Projector color calibration device and method
OwnerRone Fue Janeinventor
Life of this patent
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Abstract
A projector color calibration device and a method thereof are provided. The device is installed in a projector, and comprises a photo detection component used to receive a color brightness value, an image signal processing unit used to process an image signal inputted to the projector and to store the processed image into a memory, and a central processor used to compare the color brightness value detected by the photo detection component with the image signal inputted to the projector and to perform color calibration for obtaining an accurate color output value. It is not necessary for a user to manually adjust the output color of the projector. Moreover, the optimum automatic adjustment can be accomplished to meet the requirements in different environments.
Claims8
A projection color calibration device installed in a projector, said projector color calibration device comprising:
- a photo detection component used to detect a color brightness value and convert said color brightness value into a proportional voltage value, said voltage value being converted into a digital signal by an analog-to-digital converter;
- an image signal processing unit used to process an image signal inputted to said projector, said image signal being converted into a digital signal by another analog-to-digital converter, the processed image signal being stored into a memory;
- and
- a central processor used to compare said color brightness value detected by said photo detection component with said image signal in said memory, to perform color calibration to adjust said image signal, and to store a comparison value of the color brightness value detected by said photo detection component with said calibrated image signal into a comparison table.
A projector color calibration method for processing a color brightness value detected by a photo detection component and an output light of a projector, said projector color calibration method comprising the steps of:
- (a) adjusting the output light of said projector to let read values of the red, green, and blue colors in said photo detection component are the smallest and the same, storing said read values into a comparison table, simultaneously storing output light values of said projector corresponding to said read values into said comparison table;
- (b) adjusting the output light of said projector to let read values of the red, green, and blue colors in said photo detection component are the largest and the same, storing said read values into a comparison table, simultaneously storing output light values of said projector corresponding to said read values into said comparison table;
- (c) setting several sets of values between the largest and smallest read values in said photo detection component and storing them into said comparison table, adjusting the output light of said projector so that said projector can satisfy said set values at different output light values, simultaneously storing different output light values of said projector corresponding to said set values into said comparison table;
- and
- (d) calculating and then filling those parts in said comparison table having no comparison values by interpolation.
A projector color calibration method for processing a color brightness value detected by a photo detection component and an output light of a projector, said projector color calibration method comprising the steps of:
- (a) adjusting the output light of said projector to let read values of the red, green, and blue colors in said photo detection component are the largest and the same, storing said read values into a comparison table, simultaneously storing output light values of said projector corresponding to said read values into said comparison table;
- (b) adjusting the output light of said projector to let read values of the red, green, and blue colors in said photo detection component are the smallest and the same, storing said read values into a comparison table, simultaneously storing output light values of said projector corresponding to said read values into said comparison table;
- (c) setting several sets of values between the largest and smallest read values in said photo detection component and storing them into said comparison table, adjusting the output light of said projector so that said projector can satisfy said set values at different output light values, simultaneously storing different output light values of said projector corresponding to said set values into said comparison table;
- and
- (d) calculating and then filling those parts in said comparison table having no comparison values by interpolation.
Dependencies are inferred from the claim text.