Light color and intensity adjustable LED
First Claim
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1. An integrated photonic device comprising:
- a plurality of light emitting diodes (LEDs);
an optical transmission line coupled to the LEDs;
a light detector coupled to the optical transmission line and configured to detect a light output data individually from each of the LEDs through the optical transmission line;
a controller coupled to the light detector, wherein the controller contains a memory and a logic processor, the memory storing an algorithm and a predetermined light output value, the logic processors executing the algorithm based on the detected light output data, the predetermined light output value, and a user inputted value to perform the following steps;
receiving, from the light detector, the detected light output data individually for each LED; and
comparing, for each LED, the detected light output data with one of;
an initial light output data of said LED, a light output data of said LED from a previous detection, the predetermined light output value, and the user inputted value; and
a driver coupled to the controller, wherein the driver is configured to adjust, based on a comparison result from the controller, a current for each LED such that neighboring LEDs have uniform light outputs.
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Abstract
An integrated photonic device includes a number of LEDs and a feedback mechanism that measures individual LED light outputs using a photo sensor via a light transmitter disposed in the vicinity of individual LEDs. A controller or driver adjusts a current driven to each LED using the detected values according to various logic based on the device application.
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Citations
20 Claims
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1. An integrated photonic device comprising:
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a plurality of light emitting diodes (LEDs); an optical transmission line coupled to the LEDs; a light detector coupled to the optical transmission line and configured to detect a light output data individually from each of the LEDs through the optical transmission line; a controller coupled to the light detector, wherein the controller contains a memory and a logic processor, the memory storing an algorithm and a predetermined light output value, the logic processors executing the algorithm based on the detected light output data, the predetermined light output value, and a user inputted value to perform the following steps;
receiving, from the light detector, the detected light output data individually for each LED; and
comparing, for each LED, the detected light output data with one of;
an initial light output data of said LED, a light output data of said LED from a previous detection, the predetermined light output value, and the user inputted value; anda driver coupled to the controller, wherein the driver is configured to adjust, based on a comparison result from the controller, a current for each LED such that neighboring LEDs have uniform light outputs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. An integrated photonic device comprising:
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a light emitting device having a red LED, a blue LED, and a green LED; a driver coupled to each LED; an optical transmission line coupled to the light emitting device and configured to transmit a portion of light generated by each LED; a light detector coupled to the optical transmission line and configured to individually detect light output values from the red LED, the blue LED, and the green LED through the optical transmission line; and a controller coupled to the light detector and the drivers, said controller comprising a logic processor and a memory, wherein the memory stores an algorithm and a predefined targets for the red LED, the blue LED, and the green LED, and wherein the logic processor executes the algorithm based on the detected light output values, the predefined targets, and a user inputted value to individually adjust a driving current for each of the red LED, the blue LED, and the green LED, so that light outputs from the red LED, the blue LED, and the green LED each achieve the respective predefined targets or the user inputted value, and wherein the predefined targets for each LED includes one of;
an initial light output data of said LED or a light output data of said LED from a previous detection. - View Dependent Claims (11, 12, 13, 14)
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15. A display comprising:
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a light bar comprising a first LED bank including a group of first LEDs and a backup LED bank including a group of second LEDs that are counterparts of the first LEDs, wherein one or more of the second LEDs in the backup LED bank are individually activated to replace their counterparts in the first LED bank, a driver coupled to each of the groups of first and second LEDs, and an optical transmission line disposed to transmit a portion of light generated by each LED; and a light detector coupled to the optical transmission line and configured to individually detect a light output data from each of the first LEDs in the first LED bank through the optical transmission line; and a controller coupled to the light detector and the driver, said controller comprising a logic processor and a memory, the memory storing an algorithm and a predefined light output value, wherein the logic processor executes the algorithm based on the detected light output data, the predefined light output value, and a user inputted value to adjust LED light intensity or light color.
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16. A method comprising:
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measuring a light intensity of a plurality of LEDs, wherein the light intensity of each LED is measured individually; storing a predefined light output value in an electronic memory; receiving a user-defined light output value from a user input device; comparing the measured light intensity from each of the plurality of LEDs, wherein the comparing comprises individually comparing, for each LED, the measured light intensity with one of;
an initial light intensity of said LED, a light intensity for said LED from a previous measurement, the predefined light output value, or the user-defined light output value;adjusting, in response to the comparing, a current for each LED in at least a subset of the plurality of LEDs such that the light intensity from neighboring LEDs become uniform with one another. - View Dependent Claims (17, 18, 19, 20)
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Specification