Optical and mechanical manipulation of light emitting diode (LED) lighting systems
Various examples concern techniques for opto-mechanically manipulating LED-based lighting systems. More specifically, various embodiments concern creating patterns of colored LEDs by determining the preferred color-specific density distribution and sequence(s) of LEDs. When creating the patterns, multiple considerations can be taken into account, including the power to be shared amongst the color channels when certain color models are generated by the linear array of LEDs, allocating an appropriate number of LEDs to each color channel to support the desired color spectrum, the sequencing of those LEDs along a string (e.g., as part of a linear array), etc. The appropriate number of LEDs for each color channel may be determined by first establishing the color model of the linear array within which the LEDs are interleaved.
1. A method of patterning a linear layout of color light-emitting diodes (LEDs) on a circuit board, the color LEDs being color mixed to produce a light, the method comprising:
determining flux ratios of color channels for color mixing to produce the light, wherein the flux ratios are determined to achieve a power efficacy within a threshold and one or more constraints;
generating a light-emitting diode (LED) distribution density for each one of the color channels based on the flux ratios of the color channels, the LED distribution density corresponding to positional density of the color LEDs of each of the color channels on the circuit board;
generating linear patterns of LEDs for the color channels on the circuit board by generating a linear pattern of LEDs at the LED distribution density for each one of the color channels; and
interweaving the linear patterns of LEDs for the color channels, on the circuit board, into a single line by overlapping and shifting the linear patterns of LEDs to generate the linear layout of the LEDs on the circuit board having multiple color channels.
2. The method of claim 1 , further comprising:
determining a maximum flux ratio for each one of the color channels according to the flux ratios; and
determining a unit distance for consistent color mixing of the LEDs.
3. The method of claim 2 , wherein the generating the LED distribution density comprises:
generating a LED distribution density as a minimal density for each one of the color channels based on the maximum flux ratio and the unit distance.
4. The method of claim 1 , further comprising:
discretizing positions of LEDs to prevent overlap of circuit elements of the LEDs.
5. The method of claim 1 , further comprising:
discretizing positions of LEDs to enforce an equal distance interval between the LEDs.
6. The method of claim 1 , wherein the generating the linear pattern of LEDs comprises:
generating a linear pattern of LEDs at the LED distribution density as a preferred pattern for each color channel, wherein the preferred pattern minimizes a number of unnecessary and underutilized LEDs.
7. The method of claim 1 , wherein the constraints include a desired color spectrum, a desired brightness level, or a desired level of power usage.
8. A device for determining a linear layout of color light-emitting diodes (LEDs) on a circuit board, the color LEDs being color mixed to produce a light, the device comprising:
means for computing flux ratios of color channels for color mixing to produce the light, wherein the computed flux ratios are determined to be within a threshold power efficacy and one or more color quality threshold metrics;
means for determining a maximum flux ratio for each one of the color channels according to the computed flux ratios;
means for determining a minimal density of each one of the color channels according to the maximum flux ratio and a unit distance on the circuit board to produce a linear pattern of LEDs on the circuit board at the minimal density for each one of the color channels, the minimal density of each one of the color channels corresponding to a minimal positional density of the color LEDs of each of the color channels on the circuit board; and
means for overlaying the linear pattern of each one of the color channels, on the circuit board, into a single line by overlapping and shifting the linear pattern of each one of the color channels to produce the linear layout of the LEDs on the circuit board having multiple color channels.
9. The device of claim 8 , wherein the light has a desired color rendering index (CRI) or a desired correlated color temperature (CCT).
10. The device of claim 8 , wherein the linear pattern of LEDs for each one of the color channels does not repeat continuously.
11. The device of claim 8 , wherein LEDs of each one of the color channels are arranged at different frequencies.