Inventions on expressing emotions In Graphical User Interface
  The conventional GUI is more mechanical and does not recognize or communicate emotions. The modern GUIs are trying to infer the likely emotional state and personality of the user and communicate through a corresponding emotional state.   Emotions are expressed in graphical icons, sounds, pictures and other means. The emotions are found to be useful in especially in communication software, interactive learning systems, robotics and other adaptive environments. Various mechanisms have been developed to express emotions through graphical user interfaces. This article illustrates some interesting inventions selected from US patent database. 
Umakant Mishra
cs.HC