in backlight dimming

“…Even so, LED backlight composes the largest percent of the total power consumption of a display device. Thus, backlight dimming technologies [1][2][3][4][5][6][7][8][9][10][11][12][13][14] have been extensively investigated to dynamically reduce the power consumption and preserve the contrast of the displayed images simultaneously.…”

“…Backlight dimming could be classified to global backlight dimming [13,14] and local backlight dimming [1][2][3][4][5][6][7][8][9][10][11][12]. Global backlight dimming controls the luminance of the whole screen, while local backlight dimming controls the luminance of certain screen areas separately.…”

Subjective comparison of brightness preservation methods for local backlight dimming displays

“…Some of those algorithms have been evaluated via subjective comparisons, in addition to objective measures of distortion [4], but we are not aware of any prior subjective quality assessment studies comparing techniques for brightness preservation (in some sources, the term "pixel compensation" is used instead) in local backlight dimming displays. Different methods for brightness preservation have been presented in the related work [5][6][7], but the most sophisticated methods are designed for global backlight dimming, and they are not appropriate in the context of local backlight dimming. Our study is more closely related to studies concerning subjective evaluation of tone mapping algorithms [8][9][10].…”

Adaptive one-dimensional dimming technique for liquid crystal displays with low power consumption and high image quality

“…[1][2][3][4][5][6] To reduce power consumption while increasing image quality in LCDs, various technologies have been studied such as backlight dimming, [7][8][9][10][11][12][13][14][15] inversion methods, [16][17][18] and charge sharing methods. [19][20][21][22][23][24] Based on a demand for slim designs and low power consumption, a side-lit light-emitting diode (LED) backlight unit (BLU) has been widely adopted not only in mobile LCD applications but also in large LCDs.…”

“…Thus, the luminance of the image block area is considered to be uniform. [25][26][27][28][29] However, the luminance gradually varies across the image block depending on the distance from each LED unit. Thus, the luminance of an image block may not be uniform throughout the block when some LED units are on and others are off.…”