System and method for a long-life luminance feedback stabilized display panel

Abstract

A stabilized feedback display system and method for maintaining uniform pixel luminances in a display device. System includes a display device having a plurality of emissive picture elements (pixels) each formed from at least one electronic circuit device, a display driver circuit receiving a raw input image signal from an external image source and applying a corrected image signal to the display, a display luminance detector generating at least one display device luminance value, and a processing logic unit receiving the at least one display device luminance value and communicating information to the display driver circuit, the display driver circuit using this communicated information to generate a transformation for generating the corrected image signal from the raw input image signal.

1 . A stabilized feedback display system comprising: 
 a display device having a plurality of emissive picture elements (pixels) each formed from at least one electronic circuit device;    a display driver circuit receiving a raw input image signal from an external image source and applying a corrected image signal to the display;    a display luminance detector generating at least one display device luminance value; and    a processing logic unit receiving the at least one display device luminance value and communicating information to the display driver circuit, the display driver circuit using this communicated information to generate a transformation for generating the corrected image signal from the raw input image signal.    
     
     
         2 . A stabilized feedback display system as in  claim 1 , wherein each of the picture elements comprises: 
 a sample and hold circuit;    a current source controlled by the sample and hold circuit;    a photon emission device supplied by the current source; and    a luminance detection device disposed within a separation distance from the photon emission device for detecting photons emitted by the photon emission device.    
     
     
         3 . A stabilized feedback display system as in  claim 1 , wherein each of the picture elements comprises: 
 a photon emitter; and    a photon flux integrator disposed within the pixel to intercept a flux of photons from the photon emitter during a specified time, to undergo an electrical property change in response to the photons intercepted, to integrate or count the number of photons intercepted during the time, and to generate a signal indicative of a the total integrated photon flux during the specified time.    
     
     
         4 . A stabilized feedback display system as in  claim 3 , wherein the photon flux integrator comprises: 
 a sensor formed of a photo device that exhibits changing or variable properties in response to a changing or variable photon flux;    a charge storage device adapted to store or release charges; and    a control circuit that directs charges to or removes charges from the charge storage device in response to the change in resistance or conductance of the sensor.    
     
     
         5 . A stabilized feedback display system as in  claim 4 , wherein the charge storage device comprises a capacitor.  
     
     
         6 . A stabilized feedback display system as in  claim 4 , wherein the control circuit includes a transistor.  
     
     
         7 . A stabilized feedback display system as in  claim 4 , wherein the photodevice comprises a photo sensitive resistor that changes its resistance or conductance with changes of photon flux impinging on its surface.  
     
     
         8 . A stabilized feedback display system as in  claim 4 , wherein the photodevice comprises a photo diode the leakage of which increases or decreases with variations of photon flux impingent on its surface.  
     
     
         9 . A stabilized feedback display system as in  claim 8 , wherein the photo diode leakage comprises one or more of voltage leakage, current leakage, or charge leakage.  
     
     
         10 . A stabilized feedback display system as in  claim 4 , wherein the photodevice comprises a phototransistor the current of which increases or decreases with variations of photon flux impingent on the phototransistor surface.  
     
     
         11 . A stabilized feedback display system as in  claim 1 , wherein the luminance detector comprises a photon flux integrator.  
     
     
         12 . A stabilized feedback display system as in  claim 1 , wherein the picture element (pixel) comprises a particular photon flux integrator that integrates a photon flux emitted by the photon emission device within the same pixel as the photon flux integrator.  
     
     
         13 . A stabilized feedback display system as in  claim 3 , wherein each photon flux integrator comprises: 
 an isolation switching device for isolating a first circuit node from a second circuit node and having an output port (node);    a photosensitive unit having an input coupled to the isolation switching device output port (node) and an output connected with a voltage reference node; and    a charge storage device having a first electrode coupled with a first port of the isolation switch and a second electrode coupled with the voltage reference node.    
     
