Patent ID: 8497887
Filing Date: 2013-07-30
Classification: G09G

Abstract:
1. A display driving unit used in a liquid crystal display having a display panel, comprising: a scan driving circuit connected to the display panel; a data driving circuit connected to the display panel; and a gray insertion processing unit including a processor, a register, a first storage unit, and a second storage unit; the first storage unit storing a first γ curve, the second storage unit storing a second γ curve, and both the first storage unit and the second storage unit storing a standard γ curve; the first γ curve and the second γ curve intersecting and respectively including at least one high luminance segment corresponding to luminance higher than luminance corresponding to the portion of the standard γ curve in the gray level range of the high luminance segment and at least one low luminance segment corresponding to luminance lower than luminance corresponding to the portion of the standard γ curve in the gray level range of the low luminance segment; the high luminance segments of one of the first γ curve and the second γ curve and the low luminance segments of another of the first γ curve and the second γ curve respectively corresponding to same gray level ranges; wherein the register stores data of each image displayed by the liquid crystal display, the processor detects the gray level of the image, determines the luminance of the image in a first sub-period for displaying the image according to the gray level of the image and the first γ curve, and determines the luminance of the image in a second sub-period for displaying the image according to the gray level of the image and the second γ curve; the data driving circuit cooperates with the scan driving circuit to sequentially display the image in the luminance determined according to the gray level of the image and the first γ curve in the first sub-period and display the image in the luminance determined according to the gray level of the image and the second γ curve in the second sub-period.