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    • 6. 发明申请
    • Converting a Three Primary Color Input Signal Into Four Signals
    • US20080186327A1
    • 2008-08-07
    • US11911570
    • 2006-04-13
    • Oleg BelikGerben Johan HekstraNalliah Raman
    • Oleg BelikGerben Johan HekstraNalliah Raman
    • G09G5/02
    • H04N1/6022G09G5/02G09G2300/0452G09G2320/0271
    • A method of converting a three primary color input signal comprises a first, a second, and a third input signal (C1, C2, C3) into a four primary color drive signal comprising a first, second, third, and fourth drive signal (P1, P2, P3, P4) for driving four primary colors of a multi-primary color additive display (3). Three functions (F1, F2, F3) representing the first, second, and third drive signal (P1, P2, P3) as a function of the fourth drive signal (P4) are defined. The intersection values (P4i) of the fourth drive signal (P4) are determined at a set of intersections of: the three functions (F1, F2, F3) mutually, and of the three functions (F1, F2, F3) and a line (F4) defined by the fourth drive signal (P4) being equal to itself, wherein only the intersection values (P4i) of functions having opposite signs of their first derivative are relevant. The associated first, second and third drive signals (P1, P2, P3) are calculated at (i) the intersection values (P4i) of the fourth drive signal (P4) to obtain calculated values (CV1, CV2, CV3), and (ii) at boundary values (P4min, P4max) of a valid range (VR) of the fourth drive signal (P4) wherein all drive signals (P1, P2, P3, P4) have valid values. The values of interest (CV1, CV2, CV3, P4i) comprising the intersection values (P4i) of the fourth drive signal (P4) and the associated calculated values (CV1, CV2, CV3) are determined. The maximum value (Vmax) or minimum value (Vmin) of the values of interest (CV1, CV2, CV3, P4i) at the intersection values (P4i) are calculated. And finally, the intersection value (P4i) at which the maximum value (Vmax) or minimum value (Vmin) is minimum or maximum, respectively, is selected.
    • 9. 发明申请
    • COLOUR CONVERSION FOR A MULTY-PRIMARY DISPLAY
    • US20100060659A1
    • 2010-03-11
    • US12441544
    • 2007-09-17
    • Gerben Johan HekstraOleg Belik
    • Gerben Johan HekstraOleg Belik
    • G09G5/02
    • H04N1/54G09G5/02G09G2300/0452G09G2310/0235G09G2320/0242G09G2320/0247G09G2340/06H04N9/67H04N19/426
    • A multi-primary conversion method for converting (CON) an input vector (CIP) defining a color of an input pixel in a linear color space (X, Y, Z) into a drive vector (PD) having n components for driving n display primaries (P1, . . . , Pn) of a display color space. The drive vector (PD) comprises m sub-drive vectors (PDi) for driving m groups of the display primaries (P1, . . . , Pn). The conversion method comprises: determining (5, 6; 9, 10) in the linear color space (X, Y, Z) a position of the input vector (CIP) with respect to boundaries (CB) of at least two of three gamuts (FG, ELG, ELCG) being defined by transformed display primaries (CP1, . . . , CPn), wherein the three gamuts (FG, ELG, ELCG) indicate: a full gamut (FG) comprising all colors being reproducible with the m groups of the sub-drive vectors (PDi), an equal luminance sub-gamut (ELG) comprising all colors having equal luminance and being reproducible with each one of the m groups of the sub-drive vectors (PDi), and an equal luminance and equal chrominance sub-gamut (ELCG) comprising all colors being reproducible with each one of the m groups of sub-drive vectors (PDi) each having equal luminance and equal chrominance. Selecting (3; 12, 13) two boundary vectors (CB 1, CB2) on the boundaries (CB) of the three gamuts (FG, ELG, ELCG) to enable the input vector (CIP) to be interpolated from the two boundary vectors (CB1, CB2). Determining (3; 14) an interpolation factor (u) from the position of the input vector (CIP) with respect to the selected two boundary vectors (CB1, CB2). And, interpolating (4; 11) in the display color space the drive vector (PD) representing the color of the input vector (CIP) from the interpolation factor (u) and two boundary vectors (PB1, PB 2) in the display color space corresponding to the selected two boundary vectors (CB1, CB2) in the linear color space.
    • 10. 发明申请
    • DYNAMIC GAMUT CONTROL
    • 动态游戏控制
    • US20100020109A1
    • 2010-01-28
    • US12441545
    • 2007-09-14
    • Oleg BelikDmitry Nikolaevich Znamenskiy
    • Oleg BelikDmitry Nikolaevich Znamenskiy
    • G09G5/10
    • G09G3/2003G09G3/3413G09G2300/0452G09G2320/0633G09G2320/064G09G2320/0646G09G2320/0666G09G2340/06
    • A method of dynamic gamut control comprises the step of controlling (LD) intensities of at least a subset (PR, PG, PB) of a set of color primaries (PR, PG, PB, PW) associated with corresponding sub-pixels (RP, GP, BP, WP) of a display device. The method further comprises the step of searching (PC) for a minimal intensity value (Ra; Ga; Ba) of one of the color primaries of the subset (PR; PG; PB) being adjusted, to obtain together with the other color primaries (WP) of the set of color primaries (PR, PG, PB, PW) an adjusted color gamut (GG1; GR1; GB1; GG2; GR2) still containing all the colors of the set of colors (S) by: for each color of the set of colors (S), determining (PC) the minimal intensity value (Ra; Ga; Ba) of the color primary being adjusted to obtain the adjusted color gamut (GG1; GR1; GB1; GG2; GR2) wherein the selected color of the set of colors (S) lies substantially on a boundary of the adjusted color gamut (GG1; GR1; GB1; GG2; GR2), and selecting (PC) a maximum value of the determined minimal intensity values (Ra; Ga; Ba) of the color primary being adjusted.
    • 一种动态色域控制的方法包括以下步骤:控制与对应的子像素(RP)相关联的一组色母(PR,PG,PB,PW)的至少一个子集(PR,PG,PB)的强度 ,GP,BP,WP)。 所述方法还包括搜索(PC)所调整的子集(PR; PG; PB)中的一个原色的最小强度值(Ra; Ga; Ba)的步骤,以与其它颜色基色 (PR,PG,PB,PW)的集合(WP),仍然包含该组颜色(S)的所有颜色的调整色域(GG1; GR1; GB1; GG2; GR2): 一组颜色(S)的颜色,确定(PC)调整的原色的最小强度值(Ra; Ga; Ba)以获得调整色域(GG1; GR1; GB1; GG2; GR2),其中 所选择的一组颜色(S)的颜色基本上位于调整色域(GG1; GR1; GB1; GG2; GR2)的边界上,并且选择(PC)所确定的最小强度值(Ra; Ga ; Ba)的颜色初级被调整。