Color reproduction method and system, and video display method and device using the same

Abstract

A color reproduction correcting system and method, and a video display device and method can reproduce original color by considering signal source and display device. Each signal source information and each display device information can be stored. The signal source and the display device, which are currently used (e.g., corrected), can be determined, for example, by a user selection. In one embodiment, the signal provided from a transmission side can be inverse gamma-corrected based on a corresponding signal source, and a colorimetric error of the inverse gamma-corrected signal is preferably corrected using corresponding signal source information and display device information. The corrected colorimetric error signal can be gamma-corrected based on a corresponding display device and then can be displayed on the corresponding display device.

What is claimed is:  
     
         1 . A color reproduction correcting system comprising a gamma correction circuit configured to perform gamma correction on a video signal according to a signal source and a display device.  
     
     
         2 . The color reproduction correcting system according to  claim 1 , wherein the gamma correction circuit comprises: 
 a first correction circuit that performs an inverse gamma correction to an input video signal according to the signal source; and    a second correction circuit that performs a gamma correction to the corrected inverse gamma signal according to the display device.    
     
     
         3 . The color reproduction correcting system according to  claim 2 , further comprising a storage device coupled to the gamma correction circuit that stores an inverse gamma information on the signal source and a gamma information on the display device.  
     
     
         4 . The color reproduction correcting system according to  claim 2 , wherein the corrected inverse gamma signal has a linearity.  
     
     
         5 . The color reproduction correcting system according to  claim 1 , wherein the signal source is determined by one of a user selection and a prescribed selection.  
     
     
         6 . The color reproduction correcting system according to  claim 1 , wherein the display device is determined by connection of the display device to the gamma correction circuit.  
     
     
         7 . The color reproduction correcting system according to  claim 1 , wherein the signal source includes one of a TV broadcasting signal, a component signal and a PC signal.  
     
     
         8 . The color reproduction correcting system according to  claim 1 , wherein the display device includes a CRT, a CDT, a CPT, an LCD, a PDP, a FED and a projector.  
     
     
         9 . A color reproduction correcting system comprising: 
 means for performing an first gamma correction to an input video signal according to a signal source;    means for correcting a colorimetric error with respect to the corrected gamma signal; and    means for performing a second gamma correction to the corrected calorimetric error signal according to a display device.    
     
     
         10 . The color reproduction correcting system according to  claim 9 , further comprising means for storing an inverse gamma information on the signal source, a gamma information on the display device, and a calorimetric error information between the signal source and the display device.  
     
     
         11 . The color reproduction correcting system according to  claim 9 , wherein the signal source is determined by at least one of user operation and prescribed identification information.  
     
     
         12 . The color reproduction correcting system according to  claim 9 , wherein the first gamma correction is an inverse gamma correction, and wherein the corrected inverse gamma signal has a linearity.  
     
     
         13 . The color reproduction correcting system according to  claim 9 , wherein the display device is determined by at least one of user operation and prescribed identification information.  
     
     
         14 . The color reproduction correcting system according to  claim 9 , wherein the colorimetric error is a difference between a coordinate value of a reference white with respect to the signal source and a coordinate value of a reference white with respect to the display device.  
     
     
         15 . The color reproduction correcting system according to  claim 9 , wherein the calorimetric error is a difference between a coordinate value of a phosphor with respect to the signal source and a coordinate value of a phosphor with respect to the display device.  
     
     
         16 . The color reproduction correcting system according to  claim 9 , wherein the colorimetric error is corrected by a matrix conversion between the signal source and the display device.  
     
     
         17 . The color reproduction correcting system according to  claim 9 , wherein the signal source includes at least a TV broadcasting signal, a component signal and a PC signal, and wherein the display device includes at least a CRT, a CDT, a CPT, an LCD, a PDP, a FED and a projector.  
     
     
         18 . A video display device comprising: 
 a first unit that processes an input signal provided from a transmission side to make a prescribed video signal;    a second unit that modifies a color reproduction of the video signal by using a signal source information and a display device information; and    a display unit coupled to the second unit and configured to display the modified color reproduction signal.    
     
