Dynamic image luminance adjustment based on backlight and/or ambient brightness

Abstract

Methods and apparatuses for the application of image intensity and luminance adjustment and gamma adjustment for the purpose of compensating perceived image brightness. Thereby enhancing the range of display backlight brightness adjustment that may be applied to conserve power, while minimizing impact to image color shade, hue or saturation characteristics.

1 - 52 . (canceled)  
   
   
       53 . An apparatus comprising: 
 a memory to store color data for an image to be displayed on a display device;    a first color transform agent communicatively coupled with the memory to modify the color data according to a first transform stored in a first look-up table;    a second color transform agent communicatively coupled with the memory to further modify the color data according to a second color transform determined by a second look-up table or gamma transfer function.    
   
   
       54 . The apparatus of  claim 53  wherein the second color transform agent comprises an agent to control one or more selected from image color brightness level and backlight intensity.  
   
   
       55 . The apparatus of  claim 54  wherein the first color transform agent comprises an electronic device operating system.  
   
   
       56 . The apparatus of  claim 53  further comprising a backlight control agent to control an intensity of light provided by an adjustable backlight source based on the second color transform.  
   
   
       57 . The apparatus of  claim 53  wherein the first color transform comprises a gamma look-up table.  
   
   
       58 . The apparatus of  claim 53  wherein the second color transform comprises a luminance look-up table.  
   
   
       59 . A method comprising: 
 modifying color data for one or more portions of an image using a first color transform;    modifying the color data for one or more portions of the image using a second color transform, wherein the second color transform is based, at least in part, on one or more selected from an image brightness profile and an ambient light level; and    storing the modified color data in a frame buffer.    
   
   
       60 . The method of  claim 59  further comprising modifying an intensity of light provided by a variable backlight source for a display device to display the image based, at least in part, on the one or more selected from the image brightness profile and the ambient light level.  
   
   
       61 . The method of  claim 59  wherein modifying the color data using the first transform comprises: 
 retrieving the color data; and    applying a transform determined by accessing a color look-up table.    
   
   
       62 . The method of  claim 59  wherein modifying the color data using the second transform comprises: 
 receiving the color data; and    applying a transform determined by accessing a color look-up table to modify a color brightness of one or more portions of the image.    
   
   
       63 . An article comprising a computer-readable medium having stored thereon instructions that, when executed, cause one or more components of an electronic system to: 
 modify color data for one or more portions of an image using a first color transform;    modify the color data for one or more portions of the image using a second color transform, wherein the second color transform is based, at least in part, on one or more selected from an image brightness profile and an ambient light level; and    store the modified color data in a frame buffer.    
   
   
       64 . The article of  claim 63  further comprising instructions that, when executed, cause the one or more components to modify an intensity of light provided by a variable backlight source for a display device to display the image based, at least in part, on the one or more selected from the image brightness profile and the ambient light level.  
   
   
       65 . The article of  claim 63  wherein the instructions that cause the one or more components to modify the color data using the first transform comprise instructions that, when executed, cause the one or more components to: 
 retrieve the color data; and    apply a transform determined by accessing a color look-up table.    
   
   
       66 . The article of  claim 63  wherein the instructions that cause the one or more components to modify the color data using the second transform comprise instructions that, when executed, cause the one or more components to: 
 receive the color data; and    apply a transform determined by accessing a color look-up table to modify a color brightness of one or more portions of the image.    
   
   
       67 . A system comprising: 
 a memory to store color data for an image on a display device;    a first color transform agent communicatively coupled with the memory to modify the color data according to a first transform stored in a first look-up table;    a second color transform agent communicatively coupled with the memory to modify the color data according to a second color transform determined by a second look-up table or gamma transfer function; and    an ambient light sensor.    
   
   
       68 . The system of  claim 67  wherein the second color transform agent comprises an agent to control one or more selected from image color brightness level and backlight intensity.  
   
   
       69 . The system of  claim 60  wherein the first color transform agent comprises an electronic device operating system.  
   
   
       70 . The system of  claim 67  further comprising a backlight control agent to control an intensity of light provided by an adjustable backlight source based on the second color transform.  
   
   
       71 . The system of  claim 67  wherein the first color transform comprises a gamma look-up table.  
   
   
       72 . The system of  claim 67  wherein the second color transform comprises a luminance look-up table.