Packaged Light Emitting Diode And Touch Sensitive Apparatus Having The Same

Abstract: A packaged light emitting diode (109) comprises a light emitting diode die (110) and a cylindrical lens (112). The cylindrical lens is provided directly over a light emitting surface of the light emitting diode die. The cylindrical lens (112) is advantageously provided as a truncated substantially oblate ellipsoidal lens (112a) in a body having two first truncations (114) and one second truncation (116). As an alternative, the cylindrical lens (112) is provided as an aspherical lens (112b) in a modified ellipsoidal body having again two first truncations (114) and one second truncation (116). Light emitted through the lens (112, 112a; 112, 112b) has a narrow angular distribution along a first axis and a broad angular distribution along a second axis, orthogonal to the first axis. A touch sensitive apparatus comprising one or more such packaged light emitting diodes, being integrated within a top light-guiding plate (10) of said apparatus, is also described.

Patent Information

Applicants

Inventors

Specification

Documents

Application Documents