Patent ID: 8297756
Filing Date: 2012-10-30
Classification: F21L,F21S,F21V,F21W,F21Y,G03B

Abstract:
1. An illumination device, comprising: an illumination body, having an illumination opening with a container formed therein; a light emitting element, having a light source pattern mainly for illumination and disposed in the container, for generating a beam projecting onto a surface of an object and forming a projection facula on the surface; a transparent sheet, having a predetermined pattern mainly for displaying and disposed in the container, and separated with the light emitting element in a predetermined distance; a hollow sleeve, movably covering the illumination body; and a first convex lens, disposed in the hollow sleeve and having a focus length; wherein the light emitting element, the transparent sheet, and the first convex lens are sequentially arranged along a moving direction; when the hollow sleeve is moved along the moving direction, the first convex lens is simultaneously moved to make the projection facula from present the light source pattern with a first illumination value to present the predetermined pattern with a second illumination value less than the first illumination value, and the first convex lens is movable within an allowable moving range that keeps the transparent sheet distanced from the first convex lens for zero to twice of the focus length of the first convex lens; wherein a first zone, a first imaging position and a second imaging position are sequentially located along the moving direction; when the first convex lens is moved within the first zone, the projection facula illuminating a first illumination field; when the first convex lens is moved to the first imaging position, the projection facula illuminates a second illumination field; when the first convex lens is moved to the second imaging position, the projection facula illuminates a third illumination field; the first illumination field is greater than the second illumination field; and the first illumination field is also greater than the third illumination field.