Light-Emitting Device With Variable Conductive Layer Thickness

The conductive layer is designed with different thicknesses in different regions: a first thickness in the first region and a second thickness (greater than the first) in the second region. This local variation in thickness allows the conductive layer to have different light absorption characteristics in different regions, compensating for the uneven light distribution caused by substrate absorption while maintaining electrical functionality.

The invention changes the physical parameter of the conductive layer (thickness) to control light absorption. By increasing the thickness in the second region, more light is absorbed there, which compensates for the light that would otherwise be lost due to substrate absorption, thereby achieving more uniform light distribution across the device.

The conductive layer thickness is locally optimized: thinner in the first region where less compensation is needed, and thicker in the second region where more compensation is needed. This localized approach achieves light distribution uniformity without uniformly increasing absorption across the entire device, thereby minimizing energy loss.

The conductive layer thickness is increased only partially and only in the specific region where it is needed to compensate for substrate absorption, rather than increasing it uniformly across the entire device. This partial action achieves the necessary light distribution uniformity while avoiding excessive light absorption and energy loss.