System for automatic color calibration
OwnerRichard A. Holub, Daniel R. Mongeauinventors
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Abstract
A system for automatic color calibration for a color display is provided having an assembly of a member adjacent the outer periphery of the screen of the display and a color measuring instrument coupled to the member. The system is particularly usefull at a site or node of a network of sites or nodes for distributing and controlling color reproduction. The color measuring instrument includes a sensor spaced from the screen at an angle with respect to the screen for receiving light from an area of the screen. Methods are also provided for maintaining calibration of a color display using a color measuring instrument. Apparatuses are further provided for checking the calibration of a color measurement instrument having a spectrograph for measuring color.
Claims32
An assembly for non-contact measurement of color from a color display having a screen comprising:
- a first member adjacent the outer periphery of said display;
- and
- a color measuring instrument coupled to said first member non-contact with said screen, wherein said color measuring instrument has at least one lens and is positioned for receiving light from an area of the screen through said lens.
An assembly for measuring color from a color display having a screen comprising:
- a first member surrounding the outer periphery of said display;
- a color measuring instrument coupled to said first member spaced from said screen at an angle with respect to the screen for receiving light from an area of the screen;
- and
- a viewing box having a top side which is contiguous with said first member, a back side, and open side opposing said back side, in which niedia is locatable in the interior of the viewing box.
A system for providing automatic color calibration of a color display having a screen comprising:
- a first member adjacent the outer periphery of said display;
- and
- a color measuring instrument coupled to said first member and non-contact with said screen and positioned for receiving light from said screen, wherein said color measurement instrument comprises a housing, at least one sensor in said housing for converting light received by said sensor from said screen into first electrical signals representative of said light, optics in said housing for focusing light onto said sensor;
- and
- control circuitry for receiving said first electrical signals from said sensor and converting said first electrical signals into second electrical signals representative of the color of the light received by said sensor.
A method for maintaining calibration of a color display having a screen comprising the steps of:
- adjusting the amount of light from the screen when said screen is dark to account for ambient light;
- neutral balancing the color of the display;
- measuring the gamnma in each color channel of the display wit the aid of a sensor directed in a non-contact relationship to said screen;
- and
- adjusting the color produced by the display in accordance with the gammas measured in each color channel.
An assembly for measuring color from a color display having a screen comprising:
- a first member adjacent the outer periphery of said display;
- a color measuring instrument coupled to said first member for receiving light from the screen;
- and
- a viewing box contiguous with said first member in which media is locatable in the interior of the viewing box.
Dependencies are inferred from the claim text.