An electronic device comprising: a display frame having a stepped inner periphery, the stepped inner periphery comprising a first shelf and a second shelf; a light guide plate disposed within the display frame, the light guide plate comprising an edge and a set of optical input terminals along the edge; a set of light sources disposed along the edge of the light guide plate, each light source secured to the display frame and aligned with a respective optical input terminal of the set of optical input terminals; and an enclosure in which the display frame and the light guide plate are disposed, the enclosure configured to allow thermal expansion of the display frame and of the light guide plate; wherein the light guide plate and the display frame have substantially similar coefficients of thermal expansion such that alignment of the set of light sources and the set of optical input terminals is maintained, wherein: the electronic device further comprises a flexible circuit strip electrically connected to the set of light sources, the flexible circuit strip being pleated to allow for thermal expansion of the display frame along a length of the flexible circuit strip; the second shelf comprises a plurality of holes configured to accept alignment pins that engage the flexible circuit strip; the edge of the light guide comprises a plurality of notches along the edge of the light guide plate; and the display frame comprises a plurality of alignment posts, each alignment post engaging a respective notch of the plurality of notches; and each light source of the set of light sources is disposed between adjacent alignment posts of the plurality of alignment posts. a display frame having a stepped inner periphery, the stepped inner periphery comprising a first shelf and a second shelf; a light guide plate disposed within the display frame, the light guide plate comprising an edge and a set of optical input terminals along the edge; a set of light sources disposed along the edge of the light guide plate, each light source secured to the display frame and aligned with a respective optical input terminal of the set of optical input terminals; and an enclosure in which the display frame and the light guide plate are disposed, the enclosure configured to allow thermal expansion of the display frame and of the light guide plate; wherein the light guide plate and the display frame have substantially similar coefficients of thermal expansion such that alignment of the set of light sources and the set of optical input terminals is maintained, wherein: the electronic device further comprises a flexible circuit strip electrically connected to the set of light sources, the flexible circuit strip being pleated to allow for thermal expansion of the display frame along a length of the flexible circuit strip; the second shelf comprises a plurality of holes configured to accept alignment pins that engage the flexible circuit strip; the edge of the light guide comprises a plurality of notches along the edge of the light guide plate; and the display frame comprises a plurality of alignment posts, each alignment post engaging a respective notch of the plurality of notches; and each light source of the set of light sources is disposed between adjacent alignment posts of the plurality of alignment posts. the electronic device further comprises a flexible circuit strip electrically connected to the set of light sources, the flexible circuit strip being pleated to allow for thermal expansion of the display frame along a length of the flexible circuit strip; the second shelf comprises a plurality of holes configured to accept alignment pins that engage the flexible circuit strip; the edge of the light guide comprises a plurality of notches along the edge of the light guide plate; and the display frame comprises a plurality of alignment posts, each alignment post engaging a respective notch of the plurality of notches; and each light source of the set of light sources is disposed between adjacent alignment posts of the plurality of alignment posts.