     
         14 . A stabilized feedback display system as in  claim 4 , wherein the charge storage device comprises a capacitor.  
     
     
         15 . A stabilized feedback display system as in  claim 4 , wherein the isolation switch comprises a transistor.  
     
     
         16 . A stabilized feedback display system as in  claim 4 , wherein the isolation switch is formed on a substrate as a thin film transistor (TFT).  
     
     
         17 . A stabilized feedback display system as in  claim 16 , wherein the thin film transistor is constructed from amorphous silicon.  
     
     
         18 . A stabilized feedback display system as in  claim 16 , wherein the thin film transistor is constructed from polysilicon.  
     
     
         19 . A stabilized feedback display system as in  claim 16 , wherein the thin film transistor is constructed from cadmium selenide.  
     
     
         20 . A stabilized feedback display system as in  claim 16 , wherein the thin film transistor is constructed from any semiconductor material.  
     
     
         21 . A stabilized feedback display system as in  claim 1 , wherein the thin film transistor comprises a channel defined in a material, and the material is selected from the set of materials consisting of: an amorphous silicon channel, a poly-silicon channel, a cadmium selenide channel, a gallium arsenide channel, and a channel formed or defined in any other semiconducting material.  
     
     
         22 . A stabilized feedback display system as in  claim 1 , wherein the display device comprises multiple picture elements arranged in a planar array.  
     
     
         23 . A stabilized feedback display system as in  claim 1 , wherein the multiple individual picture elements are addressed by column and row.  
     
     
         24 . A stabilized feedback display system as in  claim 3 , wherein the specified time is equal to or less than the row address time.  
     
     
         25 . A stabilized feedback display system as in  claim 3 , wherein the specified time is equal to or less than the frame time.  
     
     
         26 . A stabilized feedback display system as in  claim 3 , wherein the specified time is equal to multiple frame times.  
     
     
         27 . A stabilized feedback display system as in  claim 1 , wherein the display emissive device is an organic light emitting diode (OLED).  
     
     
         28 . A stabilized feedback display system as in  claim 27 , wherein the organic light emitting diode (OLED) is a small molecule OLED.  
     
     
         29 . A stabilized feedback display system as in  claim 27 , wherein the organic light emitting diode (OLED) is a polymer OLED (PLED).  
     
     
         30 . A stabilized feedback display system as in  claim 27 , wherein the organic light emitting diode (OLED) is a phosphorescent OLED (PHOLED).  
     
     
         31 . A stabilized feedback display system as in  claim 27 , wherein the organic light emitting diode (OLED) is constructed from any organic material in any combination of single or multiple layers of organic materials and electrodes.  
     
     
         32 . A stabilized feedback display system as in  claim 27 , wherein the organic light emitting diode (OLED) is a active matrix OLED.  
     
     
         33 . A stabilized feedback display system as in  claim 1 , wherein the display emissive device is an electroluminescent device.  
     
     
         34 . A stabilized feedback display system as in  claim 1 , wherein the display emissive device is an plasma emission device.  
     
     
         35 . A stabilized feedback display system as in  claim 1 , wherein the display emissive device is any controllable photon emissive device.  
     
     
         36 . A stabilized feedback display system as in  claim 32 , wherein the active matrix is constructed from amorphous silicon.  
     
     
         37 . A stabilized feedback display system as in  claim 32 , wherein the active matrix is constructed from poly silicon.  
     
     
         38 . A stabilized feedback display system as in  claim 32 , wherein the active matrix is constructed from cadmium selenide.  
     
     
         39 . A method for stabilizing a display system, the method comprising: 
 providing a display device having a plurality of emissive picture elements (pixels) each formed from at least one electronic circuit device;    receiving a raw input image signal by a display driver circuit from an external image source and applying a corrected image signal to the display;    detecting a display luminance and generating at least one display device luminance value; and    receiving the at least one display device luminance value by a processing logic unit and communicating information to the display driver circuit, and using this communicated information to generate a transformation for generating the corrected image signal from the raw input image signal.