Patent ID: 8648844
Filing Date: 2014-02-11
Classification: G09G

Abstract:
1. A transmissive display, comprising: a backlight; a valve for modulating light from the backlight to create an image; a connector for connection with a viewer behaviour detection apparatus for obtaining a behaviour measuring signal (I_usr); and a power optimizer, having (a)(i) an input connection (C_i) coupled via the connector to the viewer behaviour detection apparatus for receiving from it the behaviour measuring signal (I_usr), and having (a)(ii) an output (O_BL) for sending an optimal drive value (D_Lb) to the backlight depending on the behaviour measuring signal (I_usr) such that b(i) power to the backlight remains ON and (b)(ii) a reasonable quality viewable image is still shown on the display via the valve, wherein the power optimizer further calculates the optimal drive value (D_Lb) based on a function f(P,V) that is (c)(i) dependent on a power (P) used by the display when the backlight is driven by the optimal drive value (D_Lb), and (c)(ii) dependent on an estimated visibility measure (V) that models an estimate of how visible the created image, to be optimized on the display via the valve versus power usage, is to the viewer while still retaining visibility, wherein the power optimizer further calculates a transformation (T) of input drive values (I_in), of an input image (im), into intelligently optimized output drive values I_out for driving pixels of the valve, via an output connection O_v between the power optimizer and the valve, wherein the transformation includes a histogram analysis on the input image to find lobes of a histogram and determination of demarcation boundaries for adjacent lobes, the transformation further including turning variable parameters in the estimated visibility measure by shifting the lobes, leading to variable interlobe distances, or by modifying a lobe shape.