Method of Constructing Images for an Imaging Appliance
In an imaging appliance with display of the colour sequential type, a spatially monochrome image is displayed by preparing, for each complete image to be displayed, a sequence of monochrome images comprising an image for each colour of the light box, the monochrome images of the sequence being such that a pixel that is lit in one colour is off in the other colour(s), so that there is no colour break effect. Certain areas of the display can be reserved, in which the pixels are controlled in the usual way so as to use the entire colour palette of the display, for example to display a colour video image. The invention applies notably to the head-up imaging appliances applicable in onboard navigation systems, and to the imaging appliances for direct viewing.
1 . A method of constructing images in order to display a complete image on an imaging system comprising a liquid crystal display of the colour sequential type and a light box capable of lighting said display sequentially in at least two colours, wherein the method comprises, for each display sequence of a complete image, in generating a sequence of images comprising an image for each colour of said light box, such that, at least for one set of pixels of the display, all the pixels of this set that are on in the image associated with one colour are off in each of the other images associated with the other colours of the sequence.
2 . The method according to claim 1 , in which a first colour is used to display a monochrome background image comprising a symbolic image, representing information supplied by navigation instruments.
3 . The method according to claim 2 , in which said background image also comprises a monochrome video image.
4 . The method according to claim 2 , applied to a head-up imaging device, using at least one other colour to display in this colour information supplied by an onboard computer.
5 . The method according to claim 1 , wherein said set of pixels encompasses all the pixels of the display, to display an image that is spatially monochrome over the entire display.
6 . The method according to claim 1 , wherein said set of pixels comprises a portion of the pixels of the display, to display an image that is spatially monochrome in a corresponding area of the display, the other pixels of the display being able to be controlled to display information in the entire colour palette of the display.
7 . The method according to claim 6 , in which said other pixels are used to display a colour video image in an area of the display.
8 . An imaging appliance comprising an imaging system comprising a liquid crystal display of the colour sequential type and a light box with at least two colours, in which said imaging system receives sequences of images to be displayed, generated according to an image construction method according to claim 1 , in order to display spatially monochrome images.
9 . An imaging appliance according to claim 8 , for head-up imaging.
10 . An imaging appliance according to claim 8 , for direct viewing.