Method and system for precharging OLED/PLED displays with a precharge latency
AssigneeClare Micronix Integrated Systems, Inc.
InventorRobert LeChevalier
Life of this patent
Estimating the term…
Abstract
An organic light emitting diode (OLED)/polymer OLED (PLED) displays and operation with a precharge latency. Particularly, precharging operation of such a display device with a precharge switch latency. According to the operation, a capacitive aspect of a display element is precharged, and the display element is activated so as to conducting a current therethrough. The precharging is terminated after the activation of the display element. Then a current is supplied and conducted through the display element for exposure of the display element. In this operation, a precharge droop that may occur during the transition between precharge and exposure can be avoided or minimized.
Claims45
A display device comprising:
- a voltage source;
- and
- a display element configured to emit light, said display element being electrically connected to said voltage source, wherein said voltage source is configured to supply a voltage to said display element for a duration that is longer than the duration necessary to raise a voltage level across said display element to a precharge voltage level.
A display device comprising:
- a voltage source;
- a plurality of display elements having N rows and M columns, such that a first terminal of each of the display elements in each column is electrically connected to a column line and a second terminal of each of the display elements in each row is electrically connected to a row line;
- a representative display element electrically connected to row line J and column line K;
- and
- a controller configured to apply said voltage source to said column line K before applying a ground signal to said row line J, and thereafter continue to apply said voltage source to said column line K for a predetermined period of time.
A display device comprising:
- means for supplying a voltage;
- and
- means for emitting light in response to an electrical current, wherein said supplying means provides a first terminal of said emitting means with said voltage for a duration that is longer than necessary to raise a voltage level across said emitting means to a precharge voltage level.
A display device comprising:
- means for supplying a voltage;
- a plurality of means for emitting light in response to an electrical current, wherein said plurality of emitting means are disposed in a matrix pattern having N rows and M columns, such that a first terminal of each of said emitting means in each column is electrically connected to a column line and a second terminal of each of said emitting means in each row is electrically connected to a row line;
- and
- a representative emitting means electrically connected to a row line J and a column line K, wherein said supplying means supplies said voltage source to said column line K for a duration that is longer than necessary to raise a voltage level across said representative emitting means to a precharge voltage level.
A program storage device storing instructions that, when executed by a processor, perform a method of operating a display device, the method comprising:
- applying a voltage source to a display element until a voltage level across the display element reaches a precharge voltage level;
- waiting a predetermined period of time beyond the time at which the precharge voltage level is reached across the display element;
- and
- removing said applied voltage source from said display element.
A method of operating a display device comprising a display element, the method comprising:
- applying a voltage source to said display element until a voltage level across said display element reaches a precharge voltage level;
- waiting a predetermined period of time beyond the time at which the precharge voltage level is reached across the display element;
- and
- removing said applied voltage source from said display element.
A method of operating a display device comprising a display element having a first terminal and a second terminal, comprising:
- precharging a capacitive aspect of said display;
- conducting a current through said display element;
- and
- terminating said precharging after said conducting of said current through said display element.
A method of manufacturing a display device, comprising:
- forming a matrix of electrically connected display elements having N rows and M columns;
- programming a controller with instructions to supply a voltage to a column of display elements for a duration longer than is necessary to raise a voltage level on said column of display elements to a level that is sufficient to illuminate a particular display element electrically connected to said column.
A method of illuminating an OLED having a first terminal and a second terminal comprising:
- supplying said first terminal with a voltage source;
- connecting said second terminal to ground when a voltage across said OLED is about equal to a precharge voltage level;
- removing said voltage source from said first terminal.
A method of operating a display device comprising a plurality of display elements having N rows and M columns, such that a first terminal of each of the display elements in each column is electrically connected to a column line and a second terminal of each of the display elements in each row is electrically connected to a row line, and a representative display element is electrically connected to a row line J and a column line K, the method comprising:
- preparing said representative display element for illumination by applying a voltage source to said column line K before applying a ground signal to said row line J, and thereafter continue applying said voltage source to said column line K for a predetermined period of time.
Dependencies are inferred from the claim text.