Aller Display is one of the font sets in Aller OpenType (TrueType flavored). It was created by Dalton Maag Ltd. for the Danish School of Media and Journalism.
Aller Display is a heavier weight, and includes complementary quirks: The lowercase letters in Aller Display are a combination of bubbly uppercase and lowercase glyphs, which give Aller Display somewhat of a dated look (reminiscent of a font created in the 1970s to try to look futuristic).Clare Brandt on Review: Aller Standard is a quirky, charming sans serif font
Aller Display takes the design of Aller in a slightly more extreme direction, using small caps for some of the lowercase letters. This gives your message more impact and bold recognition.Adobe Fonts