Organic EL Display Black Matrix Thermal Conductivity

The patent applies local quality by varying the thermal conductivity of the black matrix in different regions. Specifically, the black matrix has higher thermal conductivity in regions corresponding to organic emission elements with lower emission efficiency (higher heat generation) and lower thermal conductivity in regions corresponding to elements with higher emission efficiency. This localized adjustment optimizes heat dissipation where needed most without requiring uniformly high-quality thermally conductive materials throughout the entire panel, thereby reducing manufacturing costs while effectively managing temperature.

The patent merges the heat absorption function of endothermic materials with the heat dissipation function of thermally conductive materials within the same black matrix structure. The black matrix simultaneously incorporates endothermic materials for heat absorption and maintains sufficient thermal conductivity (through selective regional enhancement) for heat dissipation to the outside, thereby combining both functions into a single integrated component rather than using separate layers.

The patent applies local quality by making the thermal conductivity of the black matrix spatially variable rather than uniform. The black matrix has higher thermal conductivity specifically in regions corresponding to organic emission elements with lower emission efficiency (which generate more heat) and lower thermal conductivity in other regions. This allows the use of lower quality, less expensive thermally conductive materials overall while still providing sufficient thermal dissipation performance where it is most needed, thereby maintaining reliability without requiring uniformly high-quality materials throughout.