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US 7,605,547 B2Granted
Addressable LED architecture
AssigneeSTMicroelectronics Asia Pacific Pte Ltd
InventorChee Yu Ng
Life of this patent
Estimating the term…
Abstract
The present disclosure provides an addressable light emitting diodes (LED) architecture that is able to control a plurality of LEDs individually. The present disclosure further provides a method of controlling the operation of at least one chain of serially connected LEDs.
Claims20
A light emitting diode (LED) architecture comprising:
- a plurality of chain controllers configured to generate predetermined drive currents, wherein the predetermined drive currents include switching signals;
- a plurality of LED devices, wherein the plurality of LED devices are serially connected to form a plurality of chains of LED devices, wherein each chain of LED devices is coupled to one of the plurality of chain controllers, wherein each LED device comprises:
- at least one LED;
- and
- a LED controller coupled to the LED, wherein the LED controller is configured to receive the switching signals for controlling the operation of the LED,
- wherein the plurality of chain controllers generate predetermined drive currents to control the operation of each LED controller in each chain of LED devices, thereby controlling the operation of each LED individually in the each chain of LED devices.
3 more elements
A method of controlling the operation of at least one chain of serially connected light emitting diodes (LEDs), the method comprising:
- generating predetermined drive currents by a chain controller, wherein the chain controller is coupled to the at least one chain of serially connected LEDs, wherein the predetermined drive currents include switching signals;
- receiving switching signals by a plurality of LED controllers, wherein each of the plurality of LED controllers is coupled to one of the serially connected LEDs, and
- wherein the plurality of LED controllers control the operation of the serially connected LEDs in response to the switching signals, thereby controlling the operation of the serially connected LEDs individually.
An addressable light emitting diode (LED) architecture comprising:
- a plurality of chain controllers configured to generate predetermined drive currents, wherein the predetermined drive currents include switching signals;
- a plurality of LED devices, wherein the plurality of LED devices are serially connected to form a plurality of chains of LED devices, wherein each chain of LED devices is coupled to one of the plurality of chain controllers, wherein each LED device comprises:
- at least one LED;
- and
- a LED controller coupled to the LED, wherein the LED controller is configured to receive the switching signals for controlling the operation of the LED,
- wherein the plurality of chain controllers generate predetermined drive currents to control the operation of each LED controller in each chain of LED devices, thereby controlling the operation of each LED individually in the each chain of LED devices;
- and
- a master controller coupled to the plurality of chain controllers to control the operation of the plurality of chain controllers.
5 more elements
Dependencies are inferred from the claim text.