Projecting device with adjustable color temperature
AssigneeCoretronic Corporation
InventorSze-Ke Wang
Life of this patent
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Abstract
An adjustable color-temperature projecting device includes a light source for providing light beams, and a filtering means. The filtering means includes red, green and blue filtering sections. The blue filtering section has coatings with different transmissivitys. The intensity of blue primary color light is varied due to the different transmissivitys of the blue filtering section, so that the ratio of blue primary color light in the hybrid light is modified to cause change in color temperature with reduced loss of brightness. Then, the filtering means is moved so that the light beam is projected onto a predetermined location to obtain the desired color temperature.
Claims8
An adjustable color-temperature projecting device, comprising:
- a light source, generating a light beam;
- and
- a filtering means, having at least one red filtering section, a green filtering section and a blue filtering section, wherein the blue filtering section has coatings of different transmissivities, and the color temperature of a hybrid light is changed by moving the filtering means to modify the location where the light beam passes through the blue filtering section.
Dependencies are inferred from the claim text.