Display structure for smooth transition between different pixel density regions in an oled display

An apparatus comprising:

• a light emitting diode (LED) display comprising pixel emissive areas that are each coupled by a corresponding conductive trace to a corresponding pixel circuit that drives the respective pixel emissive area, the LED display having a high density region, a low density region, and a transition region between the high density region and the low density region,
• wherein a density of pixel emissive areas in the high density region is higher than both a density of pixel emissive areas in the transition region and a density of pixel emissive areas in the low density region,
• wherein a pattern of pixel emissive areas in the transition region is different from a pattern of pixel emissive areas in the high density region and in the low density region,
• wherein a density of pixel circuits in the high density region is greater than a density of pixel circuits in the transition region, and
• wherein a pattern of the pixel circuits in the transition region matches a pattern of pixel circuits in the low density region, with at least some conductive traces that couple pixel emissive areas to pixel circuits in the transition region being longer than corresponding conductive traces that couple pixel emissive areas to pixel circuits in the low density region;
• and
• a sensor arranged to receive electromagnetic radiation transmitted through the low density region of the LED display.