     
         19 . The video display device according to  claim 18 , further comprising a selection unit coupled to a front end of the first unit that switches a channel to select a corresponding input signal provided from a transmission side.  
     
     
         20 . The video display device according to  claim 18 , further comprising a memory unit configured to store the signal source information and the display device information.  
     
     
         21 . The video display device according to  claim 20 , wherein the signal source information comprises kinds of the signal sources, a gamma information on each of the signal sources, a prescribed representation of a reference white and a prescribed representation of a phosphor on each of the signal sources.  
     
     
         22 . The video display device according to  claim 20 , wherein the display device information comprises kinds of the display devices, a gamma information on each of the display devices, a prescribed representation of a reference white and a prescribed representation of a phosphor on each of the display devices.  
     
     
         23 . The video display device according to  claim 18 , wherein the second unit comprises: 
 an inverse gamma correction unit that modifies the prescribed video signal according to the signal source information;    a correction unit that modifies a calorimetric error with respect to the modified inverse gamma signal; and    a gamma correction unit that modifies the modified calorimetric error signal according to the display device information.    
     
     
         24 . A video display device, comprising: 
 an input signal processor that modifies a signal provided from a transmission side to make a predetermined video signal;    a plurality of first gamma correctors that operate on the processed video signal according to types of signal sources;    a first switching circuit that correlates a signal corresponding to a predetermined signal source type among the first corrected gamma signals;    an error correction circuit for correcting calorimetric error with respect to the correlated signal;    a plurality of second gamma correctors that operate on the corrected calorimetric error signal according to types of display devices;    a second switching circuit that correlates a signal corresponding to a predetermined display device type among the gamma-corrected signals; and    a display that displays the signal correlated by the second switching.    
     
     
         25 . The video display device according to  claim 24 , further comprising a selector coupled to a front end of the processor that switches a channel to select a corresponding input signal provided from the transmission side.  
     
     
         26 . The video display device according to  claim 24 , wherein the predetermined signal source type is determined by at least one of user operation, a signal source mode selected by a user and prescribed identification information.  
     
     
         27 . The video display device according to  claim 24 , wherein the corrected inverse gamma signal has a linearity.  
     
     
         28 . The video display device according to  claim 24 , wherein the predetermined display device type is determined by at least one of a display device connected to the plurality of second gamma correctors, user operation and prescribed identification information.  
     
     
         29 . The video display device according to  claim 24 , wherein the colorimetric error is corrected by a matrix conversion between the signal source type and the display device type.  
     
     
         30 . A color reproduction correcting method comprising: 
 performing a first gamma correction to an input video signal according to a signal source;    correcting a colorimetric error with respect to the first gamma corrected signal; and    performing a second gamma correction to the corrected calorimetric error signal according to a display device.    
     
     
         31 . The color reproduction correcting method according to  claim 30 , wherein the colorimetric error is corrected by a prescribed conversion between the signal source and the display device.  
     
     
         32 . A video display method comprising: 
 processing an input signal to make a predetermined video signal;    correcting color reproduction of the processed video signal by using a signal source information and a display device information; and    displaying the corrected color reproduction signal.    
     
     
         33 . The video display method according to  claim 32 , further comprising selecting a channel corresponding to the input signal provided from a transmission side is selected.  
     
     
         34 . The video display method according to  claim 32 , wherein the correcting step comprises: 
 performing an inverse gamma correction to the processed video signal according to the signal source information;    correcting a calorimetric error with respect to the corrected inverse gamma signal; and    performing the gamma correction to the corrected calorimetric error signal according to the display device information.    
     
     
         35 . A video display method comprising: 
 processing an input signal provided from a transmission side to make a predetermined video signal;    performing a first gamma correction to the processed video signal according to kinds of signal sources;    performing first selecting a signal corresponding to a predetermined signal source among the first corrected gamma signals;    correcting a colorimetric error with respect to selected signal;    performing second selecting a signal corresponding to a predetermined display device among the colorimetric and gamma corrected signals; and    displaying the signal selected by the second selecting.    
     
     
         36 . The video display method according to  claim 35 , further comprising: 
 selecting a channel corresponding to the input signal provided from the transmission side; and    performing a second gamma correction to the corrected calorimetric error signal according to kinds of display devices.