Circuitry and method for driving LED display
AssigneeSct Technology, Ltd.
InventorsEric Li, Chun Lu
Life of this patent
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Abstract
This disclosure provides a circuit and a method for driving an LED display. The driving circuit comprises a selection circuit for selecting a first light emitter from the plurality of light emitters, a pre-charging circuit for charging an equivalent capacitor of the display panel with respect to the selected first light emitter, and a power circuit for supplying power to the first light emitter after the first light emitter is selected, wherein the power circuit is configured to supply a driving current to the first light emitter in one or more stages. The driving circuit and method of this disclosure can be used to significantly increase the refresh rate and resolution of the LED display.
Claims20
A display panel, comprising:
- a plurality of light emitters arranged;
- and
- a driving circuit electrically coupled with the plurality of light emitters;
- wherein the driving circuit comprises:
- a selection circuit for selecting a first light emitter from the plurality of light emitters;
- a pre-charging circuit for charging an equivalent capacitor of the display panel with respect to the selected first light emitter;
- and
- a power circuit for supplying power to the first light emitter after the first light emitter is selected, wherein the power circuit comprises a power source, and a current control mechanism coupled with the power source, wherein the current control mechanism is configured to supply a first current to the power source, when a driving current through the first light emitter is less than or equal to a first threshold value, and wherein the current control mechanism is configured to supply a second current to the power source, when the driving current is greater than the first threshold value and less than a second threshold value, wherein the first current is greater than the second current.
An apparatus for driving an array of light emitters, comprising:
- a selection circuit for selecting a first light emitter from the array of light emitters;
- a pre-charging circuit for charging an equivalent capacitor of the array with respect to the selected first light emitter;
- and
- a power circuit for supplying power to the first light emitter after the first light emitter is selected, wherein the power circuit comprises a power source and an current control mechanism coupled with the power source, wherein the current control mechanism is configured to supply a first current to the power source, when a driving current through the first light emitter is less than or equal to a first threshold value, and wherein the current control mechanism is configured to supply a second current to the power source, when the driving current is greater than the first threshold value and less than a second threshold value, wherein the first current is greater than the second current.
A method for driving a display panel including an array of light emitters, the method comprising:
- charging an equivalent capacitor of the array before a first light emitter is selected from the array of light emitters and after a previously selected light emitter is unselected;
- selecting the first light emitter;
- and
- applying a driving voltage to the first light emitter using a power source after the first light emitter is selected, so as to induce a driving current through the first light emitter, wherein applying the driving current further comprises:
- when the driving current is less than or equal to a first threshold value, applying a first current to the power source, and
- when the driving current is greater than the first threshold value and less than a second threshold value, applying a second current to the power source, wherein the first current is greater than the second current.
Dependencies are inferred from the claim text.