Using the HT46F47E in digital photoframe backlight applications

Digital photo frames displays are TFT LCD types. Because the crystals inherently cannot emit illumination, a background illumination source is required, for which most types use an LED flat panel. The HT46F47E demo board can demonstrate two modes of LCD panel LED background lighting: One mode is for automatic adjustment of illumination levels according to background light levels. Higher background illumination level results in higher LED background lighting level and vice versa. The other mode is for manual adjustment of the illumination level for which 8 levels are provided.

View the PDF document for more information.