Display device with pulsed light source
AssigneeDigital Projection Limited
InventorDermot J. Quinn
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Abstract
A display system comprising a light source and a plurality of switchable elements, wherein each element is switchable at an element switching frequency in accordance with an element control signal between an “on” state in which light is directed from the light source onto a display, and an “off” state in which light is not directed onto a display. The light source being configured to generate a pulsed light source output at a light source pulse frequency.
Claims26
A display system comprising a light source and a plurality of switchable elements wherein each element is switchable at an element switching frequency in accordance with an element control signal between an “on” state in which light is directed from the light source onto a display, and an “off” state in which light is not directed onto a display, wherein the light source is configured to generate a pulsed light source output at a light source pulse frequency that is greater than the element switching frequency, and the number of light source output pulses reflected by an element while it is in the “on” state for a predetermined time is not the same for each occasion that the element is in the “on” state for that predetermined time so that the rate at which the amount of light reflected by the element increases with the length of time the element is in the “on” state increases with the length of time that the element is in the “on” state for short on times.
A method of operating a display system comprising a light source and a plurality of switchable elements, the method comprising:
- the light source generating a pulsed light source output at a light source pulse frequency;
- and
- switching an element of the plurality of switchable elements at an element switching frequency in accordance with an element control signal between an “on” state in which light is directed from the light source onto a display, and an “off” state in which light is not directed onto a display wherein the light source pulse frequency is greater than the element switching frequency, and the number of light source output pulses reflected by an element while it is in the “on” state for a predetermined time is not the same for each occasion that the element is in the “on” state for that predetermined time so that the rate at which the amount of light reflected by the element increases with the length of time the element is in the “on” state increases with the length of time that the element is in the “on” state for short on times.
Dependencies are inferred from the claim text.