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US 11,448,949 B2Granted
Projection system and projection display method
AssigneeAppotronics Corporation Limited
InventorsXin Yu, Fei Hu, Chao Wu, Yi Li
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AssigneeAppotronics Corporation Limited
InventorsXin Yu, Fei Hu, Chao Wu, Yi Li
Estimating the term…
A projection system, comprising a first light source which is an array light source, the first light source being divided into a plurality of illumination areas, and each illumination area may be independently controllable so as to generate a first illumination light field of which the brightness and darkness may be modulated; a second light source comprises an illumination unit and a light steering unit; the light steering unit redistributes illumination light emitted from the illumination unit to generate a second illumination light field of which the brightness and darkness may be modulated, wherein the first and second illumination light fields overlap to generate a combined light field. Also provided is a projection display method. The goal of simultaneously increasing image peak value brightness and lowering image dark field brightness is achieved, and a projection system that has a high contrast ratio is thus obtained.
A projection system, comprising:
The projection system according to claim wherein the software modules executed by the processing unit further comprise:
The projection system according to claim wherein a brightness of the light-emitting unit of the second light source is adjustable, and the second light source brightness controlling module is further configured to generate a brightness control signal corresponding to the light-emitting unit according to the brightness distribution signal of the light steering element, so as to adjust the brightness of the light-emitting unit according to a brightness required for the light steering element.
The projection system according to claim wherein the first light source brightness controlling module is configured to determine a light dimming region and a light increasing region of the light steering element according to the pixel gray scale signal of the image frame and the maximum brightness of the first light source, and generate the brightness distribution signal of the illumination regions of the first light source according to the pixel gray scale signal of the image frame, the maximum brightness of the first light source, and a retention brightness of the light dimming region of the light steering element.
The projection system according to claim wherein the second light source brightness control module is configured to determine a light dimming region and a light increase region of the light steering element and calculate brightness increment required for the light increasing region according to the pixel gray scale signal of the image frame and the brightness distribution signal corresponding to the illumination regions of the first light source, and calculate a brightness distribution of the light dimming region according to light energy output by the light-emitting unit and the brightness increment required for the light increasing region, so as to obtain the brightness distribution signal of the light steering element.
A projection display method, comprising:
Dependencies are inferred from the claim text.